LLVM  13.0.0git
Execution.cpp
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1 //===-- Execution.cpp - Implement code to simulate the program ------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file contains the actual instruction interpreter.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "Interpreter.h"
14 #include "llvm/ADT/APInt.h"
15 #include "llvm/ADT/Statistic.h"
16 #include "llvm/CodeGen/IntrinsicLowering.h"
17 #include "llvm/IR/Constants.h"
18 #include "llvm/IR/DerivedTypes.h"
19 #include "llvm/IR/GetElementPtrTypeIterator.h"
20 #include "llvm/IR/Instructions.h"
21 #include "llvm/Support/CommandLine.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/MathExtras.h"
25 #include "llvm/Support/raw_ostream.h"
26 #include <algorithm>
27 #include <cmath>
28 using namespace llvm;
29 
30 #define DEBUG_TYPE "interpreter"
31 
32 STATISTIC(NumDynamicInsts, "Number of dynamic instructions executed");
33 
34 static cl::opt<bool> PrintVolatile("interpreter-print-volatile", cl::Hidden,
35  cl::desc("make the interpreter print every volatile load and store"));
36 
37 //===----------------------------------------------------------------------===//
38 // Various Helper Functions
39 //===----------------------------------------------------------------------===//
40 
41 static void SetValue(Value *V, GenericValue Val, ExecutionContext &SF) {
42  SF.Values[V] = Val;
43 }
44 
45 //===----------------------------------------------------------------------===//
46 // Unary Instruction Implementations
47 //===----------------------------------------------------------------------===//
48 
49 static void executeFNegInst(GenericValue &Dest, GenericValue Src, Type *Ty) {
50  switch (Ty->getTypeID()) {
51  case Type::FloatTyID:
52  Dest.FloatVal = -Src.FloatVal;
53  break;
54  case Type::DoubleTyID:
55  Dest.DoubleVal = -Src.DoubleVal;
56  break;
57  default:
58  llvm_unreachable("Unhandled type for FNeg instruction");
59  }
60 }
61 
62 void Interpreter::visitUnaryOperator(UnaryOperator &I) {
63  ExecutionContext &SF = ECStack.back();
64  Type *Ty = I.getOperand(0)->getType();
65  GenericValue Src = getOperandValue(I.getOperand(0), SF);
66  GenericValue R; // Result
67 
68  // First process vector operation
69  if (Ty->isVectorTy()) {
70  R.AggregateVal.resize(Src.AggregateVal.size());
71 
72  switch(I.getOpcode()) {
73  default:
74  llvm_unreachable("Don't know how to handle this unary operator");
75  break;
76  case Instruction::FNeg:
77  if (cast<VectorType>(Ty)->getElementType()->isFloatTy()) {
78  for (unsigned i = 0; i < R.AggregateVal.size(); ++i)
79  R.AggregateVal[i].FloatVal = -Src.AggregateVal[i].FloatVal;
80  } else if (cast<VectorType>(Ty)->getElementType()->isDoubleTy()) {
81  for (unsigned i = 0; i < R.AggregateVal.size(); ++i)
82  R.AggregateVal[i].DoubleVal = -Src.AggregateVal[i].DoubleVal;
83  } else {
84  llvm_unreachable("Unhandled type for FNeg instruction");
85  }
86  break;
87  }
88  } else {
89  switch (I.getOpcode()) {
90  default:
91  llvm_unreachable("Don't know how to handle this unary operator");
92  break;
93  case Instruction::FNeg: executeFNegInst(R, Src, Ty); break;
94  }
95  }
96  SetValue(&I, R, SF);
97 }
98 
99 //===----------------------------------------------------------------------===//
100 // Binary Instruction Implementations
101 //===----------------------------------------------------------------------===//
102 
103 #define IMPLEMENT_BINARY_OPERATOR(OP, TY) \
104  case Type::TY##TyID: \
105  Dest.TY##Val = Src1.TY##Val OP Src2.TY##Val; \
106  break
107 
108 static void executeFAddInst(GenericValue &Dest, GenericValue Src1,
109  GenericValue Src2, Type *Ty) {
110  switch (Ty->getTypeID()) {
111  IMPLEMENT_BINARY_OPERATOR(+, Float);
112  IMPLEMENT_BINARY_OPERATOR(+, Double);
113  default:
114  dbgs() << "Unhandled type for FAdd instruction: " << *Ty << "\n";
115  llvm_unreachable(nullptr);
116  }
117 }
118 
119 static void executeFSubInst(GenericValue &Dest, GenericValue Src1,
120  GenericValue Src2, Type *Ty) {
121  switch (Ty->getTypeID()) {
122  IMPLEMENT_BINARY_OPERATOR(-, Float);
123  IMPLEMENT_BINARY_OPERATOR(-, Double);
124  default:
125  dbgs() << "Unhandled type for FSub instruction: " << *Ty << "\n";
126  llvm_unreachable(nullptr);
127  }
128 }
129 
130 static void executeFMulInst(GenericValue &Dest, GenericValue Src1,
131  GenericValue Src2, Type *Ty) {
132  switch (Ty->getTypeID()) {
133  IMPLEMENT_BINARY_OPERATOR(*, Float);
134  IMPLEMENT_BINARY_OPERATOR(*, Double);
135  default:
136  dbgs() << "Unhandled type for FMul instruction: " << *Ty << "\n";
137  llvm_unreachable(nullptr);
138  }
139 }
140 
141 static void executeFDivInst(GenericValue &Dest, GenericValue Src1,
142  GenericValue Src2, Type *Ty) {
143  switch (Ty->getTypeID()) {
144  IMPLEMENT_BINARY_OPERATOR(/, Float);
145  IMPLEMENT_BINARY_OPERATOR(/, Double);
146  default:
147  dbgs() << "Unhandled type for FDiv instruction: " << *Ty << "\n";
148  llvm_unreachable(nullptr);
149  }
150 }
151 
152 static void executeFRemInst(GenericValue &Dest, GenericValue Src1,
153  GenericValue Src2, Type *Ty) {
154  switch (Ty->getTypeID()) {
155  case Type::FloatTyID:
156  Dest.FloatVal = fmod(Src1.FloatVal, Src2.FloatVal);
157  break;
158  case Type::DoubleTyID:
159  Dest.DoubleVal = fmod(Src1.DoubleVal, Src2.DoubleVal);
160  break;
161  default:
162  dbgs() << "Unhandled type for Rem instruction: " << *Ty << "\n";
163  llvm_unreachable(nullptr);
164  }
165 }
166 
167 #define IMPLEMENT_INTEGER_ICMP(OP, TY) \
168  case Type::IntegerTyID: \
169  Dest.IntVal = APInt(1,Src1.IntVal.OP(Src2.IntVal)); \
170  break;
171 
172 #define IMPLEMENT_VECTOR_INTEGER_ICMP(OP, TY) \
173  case Type::FixedVectorTyID: \
174  case Type::ScalableVectorTyID: { \
175  assert(Src1.AggregateVal.size() == Src2.AggregateVal.size()); \
176  Dest.AggregateVal.resize(Src1.AggregateVal.size()); \
177  for (uint32_t _i = 0; _i < Src1.AggregateVal.size(); _i++) \
178  Dest.AggregateVal[_i].IntVal = APInt( \
179  1, Src1.AggregateVal[_i].IntVal.OP(Src2.AggregateVal[_i].IntVal)); \
180  } break;
181 
182 // Handle pointers specially because they must be compared with only as much
183 // width as the host has. We _do not_ want to be comparing 64 bit values when
184 // running on a 32-bit target, otherwise the upper 32 bits might mess up
185 // comparisons if they contain garbage.
186 #define IMPLEMENT_POINTER_ICMP(OP) \
187  case Type::PointerTyID: \
188  Dest.IntVal = APInt(1,(void*)(intptr_t)Src1.PointerVal OP \
189  (void*)(intptr_t)Src2.PointerVal); \
190  break;
191 
192 static GenericValue executeICMP_EQ(GenericValue Src1, GenericValue Src2,
193  Type *Ty) {
194  GenericValue Dest;
195  switch (Ty->getTypeID()) {
196  IMPLEMENT_INTEGER_ICMP(eq,Ty);
197  IMPLEMENT_VECTOR_INTEGER_ICMP(eq,Ty);
198  IMPLEMENT_POINTER_ICMP(==);
199  default:
200  dbgs() << "Unhandled type for ICMP_EQ predicate: " << *Ty << "\n";
201  llvm_unreachable(nullptr);
202  }
203  return Dest;
204 }
205 
206 static GenericValue executeICMP_NE(GenericValue Src1, GenericValue Src2,
207  Type *Ty) {
208  GenericValue Dest;
209  switch (Ty->getTypeID()) {
210  IMPLEMENT_INTEGER_ICMP(ne,Ty);
211  IMPLEMENT_VECTOR_INTEGER_ICMP(ne,Ty);
212  IMPLEMENT_POINTER_ICMP(!=);
213  default:
214  dbgs() << "Unhandled type for ICMP_NE predicate: " << *Ty << "\n";
215  llvm_unreachable(nullptr);
216  }
217  return Dest;
218 }
219 
220 static GenericValue executeICMP_ULT(GenericValue Src1, GenericValue Src2,
221  Type *Ty) {
222  GenericValue Dest;
223  switch (Ty->getTypeID()) {
224  IMPLEMENT_INTEGER_ICMP(ult,Ty);
225  IMPLEMENT_VECTOR_INTEGER_ICMP(ult,Ty);
226  IMPLEMENT_POINTER_ICMP(<);
227  default:
228  dbgs() << "Unhandled type for ICMP_ULT predicate: " << *Ty << "\n";
229  llvm_unreachable(nullptr);
230  }
231  return Dest;
232 }
233 
234 static GenericValue executeICMP_SLT(GenericValue Src1, GenericValue Src2,
235  Type *Ty) {
236  GenericValue Dest;
237  switch (Ty->getTypeID()) {
238  IMPLEMENT_INTEGER_ICMP(slt,Ty);
239  IMPLEMENT_VECTOR_INTEGER_ICMP(slt,Ty);
240  IMPLEMENT_POINTER_ICMP(<);
241  default:
242  dbgs() << "Unhandled type for ICMP_SLT predicate: " << *Ty << "\n";
243  llvm_unreachable(nullptr);
244  }
245  return Dest;
246 }
247 
248 static GenericValue executeICMP_UGT(GenericValue Src1, GenericValue Src2,
249  Type *Ty) {
250  GenericValue Dest;
251  switch (Ty->getTypeID()) {
252  IMPLEMENT_INTEGER_ICMP(ugt,Ty);
253  IMPLEMENT_VECTOR_INTEGER_ICMP(ugt,Ty);
254  IMPLEMENT_POINTER_ICMP(>);
255  default:
256  dbgs() << "Unhandled type for ICMP_UGT predicate: " << *Ty << "\n";
257  llvm_unreachable(nullptr);
258  }
259  return Dest;
260 }
261 
262 static GenericValue executeICMP_SGT(GenericValue Src1, GenericValue Src2,
263  Type *Ty) {
264  GenericValue Dest;
265  switch (Ty->getTypeID()) {
266  IMPLEMENT_INTEGER_ICMP(sgt,Ty);
267  IMPLEMENT_VECTOR_INTEGER_ICMP(sgt,Ty);
268  IMPLEMENT_POINTER_ICMP(>);
269  default:
270  dbgs() << "Unhandled type for ICMP_SGT predicate: " << *Ty << "\n";
271  llvm_unreachable(nullptr);
272  }
273  return Dest;
274 }
275 
276 static GenericValue executeICMP_ULE(GenericValue Src1, GenericValue Src2,
277  Type *Ty) {
278  GenericValue Dest;
279  switch (Ty->getTypeID()) {
280  IMPLEMENT_INTEGER_ICMP(ule,Ty);
281  IMPLEMENT_VECTOR_INTEGER_ICMP(ule,Ty);
282  IMPLEMENT_POINTER_ICMP(<=);
283  default:
284  dbgs() << "Unhandled type for ICMP_ULE predicate: " << *Ty << "\n";
285  llvm_unreachable(nullptr);
286  }
287  return Dest;
288 }
289 
290 static GenericValue executeICMP_SLE(GenericValue Src1, GenericValue Src2,
291  Type *Ty) {
292  GenericValue Dest;
293  switch (Ty->getTypeID()) {
294  IMPLEMENT_INTEGER_ICMP(sle,Ty);
295  IMPLEMENT_VECTOR_INTEGER_ICMP(sle,Ty);
296  IMPLEMENT_POINTER_ICMP(<=);
297  default:
298  dbgs() << "Unhandled type for ICMP_SLE predicate: " << *Ty << "\n";
299  llvm_unreachable(nullptr);
300  }
301  return Dest;
302 }
303 
304 static GenericValue executeICMP_UGE(GenericValue Src1, GenericValue Src2,
305  Type *Ty) {
306  GenericValue Dest;
307  switch (Ty->getTypeID()) {
308  IMPLEMENT_INTEGER_ICMP(uge,Ty);
309  IMPLEMENT_VECTOR_INTEGER_ICMP(uge,Ty);
310  IMPLEMENT_POINTER_ICMP(>=);
311  default:
312  dbgs() << "Unhandled type for ICMP_UGE predicate: " << *Ty << "\n";
313  llvm_unreachable(nullptr);
314  }
315  return Dest;
316 }
317 
318 static GenericValue executeICMP_SGE(GenericValue Src1, GenericValue Src2,
319  Type *Ty) {
320  GenericValue Dest;
321  switch (Ty->getTypeID()) {
322  IMPLEMENT_INTEGER_ICMP(sge,Ty);
323  IMPLEMENT_VECTOR_INTEGER_ICMP(sge,Ty);
324  IMPLEMENT_POINTER_ICMP(>=);
325  default:
326  dbgs() << "Unhandled type for ICMP_SGE predicate: " << *Ty << "\n";
327  llvm_unreachable(nullptr);
328  }
329  return Dest;
330 }
331 
332 void Interpreter::visitICmpInst(ICmpInst &I) {
333  ExecutionContext &SF = ECStack.back();
334  Type *Ty = I.getOperand(0)->getType();
335  GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
336  GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
337  GenericValue R; // Result
338 
339  switch (I.getPredicate()) {
340  case ICmpInst::ICMP_EQ: R = executeICMP_EQ(Src1, Src2, Ty); break;
341  case ICmpInst::ICMP_NE: R = executeICMP_NE(Src1, Src2, Ty); break;
342  case ICmpInst::ICMP_ULT: R = executeICMP_ULT(Src1, Src2, Ty); break;
343  case ICmpInst::ICMP_SLT: R = executeICMP_SLT(Src1, Src2, Ty); break;
344  case ICmpInst::ICMP_UGT: R = executeICMP_UGT(Src1, Src2, Ty); break;
345  case ICmpInst::ICMP_SGT: R = executeICMP_SGT(Src1, Src2, Ty); break;
346  case ICmpInst::ICMP_ULE: R = executeICMP_ULE(Src1, Src2, Ty); break;
347  case ICmpInst::ICMP_SLE: R = executeICMP_SLE(Src1, Src2, Ty); break;
348  case ICmpInst::ICMP_UGE: R = executeICMP_UGE(Src1, Src2, Ty); break;
349  case ICmpInst::ICMP_SGE: R = executeICMP_SGE(Src1, Src2, Ty); break;
350  default:
351  dbgs() << "Don't know how to handle this ICmp predicate!\n-->" << I;
352  llvm_unreachable(nullptr);
353  }
354 
355  SetValue(&I, R, SF);
356 }
357 
358 #define IMPLEMENT_FCMP(OP, TY) \
359  case Type::TY##TyID: \
360  Dest.IntVal = APInt(1,Src1.TY##Val OP Src2.TY##Val); \
361  break
362 
363 #define IMPLEMENT_VECTOR_FCMP_T(OP, TY) \
364  assert(Src1.AggregateVal.size() == Src2.AggregateVal.size()); \
365  Dest.AggregateVal.resize( Src1.AggregateVal.size() ); \
366  for( uint32_t _i=0;_i<Src1.AggregateVal.size();_i++) \
367  Dest.AggregateVal[_i].IntVal = APInt(1, \
368  Src1.AggregateVal[_i].TY##Val OP Src2.AggregateVal[_i].TY##Val);\
369  break;
370 
371 #define IMPLEMENT_VECTOR_FCMP(OP) \
372  case Type::FixedVectorTyID: \
373  case Type::ScalableVectorTyID: \
374  if (cast<VectorType>(Ty)->getElementType()->isFloatTy()) { \
375  IMPLEMENT_VECTOR_FCMP_T(OP, Float); \
376  } else { \
377  IMPLEMENT_VECTOR_FCMP_T(OP, Double); \
378  }
379 
380 static GenericValue executeFCMP_OEQ(GenericValue Src1, GenericValue Src2,
381  Type *Ty) {
382  GenericValue Dest;
383  switch (Ty->getTypeID()) {
384  IMPLEMENT_FCMP(==, Float);
385  IMPLEMENT_FCMP(==, Double);
386  IMPLEMENT_VECTOR_FCMP(==);
387  default:
388  dbgs() << "Unhandled type for FCmp EQ instruction: " << *Ty << "\n";
389  llvm_unreachable(nullptr);
390  }
391  return Dest;
392 }
393 
394 #define IMPLEMENT_SCALAR_NANS(TY, X,Y) \
395  if (TY->isFloatTy()) { \
396  if (X.FloatVal != X.FloatVal || Y.FloatVal != Y.FloatVal) { \
397  Dest.IntVal = APInt(1,false); \
398  return Dest; \
399  } \
400  } else { \
401  if (X.DoubleVal != X.DoubleVal || Y.DoubleVal != Y.DoubleVal) { \
402  Dest.IntVal = APInt(1,false); \
403  return Dest; \
