Bug Summary

File:lib/Target/AMDGPU/AMDGPULibCalls.cpp
Warning:line 1645, column 13
2nd function call argument is an uninitialized value

Annotated Source Code

Press '?' to see keyboard shortcuts

clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name AMDGPULibCalls.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-eagerly-assume -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-7/lib/clang/7.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/lib/Target/AMDGPU -I /build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn338205/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/include -internal-externc-isystem /usr/lib/gcc/x86_64-linux-gnu/8/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/lib/Target/AMDGPU -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-07-29-043837-17923-1 -x c++ /build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp -faddrsig
1//===- AMDGPULibCalls.cpp -------------------------------------------------===//
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/// \file
11/// This file does AMD library function optimizations.
12//
13//===----------------------------------------------------------------------===//
14
15#define DEBUG_TYPE"amdgpu-simplifylib" "amdgpu-simplifylib"
16
17#include "AMDGPU.h"
18#include "AMDGPULibFunc.h"
19#include "llvm/Analysis/AliasAnalysis.h"
20#include "llvm/Analysis/Loads.h"
21#include "llvm/ADT/StringSet.h"
22#include "llvm/ADT/StringRef.h"
23#include "llvm/IR/Constants.h"
24#include "llvm/IR/DerivedTypes.h"
25#include "llvm/IR/Instructions.h"
26#include "llvm/IR/IRBuilder.h"
27#include "llvm/IR/Function.h"
28#include "llvm/IR/LLVMContext.h"
29#include "llvm/IR/Module.h"
30#include "llvm/IR/ValueSymbolTable.h"
31#include "llvm/Support/Debug.h"
32#include "llvm/Support/raw_ostream.h"
33#include "llvm/Target/TargetOptions.h"
34#include <vector>
35#include <cmath>
36
37using namespace llvm;
38
39static cl::opt<bool> EnablePreLink("amdgpu-prelink",
40 cl::desc("Enable pre-link mode optimizations"),
41 cl::init(false),
42 cl::Hidden);
43
44static cl::list<std::string> UseNative("amdgpu-use-native",
45 cl::desc("Comma separated list of functions to replace with native, or all"),
46 cl::CommaSeparated, cl::ValueOptional,
47 cl::Hidden);
48
49#define MATH_PI3.14159265358979323846264338327950288419716939937511 3.14159265358979323846264338327950288419716939937511
50#define MATH_E2.71828182845904523536028747135266249775724709369996 2.71828182845904523536028747135266249775724709369996
51#define MATH_SQRT21.41421356237309504880168872420969807856967187537695 1.41421356237309504880168872420969807856967187537695
52
53#define MATH_LOG2E1.4426950408889634073599246810018921374266459541529859 1.4426950408889634073599246810018921374266459541529859
54#define MATH_LOG10E0.4342944819032518276511289189166050822943970058036665 0.4342944819032518276511289189166050822943970058036665
55// Value of log2(10)
56#define MATH_LOG2_103.3219280948873623478703194294893901758648313930245806 3.3219280948873623478703194294893901758648313930245806
57// Value of 1 / log2(10)
58#define MATH_RLOG2_100.3010299956639811952137388947244930267681898814621085 0.3010299956639811952137388947244930267681898814621085
59// Value of 1 / M_LOG2E_F = 1 / log2(e)
60#define MATH_RLOG2_E0.6931471805599453094172321214581765680755001343602552 0.6931471805599453094172321214581765680755001343602552
61
62namespace llvm {
63
64class AMDGPULibCalls {
65private:
66
67 typedef llvm::AMDGPULibFunc FuncInfo;
68
69 // -fuse-native.
70 bool AllNative = false;
71
72 bool useNativeFunc(const StringRef F) const;
73
74 // Return a pointer (pointer expr) to the function if function defintion with
75 // "FuncName" exists. It may create a new function prototype in pre-link mode.
76 Constant *getFunction(Module *M, const FuncInfo& fInfo);
77
78 // Replace a normal function with its native version.
