Bug Summary

File:lib/CodeGen/IntrinsicLowering.cpp
Location:line 74, column 24
Description:Called C++ object pointer is null

Annotated Source Code

1//===-- IntrinsicLowering.cpp - Intrinsic Lowering default implementation -===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the IntrinsicLowering class.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/CodeGen/IntrinsicLowering.h"
15#include "llvm/ADT/SmallVector.h"
16#include "llvm/IR/CallSite.h"
17#include "llvm/IR/Constants.h"
18#include "llvm/IR/DataLayout.h"
19#include "llvm/IR/DerivedTypes.h"
20#include "llvm/IR/IRBuilder.h"
21#include "llvm/IR/Module.h"
22#include "llvm/IR/Type.h"
23#include "llvm/Support/ErrorHandling.h"
24#include "llvm/Support/raw_ostream.h"
25using namespace llvm;
26
27template <class ArgIt>
28static void EnsureFunctionExists(Module &M, const char *Name,
29 ArgIt ArgBegin, ArgIt ArgEnd,
30 Type *RetTy) {
31 // Insert a correctly-typed definition now.
32 std::vector<Type *> ParamTys;
33 for (ArgIt I = ArgBegin; I != ArgEnd; ++I)
34 ParamTys.push_back(I->getType());
35 M.getOrInsertFunction(Name, FunctionType::get(RetTy, ParamTys, false));
36}
37
38static void EnsureFPIntrinsicsExist(Module &M, Function *Fn,
39 const char *FName,
40 const char *DName, const char *LDName) {
41 // Insert definitions for all the floating point types.
42 switch((int)Fn->arg_begin()->getType()->getTypeID()) {
43 case Type::FloatTyID:
44 EnsureFunctionExists(M, FName, Fn->arg_begin(), Fn->arg_end(),
45 Type::getFloatTy(M.getContext()));
46 break;
47 case Type::DoubleTyID:
48 EnsureFunctionExists(M, DName, Fn->arg_begin(), Fn->arg_end(),
49 Type::getDoubleTy(M.getContext()));
50 break;
51 case Type::X86_FP80TyID:
52 case Type::FP128TyID:
53 case Type::PPC_FP128TyID:
54 EnsureFunctionExists(M, LDName, Fn->arg_begin(), Fn->arg_end(),
55 Fn->arg_begin()->getType());
56 break;
57 }
58}
59
60/// ReplaceCallWith - This function is used when we want to lower an intrinsic
61/// call to a call of an external function. This handles hard cases such as
62/// when there was already a prototype for the external function, and if that
63/// prototype doesn't match the arguments we expect to pass in.
64template <class ArgIt>
65static CallInst *ReplaceCallWith(const char *NewFn, CallInst *CI,
66 ArgIt ArgBegin, ArgIt ArgEnd,
67 Type *RetTy) {
68 // If we haven't already looked up this function, check to see if the
69 // program already contains a function with this name.
70 Module *M = CI->getParent()->getParent()->getParent();
71 // Get or insert the definition now.