404  } \
405  }
406 
407 #define MASK_VECTOR_NANS_T(X,Y, TZ, FLAG) \
408  assert(X.AggregateVal.size() == Y.AggregateVal.size()); \
409  Dest.AggregateVal.resize( X.AggregateVal.size() ); \
410  for( uint32_t _i=0;_i<X.AggregateVal.size();_i++) { \
411  if (X.AggregateVal[_i].TZ##Val != X.AggregateVal[_i].TZ##Val || \
412  Y.AggregateVal[_i].TZ##Val != Y.AggregateVal[_i].TZ##Val) \
413  Dest.AggregateVal[_i].IntVal = APInt(1,FLAG); \
414  else { \
415  Dest.AggregateVal[_i].IntVal = APInt(1,!FLAG); \
416  } \
417  }
418 
419 #define MASK_VECTOR_NANS(TY, X,Y, FLAG) \
420  if (TY->isVectorTy()) { \
421  if (cast<VectorType>(TY)->getElementType()->isFloatTy()) { \
422  MASK_VECTOR_NANS_T(X, Y, Float, FLAG) \
423  } else { \
424  MASK_VECTOR_NANS_T(X, Y, Double, FLAG) \
425  } \
426  } \
427 
428 
429 
430 static GenericValue executeFCMP_ONE(GenericValue Src1, GenericValue Src2,
431  Type *Ty)
432 {
433  GenericValue Dest;
434  // if input is scalar value and Src1 or Src2 is NaN return false
435  IMPLEMENT_SCALAR_NANS(Ty, Src1, Src2)
436  // if vector input detect NaNs and fill mask
437  MASK_VECTOR_NANS(Ty, Src1, Src2, false)
438  GenericValue DestMask = Dest;
439  switch (Ty->getTypeID()) {
440  IMPLEMENT_FCMP(!=, Float);
441  IMPLEMENT_FCMP(!=, Double);
442  IMPLEMENT_VECTOR_FCMP(!=);
443  default:
444  dbgs() << "Unhandled type for FCmp NE instruction: " << *Ty << "\n";
445  llvm_unreachable(nullptr);
446  }
447  // in vector case mask out NaN elements
448  if (Ty->isVectorTy())
449  for( size_t _i=0; _i<Src1.AggregateVal.size(); _i++)
450  if (DestMask.AggregateVal[_i].IntVal == false)
451  Dest.AggregateVal[_i].IntVal = APInt(1,false);
452 
453  return Dest;
454 }
455 
456 static GenericValue executeFCMP_OLE(GenericValue Src1, GenericValue Src2,
457  Type *Ty) {
458  GenericValue Dest;
459  switch (Ty->getTypeID()) {
460  IMPLEMENT_FCMP(<=, Float);
461  IMPLEMENT_FCMP(<=, Double);
462  IMPLEMENT_VECTOR_FCMP(<=);
463  default:
464  dbgs() << "Unhandled type for FCmp LE instruction: " << *Ty << "\n";
465  llvm_unreachable(nullptr);
466  }
467  return Dest;
468 }
469 
470 static GenericValue executeFCMP_OGE(GenericValue Src1, GenericValue Src2,
471  Type *Ty) {
472  GenericValue Dest;
473  switch (Ty->getTypeID()) {
474  IMPLEMENT_FCMP(>=, Float);
475  IMPLEMENT_FCMP(>=, Double);
476  IMPLEMENT_VECTOR_FCMP(>=);
477  default:
478  dbgs() << "Unhandled type for FCmp GE instruction: " << *Ty << "\n";
479  llvm_unreachable(nullptr);
480  }
481  return Dest;
482 }
483 
484 static GenericValue executeFCMP_OLT(GenericValue Src1, GenericValue Src2,
485  Type *Ty) {
486  GenericValue Dest;
487  switch (Ty->getTypeID()) {
488  IMPLEMENT_FCMP(<, Float);
489  IMPLEMENT_FCMP(<, Double);
490  IMPLEMENT_VECTOR_FCMP(<);
491  default:
492  dbgs() << "Unhandled type for FCmp LT instruction: " << *Ty << "\n";
493  llvm_unreachable(nullptr);
494  }
495  return Dest;
496 }
497 
498 static GenericValue executeFCMP_OGT(GenericValue Src1, GenericValue Src2,
499  Type *Ty) {
500  GenericValue Dest;
501  switch (Ty->getTypeID()) {
502  IMPLEMENT_FCMP(>, Float);
503  IMPLEMENT_FCMP(>, Double);
504  IMPLEMENT_VECTOR_FCMP(>);
505  default:
506  dbgs() << "Unhandled type for FCmp GT instruction: " << *Ty << "\n";
507  llvm_unreachable(nullptr);
508  }
509  return Dest;
510 }
511 
512 #define IMPLEMENT_UNORDERED(TY, X,Y) \
513  if (TY->isFloatTy()) { \
514  if (X.FloatVal != X.FloatVal || Y.FloatVal != Y.FloatVal) { \
515  Dest.IntVal = APInt(1,true); \
516  return Dest; \
517  } \
518  } else if (X.DoubleVal != X.DoubleVal || Y.DoubleVal != Y.DoubleVal) { \
519  Dest.IntVal = APInt(1,true); \
520  return Dest; \
521  }
522 
523 #define IMPLEMENT_VECTOR_UNORDERED(TY, X, Y, FUNC) \
524  if (TY->isVectorTy()) { \
525  GenericValue DestMask = Dest; \
526  Dest = FUNC(Src1, Src2, Ty); \
527  for (size_t _i = 0; _i < Src1.AggregateVal.size(); _i++) \
528  if (DestMask.AggregateVal[_i].IntVal == true) \
529  Dest.AggregateVal[_i].IntVal = APInt(1, true); \
530  return Dest; \
531  }
532 
533 static GenericValue executeFCMP_UEQ(GenericValue Src1, GenericValue Src2,
534  Type *Ty) {
535  GenericValue Dest;
536  IMPLEMENT_UNORDERED(Ty, Src1, Src2)
537  MASK_VECTOR_NANS(Ty, Src1, Src2, true)
538  IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_OEQ)
539  return executeFCMP_OEQ(Src1, Src2, Ty);
540 
541 }
542 
543 static GenericValue executeFCMP_UNE(GenericValue Src1, GenericValue Src2,
544  Type *Ty) {
545  GenericValue Dest;
546  IMPLEMENT_UNORDERED(Ty, Src1, Src2)
547  MASK_VECTOR_NANS(Ty, Src1, Src2, true)
548  IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_ONE)
549  return executeFCMP_ONE(Src1, Src2, Ty);
550 }
551 
552 static GenericValue executeFCMP_ULE(GenericValue Src1, GenericValue Src2,
553  Type *Ty) {
554  GenericValue Dest;
555  IMPLEMENT_UNORDERED(Ty, Src1, Src2)
556  MASK_VECTOR_NANS(Ty, Src1, Src2, true)
557  IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_OLE)
558  return executeFCMP_OLE(Src1, Src2, Ty);
559 }
560 
561 static GenericValue executeFCMP_UGE(GenericValue Src1, GenericValue Src2,
562  Type *Ty) {
563  GenericValue Dest;
564  IMPLEMENT_UNORDERED(Ty, Src1, Src2)
565  MASK_VECTOR_NANS(Ty, Src1, Src2, true)
566  IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_OGE)
567  return executeFCMP_OGE(Src1, Src2, Ty);
568 }
569 
570 static GenericValue executeFCMP_ULT(GenericValue Src1, GenericValue Src2,
571  Type *Ty) {
572  GenericValue Dest;
573  IMPLEMENT_UNORDERED(Ty, Src1, Src2)
574  MASK_VECTOR_NANS(Ty, Src1, Src2, true)
575  IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_OLT)
576  return executeFCMP_OLT(Src1, Src2, Ty);
577 }
578 
579 static GenericValue executeFCMP_UGT(GenericValue Src1, GenericValue Src2,
580  Type *Ty) {
581  GenericValue Dest;
582  IMPLEMENT_UNORDERED(Ty, Src1, Src2)
583  MASK_VECTOR_NANS(Ty, Src1, Src2, true)
584  IMPLEMENT_VECTOR_UNORDERED(Ty, Src1, Src2, executeFCMP_OGT)
585  return executeFCMP_OGT(Src1, Src2, Ty);
586 }
587 
588 static GenericValue executeFCMP_ORD(GenericValue Src1, GenericValue Src2,
589  Type *Ty) {
590  GenericValue Dest;
591  if(Ty->isVectorTy()) {
592  assert(Src1.AggregateVal.size() == Src2.AggregateVal.size());
593  Dest.AggregateVal.resize( Src1.AggregateVal.size() );
594  if (cast<VectorType>(Ty)->getElementType()->isFloatTy()) {
595  for( size_t _i=0;_i<Src1.AggregateVal.size();_i++)
596  Dest.AggregateVal[_i].IntVal = APInt(1,
597  ( (Src1.AggregateVal[_i].FloatVal ==
598  Src1.AggregateVal[_i].FloatVal) &&
599  (Src2.AggregateVal[_i].FloatVal ==
600  Src2.AggregateVal[_i].FloatVal)));
601  } else {
602  for( size_t _i=0;_i<Src1.AggregateVal.size();_i++)
603  Dest.AggregateVal[_i].IntVal = APInt(1,
604  ( (Src1.AggregateVal[_i].DoubleVal ==
605  Src1.AggregateVal[_i].DoubleVal) &&
606  (Src2.AggregateVal[_i].DoubleVal ==
607  Src2.AggregateVal[_i].DoubleVal)));
608  }
609  } else if (Ty->isFloatTy())
610  Dest.IntVal = APInt(1,(Src1.FloatVal == Src1.FloatVal &&
611  Src2.FloatVal == Src2.FloatVal));
612  else {
613  Dest.IntVal = APInt(1,(Src1.DoubleVal == Src1.DoubleVal &&
614  Src2.DoubleVal == Src2.DoubleVal));
615  }
616  return Dest;
617 }
618 
619 static GenericValue executeFCMP_UNO(GenericValue Src1, GenericValue Src2,
620  Type *Ty) {
621  GenericValue Dest;
622  if(Ty->isVectorTy()) {
623  assert(Src1.AggregateVal.size() == Src2.AggregateVal.size());
624  Dest.AggregateVal.resize( Src1.AggregateVal.size() );
625  if (cast<VectorType>(Ty)->getElementType()->isFloatTy()) {
626  for( size_t _i=0;_i<Src1.AggregateVal.size();_i++)
627  Dest.AggregateVal[_i].IntVal = APInt(1,
628  ( (Src1.AggregateVal[_i].FloatVal !=
629  Src1.AggregateVal[_i].FloatVal) ||
630  (Src2.AggregateVal[_i].FloatVal !=
631  Src2.AggregateVal[_i].FloatVal)));
632  } else {
633  for( size_t _i=0;_i<Src1.AggregateVal.size();_i++)
634  Dest.AggregateVal[_i].IntVal = APInt(1,
635  ( (Src1.AggregateVal[_i].DoubleVal !=
636  Src1.AggregateVal[_i].DoubleVal) ||
637  (Src2.AggregateVal[_i].DoubleVal !=
638  Src2.AggregateVal[_i].DoubleVal)));
639  }
640  } else if (Ty->isFloatTy())
641  Dest.IntVal = APInt(1,(Src1.FloatVal != Src1.FloatVal ||
642  Src2.FloatVal != Src2.FloatVal));
643  else {
644  Dest.IntVal = APInt(1,(Src1.DoubleVal != Src1.DoubleVal ||
645  Src2.DoubleVal != Src2.DoubleVal));
646  }
647  return Dest;
648 }
649 
650 static GenericValue executeFCMP_BOOL(GenericValue Src1, GenericValue Src2,
651  Type *Ty, const bool val) {
652  GenericValue Dest;
653  if(Ty->isVectorTy()) {
654  assert(Src1.AggregateVal.size() == Src2.AggregateVal.size());
655  Dest.AggregateVal.resize( Src1.AggregateVal.size() );
656  for( size_t _i=0; _i<Src1.AggregateVal.size(); _i++)
657  Dest.AggregateVal[_i].IntVal = APInt(1,val);
658  } else {
659  Dest.IntVal = APInt(1, val);
660  }
661 
662  return Dest;
663 }
664 
665 void Interpreter::visitFCmpInst(FCmpInst &I) {
666  ExecutionContext &SF = ECStack.back();
667  Type *Ty = I.getOperand(0)->getType();
668  GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
669  GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
670  GenericValue R; // Result
671 
672  switch (I.getPredicate()) {
673  default:
674  dbgs() << "Don't know how to handle this FCmp predicate!\n-->" << I;
675  llvm_unreachable(nullptr);
676  break;
677  case FCmpInst::FCMP_FALSE: R = executeFCMP_BOOL(Src1, Src2, Ty, false);
678  break;
679  case FCmpInst::FCMP_TRUE: R = executeFCMP_BOOL(Src1, Src2, Ty, true);
680  break;
681  case FCmpInst::FCMP_ORD: R = executeFCMP_ORD(Src1, Src2, Ty); break;
682  case FCmpInst::FCMP_UNO: R = executeFCMP_UNO(Src1, Src2, Ty); break;
683  case FCmpInst::FCMP_UEQ: R = executeFCMP_UEQ(Src1, Src2, Ty); break;
684  case FCmpInst::FCMP_OEQ: R = executeFCMP_OEQ(Src1, Src2, Ty); break;
685  case FCmpInst::FCMP_UNE: R = executeFCMP_UNE(Src1, Src2, Ty); break;
686  case FCmpInst::FCMP_ONE: R = executeFCMP_ONE(Src1, Src2, Ty); break;
687  case FCmpInst::FCMP_ULT: R = executeFCMP_ULT(Src1, Src2, Ty); break;
688  case FCmpInst::FCMP_OLT: R = executeFCMP_OLT(Src1, Src2, Ty); break;
689  case FCmpInst::FCMP_UGT: R = executeFCMP_UGT(Src1, Src2, Ty); break;
690  case FCmpInst::FCMP_OGT: R = executeFCMP_OGT(Src1, Src2, Ty); break;
691  case FCmpInst::FCMP_ULE: R = executeFCMP_ULE(Src1, Src2, Ty); break;
692  case FCmpInst::FCMP_OLE: R = executeFCMP_OLE(Src1, Src2, Ty); break;
693  case FCmpInst::FCMP_UGE: R = executeFCMP_UGE(Src1, Src2, Ty); break;
694  case FCmpInst::FCMP_OGE: R = executeFCMP_OGE(Src1, Src2, Ty); break;
695  }
696 
697  SetValue(&I, R, SF);
698 }
699 
700 static GenericValue executeCmpInst(unsigned predicate, GenericValue Src1,
701  GenericValue Src2, Type *Ty) {
702  GenericValue Result;
703  switch (predicate) {
704  case ICmpInst::ICMP_EQ: return executeICMP_EQ(Src1, Src2, Ty);
705  case ICmpInst::ICMP_NE: return executeICMP_NE(Src1, Src2, Ty);
706  case ICmpInst::ICMP_UGT: return executeICMP_UGT(Src1, Src2, Ty);
707  case ICmpInst::ICMP_SGT: return executeICMP_SGT(Src1, Src2, Ty);
708  case ICmpInst::ICMP_ULT: return executeICMP_ULT(Src1, Src2, Ty);
709  case ICmpInst::ICMP_SLT: return executeICMP_SLT(Src1, Src2, Ty);
710  case ICmpInst::ICMP_UGE: return executeICMP_UGE(Src1, Src2, Ty);
711  case ICmpInst::ICMP_SGE: return executeICMP_SGE(Src1, Src2, Ty);
712  case ICmpInst::ICMP_ULE: return executeICMP_ULE(Src1, Src2, Ty);
713  case ICmpInst::ICMP_SLE: return executeICMP_SLE(Src1, Src2, Ty);
714  case FCmpInst::FCMP_ORD: return executeFCMP_ORD(Src1, Src2, Ty);
715  case FCmpInst::FCMP_UNO: return executeFCMP_UNO(Src1, Src2, Ty);
716  case FCmpInst::FCMP_OEQ: return executeFCMP_OEQ(Src1, Src2, Ty);
717  case FCmpInst::FCMP_UEQ: return executeFCMP_UEQ(Src1, Src2, Ty);
718  case FCmpInst::FCMP_ONE: return executeFCMP_ONE(Src1, Src2, Ty);
719  case FCmpInst::FCMP_UNE: return executeFCMP_UNE(Src1, Src2, Ty);
720  case FCmpInst::FCMP_OLT: return executeFCMP_OLT(Src1, Src2, Ty);
721  case FCmpInst::FCMP_ULT: return executeFCMP_ULT(Src1, Src2, Ty);
722  case FCmpInst::FCMP_OGT: return executeFCMP_OGT(Src1, Src2, Ty);
723  case FCmpInst::FCMP_UGT: return executeFCMP_UGT(Src1, Src2, Ty);
724  case FCmpInst::FCMP_OLE: return executeFCMP_OLE(Src1, Src2, Ty);
725  case FCmpInst::FCMP_ULE: return executeFCMP_ULE(Src1, Src2, Ty);
726  case FCmpInst::FCMP_OGE: return executeFCMP_OGE(Src1, Src2, Ty);
727  case FCmpInst::FCMP_UGE: return executeFCMP_UGE(Src1, Src2, Ty);
728  case FCmpInst::FCMP_FALSE: return executeFCMP_BOOL(Src1, Src2, Ty, false);
729  case FCmpInst::FCMP_TRUE: return executeFCMP_BOOL(Src1, Src2, Ty, true);
730  default:
731  dbgs() << "Unhandled Cmp predicate\n";
732  llvm_unreachable(nullptr);
733  }
734 }
735 
736 void Interpreter::visitBinaryOperator(BinaryOperator &I) {
737  ExecutionContext &SF = ECStack.back();
738  Type *Ty = I.getOperand(0)->getType();
739  GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
740  GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
741  GenericValue R; // Result
742 
743  // First process vector operation
744  if (Ty->isVectorTy()) {
745  assert(Src1.AggregateVal.size() == Src2.AggregateVal.size());
746  R.AggregateVal.resize(Src1.AggregateVal.size());
747 
748  // Macros to execute binary operation 'OP' over integer vectors
749 #define INTEGER_VECTOR_OPERATION(OP) \
750  for (unsigned i = 0; i < R.AggregateVal.size(); ++i) \
751  R.AggregateVal[i].IntVal = \
752  Src1.AggregateVal[i].IntVal OP Src2.AggregateVal[i].IntVal;
753 
754  // Additional macros to execute binary operations udiv/sdiv/urem/srem since
755  // they have different notation.