79 bool replaceWithNative(CallInst *CI, const FuncInfo &FInfo);
80
81 bool parseFunctionName(const StringRef& FMangledName,
82 FuncInfo *FInfo=nullptr /*out*/);
83
84 bool TDOFold(CallInst *CI, const FuncInfo &FInfo);
85
86 /* Specialized optimizations */
87
88 // recip (half or native)
89 bool fold_recip(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
90
91 // divide (half or native)
92 bool fold_divide(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
93
94 // pow/powr/pown
95 bool fold_pow(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
96
97 // rootn
98 bool fold_rootn(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
99
100 // fma/mad
101 bool fold_fma_mad(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
102
103 // -fuse-native for sincos
104 bool sincosUseNative(CallInst *aCI, const FuncInfo &FInfo);
105
106 // evaluate calls if calls' arguments are constants.
107 bool evaluateScalarMathFunc(FuncInfo &FInfo, double& Res0,
108 double& Res1, Constant *copr0, Constant *copr1, Constant *copr2);
109 bool evaluateCall(CallInst *aCI, FuncInfo &FInfo);
110
111 // exp
112 bool fold_exp(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
113
114 // exp2
115 bool fold_exp2(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
116
117 // exp10
118 bool fold_exp10(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
119
120 // log
121 bool fold_log(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
122
123 // log2
124 bool fold_log2(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
125
126 // log10
127 bool fold_log10(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
128
129 // sqrt
130 bool fold_sqrt(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
131
132 // sin/cos
133 bool fold_sincos(CallInst * CI, IRBuilder<> &B, AliasAnalysis * AA);
134
135 // __read_pipe/__write_pipe
136 bool fold_read_write_pipe(CallInst *CI, IRBuilder<> &B, FuncInfo &FInfo);
137
138 // Get insertion point at entry.
139 BasicBlock::iterator getEntryIns(CallInst * UI);
140 // Insert an Alloc instruction.
141 AllocaInst* insertAlloca(CallInst * UI, IRBuilder<> &B, const char *prefix);
142 // Get a scalar native builtin signle argument FP function
143 Constant* getNativeFunction(Module* M, const FuncInfo &FInfo);
144
145protected:
146 CallInst *CI;
147
148 bool isUnsafeMath(const CallInst *CI) const;
149
150 void replaceCall(Value *With) {
151 CI->replaceAllUsesWith(With);
152 CI->eraseFromParent();
153 }
154
155public:
156 bool fold(CallInst *CI, AliasAnalysis *AA = nullptr);
157
158 void initNativeFuncs();
159
160 // Replace a normal math function call with that native version
161 bool useNative(CallInst *CI);
162};
163
164} // end llvm namespace
165
166namespace {
167
168 class AMDGPUSimplifyLibCalls : public FunctionPass {
169
170 AMDGPULibCalls Simplifier;
171
172 const TargetOptions Options;
173
174 public:
175 static char ID; // Pass identification
176
177 AMDGPUSimplifyLibCalls(const TargetOptions &Opt = TargetOptions())
178 : FunctionPass(ID), Options(Opt) {
179 initializeAMDGPUSimplifyLibCallsPass(*PassRegistry::getPassRegistry());
180 }
181
182 void getAnalysisUsage(AnalysisUsage &AU) const override {
183 AU.addRequired<AAResultsWrapperPass>();
184 }
185
186 bool runOnFunction(Function &M) override;
187 };
188
189 class AMDGPUUseNativeCalls : public FunctionPass {
190
191 AMDGPULibCalls Simplifier;
192
193 public:
194 static char ID; // Pass identification
195
196 AMDGPUUseNativeCalls() : FunctionPass(ID) {
197 initializeAMDGPUUseNativeCallsPass(*PassRegistry::getPassRegistry());
198 Simplifier.initNativeFuncs();
199 }
200
201 bool runOnFunction(Function &F) override;
202 };
203
204} // end anonymous namespace.