72 std::vector<Type *> ParamTys;
73 for (ArgIt I = ArgBegin; I != ArgEnd; ++I)
3
←
Loop condition is true. Entering loop body
→
74 ParamTys.push_back((*I)->getType());
4
←
Called C++ object pointer is null
75 Constant* FCache = M->getOrInsertFunction(NewFn,
76 FunctionType::get(RetTy, ParamTys, false));
77
78 IRBuilder<> Builder(CI->getParent(), CI);
79 SmallVector<Value *, 8> Args(ArgBegin, ArgEnd);
80 CallInst *NewCI = Builder.CreateCall(FCache, Args);
81 NewCI->setName(CI->getName());
82 if (!CI->use_empty())
83 CI->replaceAllUsesWith(NewCI);
84 return NewCI;
85}
86
87// VisualStudio defines setjmp as _setjmp
88#if defined(_MSC_VER) && defined(setjmp) && \
89 !defined(setjmp_undefined_for_msvc)
90# pragma push_macro("setjmp")
91# undef setjmp
92# define setjmp_undefined_for_msvc
93#endif
94
95void IntrinsicLowering::AddPrototypes(Module &M) {
96 LLVMContext &Context = M.getContext();
97 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
98 if (I->isDeclaration() && !I->use_empty())
99 switch (I->getIntrinsicID()) {
100 default: break;
101 case Intrinsic::setjmp:
102 EnsureFunctionExists(M, "setjmp", I->arg_begin(), I->arg_end(),
103 Type::getInt32Ty(M.getContext()));
104 break;
105 case Intrinsic::longjmp:
106 EnsureFunctionExists(M, "longjmp", I->arg_begin(), I->arg_end(),
107 Type::getVoidTy(M.getContext()));
108 break;
109 case Intrinsic::siglongjmp:
110 EnsureFunctionExists(M, "abort", I->arg_end(), I->arg_end(),
111 Type::getVoidTy(M.getContext()));
112 break;
113 case Intrinsic::memcpy:
114 M.getOrInsertFunction("memcpy",
115 Type::getInt8PtrTy(Context),
116 Type::getInt8PtrTy(Context),
117 Type::getInt8PtrTy(Context),
118 DL.getIntPtrType(Context), nullptr);
119 break;
120 case Intrinsic::memmove:
121 M.getOrInsertFunction("memmove",
122 Type::getInt8PtrTy(Context),
123 Type::getInt8PtrTy(Context),
124 Type::getInt8PtrTy(Context),
125 DL.getIntPtrType(Context), nullptr);
126 break;
127 case Intrinsic::memset:
128 M.getOrInsertFunction("memset",
129 Type::getInt8PtrTy(Context),
130 Type::getInt8PtrTy(Context),
131 Type::getInt32Ty(M.getContext()),
132 DL.getIntPtrType(Context), nullptr);
133 break;
134 case Intrinsic::sqrt:
135 EnsureFPIntrinsicsExist(M, I, "sqrtf", "sqrt", "sqrtl");
136 break;
137 case Intrinsic::sin:
138 EnsureFPIntrinsicsExist(M, I, "sinf", "sin", "sinl");
139 break;
140 case Intrinsic::cos:
141 EnsureFPIntrinsicsExist(M, I, "cosf", "cos", "cosl");
142 break;
143 case Intrinsic::pow:
144 EnsureFPIntrinsicsExist(M, I, "powf", "pow", "powl");
145 break;
146 case Intrinsic::log:
147 EnsureFPIntrinsicsExist(M, I, "logf", "log", "logl");
148 break;
149 case Intrinsic::log2:
150 EnsureFPIntrinsicsExist(M, I, "log2f", "log2", "log2l");
151 break;
152 case Intrinsic::log10:
153 EnsureFPIntrinsicsExist(M, I, "log10f", "log10", "log10l");
154 break;
155 case Intrinsic::exp:
156 EnsureFPIntrinsicsExist(M, I, "expf", "exp", "expl");
157 break;
158 case Intrinsic::exp2:
159 EnsureFPIntrinsicsExist(M, I, "exp2f", "exp2", "exp2l");
160 break;
161 }
162}
163
164/// LowerBSWAP - Emit the code to lower bswap of V before the specified
165/// instruction IP.
166static Value *LowerBSWAP(LLVMContext &Context, Value *V, Instruction *IP) {
167 assert(V->getType()->isIntegerTy() && "Can't bswap a non-integer type!")((V->getType()->isIntegerTy() && "Can't bswap a non-integer type!"
) ? static_cast<void> (0) : __assert_fail ("V->getType()->isIntegerTy() && \"Can't bswap a non-integer type!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn223349/lib/CodeGen/IntrinsicLowering.cpp"
, 167, __PRETTY_FUNCTION__));
168
169 unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
170
171 IRBuilder<> Builder(IP->getParent(), IP);
172
173 switch(BitSize) {
174 default: llvm_unreachable("Unhandled type size of value to byteswap!")::llvm::llvm_unreachable_internal("Unhandled type size of value to byteswap!"