756 #define INTEGER_VECTOR_FUNCTION(OP) \
757  for (unsigned i = 0; i < R.AggregateVal.size(); ++i) \
758  R.AggregateVal[i].IntVal = \
759  Src1.AggregateVal[i].IntVal.OP(Src2.AggregateVal[i].IntVal);
760 
761  // Macros to execute binary operation 'OP' over floating point type TY
762  // (float or double) vectors
763 #define FLOAT_VECTOR_FUNCTION(OP, TY) \
764  for (unsigned i = 0; i < R.AggregateVal.size(); ++i) \
765  R.AggregateVal[i].TY = \
766  Src1.AggregateVal[i].TY OP Src2.AggregateVal[i].TY;
767 
768  // Macros to choose appropriate TY: float or double and run operation
769  // execution
770 #define FLOAT_VECTOR_OP(OP) { \
771  if (cast<VectorType>(Ty)->getElementType()->isFloatTy()) \
772  FLOAT_VECTOR_FUNCTION(OP, FloatVal) \
773  else { \
774  if (cast<VectorType>(Ty)->getElementType()->isDoubleTy()) \
775  FLOAT_VECTOR_FUNCTION(OP, DoubleVal) \
776  else { \
777  dbgs() << "Unhandled type for OP instruction: " << *Ty << "\n"; \
778  llvm_unreachable(0); \
779  } \
780  } \
781 }
782 
783  switch(I.getOpcode()){
784  default:
785  dbgs() << "Don't know how to handle this binary operator!\n-->" << I;
786  llvm_unreachable(nullptr);
787  break;
788  case Instruction::Add: INTEGER_VECTOR_OPERATION(+) break;
789  case Instruction::Sub: INTEGER_VECTOR_OPERATION(-) break;
790  case Instruction::Mul: INTEGER_VECTOR_OPERATION(*) break;
791  case Instruction::UDiv: INTEGER_VECTOR_FUNCTION(udiv) break;
792  case Instruction::SDiv: INTEGER_VECTOR_FUNCTION(sdiv) break;
793  case Instruction::URem: INTEGER_VECTOR_FUNCTION(urem) break;
794  case Instruction::SRem: INTEGER_VECTOR_FUNCTION(srem) break;
795  case Instruction::And: INTEGER_VECTOR_OPERATION(&) break;
796  case Instruction::Or: INTEGER_VECTOR_OPERATION(|) break;
797  case Instruction::Xor: INTEGER_VECTOR_OPERATION(^) break;
798  case Instruction::FAdd: FLOAT_VECTOR_OP(+) break;
799  case Instruction::FSub: FLOAT_VECTOR_OP(-) break;
800  case Instruction::FMul: FLOAT_VECTOR_OP(*) break;
801  case Instruction::FDiv: FLOAT_VECTOR_OP(/) break;
802  case Instruction::FRem:
803  if (cast<VectorType>(Ty)->getElementType()->isFloatTy())
804  for (unsigned i = 0; i < R.AggregateVal.size(); ++i)
805  R.AggregateVal[i].FloatVal =
806  fmod(Src1.AggregateVal[i].FloatVal, Src2.AggregateVal[i].FloatVal);
807  else {
808  if (cast<VectorType>(Ty)->getElementType()->isDoubleTy())
809  for (unsigned i = 0; i < R.AggregateVal.size(); ++i)
810  R.AggregateVal[i].DoubleVal =
811  fmod(Src1.AggregateVal[i].DoubleVal, Src2.AggregateVal[i].DoubleVal);
812  else {
813  dbgs() << "Unhandled type for Rem instruction: " << *Ty << "\n";
814  llvm_unreachable(nullptr);
815  }
816  }
817  break;
818  }
819  } else {
820  switch (I.getOpcode()) {
821  default:
822  dbgs() << "Don't know how to handle this binary operator!\n-->" << I;
823  llvm_unreachable(nullptr);
824  break;
825  case Instruction::Add: R.IntVal = Src1.IntVal + Src2.IntVal; break;
826  case Instruction::Sub: R.IntVal = Src1.IntVal - Src2.IntVal; break;
827  case Instruction::Mul: R.IntVal = Src1.IntVal * Src2.IntVal; break;
828  case Instruction::FAdd: executeFAddInst(R, Src1, Src2, Ty); break;
829  case Instruction::FSub: executeFSubInst(R, Src1, Src2, Ty); break;
830  case Instruction::FMul: executeFMulInst(R, Src1, Src2, Ty); break;
831  case Instruction::FDiv: executeFDivInst(R, Src1, Src2, Ty); break;
832  case Instruction::FRem: executeFRemInst(R, Src1, Src2, Ty); break;
833  case Instruction::UDiv: R.IntVal = Src1.IntVal.udiv(Src2.IntVal); break;
834  case Instruction::SDiv: R.IntVal = Src1.IntVal.sdiv(Src2.IntVal); break;
835  case Instruction::URem: R.IntVal = Src1.IntVal.urem(Src2.IntVal); break;
836  case Instruction::SRem: R.IntVal = Src1.IntVal.srem(Src2.IntVal); break;
837  case Instruction::And: R.IntVal = Src1.IntVal & Src2.IntVal; break;
838  case Instruction::Or: R.IntVal = Src1.IntVal | Src2.IntVal; break;
839  case Instruction::Xor: R.IntVal = Src1.IntVal ^ Src2.IntVal; break;
840  }
841  }
842  SetValue(&I, R, SF);
843 }
844 
845 static GenericValue executeSelectInst(GenericValue Src1, GenericValue Src2,
846  GenericValue Src3, Type *Ty) {
847  GenericValue Dest;
848  if(Ty->isVectorTy()) {
849  assert(Src1.AggregateVal.size() == Src2.AggregateVal.size());
850  assert(Src2.AggregateVal.size() == Src3.AggregateVal.size());
851  Dest.AggregateVal.resize( Src1.AggregateVal.size() );
852  for (size_t i = 0; i < Src1.AggregateVal.size(); ++i)
853  Dest.AggregateVal[i] = (Src1.AggregateVal[i].IntVal == 0) ?
854  Src3.AggregateVal[i] : Src2.AggregateVal[i];
855  } else {
856  Dest = (Src1.IntVal == 0) ? Src3 : Src2;
857  }
858  return Dest;
859 }
860 
861 void Interpreter::visitSelectInst(SelectInst &I) {
862  ExecutionContext &SF = ECStack.back();
863  Type * Ty = I.getOperand(0)->getType();
864  GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
865  GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
866  GenericValue Src3 = getOperandValue(I.getOperand(2), SF);
867  GenericValue R = executeSelectInst(Src1, Src2, Src3, Ty);
868  SetValue(&I, R, SF);
869 }
870 
871 //===----------------------------------------------------------------------===//
872 // Terminator Instruction Implementations
873 //===----------------------------------------------------------------------===//
874 
875 void Interpreter::exitCalled(GenericValue GV) {
876  // runAtExitHandlers() assumes there are no stack frames, but
877  // if exit() was called, then it had a stack frame. Blow away
878  // the stack before interpreting atexit handlers.
879  ECStack.clear();
880  runAtExitHandlers();
881  exit(GV.IntVal.zextOrTrunc(32).getZExtValue());
882 }
883 
884 /// Pop the last stack frame off of ECStack and then copy the result
885 /// back into the result variable if we are not returning void. The
886 /// result variable may be the ExitValue, or the Value of the calling
887 /// CallInst if there was a previous stack frame. This method may
888 /// invalidate any ECStack iterators you have. This method also takes
889 /// care of switching to the normal destination BB, if we are returning
890 /// from an invoke.
891 ///
892 void Interpreter::popStackAndReturnValueToCaller(Type *RetTy,
893  GenericValue Result) {
894  // Pop the current stack frame.
895  ECStack.pop_back();
896 
897  if (ECStack.empty()) { // Finished main. Put result into exit code...
898  if (RetTy && !RetTy->isVoidTy()) { // Nonvoid return type?
899  ExitValue = Result; // Capture the exit value of the program
900  } else {
901  memset(&ExitValue.Untyped, 0, sizeof(ExitValue.Untyped));
902  }
903  } else {
904  // If we have a previous stack frame, and we have a previous call,
905  // fill in the return value...
906  ExecutionContext &CallingSF = ECStack.back();
907  if (CallingSF.Caller) {
908  // Save result...
909  if (!CallingSF.Caller->getType()->isVoidTy())
910  SetValue(CallingSF.Caller, Result, CallingSF);
911  if (InvokeInst *II = dyn_cast<InvokeInst>(CallingSF.Caller))
912  SwitchToNewBasicBlock (II->getNormalDest (), CallingSF);
913  CallingSF.Caller = nullptr; // We returned from the call...
914  }
915  }
916 }
917 
918 void Interpreter::visitReturnInst(ReturnInst &I) {
919  ExecutionContext &SF = ECStack.back();
920  Type *RetTy = Type::getVoidTy(I.getContext());
921  GenericValue Result;
922 
923  // Save away the return value... (if we are not 'ret void')
924  if (I.getNumOperands()) {
925  RetTy = I.getReturnValue()->getType();
926  Result = getOperandValue(I.getReturnValue(), SF);
927  }
928 
929  popStackAndReturnValueToCaller(RetTy, Result);
930 }
931 
932 void Interpreter::visitUnreachableInst(UnreachableInst &I) {
933  report_fatal_error("Program executed an 'unreachable' instruction!");
934 }
935 
936 void Interpreter::visitBranchInst(BranchInst &I) {
937  ExecutionContext &SF = ECStack.back();
938  BasicBlock *Dest;
939 
940  Dest = I.getSuccessor(0); // Uncond branches have a fixed dest...
941  if (!I.isUnconditional()) {
942  Value *Cond = I.getCondition();
943  if (getOperandValue(Cond, SF).IntVal == 0) // If false cond...
944  Dest = I.getSuccessor(1);
945  }
946  SwitchToNewBasicBlock(Dest, SF);
947 }
948 
949 void Interpreter::visitSwitchInst(SwitchInst &I) {
950  ExecutionContext &SF = ECStack.back();
951  Value* Cond = I.getCondition();
952  Type *ElTy = Cond->getType();
953  GenericValue CondVal = getOperandValue(Cond, SF);
954 
955  // Check to see if any of the cases match...
956  BasicBlock *Dest = nullptr;
957  for (auto Case : I.cases()) {
958  GenericValue CaseVal = getOperandValue(Case.getCaseValue(), SF);
959  if (executeICMP_EQ(CondVal, CaseVal, ElTy).IntVal != 0) {
960  Dest = cast<BasicBlock>(Case.getCaseSuccessor());
961  break;
962  }
963  }
964  if (!Dest) Dest = I.getDefaultDest(); // No cases matched: use default
965  SwitchToNewBasicBlock(Dest, SF);
966 }
967 
968 void Interpreter::visitIndirectBrInst(IndirectBrInst &I) {
969  ExecutionContext &SF = ECStack.back();
970  void *Dest = GVTOP(getOperandValue(I.getAddress(), SF));
971  SwitchToNewBasicBlock((BasicBlock*)Dest, SF);
972 }
973 
974 
975 // SwitchToNewBasicBlock - This method is used to jump to a new basic block.
976 // This function handles the actual updating of block and instruction iterators
977 // as well as execution of all of the PHI nodes in the destination block.
978 //
979 // This method does this because all of the PHI nodes must be executed
980 // atomically, reading their inputs before any of the results are updated. Not
981 // doing this can cause problems if the PHI nodes depend on other PHI nodes for
982 // their inputs. If the input PHI node is updated before it is read, incorrect
983 // results can happen. Thus we use a two phase approach.
984 //
985 void Interpreter::SwitchToNewBasicBlock(BasicBlock *Dest, ExecutionContext &SF){
986  BasicBlock *PrevBB = SF.CurBB; // Remember where we came from...
987  SF.CurBB = Dest; // Update CurBB to branch destination
988  SF.CurInst = SF.CurBB->begin(); // Update new instruction ptr...
989 
990  if (!isa<PHINode>(SF.CurInst)) return; // Nothing fancy to do
991 
992  // Loop over all of the PHI nodes in the current block, reading their inputs.
993  std::vector<GenericValue> ResultValues;
994 
995  for (; PHINode *PN = dyn_cast<PHINode>(SF.CurInst); ++SF.CurInst) {
996  // Search for the value corresponding to this previous bb...
997  int i = PN->getBasicBlockIndex(PrevBB);
998  assert(i != -1 && "PHINode doesn't contain entry for predecessor??");
999  Value *IncomingValue = PN->getIncomingValue(i);
1000 
1001  // Save the incoming value for this PHI node...
1002  ResultValues.push_back(getOperandValue(IncomingValue, SF));
1003  }
1004 
1005  // Now loop over all of the PHI nodes setting their values...
1006  SF.CurInst = SF.CurBB->begin();
1007  for (unsigned i = 0; isa<PHINode>(SF.CurInst); ++SF.CurInst, ++i) {
1008  PHINode *PN = cast<PHINode>(SF.CurInst);
1009  SetValue(PN, ResultValues[i], SF);
1010  }
1011 }
1012 
1013 //===----------------------------------------------------------------------===//
1014 // Memory Instruction Implementations
1015 //===----------------------------------------------------------------------===//
1016 
1017 void Interpreter::visitAllocaInst(AllocaInst &I) {
1018  ExecutionContext &SF = ECStack.back();
1019 
1020  Type *Ty = I.getAllocatedType(); // Type to be allocated
1021 
1022  // Get the number of elements being allocated by the array...
1023  unsigned NumElements =
1024  getOperandValue(I.getOperand(0), SF).IntVal.getZExtValue();
1025 
1026  unsigned TypeSize = (size_t)getDataLayout().getTypeAllocSize(Ty);
1027 
1028  // Avoid malloc-ing zero bytes, use max()...
1029  unsigned MemToAlloc = std::max(1U, NumElements * TypeSize);
1030 
1031  // Allocate enough memory to hold the type...
1032  void *Memory = safe_malloc(MemToAlloc);
1033 
1034  LLVM_DEBUG(dbgs() << "Allocated Type: " << *Ty << " (" << TypeSize
1035  << " bytes) x " << NumElements << " (Total: " << MemToAlloc
1036  << ") at " << uintptr_t(Memory) << '\n');
1037 
1038  GenericValue Result = PTOGV(Memory);
1039  assert(Result.PointerVal && "Null pointer returned by malloc!");
1040  SetValue(&I, Result, SF);
1041 
1042  if (I.getOpcode() == Instruction::Alloca)
1043  ECStack.back().Allocas.add(Memory);
1044 }
1045 
1046 // getElementOffset - The workhorse for getelementptr.
1047 //
1048 GenericValue Interpreter::executeGEPOperation(Value *Ptr, gep_type_iterator I,
1049  gep_type_iterator E,
1050  ExecutionContext &SF) {
1051  assert(Ptr->getType()->isPointerTy() &&
1052  "Cannot getElementOffset of a nonpointer type!");
1053 
1054  uint64_t Total = 0;
1055 
1056  for (; I != E; ++I) {
1057  if (StructType *STy = I.getStructTypeOrNull()) {
1058  const StructLayout *SLO = getDataLayout().getStructLayout(STy);
1059 
1060  const ConstantInt *CPU = cast<ConstantInt>(I.getOperand());
1061  unsigned Index = unsigned(CPU->getZExtValue());
1062 
1063  Total += SLO->getElementOffset(Index);
1064  } else {
1065  // Get the index number for the array... which must be long type...