205
206char AMDGPUSimplifyLibCalls::ID = 0;
207char AMDGPUUseNativeCalls::ID = 0;
208
209INITIALIZE_PASS_BEGIN(AMDGPUSimplifyLibCalls, "amdgpu-simplifylib",static void *initializeAMDGPUSimplifyLibCallsPassOnce(PassRegistry
&Registry) {
210 "Simplify well-known AMD library calls", false, false)static void *initializeAMDGPUSimplifyLibCallsPassOnce(PassRegistry
&Registry) {
211INITIALIZE_PASS_DEPENDENCY(AAResultsWrapperPass)initializeAAResultsWrapperPassPass(Registry);
212INITIALIZE_PASS_END(AMDGPUSimplifyLibCalls, "amdgpu-simplifylib",PassInfo *PI = new PassInfo( "Simplify well-known AMD library calls"
, "amdgpu-simplifylib", &AMDGPUSimplifyLibCalls::ID, PassInfo
::NormalCtor_t(callDefaultCtor<AMDGPUSimplifyLibCalls>)
, false, false); Registry.registerPass(*PI, true); return PI;
} static llvm::once_flag InitializeAMDGPUSimplifyLibCallsPassFlag
; void llvm::initializeAMDGPUSimplifyLibCallsPass(PassRegistry
&Registry) { llvm::call_once(InitializeAMDGPUSimplifyLibCallsPassFlag
, initializeAMDGPUSimplifyLibCallsPassOnce, std::ref(Registry
)); }
213 "Simplify well-known AMD library calls", false, false)PassInfo *PI = new PassInfo( "Simplify well-known AMD library calls"
, "amdgpu-simplifylib", &AMDGPUSimplifyLibCalls::ID, PassInfo
::NormalCtor_t(callDefaultCtor<AMDGPUSimplifyLibCalls>)
, false, false); Registry.registerPass(*PI, true); return PI;
} static llvm::once_flag InitializeAMDGPUSimplifyLibCallsPassFlag
; void llvm::initializeAMDGPUSimplifyLibCallsPass(PassRegistry
&Registry) { llvm::call_once(InitializeAMDGPUSimplifyLibCallsPassFlag
, initializeAMDGPUSimplifyLibCallsPassOnce, std::ref(Registry
)); }
214
215INITIALIZE_PASS(AMDGPUUseNativeCalls, "amdgpu-usenative",static void *initializeAMDGPUUseNativeCallsPassOnce(PassRegistry
&Registry) { PassInfo *PI = new PassInfo( "Replace builtin math calls with that native versions."
, "amdgpu-usenative", &AMDGPUUseNativeCalls::ID, PassInfo
::NormalCtor_t(callDefaultCtor<AMDGPUUseNativeCalls>), false
, false); Registry.registerPass(*PI, true); return PI; } static
llvm::once_flag InitializeAMDGPUUseNativeCallsPassFlag; void
llvm::initializeAMDGPUUseNativeCallsPass(PassRegistry &Registry
) { llvm::call_once(InitializeAMDGPUUseNativeCallsPassFlag, initializeAMDGPUUseNativeCallsPassOnce
, std::ref(Registry)); }
216 "Replace builtin math calls with that native versions.",static void *initializeAMDGPUUseNativeCallsPassOnce(PassRegistry
&Registry) { PassInfo *PI = new PassInfo( "Replace builtin math calls with that native versions."
, "amdgpu-usenative", &AMDGPUUseNativeCalls::ID, PassInfo
::NormalCtor_t(callDefaultCtor<AMDGPUUseNativeCalls>), false
, false); Registry.registerPass(*PI, true); return PI; } static
llvm::once_flag InitializeAMDGPUUseNativeCallsPassFlag; void
llvm::initializeAMDGPUUseNativeCallsPass(PassRegistry &Registry
) { llvm::call_once(InitializeAMDGPUUseNativeCallsPassFlag, initializeAMDGPUUseNativeCallsPassOnce
, std::ref(Registry)); }
217 false, false)static void *initializeAMDGPUUseNativeCallsPassOnce(PassRegistry
&Registry) { PassInfo *PI = new PassInfo( "Replace builtin math calls with that native versions."