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn223349/lib/CodeGen/IntrinsicLowering.cpp"
, 174);
175 case 16: {
176 Value *Tmp1 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 8),
177 "bswap.2");
178 Value *Tmp2 = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 8),
179 "bswap.1");
180 V = Builder.CreateOr(Tmp1, Tmp2, "bswap.i16");
181 break;
182 }
183 case 32: {
184 Value *Tmp4 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 24),
185 "bswap.4");
186 Value *Tmp3 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 8),
187 "bswap.3");
188 Value *Tmp2 = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 8),
189 "bswap.2");
190 Value *Tmp1 = Builder.CreateLShr(V,ConstantInt::get(V->getType(), 24),
191 "bswap.1");
192 Tmp3 = Builder.CreateAnd(Tmp3,
193 ConstantInt::get(Type::getInt32Ty(Context), 0xFF0000),
194 "bswap.and3");
195 Tmp2 = Builder.CreateAnd(Tmp2,
196 ConstantInt::get(Type::getInt32Ty(Context), 0xFF00),
197 "bswap.and2");
198 Tmp4 = Builder.CreateOr(Tmp4, Tmp3, "bswap.or1");
199 Tmp2 = Builder.CreateOr(Tmp2, Tmp1, "bswap.or2");
200 V = Builder.CreateOr(Tmp4, Tmp2, "bswap.i32");
201 break;
202 }
203 case 64: {
204 Value *Tmp8 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 56),
205 "bswap.8");
206 Value *Tmp7 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 40),
207 "bswap.7");
208 Value *Tmp6 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 24),
209 "bswap.6");
210 Value *Tmp5 = Builder.CreateShl(V, ConstantInt::get(V->getType(), 8),
211 "bswap.5");
212 Value* Tmp4 = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 8),
213 "bswap.4");
214 Value* Tmp3 = Builder.CreateLShr(V,
215 ConstantInt::get(V->getType(), 24),
216 "bswap.3");
217 Value* Tmp2 = Builder.CreateLShr(V,
218 ConstantInt::get(V->getType(), 40),
219 "bswap.2");
220 Value* Tmp1 = Builder.CreateLShr(V,
221 ConstantInt::get(V->getType(), 56),
222 "bswap.1");
223 Tmp7 = Builder.CreateAnd(Tmp7,
224 ConstantInt::get(Type::getInt64Ty(Context),
225 0xFF000000000000ULL),
226 "bswap.and7");
227 Tmp6 = Builder.CreateAnd(Tmp6,
228 ConstantInt::get(Type::getInt64Ty(Context),
229 0xFF0000000000ULL),
230 "bswap.and6");
231 Tmp5 = Builder.CreateAnd(Tmp5,
232 ConstantInt::get(Type::getInt64Ty(Context),
233 0xFF00000000ULL),
234 "bswap.and5");
235 Tmp4 = Builder.CreateAnd(Tmp4,
236 ConstantInt::get(Type::getInt64Ty(Context),
237 0xFF000000ULL),
238 "bswap.and4");
239 Tmp3 = Builder.CreateAnd(Tmp3,
240 ConstantInt::get(Type::getInt64Ty(Context),
241 0xFF0000ULL),
242 "bswap.and3");
243 Tmp2 = Builder.CreateAnd(Tmp2,
244 ConstantInt::get(Type::getInt64Ty(Context),
245 0xFF00ULL),
246 "bswap.and2");
247 Tmp8 = Builder.CreateOr(Tmp8, Tmp7, "bswap.or1");
248 Tmp6 = Builder.CreateOr(Tmp6, Tmp5, "bswap.or2");
249 Tmp4 = Builder.CreateOr(Tmp4, Tmp3, "bswap.or3");
250 Tmp2 = Builder.CreateOr(Tmp2, Tmp1, "bswap.or4");
251 Tmp8 = Builder.CreateOr(Tmp8, Tmp6, "bswap.or5");
252 Tmp4 = Builder.CreateOr(Tmp4, Tmp2, "bswap.or6");
253 V = Builder.CreateOr(Tmp8, Tmp4, "bswap.i64");
254 break;
255 }
256 }
257 return V;
258}
259
260/// LowerCTPOP - Emit the code to lower ctpop of V before the specified
261/// instruction IP.