1066  GenericValue IdxGV = getOperandValue(I.getOperand(), SF);
1067 
1068  int64_t Idx;
1069  unsigned BitWidth =
1070  cast<IntegerType>(I.getOperand()->getType())->getBitWidth();
1071  if (BitWidth == 32)
1072  Idx = (int64_t)(int32_t)IdxGV.IntVal.getZExtValue();
1073  else {
1074  assert(BitWidth == 64 && "Invalid index type for getelementptr");
1075  Idx = (int64_t)IdxGV.IntVal.getZExtValue();
1076  }
1077  Total += getDataLayout().getTypeAllocSize(I.getIndexedType()) * Idx;
1078  }
1079  }
1080 
1081  GenericValue Result;
1082  Result.PointerVal = ((char*)getOperandValue(Ptr, SF).PointerVal) + Total;
1083  LLVM_DEBUG(dbgs() << "GEP Index " << Total << " bytes.\n");
1084  return Result;
1085 }
1086 
1087 void Interpreter::visitGetElementPtrInst(GetElementPtrInst &I) {
1088  ExecutionContext &SF = ECStack.back();
1089  SetValue(&I, executeGEPOperation(I.getPointerOperand(),
1090  gep_type_begin(I), gep_type_end(I), SF), SF);
1091 }
1092 
1093 void Interpreter::visitLoadInst(LoadInst &I) {
1094  ExecutionContext &SF = ECStack.back();
1095  GenericValue SRC = getOperandValue(I.getPointerOperand(), SF);
1096  GenericValue *Ptr = (GenericValue*)GVTOP(SRC);
1097  GenericValue Result;
1098  LoadValueFromMemory(Result, Ptr, I.getType());
1099  SetValue(&I, Result, SF);
1100  if (I.isVolatile() && PrintVolatile)
1101  dbgs() << "Volatile load " << I;
1102 }
1103 
1104 void Interpreter::visitStoreInst(StoreInst &I) {
1105  ExecutionContext &SF = ECStack.back();
1106  GenericValue Val = getOperandValue(I.getOperand(0), SF);
1107  GenericValue SRC = getOperandValue(I.getPointerOperand(), SF);
1108  StoreValueToMemory(Val, (GenericValue *)GVTOP(SRC),
1109  I.getOperand(0)->getType());
1110  if (I.isVolatile() && PrintVolatile)
1111  dbgs() << "Volatile store: " << I;
1112 }
1113 
1114 //===----------------------------------------------------------------------===//
1115 // Miscellaneous Instruction Implementations
1116 //===----------------------------------------------------------------------===//
1117 
1118 void Interpreter::visitVAStartInst(VAStartInst &I) {
1119  ExecutionContext &SF = ECStack.back();
1120  GenericValue ArgIndex;
1121  ArgIndex.UIntPairVal.first = ECStack.size() - 1;
1122  ArgIndex.UIntPairVal.second = 0;
1123  SetValue(&I, ArgIndex, SF);
1124 }
1125 
1126 void Interpreter::visitVAEndInst(VAEndInst &I) {
1127  // va_end is a noop for the interpreter
1128 }
1129 
1130 void Interpreter::visitVACopyInst(VACopyInst &I) {
1131  ExecutionContext &SF = ECStack.back();
1132  SetValue(&I, getOperandValue(*I.arg_begin(), SF), SF);
1133 }
1134 
1135 void Interpreter::visitIntrinsicInst(IntrinsicInst &I) {
1136  ExecutionContext &SF = ECStack.back();
1137 
1138  // If it is an unknown intrinsic function, use the intrinsic lowering
1139  // class to transform it into hopefully tasty LLVM code.
1140  //
1141  BasicBlock::iterator Me(&I);
1142  BasicBlock *Parent = I.getParent();
1143  bool atBegin(Parent->begin() == Me);
1144  if (!atBegin)
1145  --Me;
1146  IL->LowerIntrinsicCall(&I);
1147 
1148  // Restore the CurInst pointer to the first instruction newly inserted, if
1149  // any.
1150  if (atBegin) {
1151  SF.CurInst = Parent->begin();
1152  } else {
1153  SF.CurInst = Me;
1154  ++SF.CurInst;
1155  }
1156 }
1157 
1158 void Interpreter::visitCallBase(CallBase &I) {
1159  ExecutionContext &SF = ECStack.back();
1160 
1161  SF.Caller = &I;
1162  std::vector<GenericValue> ArgVals;
1163  const unsigned NumArgs = SF.Caller->arg_size();
1164  ArgVals.reserve(NumArgs);
1165  for (Value *V : SF.Caller->args())
1166  ArgVals.push_back(getOperandValue(V, SF));
1167 
1168  // To handle indirect calls, we must get the pointer value from the argument
1169  // and treat it as a function pointer.
1170  GenericValue SRC = getOperandValue(SF.Caller->getCalledOperand(), SF);
1171  callFunction((Function*)GVTOP(SRC), ArgVals);
1172 }
1173 
1174 // auxiliary function for shift operations
1175 static unsigned getShiftAmount(uint64_t orgShiftAmount,
1176  llvm::APInt valueToShift) {
1177  unsigned valueWidth = valueToShift.getBitWidth();
1178  if (orgShiftAmount < (uint64_t)valueWidth)
1179  return orgShiftAmount;
1180  // according to the llvm documentation, if orgShiftAmount > valueWidth,
1181  // the result is undfeined. but we do shift by this rule:
1182  return (NextPowerOf2(valueWidth-1) - 1) & orgShiftAmount;
1183 }
1184 
1185 
1186 void Interpreter::visitShl(BinaryOperator &I) {
1187  ExecutionContext &SF = ECStack.back();
1188  GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1189  GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1190  GenericValue Dest;
1191  Type *Ty = I.getType();
1192 
1193  if (Ty->isVectorTy()) {
1194  uint32_t src1Size = uint32_t(Src1.AggregateVal.size());
1195  assert(src1Size == Src2.AggregateVal.size());
1196  for (unsigned i = 0; i < src1Size; i++) {
1197  GenericValue Result;
1198  uint64_t shiftAmount = Src2.AggregateVal[i].IntVal.getZExtValue();
1199  llvm::APInt valueToShift = Src1.AggregateVal[i].IntVal;
1200  Result.IntVal = valueToShift.shl(getShiftAmount(shiftAmount, valueToShift));
1201  Dest.AggregateVal.push_back(Result);
1202  }
1203  } else {
1204  // scalar
1205  uint64_t shiftAmount = Src2.IntVal.getZExtValue();
1206  llvm::APInt valueToShift = Src1.IntVal;
1207  Dest.IntVal = valueToShift.shl(getShiftAmount(shiftAmount, valueToShift));
1208  }
1209 
1210  SetValue(&I, Dest, SF);
1211 }
1212 
1213 void Interpreter::visitLShr(BinaryOperator &I) {
1214  ExecutionContext &SF = ECStack.back();
1215  GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1216  GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1217  GenericValue Dest;
1218  Type *Ty = I.getType();
1219 
1220  if (Ty->isVectorTy()) {
1221  uint32_t src1Size = uint32_t(Src1.AggregateVal.size());
1222  assert(src1Size == Src2.AggregateVal.size());
1223  for (unsigned i = 0; i < src1Size; i++) {
1224  GenericValue Result;
1225  uint64_t shiftAmount = Src2.AggregateVal[i].IntVal.getZExtValue();
1226  llvm::APInt valueToShift = Src1.AggregateVal[i].IntVal;
1227  Result.IntVal = valueToShift.lshr(getShiftAmount(shiftAmount, valueToShift));
1228  Dest.AggregateVal.push_back(Result);
1229  }
1230  } else {
1231  // scalar
1232  uint64_t shiftAmount = Src2.IntVal.getZExtValue();
1233  llvm::APInt valueToShift = Src1.IntVal;
1234  Dest.IntVal = valueToShift.lshr(getShiftAmount(shiftAmount, valueToShift));
1235  }
1236 
1237  SetValue(&I, Dest, SF);
1238 }
1239 
1240 void Interpreter::visitAShr(BinaryOperator &I) {
1241  ExecutionContext &SF = ECStack.back();
1242  GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1243  GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1244  GenericValue Dest;
1245  Type *Ty = I.getType();
1246 
1247  if (Ty->isVectorTy()) {
1248  size_t src1Size = Src1.AggregateVal.size();
1249  assert(src1Size == Src2.AggregateVal.size());
1250  for (unsigned i = 0; i < src1Size; i++) {
1251  GenericValue Result;
1252  uint64_t shiftAmount = Src2.AggregateVal[i].IntVal.getZExtValue();
1253  llvm::APInt valueToShift = Src1.AggregateVal[i].IntVal;
1254  Result.IntVal = valueToShift.ashr(getShiftAmount(shiftAmount, valueToShift));
1255  Dest.AggregateVal.push_back(Result);
1256  }
1257  } else {
1258  // scalar
1259  uint64_t shiftAmount = Src2.IntVal.getZExtValue();
1260  llvm::APInt valueToShift = Src1.IntVal;
1261  Dest.IntVal = valueToShift.ashr(getShiftAmount(shiftAmount, valueToShift));
1262  }
1263 
1264  SetValue(&I, Dest, SF);
1265 }
1266 
1267 GenericValue Interpreter::executeTruncInst(Value *SrcVal, Type *DstTy,
1268  ExecutionContext &SF) {
1269  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1270  Type *SrcTy = SrcVal->getType();
1271  if (SrcTy->isVectorTy()) {
1272  Type *DstVecTy = DstTy->getScalarType();
1273  unsigned DBitWidth = cast<IntegerType>(DstVecTy)->getBitWidth();
1274  unsigned NumElts = Src.AggregateVal.size();
1275  // the sizes of src and dst vectors must be equal
1276  Dest.AggregateVal.resize(NumElts);
1277  for (unsigned i = 0; i < NumElts; i++)
1278  Dest.AggregateVal[i].IntVal = Src.AggregateVal[i].IntVal.trunc(DBitWidth);
1279  } else {
1280  IntegerType *DITy = cast<IntegerType>(DstTy);
1281  unsigned DBitWidth = DITy->getBitWidth();
1282  Dest.IntVal = Src.IntVal.trunc(DBitWidth);
1283  }
1284  return Dest;
1285 }
1286 
1287 GenericValue Interpreter::executeSExtInst(Value *SrcVal, Type *DstTy,
1288  ExecutionContext &SF) {
1289  Type *SrcTy = SrcVal->getType();
1290  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1291  if (SrcTy->isVectorTy()) {
1292  Type *DstVecTy = DstTy->getScalarType();
1293  unsigned DBitWidth = cast<IntegerType>(DstVecTy)->getBitWidth();
1294  unsigned size = Src.AggregateVal.size();
1295  // the sizes of src and dst vectors must be equal.
1296  Dest.AggregateVal.resize(size);
1297  for (unsigned i = 0; i < size; i++)
1298  Dest.AggregateVal[i].IntVal = Src.AggregateVal[i].IntVal.sext(DBitWidth);
1299  } else {
1300  auto *DITy = cast<IntegerType>(DstTy);
1301  unsigned DBitWidth = DITy->getBitWidth();
1302  Dest.IntVal = Src.IntVal.sext(DBitWidth);
1303  }
1304  return Dest;
1305 }
1306 
1307 GenericValue Interpreter::executeZExtInst(Value *SrcVal, Type *DstTy,
1308  ExecutionContext &SF) {
1309  Type *SrcTy = SrcVal->getType();
1310  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1311  if (SrcTy->isVectorTy()) {
1312  Type *DstVecTy = DstTy->getScalarType();
1313  unsigned DBitWidth = cast<IntegerType>(DstVecTy)->getBitWidth();
1314 
1315  unsigned size = Src.AggregateVal.size();
1316  // the sizes of src and dst vectors must be equal.
1317  Dest.AggregateVal.resize(size);
1318  for (unsigned i = 0; i < size; i++)
1319  Dest.AggregateVal[i].IntVal = Src.AggregateVal[i].IntVal.zext(DBitWidth);
1320  } else {
1321  auto *DITy = cast<IntegerType>(DstTy);
1322  unsigned DBitWidth = DITy->getBitWidth();
1323  Dest.IntVal = Src.IntVal.zext(DBitWidth);
1324  }
1325  return Dest;
1326 }
1327 
1328 GenericValue Interpreter::executeFPTruncInst(Value *SrcVal, Type *DstTy,
1329  ExecutionContext &SF) {
1330  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1331 
1332  if (isa<VectorType>(SrcVal->getType())) {
1333  assert(SrcVal->getType()->getScalarType()->isDoubleTy() &&
1334  DstTy->getScalarType()->isFloatTy() &&
1335  "Invalid FPTrunc instruction");
1336 
1337  unsigned size = Src.AggregateVal.size();
1338  // the sizes of src and dst vectors must be equal.
1339  Dest.AggregateVal.resize(size);
1340  for (unsigned i = 0; i < size; i++)
1341  Dest.AggregateVal[i].FloatVal = (float)Src.AggregateVal[i].DoubleVal;
1342  } else {
1343  assert(SrcVal->getType()->isDoubleTy() && DstTy->isFloatTy() &&
1344  "Invalid FPTrunc instruction");
1345  Dest.FloatVal = (float)Src.DoubleVal;
1346  }
1347 
1348  return Dest;
1349 }
1350 
1351 GenericValue Interpreter::executeFPExtInst(Value *SrcVal, Type *DstTy,
1352  ExecutionContext &SF) {
1353  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1354 
1355  if (isa<VectorType>(SrcVal->getType())) {
1356  assert(SrcVal->getType()->getScalarType()->isFloatTy() &&
1357  DstTy->getScalarType()->isDoubleTy() && "Invalid FPExt instruction");
1358 
1359  unsigned size = Src.AggregateVal.size();
1360  // the sizes of src and dst vectors must be equal.
1361  Dest.AggregateVal.resize(size);
1362  for (unsigned i = 0; i < size; i++)
1363  Dest.AggregateVal[i].DoubleVal = (double)Src.AggregateVal[i].FloatVal;
1364  } else {
1365  assert(SrcVal->getType()->isFloatTy() && DstTy->isDoubleTy() &&
1366  "Invalid FPExt instruction");
1367  Dest.DoubleVal = (double)Src.FloatVal;
1368  }
1369 
1370  return Dest;
1371 }
1372 
1373 GenericValue Interpreter::executeFPToUIInst(Value *SrcVal, Type *DstTy,
1374  ExecutionContext &SF) {
1375  Type *SrcTy = SrcVal->getType();
1376  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1377 
1378  if (isa<VectorType>(SrcTy)) {
1379  Type *DstVecTy = DstTy->getScalarType();
1380  Type *SrcVecTy = SrcTy->getScalarType();
1381  uint32_t DBitWidth = cast<IntegerType>(DstVecTy)->getBitWidth();
1382  unsigned size = Src.AggregateVal.size();
1383  // the sizes of src and dst vectors must be equal.