, "amdgpu-usenative", &AMDGPUUseNativeCalls::ID, PassInfo
::NormalCtor_t(callDefaultCtor<AMDGPUUseNativeCalls>), false
, false); Registry.registerPass(*PI, true); return PI; } static
llvm::once_flag InitializeAMDGPUUseNativeCallsPassFlag; void
llvm::initializeAMDGPUUseNativeCallsPass(PassRegistry &Registry
) { llvm::call_once(InitializeAMDGPUUseNativeCallsPassFlag, initializeAMDGPUUseNativeCallsPassOnce
, std::ref(Registry)); }
218
219template <typename IRB>
220static CallInst *CreateCallEx(IRB &B, Value *Callee, Value *Arg,
221 const Twine &Name = "") {
222 CallInst *R = B.CreateCall(Callee, Arg, Name);
223 if (Function* F = dyn_cast<Function>(Callee))
224 R->setCallingConv(F->getCallingConv());
225 return R;
226}
227
228template <typename IRB>
229static CallInst *CreateCallEx2(IRB &B, Value *Callee, Value *Arg1, Value *Arg2,
230 const Twine &Name = "") {
231 CallInst *R = B.CreateCall(Callee, {Arg1, Arg2}, Name);
232 if (Function* F = dyn_cast<Function>(Callee))
233 R->setCallingConv(F->getCallingConv());
234 return R;
235}
236
237// Data structures for table-driven optimizations.
238// FuncTbl works for both f32 and f64 functions with 1 input argument
239
240struct TableEntry {
241 double result;
242 double input;
243};
244
245/* a list of {result, input} */
246static const TableEntry tbl_acos[] = {
247 {MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, 0.0},
248 {MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, -0.0},
249 {0.0, 1.0},
250 {MATH_PI3.14159265358979323846264338327950288419716939937511, -1.0}
251};
252static const TableEntry tbl_acosh[] = {
253 {0.0, 1.0}
254};
255static const TableEntry tbl_acospi[] = {
256 {0.5, 0.0},
257 {0.5, -0.0},
258 {0.0, 1.0},
259 {1.0, -1.0}
260};
261static const TableEntry tbl_asin[] = {
262 {0.0, 0.0},
263 {-0.0, -0.0},
264 {MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, 1.0},
265 {-MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, -1.0}
266};
267static const TableEntry tbl_asinh[] = {
268 {0.0, 0.0},
269 {-0.0, -0.0}
270};
271static const TableEntry tbl_asinpi[] = {
272 {0.0, 0.0},
273 {-0.0, -0.0},
274 {0.5, 1.0},
275 {-0.5, -1.0}
276};
277static const TableEntry tbl_atan[] = {
278 {0.0, 0.0},
279 {-0.0, -0.0},
280 {MATH_PI3.14159265358979323846264338327950288419716939937511/4.0, 1.0},
281 {-MATH_PI3.14159265358979323846264338327950288419716939937511/4.0, -1.0}
282};
283static const TableEntry tbl_atanh[] = {
284 {0.0, 0.0},
285 {-0.0, -0.0}
286};
287static const TableEntry tbl_atanpi[] = {
288 {0.0, 0.0},
289 {-0.0, -0.0},
290 {0.25, 1.0},
291 {-0.25, -1.0}
292};
293static const TableEntry tbl_cbrt[] = {
294 {0.0, 0.0},
295 {-0.0, -0.0},
296 {1.0, 1.0},
297 {-1.0, -1.0},
298};
299static const TableEntry tbl_cos[] = {
300 {1.0, 0.0},
301 {1.0, -0.0}
302};