262static Value *LowerCTPOP(LLVMContext &Context, Value *V, Instruction *IP) {
263 assert(V->getType()->isIntegerTy() && "Can't ctpop a non-integer type!")((V->getType()->isIntegerTy() && "Can't ctpop a non-integer type!"
) ? static_cast<void> (0) : __assert_fail ("V->getType()->isIntegerTy() && \"Can't ctpop a non-integer type!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn223349/lib/CodeGen/IntrinsicLowering.cpp"
, 263, __PRETTY_FUNCTION__));
264
265 static const uint64_t MaskValues[6] = {
266 0x5555555555555555ULL, 0x3333333333333333ULL,
267 0x0F0F0F0F0F0F0F0FULL, 0x00FF00FF00FF00FFULL,
268 0x0000FFFF0000FFFFULL, 0x00000000FFFFFFFFULL
269 };
270
271 IRBuilder<> Builder(IP->getParent(), IP);
272
273 unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
274 unsigned WordSize = (BitSize + 63) / 64;
275 Value *Count = ConstantInt::get(V->getType(), 0);
276
277 for (unsigned n = 0; n < WordSize; ++n) {
278 Value *PartValue = V;
279 for (unsigned i = 1, ct = 0; i < (BitSize>64 ? 64 : BitSize);
280 i <<= 1, ++ct) {
281 Value *MaskCst = ConstantInt::get(V->getType(), MaskValues[ct]);
282 Value *LHS = Builder.CreateAnd(PartValue, MaskCst, "cppop.and1");
283 Value *VShift = Builder.CreateLShr(PartValue,
284 ConstantInt::get(V->getType(), i),
285 "ctpop.sh");
286 Value *RHS = Builder.CreateAnd(VShift, MaskCst, "cppop.and2");
287 PartValue = Builder.CreateAdd(LHS, RHS, "ctpop.step");
288 }
289 Count = Builder.CreateAdd(PartValue, Count, "ctpop.part");
290 if (BitSize > 64) {
291 V = Builder.CreateLShr(V, ConstantInt::get(V->getType(), 64),
292 "ctpop.part.sh");
293 BitSize -= 64;
294 }
295 }
296
297 return Count;
298}
299
300/// LowerCTLZ - Emit the code to lower ctlz of V before the specified
301/// instruction IP.
302static Value *LowerCTLZ(LLVMContext &Context, Value *V, Instruction *IP) {
303
304 IRBuilder<> Builder(IP->getParent(), IP);
305
306 unsigned BitSize = V->getType()->getPrimitiveSizeInBits();
307 for (unsigned i = 1; i < BitSize; i <<= 1) {
308 Value *ShVal = ConstantInt::get(V->getType(), i);
309 ShVal = Builder.CreateLShr(V, ShVal, "ctlz.sh");
310 V = Builder.CreateOr(V, ShVal, "ctlz.step");
311 }
312
313 V = Builder.CreateNot(V);
314 return LowerCTPOP(Context, V, IP);
315}
316
317static void ReplaceFPIntrinsicWithCall(CallInst *CI, const char *Fname,
318 const char *Dname,
319 const char *LDname) {
320 CallSite CS(CI);
321 switch (CI->getArgOperand(0)->getType()->getTypeID()) {
322 default: llvm_unreachable("Invalid type in intrinsic")::llvm::llvm_unreachable_internal("Invalid type in intrinsic"
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn223349/lib/CodeGen/IntrinsicLowering.cpp"
, 322);
323 case Type::FloatTyID:
324 ReplaceCallWith(Fname, CI, CS.arg_begin(), CS.arg_end(),
325 Type::getFloatTy(CI->getContext()));
326 break;
327 case Type::DoubleTyID:
328 ReplaceCallWith(Dname, CI, CS.arg_begin(), CS.arg_end(),
329 Type::getDoubleTy(CI->getContext()));
330 break;
331 case Type::X86_FP80TyID:
332 case Type::FP128TyID:
333 case Type::PPC_FP128TyID:
334 ReplaceCallWith(LDname, CI, CS.arg_begin(), CS.arg_end(),