1384  Dest.AggregateVal.resize(size);
1385 
1386  if (SrcVecTy->getTypeID() == Type::FloatTyID) {
1387  assert(SrcVecTy->isFloatingPointTy() && "Invalid FPToUI instruction");
1388  for (unsigned i = 0; i < size; i++)
1389  Dest.AggregateVal[i].IntVal = APIntOps::RoundFloatToAPInt(
1390  Src.AggregateVal[i].FloatVal, DBitWidth);
1391  } else {
1392  for (unsigned i = 0; i < size; i++)
1393  Dest.AggregateVal[i].IntVal = APIntOps::RoundDoubleToAPInt(
1394  Src.AggregateVal[i].DoubleVal, DBitWidth);
1395  }
1396  } else {
1397  // scalar
1398  uint32_t DBitWidth = cast<IntegerType>(DstTy)->getBitWidth();
1399  assert(SrcTy->isFloatingPointTy() && "Invalid FPToUI instruction");
1400 
1401  if (SrcTy->getTypeID() == Type::FloatTyID)
1402  Dest.IntVal = APIntOps::RoundFloatToAPInt(Src.FloatVal, DBitWidth);
1403  else {
1404  Dest.IntVal = APIntOps::RoundDoubleToAPInt(Src.DoubleVal, DBitWidth);
1405  }
1406  }
1407 
1408  return Dest;
1409 }
1410 
1411 GenericValue Interpreter::executeFPToSIInst(Value *SrcVal, Type *DstTy,
1412  ExecutionContext &SF) {
1413  Type *SrcTy = SrcVal->getType();
1414  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1415 
1416  if (isa<VectorType>(SrcTy)) {
1417  Type *DstVecTy = DstTy->getScalarType();
1418  Type *SrcVecTy = SrcTy->getScalarType();
1419  uint32_t DBitWidth = cast<IntegerType>(DstVecTy)->getBitWidth();
1420  unsigned size = Src.AggregateVal.size();
1421  // the sizes of src and dst vectors must be equal
1422  Dest.AggregateVal.resize(size);
1423 
1424  if (SrcVecTy->getTypeID() == Type::FloatTyID) {
1425  assert(SrcVecTy->isFloatingPointTy() && "Invalid FPToSI instruction");
1426  for (unsigned i = 0; i < size; i++)
1427  Dest.AggregateVal[i].IntVal = APIntOps::RoundFloatToAPInt(
1428  Src.AggregateVal[i].FloatVal, DBitWidth);
1429  } else {
1430  for (unsigned i = 0; i < size; i++)
1431  Dest.AggregateVal[i].IntVal = APIntOps::RoundDoubleToAPInt(
1432  Src.AggregateVal[i].DoubleVal, DBitWidth);
1433  }
1434  } else {
1435  // scalar
1436  unsigned DBitWidth = cast<IntegerType>(DstTy)->getBitWidth();
1437  assert(SrcTy->isFloatingPointTy() && "Invalid FPToSI instruction");
1438 
1439  if (SrcTy->getTypeID() == Type::FloatTyID)
1440  Dest.IntVal = APIntOps::RoundFloatToAPInt(Src.FloatVal, DBitWidth);
1441  else {
1442  Dest.IntVal = APIntOps::RoundDoubleToAPInt(Src.DoubleVal, DBitWidth);
1443  }
1444  }
1445  return Dest;
1446 }
1447 
1448 GenericValue Interpreter::executeUIToFPInst(Value *SrcVal, Type *DstTy,
1449  ExecutionContext &SF) {
1450  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1451 
1452  if (isa<VectorType>(SrcVal->getType())) {
1453  Type *DstVecTy = DstTy->getScalarType();
1454  unsigned size = Src.AggregateVal.size();
1455  // the sizes of src and dst vectors must be equal
1456  Dest.AggregateVal.resize(size);
1457 
1458  if (DstVecTy->getTypeID() == Type::FloatTyID) {
1459  assert(DstVecTy->isFloatingPointTy() && "Invalid UIToFP instruction");
1460  for (unsigned i = 0; i < size; i++)
1461  Dest.AggregateVal[i].FloatVal =
1462  APIntOps::RoundAPIntToFloat(Src.AggregateVal[i].IntVal);
1463  } else {
1464  for (unsigned i = 0; i < size; i++)
1465  Dest.AggregateVal[i].DoubleVal =
1466  APIntOps::RoundAPIntToDouble(Src.AggregateVal[i].IntVal);
1467  }
1468  } else {
1469  // scalar
1470  assert(DstTy->isFloatingPointTy() && "Invalid UIToFP instruction");
1471  if (DstTy->getTypeID() == Type::FloatTyID)
1472  Dest.FloatVal = APIntOps::RoundAPIntToFloat(Src.IntVal);
1473  else {
1474  Dest.DoubleVal = APIntOps::RoundAPIntToDouble(Src.IntVal);
1475  }
1476  }
1477  return Dest;
1478 }
1479 
1480 GenericValue Interpreter::executeSIToFPInst(Value *SrcVal, Type *DstTy,
1481  ExecutionContext &SF) {
1482  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1483 
1484  if (isa<VectorType>(SrcVal->getType())) {
1485  Type *DstVecTy = DstTy->getScalarType();
1486  unsigned size = Src.AggregateVal.size();
1487  // the sizes of src and dst vectors must be equal
1488  Dest.AggregateVal.resize(size);
1489 
1490  if (DstVecTy->getTypeID() == Type::FloatTyID) {
1491  assert(DstVecTy->isFloatingPointTy() && "Invalid SIToFP instruction");
1492  for (unsigned i = 0; i < size; i++)
1493  Dest.AggregateVal[i].FloatVal =
1494  APIntOps::RoundSignedAPIntToFloat(Src.AggregateVal[i].IntVal);
1495  } else {
1496  for (unsigned i = 0; i < size; i++)
1497  Dest.AggregateVal[i].DoubleVal =
1498  APIntOps::RoundSignedAPIntToDouble(Src.AggregateVal[i].IntVal);
1499  }
1500  } else {
1501  // scalar
1502  assert(DstTy->isFloatingPointTy() && "Invalid SIToFP instruction");
1503 
1504  if (DstTy->getTypeID() == Type::FloatTyID)
1505  Dest.FloatVal = APIntOps::RoundSignedAPIntToFloat(Src.IntVal);
1506  else {
1507  Dest.DoubleVal = APIntOps::RoundSignedAPIntToDouble(Src.IntVal);
1508  }
1509  }
1510 
1511  return Dest;
1512 }
1513 
1514 GenericValue Interpreter::executePtrToIntInst(Value *SrcVal, Type *DstTy,
1515  ExecutionContext &SF) {
1516  uint32_t DBitWidth = cast<IntegerType>(DstTy)->getBitWidth();
1517  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1518  assert(SrcVal->getType()->isPointerTy() && "Invalid PtrToInt instruction");
1519 
1520  Dest.IntVal = APInt(DBitWidth, (intptr_t) Src.PointerVal);
1521  return Dest;
1522 }
1523 
1524 GenericValue Interpreter::executeIntToPtrInst(Value *SrcVal, Type *DstTy,
1525  ExecutionContext &SF) {
1526  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1527  assert(DstTy->isPointerTy() && "Invalid PtrToInt instruction");
1528 
1529  uint32_t PtrSize = getDataLayout().getPointerSizeInBits();
1530  if (PtrSize != Src.IntVal.getBitWidth())
1531  Src.IntVal = Src.IntVal.zextOrTrunc(PtrSize);
1532 
1533  Dest.PointerVal = PointerTy(intptr_t(Src.IntVal.getZExtValue()));
1534  return Dest;
1535 }
1536 
1537 GenericValue Interpreter::executeBitCastInst(Value *SrcVal, Type *DstTy,
1538  ExecutionContext &SF) {
1539 
1540  // This instruction supports bitwise conversion of vectors to integers and
1541  // to vectors of other types (as long as they have the same size)
1542  Type *SrcTy = SrcVal->getType();
1543  GenericValue Dest, Src = getOperandValue(SrcVal, SF);
1544 
1545  if (isa<VectorType>(SrcTy) || isa<VectorType>(DstTy)) {
1546  // vector src bitcast to vector dst or vector src bitcast to scalar dst or
1547  // scalar src bitcast to vector dst
1548  bool isLittleEndian = getDataLayout().isLittleEndian();
1549  GenericValue TempDst, TempSrc, SrcVec;
1550  Type *SrcElemTy;
1551  Type *DstElemTy;
1552  unsigned SrcBitSize;
1553  unsigned DstBitSize;
1554  unsigned SrcNum;
1555  unsigned DstNum;
1556 
1557  if (isa<VectorType>(SrcTy)) {
1558  SrcElemTy = SrcTy->getScalarType();
1559  SrcBitSize = SrcTy->getScalarSizeInBits();
1560  SrcNum = Src.AggregateVal.size();
1561  SrcVec = Src;
1562  } else {
1563  // if src is scalar value, make it vector <1 x type>
1564  SrcElemTy = SrcTy;
1565  SrcBitSize = SrcTy->getPrimitiveSizeInBits();
1566  SrcNum = 1;
1567  SrcVec.AggregateVal.push_back(Src);
1568  }
1569 
1570  if (isa<VectorType>(DstTy)) {
1571  DstElemTy = DstTy->getScalarType();
1572  DstBitSize = DstTy->getScalarSizeInBits();
1573  DstNum = (SrcNum * SrcBitSize) / DstBitSize;
1574  } else {
1575  DstElemTy = DstTy;
1576  DstBitSize = DstTy->getPrimitiveSizeInBits();
1577  DstNum = 1;
1578  }
1579 
1580  if (SrcNum * SrcBitSize != DstNum * DstBitSize)
1581  llvm_unreachable("Invalid BitCast");
1582 
1583  // If src is floating point, cast to integer first.
1584  TempSrc.AggregateVal.resize(SrcNum);
1585  if (SrcElemTy->isFloatTy()) {
1586  for (unsigned i = 0; i < SrcNum; i++)
1587  TempSrc.AggregateVal[i].IntVal =
1588  APInt::floatToBits(SrcVec.AggregateVal[i].FloatVal);
1589 
1590  } else if (SrcElemTy->isDoubleTy()) {
1591  for (unsigned i = 0; i < SrcNum; i++)
1592  TempSrc.AggregateVal[i].IntVal =
1593  APInt::doubleToBits(SrcVec.AggregateVal[i].DoubleVal);
1594  } else if (SrcElemTy->isIntegerTy()) {
1595  for (unsigned i = 0; i < SrcNum; i++)
1596  TempSrc.AggregateVal[i].IntVal = SrcVec.AggregateVal[i].IntVal;
1597  } else {
1598  // Pointers are not allowed as the element type of vector.
1599  llvm_unreachable("Invalid Bitcast");
1600  }
1601 
1602  // now TempSrc is integer type vector
1603  if (DstNum < SrcNum) {
1604  // Example: bitcast <4 x i32> <i32 0, i32 1, i32 2, i32 3> to <2 x i64>
1605  unsigned Ratio = SrcNum / DstNum;
1606  unsigned SrcElt = 0;
1607  for (unsigned i = 0; i < DstNum; i++) {
1608  GenericValue Elt;
1609  Elt.IntVal = 0;
1610  Elt.IntVal = Elt.IntVal.zext(DstBitSize);
1611  unsigned ShiftAmt = isLittleEndian ? 0 : SrcBitSize * (Ratio - 1);
1612  for (unsigned j = 0; j < Ratio; j++) {
1613  APInt Tmp;
1614  Tmp = Tmp.zext(SrcBitSize);
1615  Tmp = TempSrc.AggregateVal[SrcElt++].IntVal;
1616  Tmp = Tmp.zext(DstBitSize);
1617  Tmp <<= ShiftAmt;
1618  ShiftAmt += isLittleEndian ? SrcBitSize : -SrcBitSize;
1619  Elt.IntVal |= Tmp;
1620  }
1621  TempDst.AggregateVal.push_back(Elt);
1622  }
1623  } else {
1624  // Example: bitcast <2 x i64> <i64 0, i64 1> to <4 x i32>
1625  unsigned Ratio = DstNum / SrcNum;
1626  for (unsigned i = 0; i < SrcNum; i++) {
1627  unsigned ShiftAmt = isLittleEndian ? 0 : DstBitSize * (Ratio - 1);
1628  for (unsigned j = 0; j < Ratio; j++) {
1629  GenericValue Elt;
1630  Elt.IntVal = Elt.IntVal.zext(SrcBitSize);
1631  Elt.IntVal = TempSrc.AggregateVal[i].IntVal;
1632  Elt.IntVal.lshrInPlace(ShiftAmt);
1633  // it could be DstBitSize == SrcBitSize, so check it
1634  if (DstBitSize < SrcBitSize)
1635  Elt.IntVal = Elt.IntVal.trunc(DstBitSize);
1636  ShiftAmt += isLittleEndian ? DstBitSize : -DstBitSize;
1637  TempDst.AggregateVal.push_back(Elt);
1638  }
1639  }
1640  }
1641 
1642  // convert result from integer to specified type
1643  if (isa<VectorType>(DstTy)) {
1644  if (DstElemTy->isDoubleTy()) {
1645  Dest.AggregateVal.resize(DstNum);
1646  for (unsigned i = 0; i < DstNum; i++)
1647  Dest.AggregateVal[i].DoubleVal =
1648  TempDst.AggregateVal[i].IntVal.bitsToDouble();
1649  } else if (DstElemTy->isFloatTy()) {
1650  Dest.AggregateVal.resize(DstNum);
1651  for (unsigned i = 0; i < DstNum; i++)
1652  Dest.AggregateVal[i].FloatVal =
1653  TempDst.AggregateVal[i].IntVal.bitsToFloat();
1654  } else {
1655  Dest = TempDst;
1656  }
1657  } else {
1658  if (DstElemTy->isDoubleTy())
1659  Dest.DoubleVal = TempDst.AggregateVal[0].IntVal.bitsToDouble();
1660  else if (DstElemTy->isFloatTy()) {
1661  Dest.FloatVal = TempDst.AggregateVal[0].IntVal.bitsToFloat();
1662  } else {
1663  Dest.IntVal = TempDst.AggregateVal[0].IntVal;
1664  }
1665  }
1666  } else { // if (isa<VectorType>(SrcTy)) || isa<VectorType>(DstTy))
1667 
1668  // scalar src bitcast to scalar dst
1669  if (DstTy->isPointerTy()) {
1670  assert(SrcTy->isPointerTy() && "Invalid BitCast");
1671  Dest.PointerVal = Src.PointerVal;
1672  } else if (DstTy->isIntegerTy()) {
1673  if (SrcTy->isFloatTy())
1674  Dest.IntVal = APInt::floatToBits(Src.FloatVal);
1675  else if (SrcTy->isDoubleTy()) {
1676  Dest.IntVal = APInt::doubleToBits(Src.DoubleVal);
1677  } else if (SrcTy->isIntegerTy()) {
1678  Dest.IntVal = Src.IntVal;
1679  } else {
1680  llvm_unreachable("Invalid BitCast");
1681  }
1682  } else if (DstTy->isFloatTy()) {
1683  if (SrcTy->isIntegerTy())
1684  Dest.FloatVal = Src.IntVal.bitsToFloat();
1685  else {
1686  Dest.FloatVal = Src.FloatVal;
1687  }
1688  } else if (DstTy->isDoubleTy()) {
1689  if (SrcTy->isIntegerTy())
1690  Dest.DoubleVal = Src.IntVal.bitsToDouble();
1691  else {
1692  Dest.DoubleVal = Src.DoubleVal;
1693  }
1694  } else {
1695  llvm_unreachable("Invalid Bitcast");
1696  }
1697  }
1698 
1699  return Dest;
1700 }
1701 
1702 void Interpreter::visitTruncInst(TruncInst &I) {
1703  ExecutionContext &SF = ECStack.back();
1704  SetValue(&I, executeTruncInst(I.getOperand(0), I.getType(), SF), SF);
1705 }
1706 
1707 void Interpreter::visitSExtInst(SExtInst &I) {
1708  ExecutionContext &SF = ECStack.back();
1709  SetValue(&I, executeSExtInst(I.getOperand(0), I.getType(), SF), SF);
1710 }
1711 
1712 void Interpreter::visitZExtInst(ZExtInst &I) {
1713  ExecutionContext &SF = ECStack.back();
1714  SetValue(&I, executeZExtInst(I.getOperand(0), I.getType(), SF), SF);
1715 }
1716 
1717 void Interpreter::visitFPTruncInst(FPTruncInst &I) {
1718  ExecutionContext &SF = ECStack.back();
1719  SetValue(&I, executeFPTruncInst(I.getOperand(0), I.getType(), SF), SF);
1720 }
1721 
1722 void Interpreter::visitFPExtInst(FPExtInst &I) {
1723  ExecutionContext &SF = ECStack.back();
1724  SetValue(&I, executeFPExtInst(I.getOperand(0), I.getType(), SF), SF);
1725 }
1726 
1727 void Interpreter::visitUIToFPInst(UIToFPInst &I) {
1728  ExecutionContext &SF = ECStack.back();
1729  SetValue(&I, executeUIToFPInst(I.getOperand(0), I.getType(), SF), SF);
1730 }
1731 
1732 void Interpreter::visitSIToFPInst(SIToFPInst &I) {
1733  ExecutionContext &SF = ECStack.back();
1734  SetValue(&I, executeSIToFPInst(I.getOperand(0), I.getType(), SF), SF);
1735 }
1736 
1737 void Interpreter::visitFPToUIInst(FPToUIInst &I) {
1738  ExecutionContext &SF = ECStack.back();
1739  SetValue(&I, executeFPToUIInst(I.getOperand(0), I.getType(), SF), SF);
1740 }
1741 
1742 void Interpreter::visitFPToSIInst(FPToSIInst &I) {
1743  ExecutionContext &SF = ECStack.back();
1744  SetValue(&I, executeFPToSIInst(I.getOperand(0), I.getType(), SF), SF);
1745 }
1746 
1747 void Interpreter::visitPtrToIntInst(PtrToIntInst &I) {
1748  ExecutionContext &SF = ECStack.back();
1749  SetValue(&I, executePtrToIntInst(I.getOperand(0), I.getType(), SF), SF);
1750 }
1751 
1752 void Interpreter::visitIntToPtrInst(IntToPtrInst &I) {
1753  ExecutionContext &SF = ECStack.back();
1754  SetValue(&I, executeIntToPtrInst(I.getOperand(0), I.getType(), SF), SF);
1755 }
1756 
1757 void Interpreter::visitBitCastInst(BitCastInst &I) {
1758  ExecutionContext &SF = ECStack.back();
1759  SetValue(&I, executeBitCastInst(I.getOperand(0), I.getType(), SF), SF);
1760 }
1761 
1762 #define IMPLEMENT_VAARG(TY) \
1763  case Type::TY##TyID: Dest.TY##Val = Src.TY##Val; break
1764 
1765 void Interpreter::visitVAArgInst(VAArgInst &I) {
1766  ExecutionContext &SF = ECStack.back();
1767 
1768  // Get the incoming valist parameter. LLI treats the valist as a
1769  // (ec-stack-depth var-arg-index) pair.
1770  GenericValue VAList = getOperandValue(I.getOperand(0), SF);
1771  GenericValue Dest;
1772  GenericValue Src = ECStack[VAList.UIntPairVal.first]
1773  .VarArgs[VAList.UIntPairVal.second];
1774  Type *Ty = I.getType();
1775  switch (Ty->getTypeID()) {
1776  case Type::IntegerTyID:
1777  Dest.IntVal = Src.IntVal;
1778  break;
1779  IMPLEMENT_VAARG(Pointer);
1780  IMPLEMENT_VAARG(Float);
1781  IMPLEMENT_VAARG(Double);
1782  default:
1783  dbgs() << "Unhandled dest type for vaarg instruction: " << *Ty << "\n";
1784  llvm_unreachable(nullptr);
1785  }
1786 
1787  // Set the Value of this Instruction.
1788  SetValue(&I, Dest, SF);
1789 
1790  // Move the pointer to the next vararg.