335 CI->getArgOperand(0)->getType());
336 break;
337 }
338}
339
340void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
341 IRBuilder<> Builder(CI->getParent(), CI);
342 LLVMContext &Context = CI->getContext();
343
344 const Function *Callee = CI->getCalledFunction();
345 assert(Callee && "Cannot lower an indirect call!")((Callee && "Cannot lower an indirect call!") ? static_cast
<void> (0) : __assert_fail ("Callee && \"Cannot lower an indirect call!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn223349/lib/CodeGen/IntrinsicLowering.cpp"
, 345, __PRETTY_FUNCTION__));
346
347 CallSite CS(CI);
348 switch (Callee->getIntrinsicID()) {
1
Control jumps to 'case memmove:' at line 477
→
349 case Intrinsic::not_intrinsic:
350 report_fatal_error("Cannot lower a call to a non-intrinsic function '"+
351 Callee->getName() + "'!");
352 default:
353 report_fatal_error("Code generator does not support intrinsic function '"+
354 Callee->getName()+"'!");
355
356 case Intrinsic::expect: {
357 // Just replace __builtin_expect(exp, c) with EXP.
358 Value *V = CI->getArgOperand(0);
359 CI->replaceAllUsesWith(V);
360 break;
361 }
362
363 // The setjmp/longjmp intrinsics should only exist in the code if it was
364 // never optimized (ie, right out of the CFE), or if it has been hacked on
365 // by the lowerinvoke pass. In both cases, the right thing to do is to
366 // convert the call to an explicit setjmp or longjmp call.
367 case Intrinsic::setjmp: {
368 Value *V = ReplaceCallWith("setjmp", CI, CS.arg_begin(), CS.arg_end(),
369 Type::getInt32Ty(Context));
370 if (!CI->getType()->isVoidTy())
371 CI->replaceAllUsesWith(V);
372 break;
373 }
374 case Intrinsic::sigsetjmp:
375 if (!CI->getType()->isVoidTy())
376 CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
377 break;
378
379 case Intrinsic::longjmp: {
380 ReplaceCallWith("longjmp", CI, CS.arg_begin(), CS.arg_end(),
381 Type::getVoidTy(Context));
382 break;
383 }
384
385 case Intrinsic::siglongjmp: {
386 // Insert the call to abort
387 ReplaceCallWith("abort", CI, CS.arg_end(), CS.arg_end(),
388 Type::getVoidTy(Context));
389 break;
390 }
391 case Intrinsic::ctpop:
392 CI->replaceAllUsesWith(LowerCTPOP(Context, CI->getArgOperand(0), CI));
393 break;
394
395 case Intrinsic::bswap:
396 CI->replaceAllUsesWith(LowerBSWAP(Context, CI->getArgOperand(0), CI));
397 break;
398
399 case Intrinsic::ctlz:
400 CI->replaceAllUsesWith(LowerCTLZ(Context, CI->getArgOperand(0), CI));
401 break;
402
403 case Intrinsic::cttz: {
404 // cttz(x) -> ctpop(~X & (X-1))
405 Value *Src = CI->getArgOperand(0);
406 Value *NotSrc = Builder.CreateNot(Src);
407 NotSrc->setName(Src->getName() + ".not");
408 Value *SrcM1 = ConstantInt::get(Src->getType(), 1);
409 SrcM1 = Builder.CreateSub(Src, SrcM1);
410 Src = LowerCTPOP(Context, Builder.CreateAnd(NotSrc, SrcM1), CI);
411 CI->replaceAllUsesWith(Src);
412 break;
413 }
414
415 case Intrinsic::stacksave:
416 case Intrinsic::stackrestore: {
417 if (!Warned)
418 errs() << "WARNING: this target does not support the llvm.stack"
419 << (Callee->getIntrinsicID() == Intrinsic::stacksave ?
420 "save" : "restore") << " intrinsic.\n";
421 Warned = true;
422 if (Callee->getIntrinsicID() == Intrinsic::stacksave)
423 CI->replaceAllUsesWith(Constant::getNullValue(CI->getType()));
424 break;
425 }
426
427 case Intrinsic::returnaddress:
428 case Intrinsic::frameaddress:
429 errs() << "WARNING: this target does not support the llvm."
430 << (Callee->getIntrinsicID() == Intrinsic::returnaddress ?
431 "return" : "frame") << "address intrinsic.\n";
432 CI->replaceAllUsesWith(ConstantPointerNull::get(
433 cast<PointerType>(CI->getType())));
434 break;
435
436 case Intrinsic::prefetch:
437 break; // Simply strip out prefetches on unsupported architectures
438
439 case Intrinsic::pcmarker:
440 break; // Simply strip out pcmarker on unsupported architectures
441 case Intrinsic::readcyclecounter: {
442 errs() << "WARNING: this target does not support the llvm.readcyclecoun"
443 << "ter intrinsic. It is being lowered to a constant 0\n";
444 CI->replaceAllUsesWith(ConstantInt::get(Type::getInt64Ty(Context), 0));
445 break;
446 }
447
448 case Intrinsic::dbg_declare:
449 break; // Simply strip out debugging intrinsics
450
451 case Intrinsic::eh_typeid_for:
452 // Return something different to eh_selector.
453 CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1));
454 break;
455
456 case Intrinsic::annotation:
457 case Intrinsic::ptr_annotation:
458 // Just drop the annotation, but forward the value
459 CI->replaceAllUsesWith(CI->getOperand(0));
460 break;
461
462 case Intrinsic::assume:
463 case Intrinsic::var_annotation:
464 break; // Strip out these intrinsics
465
466 case Intrinsic::memcpy: {
467 Type *IntPtr = DL.getIntPtrType(Context);
468 Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr,
469 /* isSigned */ false);
470 Value *Ops[3];
471 Ops[0] = CI->getArgOperand(0);
472 Ops[1] = CI->getArgOperand(1);
473 Ops[2] = Size;
474 ReplaceCallWith("memcpy", CI, Ops, Ops+3, CI->getArgOperand(0)->getType());
475 break;
476 }
477 case Intrinsic::memmove: {
478 Type *IntPtr = DL.getIntPtrType(Context);
479 Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr,
480 /* isSigned */ false);
481 Value *Ops[3];
482 Ops[0] = CI->getArgOperand(0);
483 Ops[1] = CI->getArgOperand(1);
484 Ops[2] = Size;
485 ReplaceCallWith("memmove", CI, Ops, Ops+3, CI->getArgOperand(0)->getType());
2
←
Calling 'ReplaceCallWith'
→
486 break;
487 }
488 case Intrinsic::memset: {
489 Value *Op0 = CI->getArgOperand(0);
490 Type *IntPtr = DL.getIntPtrType(Op0->getType());
491 Value *Size = Builder.CreateIntCast(CI->getArgOperand(2), IntPtr,
492 /* isSigned */ false);
493 Value *Ops[3];
494 Ops[0] = Op0;
495 // Extend the amount to i32.