1791  ++VAList.UIntPairVal.second;
1792 }
1793 
1794 void Interpreter::visitExtractElementInst(ExtractElementInst &I) {
1795  ExecutionContext &SF = ECStack.back();
1796  GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1797  GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1798  GenericValue Dest;
1799 
1800  Type *Ty = I.getType();
1801  const unsigned indx = unsigned(Src2.IntVal.getZExtValue());
1802 
1803  if(Src1.AggregateVal.size() > indx) {
1804  switch (Ty->getTypeID()) {
1805  default:
1806  dbgs() << "Unhandled destination type for extractelement instruction: "
1807  << *Ty << "\n";
1808  llvm_unreachable(nullptr);
1809  break;
1810  case Type::IntegerTyID:
1811  Dest.IntVal = Src1.AggregateVal[indx].IntVal;
1812  break;
1813  case Type::FloatTyID:
1814  Dest.FloatVal = Src1.AggregateVal[indx].FloatVal;
1815  break;
1816  case Type::DoubleTyID:
1817  Dest.DoubleVal = Src1.AggregateVal[indx].DoubleVal;
1818  break;
1819  }
1820  } else {
1821  dbgs() << "Invalid index in extractelement instruction\n";
1822  }
1823 
1824  SetValue(&I, Dest, SF);
1825 }
1826 
1827 void Interpreter::visitInsertElementInst(InsertElementInst &I) {
1828  ExecutionContext &SF = ECStack.back();
1829  VectorType *Ty = cast<VectorType>(I.getType());
1830 
1831  GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1832  GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1833  GenericValue Src3 = getOperandValue(I.getOperand(2), SF);
1834  GenericValue Dest;
1835 
1836  Type *TyContained = Ty->getElementType();
1837 
1838  const unsigned indx = unsigned(Src3.IntVal.getZExtValue());
1839  Dest.AggregateVal = Src1.AggregateVal;
1840 
1841  if(Src1.AggregateVal.size() <= indx)
1842  llvm_unreachable("Invalid index in insertelement instruction");
1843  switch (TyContained->getTypeID()) {
1844  default:
1845  llvm_unreachable("Unhandled dest type for insertelement instruction");
1846  case Type::IntegerTyID:
1847  Dest.AggregateVal[indx].IntVal = Src2.IntVal;
1848  break;
1849  case Type::FloatTyID:
1850  Dest.AggregateVal[indx].FloatVal = Src2.FloatVal;
1851  break;
1852  case Type::DoubleTyID:
1853  Dest.AggregateVal[indx].DoubleVal = Src2.DoubleVal;
1854  break;
1855  }
1856  SetValue(&I, Dest, SF);
1857 }
1858 
1859 void Interpreter::visitShuffleVectorInst(ShuffleVectorInst &I){
1860  ExecutionContext &SF = ECStack.back();
1861 
1862  VectorType *Ty = cast<VectorType>(I.getType());
1863 
1864  GenericValue Src1 = getOperandValue(I.getOperand(0), SF);
1865  GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1866  GenericValue Dest;
1867 
1868  // There is no need to check types of src1 and src2, because the compiled
1869  // bytecode can't contain different types for src1 and src2 for a
1870  // shufflevector instruction.
1871 
1872  Type *TyContained = Ty->getElementType();
1873  unsigned src1Size = (unsigned)Src1.AggregateVal.size();
1874  unsigned src2Size = (unsigned)Src2.AggregateVal.size();
1875  unsigned src3Size = I.getShuffleMask().size();
1876 
1877  Dest.AggregateVal.resize(src3Size);
1878 
1879  switch (TyContained->getTypeID()) {
1880  default:
1881  llvm_unreachable("Unhandled dest type for insertelement instruction");
1882  break;
1883  case Type::IntegerTyID:
1884  for( unsigned i=0; i<src3Size; i++) {
1885  unsigned j = std::max(0, I.getMaskValue(i));
1886  if(j < src1Size)
1887  Dest.AggregateVal[i].IntVal = Src1.AggregateVal[j].IntVal;
1888  else if(j < src1Size + src2Size)
1889  Dest.AggregateVal[i].IntVal = Src2.AggregateVal[j-src1Size].IntVal;
1890  else
1891  // The selector may not be greater than sum of lengths of first and
1892  // second operands and llasm should not allow situation like
1893  // %tmp = shufflevector <2 x i32> <i32 3, i32 4>, <2 x i32> undef,
1894  // <2 x i32> < i32 0, i32 5 >,
1895  // where i32 5 is invalid, but let it be additional check here:
1896  llvm_unreachable("Invalid mask in shufflevector instruction");
1897  }
1898  break;
1899  case Type::FloatTyID:
1900  for( unsigned i=0; i<src3Size; i++) {
1901  unsigned j = std::max(0, I.getMaskValue(i));
1902  if(j < src1Size)
1903  Dest.AggregateVal[i].FloatVal = Src1.AggregateVal[j].FloatVal;
1904  else if(j < src1Size + src2Size)
1905  Dest.AggregateVal[i].FloatVal = Src2.AggregateVal[j-src1Size].FloatVal;
1906  else
1907  llvm_unreachable("Invalid mask in shufflevector instruction");
1908  }
1909  break;
1910  case Type::DoubleTyID:
1911  for( unsigned i=0; i<src3Size; i++) {
1912  unsigned j = std::max(0, I.getMaskValue(i));
1913  if(j < src1Size)
1914  Dest.AggregateVal[i].DoubleVal = Src1.AggregateVal[j].DoubleVal;
1915  else if(j < src1Size + src2Size)
1916  Dest.AggregateVal[i].DoubleVal =
1917  Src2.AggregateVal[j-src1Size].DoubleVal;
1918  else
1919  llvm_unreachable("Invalid mask in shufflevector instruction");
1920  }
1921  break;
1922  }
1923  SetValue(&I, Dest, SF);
1924 }
1925 
1926 void Interpreter::visitExtractValueInst(ExtractValueInst &I) {
1927  ExecutionContext &SF = ECStack.back();
1928  Value *Agg = I.getAggregateOperand();
1929  GenericValue Dest;
1930  GenericValue Src = getOperandValue(Agg, SF);
1931 
1932  ExtractValueInst::idx_iterator IdxBegin = I.idx_begin();
1933  unsigned Num = I.getNumIndices();
1934  GenericValue *pSrc = &Src;
1935 
1936  for (unsigned i = 0 ; i < Num; ++i) {
1937  pSrc = &pSrc->AggregateVal[*IdxBegin];
1938  ++IdxBegin;
1939  }
1940 
1941  Type *IndexedType = ExtractValueInst::getIndexedType(Agg->getType(), I.getIndices());
1942  switch (IndexedType->getTypeID()) {
1943  default:
1944  llvm_unreachable("Unhandled dest type for extractelement instruction");
1945  break;
1946  case Type::IntegerTyID:
1947  Dest.IntVal = pSrc->IntVal;
1948  break;
1949  case Type::FloatTyID:
1950  Dest.FloatVal = pSrc->FloatVal;
1951  break;
1952  case Type::DoubleTyID:
1953  Dest.DoubleVal = pSrc->DoubleVal;
1954  break;
1955  case Type::ArrayTyID:
1956  case Type::StructTyID:
1957  case Type::FixedVectorTyID:
1958  case Type::ScalableVectorTyID:
1959  Dest.AggregateVal = pSrc->AggregateVal;
1960  break;
1961  case Type::PointerTyID:
1962  Dest.PointerVal = pSrc->PointerVal;
1963  break;
1964  }
1965 
1966  SetValue(&I, Dest, SF);
1967 }
1968 
1969 void Interpreter::visitInsertValueInst(InsertValueInst &I) {
1970 
1971  ExecutionContext &SF = ECStack.back();
1972  Value *Agg = I.getAggregateOperand();
1973 
1974  GenericValue Src1 = getOperandValue(Agg, SF);
1975  GenericValue Src2 = getOperandValue(I.getOperand(1), SF);
1976  GenericValue Dest = Src1; // Dest is a slightly changed Src1
1977 
1978  ExtractValueInst::idx_iterator IdxBegin = I.idx_begin();
1979  unsigned Num = I.getNumIndices();
1980 
1981  GenericValue *pDest = &Dest;
1982  for (unsigned i = 0 ; i < Num; ++i) {
1983  pDest = &pDest->AggregateVal[*IdxBegin];
1984  ++IdxBegin;
1985  }
1986  // pDest points to the target value in the Dest now
1987 
1988  Type *IndexedType = ExtractValueInst::getIndexedType(Agg->getType(), I.getIndices());
1989 
1990  switch (IndexedType->getTypeID()) {
1991  default:
1992  llvm_unreachable("Unhandled dest type for insertelement instruction");
1993  break;
1994  case Type::IntegerTyID:
1995  pDest->IntVal = Src2.IntVal;
1996  break;
1997  case Type::FloatTyID:
1998  pDest->FloatVal = Src2.FloatVal;
1999  break;
2000  case Type::DoubleTyID:
2001  pDest->DoubleVal = Src2.DoubleVal;
2002  break;
2003  case Type::ArrayTyID:
2004  case Type::StructTyID:
2005  case Type::FixedVectorTyID:
2006  case Type::ScalableVectorTyID:
2007  pDest->AggregateVal = Src2.AggregateVal;
2008  break;
2009  case Type::PointerTyID:
2010  pDest->PointerVal = Src2.PointerVal;
2011  break;
2012  }
2013 
2014  SetValue(&I, Dest, SF);
2015 }
2016 
2017 GenericValue Interpreter::getConstantExprValue (ConstantExpr *CE,
2018  ExecutionContext &SF) {
2019  switch (CE->getOpcode()) {
2020  case Instruction::Trunc:
2021  return executeTruncInst(CE->getOperand(0), CE->getType(), SF);
2022  case Instruction::ZExt:
2023  return executeZExtInst(CE->getOperand(0), CE->getType(), SF);
2024  case Instruction::SExt:
2025  return executeSExtInst(CE->getOperand(0), CE->getType(), SF);
2026  case Instruction::FPTrunc:
2027  return executeFPTruncInst(CE->getOperand(0), CE->getType(), SF);
2028  case Instruction::FPExt:
2029  return executeFPExtInst(CE->getOperand(0), CE->getType(), SF);
2030  case Instruction::UIToFP:
2031  return executeUIToFPInst(CE->getOperand(0), CE->getType(), SF);
2032  case Instruction::SIToFP:
2033  return executeSIToFPInst(CE->getOperand(0), CE->getType(), SF);
2034  case Instruction::FPToUI:
2035  return executeFPToUIInst(CE->getOperand(0), CE->getType(), SF);
2036  case Instruction::FPToSI:
2037  return executeFPToSIInst(CE->getOperand(0), CE->getType(), SF);
2038  case Instruction::PtrToInt:
2039  return executePtrToIntInst(CE->getOperand(0), CE->getType(), SF);
2040  case Instruction::IntToPtr:
2041  return executeIntToPtrInst(CE->getOperand(0), CE->getType(), SF);
2042  case Instruction::BitCast:
2043  return executeBitCastInst(CE->getOperand(0), CE->getType(), SF);
2044  case Instruction::GetElementPtr:
2045  return executeGEPOperation(CE->getOperand(0), gep_type_begin(CE),
2046  gep_type_end(CE), SF);
2047  case Instruction::FCmp:
2048  case Instruction::ICmp:
2049  return executeCmpInst(CE->getPredicate(),
2050  getOperandValue(CE->getOperand(0), SF),
2051  getOperandValue(CE->getOperand(1), SF),
2052  CE->getOperand(0)->getType());
2053  case Instruction::Select:
2054  return executeSelectInst(getOperandValue(CE->getOperand(0), SF),
2055  getOperandValue(CE->getOperand(1), SF),
2056  getOperandValue(CE->getOperand(2), SF),
2057  CE->getOperand(0)->getType());
2058  default :
2059  break;
2060  }
2061 
2062  // The cases below here require a GenericValue parameter for the result
2063  // so we initialize one, compute it and then return it.
2064  GenericValue Op0 = getOperandValue(CE->getOperand(0), SF);
2065  GenericValue Op1 = getOperandValue(CE->getOperand(1), SF);
2066  GenericValue Dest;
2067  Type * Ty = CE->getOperand(0)->getType();
2068  switch (CE->getOpcode()) {
2069  case Instruction::Add: Dest.IntVal = Op0.IntVal + Op1.IntVal; break;
2070  case Instruction::Sub: Dest.IntVal = Op0.IntVal - Op1.IntVal; break;
2071  case Instruction::Mul: Dest.IntVal = Op0.IntVal * Op1.IntVal; break;
2072  case Instruction::FAdd: executeFAddInst(Dest, Op0, Op1, Ty); break;
2073  case Instruction::FSub: executeFSubInst(Dest, Op0, Op1, Ty); break;
2074  case Instruction::FMul: executeFMulInst(Dest, Op0, Op1, Ty); break;
2075  case Instruction::FDiv: executeFDivInst(Dest, Op0, Op1, Ty); break;
2076  case Instruction::FRem: executeFRemInst(Dest, Op0, Op1, Ty); break;
2077  case Instruction::SDiv: Dest.IntVal = Op0.IntVal.sdiv(Op1.IntVal); break;
2078  case Instruction::UDiv: Dest.IntVal = Op0.IntVal.udiv(Op1.IntVal); break;
2079  case Instruction::URem: Dest.IntVal = Op0.IntVal.urem(Op1.IntVal); break;
2080  case Instruction::SRem: Dest.IntVal = Op0.IntVal.srem(Op1.IntVal); break;
2081  case Instruction::And: Dest.IntVal = Op0.IntVal & Op1.IntVal; break;
2082  case Instruction::Or: Dest.IntVal = Op0.IntVal | Op1.IntVal; break;
2083  case Instruction::Xor: Dest.IntVal = Op0.IntVal ^ Op1.IntVal; break;
2084  case Instruction::Shl:
2085  Dest.IntVal = Op0.IntVal.shl(Op1.IntVal.getZExtValue());
2086  break;
2087  case Instruction::LShr:
2088  Dest.IntVal = Op0.IntVal.lshr(Op1.IntVal.getZExtValue());
2089  break;
2090  case Instruction::AShr:
2091  Dest.IntVal = Op0.IntVal.ashr(Op1.IntVal.getZExtValue());
2092  break;
2093  default:
2094  dbgs() << "Unhandled ConstantExpr: " << *CE << "\n";
2095  llvm_unreachable("Unhandled ConstantExpr");
2096  }
2097  return Dest;
2098 }
2099 
2100 GenericValue Interpreter::getOperandValue(Value *V, ExecutionContext &SF) {
2101  if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
2102  return getConstantExprValue(CE, SF);
2103  } else if (Constant *CPV = dyn_cast<Constant>(V)) {
2104  return getConstantValue(CPV);
2105  } else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
2106  return PTOGV(getPointerToGlobal(GV));
2107  } else {
2108  return SF.Values[V];
2109  }
2110 }
2111 
2112 //===----------------------------------------------------------------------===//
2113 // Dispatch and Execution Code
2114 //===----------------------------------------------------------------------===//
2115 
2116 //===----------------------------------------------------------------------===//
2117 // callFunction - Execute the specified function...
2118 //
2119 void Interpreter::callFunction(Function *F, ArrayRef<GenericValue> ArgVals) {
2120  assert((ECStack.empty() || !ECStack.back().Caller ||
2121  ECStack.back().Caller->arg_size() == ArgVals.size()) &&
2122  "Incorrect number of arguments passed into function call!");
2123  // Make a new stack frame... and fill it in.
2124  ECStack.emplace_back();
2125  ExecutionContext &StackFrame = ECStack.back();
2126  StackFrame.CurFunction = F;
2127 
2128  // Special handling for external functions.
2129  if (F->isDeclaration()) {
2130  GenericValue Result = callExternalFunction (F, ArgVals);
2131  // Simulate a 'ret' instruction of the appropriate type.
2132  popStackAndReturnValueToCaller (F->getReturnType (), Result);
2133  return;
2134  }
2135 
2136  // Get pointers to first LLVM BB & Instruction in function.
2137  StackFrame.CurBB = &F->front();
2138  StackFrame.CurInst = StackFrame.CurBB->begin();
2139 
2140  // Run through the function arguments and initialize their values...
2141  assert((ArgVals.size() == F->arg_size() ||
2142  (ArgVals.size() > F->arg_size() && F->getFunctionType()->isVarArg()))&&
2143  "Invalid number of values passed to function invocation!");
2144 
2145  // Handle non-varargs arguments...
2146  unsigned i = 0;
2147  for (Function::arg_iterator AI = F->arg_begin(), E = F->arg_end();
2148  AI != E; ++AI, ++i)
2149  SetValue(&*AI, ArgVals[i], StackFrame);
2150 
2151  // Handle varargs arguments...
2152  StackFrame.VarArgs.assign(ArgVals.begin()+i, ArgVals.end());
2153 }
2154 
2155 
2156 void Interpreter::run() {
2157  while (!ECStack.empty()) {
2158  // Interpret a single instruction & increment the "PC".
2159  ExecutionContext &SF = ECStack.back(); // Current stack frame
2160  Instruction &I = *SF.CurInst++; // Increment before execute
2161 
2162  // Track the number of dynamic instructions executed.
2163  ++NumDynamicInsts;
2164 
2165  LLVM_DEBUG(dbgs() << "About to interpret: " << I << "\n");
2166  visit(I); // Dispatch to one of the visit* methods...
2167  }
2168 }
i
i
Definition: README.txt:29
llvm::NextPowerOf2
uint64_t NextPowerOf2(uint64_t A)
Returns the next power of two (in 64-bits) that is strictly greater than A.
Definition: MathExtras.h:683
llvm::CmpInst::FCMP_ULE
@ FCMP_ULE
1 1 0 1 True if unordered, less than, or equal
Definition: InstrTypes.h:737
llvm::Type::ArrayTyID
@ ArrayTyID
Arrays.
Definition: Type.h:76
llvm::Argument
This class represents an incoming formal argument to a Function.
Definition: Argument.h:29
llvm::Interpreter::visitUnreachableInst
void visitUnreachableInst(UnreachableInst &I)
Definition: Execution.cpp:932
llvm::Type::FloatTyID
@ FloatTyID
32-bit floating point type
Definition: Type.h:59
llvm::Interpreter::visitCallBase
void visitCallBase(CallBase &I)
Definition: Execution.cpp:1158
IMPLEMENT_INTEGER_ICMP
#define IMPLEMENT_INTEGER_ICMP(OP, TY)
Definition: Execution.cpp:167
MathExtras.h
llvm::Type::DoubleTyID
@ DoubleTyID
64-bit floating point type
Definition: Type.h:60
llvm
Definition: AllocatorList.h:23
llvm::GenericValue::AggregateVal
std::vector< GenericValue > AggregateVal
Definition: GenericValue.h:37
llvm::ExecutionContext::CurFunction
Function * CurFunction
Definition: Interpreter.h:60
llvm::CmpInst::ICMP_EQ
@ ICMP_EQ
equal
Definition: InstrTypes.h:743
llvm::ReturnInst
Return a value (possibly void), from a function.
Definition: Instructions.h:2953
llvm::VAArgInst
This class represents the va_arg llvm instruction, which returns an argument of the specified type gi...