496 Ops[1] = Builder.CreateIntCast(CI->getArgOperand(1),
497 Type::getInt32Ty(Context),
498 /* isSigned */ false);
499 Ops[2] = Size;
500 ReplaceCallWith("memset", CI, Ops, Ops+3, CI->getArgOperand(0)->getType());
501 break;
502 }
503 case Intrinsic::sqrt: {
504 ReplaceFPIntrinsicWithCall(CI, "sqrtf", "sqrt", "sqrtl");
505 break;
506 }
507 case Intrinsic::log: {
508 ReplaceFPIntrinsicWithCall(CI, "logf", "log", "logl");
509 break;
510 }
511 case Intrinsic::log2: {
512 ReplaceFPIntrinsicWithCall(CI, "log2f", "log2", "log2l");
513 break;
514 }
515 case Intrinsic::log10: {
516 ReplaceFPIntrinsicWithCall(CI, "log10f", "log10", "log10l");
517 break;
518 }
519 case Intrinsic::exp: {
520 ReplaceFPIntrinsicWithCall(CI, "expf", "exp", "expl");
521 break;
522 }
523 case Intrinsic::exp2: {
524 ReplaceFPIntrinsicWithCall(CI, "exp2f", "exp2", "exp2l");
525 break;
526 }
527 case Intrinsic::pow: {
528 ReplaceFPIntrinsicWithCall(CI, "powf", "pow", "powl");
529 break;
530 }
531 case Intrinsic::sin: {
532 ReplaceFPIntrinsicWithCall(CI, "sinf", "sin", "sinl");
533 break;
534 }
535 case Intrinsic::cos: {
536 ReplaceFPIntrinsicWithCall(CI, "cosf", "cos", "cosl");
537 break;
538 }
539 case Intrinsic::floor: {
540 ReplaceFPIntrinsicWithCall(CI, "floorf", "floor", "floorl");
541 break;
542 }
543 case Intrinsic::ceil: {
544 ReplaceFPIntrinsicWithCall(CI, "ceilf", "ceil", "ceill");
545 break;
546 }
547 case Intrinsic::trunc: {
548 ReplaceFPIntrinsicWithCall(CI, "truncf", "trunc", "truncl");
549 break;
550 }
551 case Intrinsic::round: {
552 ReplaceFPIntrinsicWithCall(CI, "roundf", "round", "roundl");
553 break;
554 }
555 case Intrinsic::copysign: {
556 ReplaceFPIntrinsicWithCall(CI, "copysignf", "copysign", "copysignl");
557 break;
558 }
559 case Intrinsic::flt_rounds:
560 // Lower to "round to the nearest"
561 if (!CI->getType()->isVoidTy())
562 CI->replaceAllUsesWith(ConstantInt::get(CI->getType(), 1));
563 break;
564 case Intrinsic::invariant_start:
565 case Intrinsic::lifetime_start:
566 // Discard region information.
567 CI->replaceAllUsesWith(UndefValue::get(CI->getType()));
568 break;
569 case Intrinsic::invariant_end:
570 case Intrinsic::lifetime_end:
571 // Discard region information.
572 break;
573 }
574
575 assert(CI->use_empty() &&((CI->use_empty() && "Lowering should have eliminated any uses of the intrinsic call!"
) ? static_cast<void> (0) : __assert_fail ("CI->use_empty() && \"Lowering should have eliminated any uses of the intrinsic call!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn223349/lib/CodeGen/IntrinsicLowering.cpp"
, 576, __PRETTY_FUNCTION__))
576 "Lowering should have eliminated any uses of the intrinsic call!")((CI->use_empty() && "Lowering should have eliminated any uses of the intrinsic call!"
) ? static_cast<void> (0) : __assert_fail ("CI->use_empty() && \"Lowering should have eliminated any uses of the intrinsic call!\""
, "/tmp/buildd/llvm-toolchain-snapshot-3.6~svn223349/lib/CodeGen/IntrinsicLowering.cpp"
, 576, __PRETTY_FUNCTION__));
577 CI->eraseFromParent();
578}
579
580bool IntrinsicLowering::LowerToByteSwap(CallInst *CI) {
581 // Verify this is a simple bswap.
582 if (CI->getNumArgOperands() != 1 ||
583 CI->getType() != CI->getArgOperand(0)->getType() ||
584 !CI->getType()->isIntegerTy())
585 return false;
586
587 IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
588 if (!Ty)
589 return false;
590
591 // Okay, we can do this xform, do so now.
592 Module *M = CI->getParent()->getParent()->getParent();
593 Constant *Int = Intrinsic::getDeclaration(M, Intrinsic::bswap, Ty);
594
595 Value *Op = CI->getArgOperand(0);
596 Op = CallInst::Create(Int, Op, CI->getName(), CI);
597
598 CI->replaceAllUsesWith(Op);
599 CI->eraseFromParent();
600 return true;
601}