Definition: Instructions.h:1838
llvm::Interpreter::visitFPExtInst
void visitFPExtInst(FPExtInst &I)
Definition: Execution.cpp:1722
intptr_t
llvm::generic_gep_type_iterator
Definition: GetElementPtrTypeIterator.h:31
llvm::BasicBlock::iterator
InstListType::iterator iterator
Instruction iterators...
Definition: BasicBlock.h:90
llvm::Type::isPointerTy
bool isPointerTy() const
True if this is an instance of PointerType.
Definition: Type.h:229
executeFCMP_OGE
static GenericValue executeFCMP_OGE(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:470
llvm::Interpreter::visitVAEndInst
void visitVAEndInst(VAEndInst &I)
Definition: Execution.cpp:1126
llvm::ExtractElementInst
This instruction extracts a single (scalar) element from a VectorType value.
Definition: Instructions.h:1878
llvm::Function
Definition: Function.h:61
llvm::APIntOps::RoundSignedAPIntToFloat
float RoundSignedAPIntToFloat(const APInt &APIVal)
Converts the given APInt to a float value.
Definition: APInt.h:2224
llvm::GenericValue::UIntPairVal
struct IntPair UIntPairVal
Definition: GenericValue.h:32
llvm::Interpreter::visitLoadInst
void visitLoadInst(LoadInst &I)
Definition: Execution.cpp:1093
IMPLEMENT_VECTOR_UNORDERED
#define IMPLEMENT_VECTOR_UNORDERED(TY, X, Y, FUNC)
Definition: Execution.cpp:523
llvm::Interpreter::visitShl
void visitShl(BinaryOperator &I)
Definition: Execution.cpp:1186
llvm::BitCastInst
This class represents a no-op cast from one type to another.
Definition: Instructions.h:5166
GetElementPtrTypeIterator.h
double
into xmm2 addss xmm2 xmm1 xmm3 addss xmm3 movaps xmm0 unpcklps xmm0 ret seems silly when it could just be one addps Expand libm rounding functions main should enable SSE DAZ mode and other fast SSE modes Think about doing i64 math in SSE regs on x86 This testcase should have no SSE instructions in and only one load from a constant double
Definition: README-SSE.txt:85
llvm::Type::getScalarType
Type * getScalarType() const
If this is a vector type, return the element type, otherwise return 'this'.
Definition: Type.h:317
llvm::Interpreter::visitInsertElementInst
void visitInsertElementInst(InsertElementInst &I)
Definition: Execution.cpp:1827
Interpreter.h
Statistic.h
llvm::GenericValue::PointerVal
PointerTy PointerVal
Definition: GenericValue.h:31
llvm::CmpInst::FCMP_ONE
@ FCMP_ONE
0 1 1 0 True if ordered and operands are unequal
Definition: InstrTypes.h:730
ErrorHandling.h
llvm::Interpreter::visitReturnInst
void visitReturnInst(ReturnInst &I)
Definition: Execution.cpp:918
PrintVolatile
static cl::opt< bool > PrintVolatile("interpreter-print-volatile", cl::Hidden, cl::desc("make the interpreter print every volatile load and store"))
llvm::APInt::zextOrTrunc
APInt zextOrTrunc(unsigned width) const
Zero extend or truncate to width.
Definition: APInt.cpp:952
llvm::CmpInst::ICMP_NE
@ ICMP_NE
not equal
Definition: InstrTypes.h:744
llvm::ExtractValueInst::getIndexedType
static Type * getIndexedType(Type *Agg, ArrayRef< unsigned > Idxs)
Returns the type of the element that would be extracted with an extractvalue instruction with the spe...
Definition: Instructions.cpp:2374
llvm::Type::getTypeID
TypeID getTypeID() const
Return the type id for the type.
Definition: Type.h:136
llvm::cl::Hidden
@ Hidden
Definition: CommandLine.h:143
llvm::DataLayout::getStructLayout
const StructLayout * getStructLayout(StructType *Ty) const
Returns a StructLayout object, indicating the alignment of the struct, its size, and the offsets of i...
Definition: DataLayout.cpp:671
APInt.h
llvm::Interpreter::runAtExitHandlers
void runAtExitHandlers()
runAtExitHandlers - Run any functions registered by the program's calls to atexit(3),...
Definition: Interpreter.cpp:70
executeFCMP_OLE
static GenericValue executeFCMP_OLE(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:456
llvm::CmpInst::ICMP_SGT
@ ICMP_SGT
signed greater than
Definition: InstrTypes.h:749
llvm::Type
The instances of the Type class are immutable: once they are created, they are never changed.
Definition: Type.h:46
llvm::APInt::getBitWidth
unsigned getBitWidth() const
Return the number of bits in the APInt.
Definition: APInt.h:1581
llvm::ExecutionContext::CurBB
BasicBlock * CurBB
Definition: Interpreter.h:61
llvm::Interpreter::run
void run()
Definition: Execution.cpp:2156
llvm::Interpreter::visitBranchInst
void visitBranchInst(BranchInst &I)
Definition: Execution.cpp:936
llvm::Interpreter::visitUnaryOperator
void visitUnaryOperator(UnaryOperator &I)
Definition: Execution.cpp:62
llvm::Interpreter::callFunction
void callFunction(Function *F, ArrayRef< GenericValue > ArgVals)
Definition: Execution.cpp:2119
executeFCMP_BOOL
static GenericValue executeFCMP_BOOL(GenericValue Src1, GenericValue Src2, Type *Ty, const bool val)
Definition: Execution.cpp:650
IntrinsicLowering.h
llvm::Interpreter::visitFPTruncInst
void visitFPTruncInst(FPTruncInst &I)
Definition: Execution.cpp:1717
llvm::VectorType::getElementType
Type * getElementType() const
Definition: DerivedTypes.h:424
llvm::CmpInst::ICMP_SLE
@ ICMP_SLE
signed less or equal
Definition: InstrTypes.h:752
llvm::APInt::lshr
APInt lshr(unsigned shiftAmt) const
Logical right-shift function.
Definition: APInt.h:987
llvm::Interpreter::visitICmpInst
void visitICmpInst(ICmpInst &I)
Definition: Execution.cpp:332
llvm::UnaryOperator
Definition: InstrTypes.h:103
llvm::gep_type_begin
gep_type_iterator gep_type_begin(const User *GEP)
Definition: GetElementPtrTypeIterator.h:139
llvm::Type::isFloatingPointTy
bool isFloatingPointTy() const
Return true if this is one of the six floating-point types.
Definition: Type.h:163
llvm::CmpInst::FCMP_OGT
@ FCMP_OGT
0 0 1 0 True if ordered and greater than
Definition: InstrTypes.h:726
INTEGER_VECTOR_FUNCTION
#define INTEGER_VECTOR_FUNCTION(OP)
LLVM_DEBUG
#define LLVM_DEBUG(X)
Definition: Debug.h:122
F
#define F(x, y, z)
Definition: MD5.cpp:56
llvm::Interpreter::visitVAArgInst
void visitVAArgInst(VAArgInst &I)
Definition: Execution.cpp:1765
llvm::Interpreter::visitStoreInst
void visitStoreInst(StoreInst &I)
Definition: Execution.cpp:1104
executeSelectInst
static GenericValue executeSelectInst(GenericValue Src1, GenericValue Src2, GenericValue Src3, Type *Ty)
Definition: Execution.cpp:845
llvm::BasicBlock
LLVM Basic Block Representation.
Definition: BasicBlock.h:58
llvm::GenericValue::Untyped
unsigned char Untyped[8]
Definition: GenericValue.h:33
llvm::gep_type_end
gep_type_iterator gep_type_end(const User *GEP)
Definition: GetElementPtrTypeIterator.h:146
llvm::VAStartInst
This represents the llvm.va_start intrinsic.
Definition: IntrinsicInst.h:1047
llvm::CmpInst::FCMP_ULT
@ FCMP_ULT
1 1 0 0 True if unordered or less than
Definition: InstrTypes.h:736
llvm::dbgs
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
Definition: Debug.cpp:132
llvm::ExecutionEngine::StoreValueToMemory
void StoreValueToMemory(const GenericValue &Val, GenericValue *Ptr, Type *Ty)
StoreValueToMemory - Stores the data in Val of type Ty at address Ptr.
Definition: ExecutionEngine.cpp:1018
llvm::Interpreter::visitSIToFPInst
void visitSIToFPInst(SIToFPInst &I)
Definition: Execution.cpp:1732
executeFCMP_UGE
static GenericValue executeFCMP_UGE(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:561
CommandLine.h
llvm::ExecutionContext::Values
std::map< Value *, GenericValue > Values
Definition: Interpreter.h:65
llvm::Interpreter::exitCalled
void exitCalled(GenericValue GV)
Definition: Execution.cpp:875
llvm::ExecutionEngine::LoadValueFromMemory
void LoadValueFromMemory(GenericValue &Result, GenericValue *Ptr, Type *Ty)
FIXME: document.
Definition: ExecutionEngine.cpp:1068
llvm::Interpreter::visitZExtInst
void visitZExtInst(ZExtInst &I)
Definition: Execution.cpp:1712
llvm::ConstantInt
This is the shared class of boolean and integer constants.
Definition: Constants.h:77
llvm::GenericValue
Definition: GenericValue.h:23
llvm::Interpreter::visitIntrinsicInst
void visitIntrinsicInst(IntrinsicInst &I)
Definition: Execution.cpp:1135
llvm::GenericValue::IntVal
APInt IntVal
Definition: GenericValue.h:35
executeFCMP_UEQ
static GenericValue executeFCMP_UEQ(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:533
llvm::Interpreter::visitIndirectBrInst
void visitIndirectBrInst(IndirectBrInst &I)
Definition: Execution.cpp:968
llvm::ExecutionContext::Caller
CallBase * Caller
Definition: Interpreter.h:63
executeICMP_NE
static GenericValue executeICMP_NE(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:206
llvm::APInt::lshrInPlace
void lshrInPlace(unsigned ShiftAmt)
Logical right-shift this APInt by ShiftAmt in place.
Definition: APInt.h:994
Constants.h
executeFCMP_UNO
static GenericValue executeFCMP_UNO(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:619
llvm::PHINode::getIncomingValue
Value * getIncomingValue(unsigned i) const
Return incoming value number x.
Definition: Instructions.h:2696
IMPLEMENT_VECTOR_FCMP
#define IMPLEMENT_VECTOR_FCMP(OP)
Definition: Execution.cpp:371
E
static GCRegistry::Add< CoreCLRGC > E("coreclr", "CoreCLR-compatible GC")
llvm::CmpInst::ICMP_ULE
@ ICMP_ULE
unsigned less or equal
Definition: InstrTypes.h:748
llvm::Interpreter::visitAllocaInst
void visitAllocaInst(AllocaInst &I)
Definition: Execution.cpp:1017
executeICMP_SLE
static GenericValue executeICMP_SLE(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:290
llvm::BasicBlock::begin
iterator begin()
Instruction iterator methods.
Definition: BasicBlock.h:296
llvm::FCmpInst
This instruction compares its operands according to the predicate given to the constructor.
Definition: Instructions.h:1372
llvm::CmpInst::FCMP_UGE
@ FCMP_UGE
1 0 1 1 True if unordered, greater than, or equal
Definition: InstrTypes.h:735
IMPLEMENT_VECTOR_INTEGER_ICMP
#define IMPLEMENT_VECTOR_INTEGER_ICMP(OP, TY)
Definition: Execution.cpp:172
llvm::ms_demangle::QualifierMangleMode::Result
@ Result
IMPLEMENT_BINARY_OPERATOR
#define IMPLEMENT_BINARY_OPERATOR(OP, TY)
Definition: Execution.cpp:103
llvm::Type::isVectorTy
bool isVectorTy() const
True if this is an instance of VectorType.
Definition: Type.h:235
llvm::InsertElementInst
This instruction inserts a single (scalar) element into a VectorType value.
Definition: Instructions.h:1942
llvm::GVTOP
void * GVTOP(const GenericValue &GV)
Definition: GenericValue.h:50
executeICMP_SGE
static GenericValue executeICMP_SGE(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:318
llvm::IntegerType
Class to represent integer types.
Definition: DerivedTypes.h:40
llvm::CmpInst::FCMP_UNO
@ FCMP_UNO
1 0 0 0 True if unordered: isnan(X) | isnan(Y)
Definition: InstrTypes.h:732
llvm::Instruction
Definition: Instruction.h:45
executeFRemInst
static void executeFRemInst(GenericValue &Dest, GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:152
llvm::Type::getScalarSizeInBits
unsigned getScalarSizeInBits() const LLVM_READONLY
If this is a vector type, return the getPrimitiveSizeInBits value for the element type.
Definition: Type.cpp:147
executeFCMP_ULT
static GenericValue executeFCMP_ULT(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:570
executeFCMP_OLT
static GenericValue executeFCMP_OLT(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:484
llvm::report_fatal_error
LLVM_ATTRIBUTE_NORETURN void report_fatal_error(Error Err, bool gen_crash_diag=true)
Report a serious error, calling any installed error handler.
Definition: Error.cpp:140
llvm::APInt::getZExtValue
uint64_t getZExtValue() const
Get zero extended value.
Definition: APInt.h:1631
llvm::STATISTIC
STATISTIC(NumFunctions, "Total number of functions")
llvm::Interpreter::visitTruncInst
void visitTruncInst(TruncInst &I)
Definition: Execution.cpp:1702
llvm::ExecutionEngine::getConstantValue
GenericValue getConstantValue(const Constant *C)
Converts a Constant* into a GenericValue, including handling of ConstantExpr values.
Definition: ExecutionEngine.cpp:585
llvm::CmpInst::FCMP_OEQ
@ FCMP_OEQ
0 0 0 1 True if ordered and equal
Definition: InstrTypes.h:725
llvm::CmpInst::FCMP_OLT
@ FCMP_OLT
0 1 0 0 True if ordered and less than
Definition: InstrTypes.h:728
llvm::Type::PointerTyID
@ PointerTyID
Pointers.
Definition: Type.h:74
llvm::Interpreter::visitBitCastInst
void visitBitCastInst(BitCastInst &I)
Definition: Execution.cpp:1757
llvm::GenericValue::IntPair::first
unsigned int first
Definition: GenericValue.h:25
executeFDivInst
static void executeFDivInst(GenericValue &Dest, GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:141
llvm::APInt::srem
APInt srem(const APInt &RHS) const
Function for signed remainder operation.
Definition: APInt.cpp:1767
FLOAT_VECTOR_OP
#define FLOAT_VECTOR_OP(OP)
llvm::CmpInst::FCMP_FALSE
@ FCMP_FALSE
0 0 0 0 Always false (always folded)
Definition: InstrTypes.h:724
llvm::APInt::ashr
APInt ashr(unsigned ShiftAmt) const
Arithmetic right-shift function.
Definition: APInt.h:963
llvm::InvokeInst
Invoke instruction.
Definition: Instructions.h:3716
llvm::ExecutionEngine::getDataLayout
const DataLayout & getDataLayout() const
Definition: ExecutionEngine.h:197
llvm::Type::isIntegerTy
bool isIntegerTy() const
True if this is an instance of IntegerType.
Definition: Type.h:202
llvm::VectorType
Base class of all SIMD vector types.
Definition: DerivedTypes.h:391
executeFSubInst
static void executeFSubInst(GenericValue &Dest, GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:119
llvm::cl::opt< bool >
val
The initial backend is deliberately restricted to z10 We should add support for later architectures at some point If an asm ties an i32 r result to an i64 the input will be treated as an leaving the upper bits uninitialised For i64 store i32 val
Definition: README.txt:15
executeFCMP_UGT
static GenericValue executeFCMP_UGT(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:579
IMPLEMENT_UNORDERED
#define IMPLEMENT_UNORDERED(TY, X, Y)
Definition: Execution.cpp:512
llvm::StoreInst
An instruction for storing to memory.
Definition: Instructions.h:303
executeICMP_UGE
static GenericValue executeICMP_UGE(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:304
llvm::GlobalValue
Definition: GlobalValue.h:44
llvm::Constant
This is an important base class in LLVM.
Definition: Constant.h:41
llvm::ICmpInst
This instruction compares its operands according to the predicate given to the constructor.
Definition: Instructions.h:1206
Index
uint32_t Index
Definition: ELFObjHandler.cpp:84
llvm::APInt::sdiv
APInt sdiv(const APInt &RHS) const
Signed division function for APInt.
Definition: APInt.cpp:1675
llvm::StructLayout
Used to lazily calculate structure layout information for a target machine, based on the DataLayout s...
Definition: DataLayout.h:604
llvm::Interpreter::visitVAStartInst
void visitVAStartInst(VAStartInst &I)
Definition: Execution.cpp:1118
llvm::FPToSIInst
This class represents a cast from floating point to signed integer.
Definition: Instructions.h:5033
executeFCMP_OEQ
static GenericValue executeFCMP_OEQ(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:380
llvm::TruncInst
This class represents a truncation of integer types.
Definition: Instructions.h:4721
executeICMP_SLT
static GenericValue executeICMP_SLT(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:234
llvm::DataLayout::isLittleEndian
bool isLittleEndian() const
Layout endianness...
Definition: DataLayout.h:241
MASK_VECTOR_NANS
#define MASK_VECTOR_NANS(TY, X, Y, FLAG)
Definition: Execution.cpp:419
I
#define I(x, y, z)
Definition: MD5.cpp:59
llvm::APIntOps::RoundFloatToAPInt
APInt RoundFloatToAPInt(float Float, unsigned width)
Converts a float value into a APInt.
Definition: APInt.h:2236
llvm::GetElementPtrInst
an instruction for type-safe pointer arithmetic to access elements of arrays and structs
Definition: Instructions.h:931
llvm::PHINode::getBasicBlockIndex
int getBasicBlockIndex(const BasicBlock *BB) const
Return the first index of the specified basic block in the value list for this PHI.
Definition: Instructions.h:2778
llvm::APIntOps::RoundAPIntToFloat
float RoundAPIntToFloat(const APInt &APIVal)
Converts the given APInt to a float value.
Definition: APInt.h:2217
llvm::InstVisitor< Interpreter >::visit
void visit(Iterator Start, Iterator End)
Definition: InstVisitor.h:88
llvm::Interpreter::visitVACopyInst
void visitVACopyInst(VACopyInst &I)
Definition: Execution.cpp:1130
assert
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
llvm::Interpreter::visitInsertValueInst
void visitInsertValueInst(InsertValueInst &I)
Definition: Execution.cpp:1969
llvm::Interpreter::visitExtractElementInst
void visitExtractElementInst(ExtractElementInst &I)
Definition: Execution.cpp:1794
llvm::CmpInst::FCMP_OGE
@ FCMP_OGE
0 0 1 1 True if ordered and greater than or equal
Definition: InstrTypes.h:727
llvm::CmpInst::ICMP_UGE
@ ICMP_UGE
unsigned greater or equal
Definition: InstrTypes.h:746
executeICMP_EQ
static GenericValue executeICMP_EQ(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:192
llvm::SelectInst
This class represents the LLVM 'select' instruction.
Definition: Instructions.h:1743
llvm::Type::isVoidTy
bool isVoidTy() const
Return true if this is 'void'.
Definition: Type.h:139
llvm::FPToUIInst
This class represents a cast from floating point to unsigned integer.
Definition: Instructions.h:4994
llvm::Interpreter::visitPtrToIntInst
void visitPtrToIntInst(PtrToIntInst &I)
Definition: Execution.cpp:1747
IMPLEMENT_SCALAR_NANS
#define IMPLEMENT_SCALAR_NANS(TY, X, Y)
Definition: Execution.cpp:394
llvm::Interpreter::visitFCmpInst
void visitFCmpInst(FCmpInst &I)
Definition: Execution.cpp:665
llvm::APInt::urem
APInt urem(const APInt &RHS) const
Unsigned remainder operation.
Definition: APInt.cpp:1697
llvm::ZExtInst
This class represents zero extension of integer types.
Definition: Instructions.h:4760
llvm::APInt
Class for arbitrary precision integers.
Definition: APInt.h:70
llvm::APIntOps::RoundSignedAPIntToDouble
double RoundSignedAPIntToDouble(const APInt &APIVal)
Converts the given APInt to a double value.
Definition: APInt.h:2212
llvm::Interpreter::visitFPToUIInst
void visitFPToUIInst(FPToUIInst &I)
Definition: Execution.cpp:1737
llvm::CmpInst::ICMP_SLT
@ ICMP_SLT
signed less than
Definition: InstrTypes.h:751
llvm::size
auto size(R &&Range, std::enable_if_t< std::is_base_of< std::random_access_iterator_tag, typename std::iterator_traits< decltype(Range.begin())>::iterator_category >::value, void > *=nullptr)
Get the size of a range.
Definition: STLExtras.h:1463
llvm::ExecutionEngine::getPointerToGlobal
void * getPointerToGlobal(const GlobalValue *GV)
getPointerToGlobal - This returns the address of the specified global value.
Definition: ExecutionEngine.cpp:565
executeFCMP_OGT
static GenericValue executeFCMP_OGT(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:498
llvm::ArrayRef
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
Definition: APInt.h:32
llvm::VAEndInst
This represents the llvm.va_end intrinsic.
Definition: IntrinsicInst.h:1060
llvm::BinaryOperator
Definition: InstrTypes.h:190
llvm::ExecutionContext::CurInst
BasicBlock::iterator CurInst
Definition: Interpreter.h:62
llvm::sys::Memory
This class provides various memory handling functions that manipulate MemoryBlock instances.
Definition: Memory.h:52
llvm::StructType
Class to represent struct types.
Definition: DerivedTypes.h:212
Cond
SmallVector< MachineOperand, 4 > Cond
Definition: BasicBlockSections.cpp:167
executeICMP_ULT
static GenericValue executeICMP_ULT(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:220
llvm::CmpInst::ICMP_ULT
@ ICMP_ULT
unsigned less than
Definition: InstrTypes.h:747
llvm::PointerTy
void * PointerTy
Definition: GenericValue.h:21
llvm_unreachable
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
Definition: ErrorHandling.h:136
llvm::Value::getType
Type * getType() const
All values are typed, get the type of this value.
Definition: Value.h:256
llvm::ExecutionContext::VarArgs
std::vector< GenericValue > VarArgs
Definition: Interpreter.h:66
executeFAddInst
static void executeFAddInst(GenericValue &Dest, GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:108
llvm::Interpreter::visitLShr
void visitLShr(BinaryOperator &I)
Definition: Execution.cpp:1213
uint32_t
llvm::Interpreter::visitSExtInst
void visitSExtInst(SExtInst &I)
Definition: Execution.cpp:1707
llvm::PtrToIntInst
This class represents a cast from a pointer to an integer.
Definition: Instructions.h:5115
llvm::Interpreter::visitSwitchInst
void visitSwitchInst(SwitchInst &I)
Definition: Execution.cpp:949
llvm::FPExtInst
This class represents an extension of floating point types.
Definition: Instructions.h:4877
llvm::APInt::doubleToBits
static APInt doubleToBits(double V)
Converts a double to APInt bits.
Definition: APInt.h:1801
IMPLEMENT_VAARG
#define IMPLEMENT_VAARG(TY)
Definition: Execution.cpp:1762
llvm::SExtInst
This class represents a sign extension of integer types.
Definition: Instructions.h:4799
llvm::APIntOps::RoundAPIntToDouble
double RoundAPIntToDouble(const APInt &APIVal)
Converts the given APInt to a double value.
Definition: APInt.h:2205
llvm::LoadInst
An instruction for reading from memory.
Definition: Instructions.h:174
executeFCMP_UNE
static GenericValue executeFCMP_UNE(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:543
llvm::GenericValue::DoubleVal
double DoubleVal
Definition: GenericValue.h:29
llvm::APInt::udiv
APInt udiv(const APInt &RHS) const
Unsigned division operation.
Definition: APInt.cpp:1604
llvm::Interpreter::visitUIToFPInst
void visitUIToFPInst(UIToFPInst &I)
Definition: Execution.cpp:1727
llvm::ConstantInt::getZExtValue
uint64_t getZExtValue() const
Return the constant as a 64-bit unsigned integer value after it has been zero extended as appropriate...
Definition: Constants.h:140
llvm::APInt::zext
APInt zext(unsigned width) const
Zero extend to a new width.
Definition: APInt.cpp:934
llvm::Type::IntegerTyID
@ IntegerTyID
Arbitrary bit width integers.
Definition: Type.h:72
llvm::APInt::bitsToDouble
double bitsToDouble() const
Converts APInt bits to a double.
Definition: APInt.h:1784
llvm::MCID::Select
@ Select
Definition: MCInstrDesc.h:162
j
return j(j<< 16)
llvm::GenericValue::FloatVal
float FloatVal
Definition: GenericValue.h:30
llvm::tgtok::IntVal
@ IntVal
Definition: TGLexer.h:64
llvm::CmpInst::FCMP_UGT
@ FCMP_UGT
1 0 1 0 True if unordered or greater than
Definition: InstrTypes.h:734
llvm::ConstantExpr
A constant value that is initialized with an expression using other constant values.
Definition: Constants.h:931
executeFCMP_ORD
static GenericValue executeFCMP_ORD(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:588
llvm::ExecutionContext
Definition: Interpreter.h:59
llvm::APInt::trunc
APInt trunc(unsigned width) const
Truncate to new width.
Definition: APInt.cpp:862
llvm::Type::isFloatTy
bool isFloatTy() const
Return true if this is 'float', a 32-bit IEEE fp type.
Definition: Type.h:148
llvm::StructLayout::getElementOffset
uint64_t getElementOffset(unsigned Idx) const
Definition: DataLayout.h:634
llvm::ArrayRef::begin
iterator begin() const
Definition: ArrayRef.h:153
llvm::VACopyInst
This represents the llvm.va_copy intrinsic.
Definition: IntrinsicInst.h:1073
llvm::Type::FixedVectorTyID
@ FixedVectorTyID
Fixed width SIMD vector type.
Definition: Type.h:77
llvm::CallBase::arg_size
unsigned arg_size() const
Definition: InstrTypes.h:1329
llvm::ExtractValueInst
This instruction extracts a struct member or array element value from an aggregate value.
Definition: Instructions.h:2346
llvm::TypeSize
Definition: TypeSize.h:417
INTEGER_VECTOR_OPERATION
#define INTEGER_VECTOR_OPERATION(OP)
llvm::BitWidth
constexpr unsigned BitWidth
Definition: BitmaskEnum.h:147
llvm::Type::isDoubleTy
bool isDoubleTy() const
Return true if this is 'double', a 64-bit IEEE fp type.
Definition: Type.h:151
executeFMulInst
static void executeFMulInst(GenericValue &Dest, GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:130
IMPLEMENT_POINTER_ICMP
#define IMPLEMENT_POINTER_ICMP(OP)
Definition: Execution.cpp:186
llvm::Interpreter::visitBinaryOperator
void visitBinaryOperator(BinaryOperator &I)
Definition: Execution.cpp:736
executeFCMP_ULE
static GenericValue executeFCMP_ULE(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:552
llvm::UIToFPInst
This class represents a cast unsigned integer to floating point.
Definition: Instructions.h:4916
executeFCMP_ONE
static GenericValue executeFCMP_ONE(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:430
llvm::CmpInst::ICMP_SGE
@ ICMP_SGE
signed greater or equal
Definition: InstrTypes.h:750
llvm::MCID::Add
@ Add
Definition: MCInstrDesc.h:183
llvm::APIntOps::RoundDoubleToAPInt
APInt RoundDoubleToAPInt(double Double, unsigned width)
Converts the given double value into a APInt.
Definition: APInt.cpp:766
llvm::CallBase::getCalledOperand
Value * getCalledOperand() const
Definition: InstrTypes.h:1389
llvm::Interpreter::visitFPToSIInst
void visitFPToSIInst(FPToSIInst &I)
Definition: Execution.cpp:1742
llvm::IntToPtrInst
This class represents a cast from an integer to a pointer.
Definition: Instructions.h:5072
llvm::IndirectBrInst
Indirect Branch Instruction.
Definition: Instructions.h:3581
llvm::APInt::sext
APInt sext(unsigned width) const
Sign extend to a new width.
Definition: APInt.cpp:910
llvm::ExtractValueInst::idx_iterator
const unsigned * idx_iterator
Definition: Instructions.h:2393
llvm::IntrinsicInst
A wrapper class for inspecting calls to intrinsic functions.
Definition: IntrinsicInst.h:45
llvm::Interpreter::visitShuffleVectorInst
void visitShuffleVectorInst(ShuffleVectorInst &I)
Definition: Execution.cpp:1859
llvm::Interpreter::visitAShr
void visitAShr(BinaryOperator &I)
Definition: Execution.cpp:1240
llvm::GenericValue::IntPair::second
unsigned int second
Definition: GenericValue.h:26
executeICMP_ULE
static GenericValue executeICMP_ULE(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:276
llvm::Type::getVoidTy
static Type * getVoidTy(LLVMContext &C)
Definition: Type.cpp:180
llvm::Interpreter::visitSelectInst
void visitSelectInst(SelectInst &I)
Definition: Execution.cpp:861
llvm::Type::StructTyID
@ StructTyID
Structures.
Definition: Type.h:75
llvm::ShuffleVectorInst
This instruction constructs a fixed permutation of two input vectors.
Definition: Instructions.h:2014
Instructions.h
llvm::PTOGV
GenericValue PTOGV(void *P)
Definition: GenericValue.h:49
executeCmpInst
static GenericValue executeCmpInst(unsigned predicate, GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:700
llvm::SIToFPInst
This class represents a cast from signed integer to floating point.
Definition: Instructions.h:4955
exit
declare void exit(i32) noreturn nounwind This compiles into
Definition: README.txt:1072
llvm::CmpInst::ICMP_UGT
@ ICMP_UGT
unsigned greater than
Definition: InstrTypes.h:745
llvm::CmpInst::FCMP_UNE
@ FCMP_UNE
1 1 1 0 True if unordered or not equal
Definition: InstrTypes.h:738
llvm::FPTruncInst
This class represents a truncation of floating point types.
Definition: Instructions.h:4838
SetValue
static void SetValue(Value *V, GenericValue Val, ExecutionContext &SF)
Definition: Execution.cpp:41
llvm::ArrayRef::size
size_t size() const
size - Get the array size.
Definition: ArrayRef.h:165
llvm::IntegerType::getBitWidth
unsigned getBitWidth() const
Get the number of bits in this IntegerType.
Definition: DerivedTypes.h:71
llvm::max
Align max(MaybeAlign Lhs, Align Rhs)
Definition: Alignment.h:340
llvm::PHINode
Definition: Instructions.h:2600
llvm::CmpInst::FCMP_OLE
@ FCMP_OLE
0 1 0 1 True if ordered and less than or equal
Definition: InstrTypes.h:729
llvm::Interpreter::callExternalFunction
GenericValue callExternalFunction(Function *F, ArrayRef< GenericValue > ArgVals)
Definition: ExternalFunctions.cpp:258
llvm::APInt::bitsToFloat
float bitsToFloat() const
Converts APInt bits to a float.
Definition: APInt.h:1793
llvm::CallBase
Base class for all callable instructions (InvokeInst and CallInst) Holds everything related to callin...
Definition: InstrTypes.h:1164
llvm::Type::ScalableVectorTyID
@ ScalableVectorTyID
Scalable SIMD vector type.
Definition: Type.h:78
DerivedTypes.h
llvm::DataLayout::getPointerSizeInBits
unsigned getPointerSizeInBits(unsigned AS=0) const
Layout pointer size, in bits FIXME: The defaults need to be removed once all of the backends/clients ...
Definition: DataLayout.h:404
llvm::UnreachableInst
This function has undefined behavior.
Definition: Instructions.h:4680
llvm::Interpreter::visitGetElementPtrInst
void visitGetElementPtrInst(GetElementPtrInst &I)
Definition: Execution.cpp:1087
llvm::SwitchInst
Multiway switch.
Definition: Instructions.h:3179
executeFNegInst
static void executeFNegInst(GenericValue &Dest, GenericValue Src, Type *Ty)
Definition: Execution.cpp:49
llvm::AllocaInst
an instruction to allocate memory on the stack
Definition: Instructions.h:61
llvm::APInt::shl
APInt shl(unsigned shiftAmt) const
Left-shift function.
Definition: APInt.h:1009
llvm::cl::desc
Definition: CommandLine.h:414
IMPLEMENT_FCMP
#define IMPLEMENT_FCMP(OP, TY)
Definition: Execution.cpp:358
llvm::BranchInst
Conditional or Unconditional Branch instruction.
Definition: Instructions.h:3035
raw_ostream.h
llvm::IntrinsicLowering::LowerIntrinsicCall
void LowerIntrinsicCall(CallInst *CI)
Replace a call to the specified intrinsic function.
Definition: IntrinsicLowering.cpp:224
llvm::Interpreter::visitIntToPtrInst
void visitIntToPtrInst(IntToPtrInst &I)
Definition: Execution.cpp:1752
llvm::InsertValueInst
This instruction inserts a struct field of array element value into an aggregate value.
Definition: Instructions.h:2457
llvm::CmpInst::FCMP_TRUE
@ FCMP_TRUE
1 1 1 1 Always true (always folded)
Definition: InstrTypes.h:739
llvm::Interpreter::visitExtractValueInst
void visitExtractValueInst(ExtractValueInst &I)
Definition: Execution.cpp:1926
llvm::Value
LLVM Value Representation.
Definition: Value.h:75
llvm::safe_malloc
LLVM_ATTRIBUTE_RETURNS_NONNULL void * safe_malloc(size_t Sz)
Definition: MemAlloc.h:25
executeICMP_SGT
static GenericValue executeICMP_SGT(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:262
Debug.h
llvm::ArrayRef::end
iterator end() const
Definition: ArrayRef.h:154
llvm::APInt::floatToBits
static APInt floatToBits(float V)
Converts a float to APInt bits.
Definition: APInt.h:1809
executeICMP_UGT
static GenericValue executeICMP_UGT(GenericValue Src1, GenericValue Src2, Type *Ty)
Definition: Execution.cpp:248
llvm::CmpInst::FCMP_ORD
@ FCMP_ORD
0 1 1 1 True if ordered (no nans)
Definition: InstrTypes.h:731
getShiftAmount
static unsigned getShiftAmount(uint64_t orgShiftAmount, llvm::APInt valueToShift)
Definition: Execution.cpp:1175
llvm::CallBase::args
iterator_range< User::op_iterator > args()
Iteration adapter for range-for loops.
Definition: InstrTypes.h:1322
llvm::CmpInst::FCMP_UEQ
@ FCMP_UEQ
1 0 0 1 True if unordered or equal
Definition: InstrTypes.h:733
llvm::Type::getPrimitiveSizeInBits
TypeSize getPrimitiveSizeInBits() const LLVM_READONLY
Return the basic size of this type if it is a primitive type.
Definition: Type.cpp:122
llvm::DataLayout::getTypeAllocSize
TypeSize getTypeAllocSize(Type *Ty) const
Returns the offset in bytes between successive objects of the specified type, including alignment pad...
Definition: DataLayout.h:498
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