303static const TableEntry tbl_cosh[] = {
304 {1.0, 0.0},
305 {1.0, -0.0}
306};
307static const TableEntry tbl_cospi[] = {
308 {1.0, 0.0},
309 {1.0, -0.0}
310};
311static const TableEntry tbl_erfc[] = {
312 {1.0, 0.0},
313 {1.0, -0.0}
314};
315static const TableEntry tbl_erf[] = {
316 {0.0, 0.0},
317 {-0.0, -0.0}
318};
319static const TableEntry tbl_exp[] = {
320 {1.0, 0.0},
321 {1.0, -0.0},
322 {MATH_E2.71828182845904523536028747135266249775724709369996, 1.0}
323};
324static const TableEntry tbl_exp2[] = {
325 {1.0, 0.0},
326 {1.0, -0.0},
327 {2.0, 1.0}
328};
329static const TableEntry tbl_exp10[] = {
330 {1.0, 0.0},
331 {1.0, -0.0},
332 {10.0, 1.0}
333};
334static const TableEntry tbl_expm1[] = {
335 {0.0, 0.0},
336 {-0.0, -0.0}
337};
338static const TableEntry tbl_log[] = {
339 {0.0, 1.0},
340 {1.0, MATH_E2.71828182845904523536028747135266249775724709369996}
341};
342static const TableEntry tbl_log2[] = {
343 {0.0, 1.0},
344 {1.0, 2.0}
345};
346static const TableEntry tbl_log10[] = {
347 {0.0, 1.0},
348 {1.0, 10.0}
349};
350static const TableEntry tbl_rsqrt[] = {
351 {1.0, 1.0},
352 {1.0/MATH_SQRT21.41421356237309504880168872420969807856967187537695, 2.0}
353};
354static const TableEntry tbl_sin[] = {
355 {0.0, 0.0},
356 {-0.0, -0.0}
357};
358static const TableEntry tbl_sinh[] = {
359 {0.0, 0.0},
360 {-0.0, -0.0}
361};
362static const TableEntry tbl_sinpi[] = {
363 {0.0, 0.0},
364 {-0.0, -0.0}
365};
366static const TableEntry tbl_sqrt[] = {
367 {0.0, 0.0},
368 {1.0, 1.0},
369 {MATH_SQRT21.41421356237309504880168872420969807856967187537695, 2.0}
370};
371static const TableEntry tbl_tan[] = {
372 {0.0, 0.0},
373 {-0.0, -0.0}
374};
375static const TableEntry tbl_tanh[] = {
376 {0.0, 0.0},
377 {-0.0, -0.0}
378};
379static const TableEntry tbl_tanpi[] = {
380 {0.0, 0.0},
381 {-0.0, -0.0}
382};
383static const TableEntry tbl_tgamma[] = {
384 {1.0, 1.0},
385 {1.0, 2.0},
386 {2.0, 3.0},
387 {6.0, 4.0}
388};
389
390static bool HasNative(AMDGPULibFunc::EFuncId id) {
391 switch(id) {
392 case AMDGPULibFunc::EI_DIVIDE:
393 case AMDGPULibFunc::EI_COS:
394 case AMDGPULibFunc::EI_EXP:
395 case AMDGPULibFunc::EI_EXP2:
396 case AMDGPULibFunc::EI_EXP10:
397 case AMDGPULibFunc::EI_LOG:
398 case AMDGPULibFunc::EI_LOG2:
399 case AMDGPULibFunc::EI_LOG10:
400 case AMDGPULibFunc::EI_POWR:
401 case AMDGPULibFunc::EI_RECIP:
402 case AMDGPULibFunc::EI_RSQRT:
403 case AMDGPULibFunc::EI_SIN:
404 case AMDGPULibFunc::EI_SINCOS:
405 case AMDGPULibFunc::EI_SQRT:
406 case AMDGPULibFunc::EI_TAN:
407 return true;
408 default:;
409 }
410 return false;
411}
412
413struct TableRef {
414 size_t size;
415 const TableEntry *table; // variable size: from 0 to (size - 1)
416
417 TableRef() : size(0), table(nullptr) {}
418
419 template <size_t N>
420 TableRef(const TableEntry (&tbl)[N]) : size(N), table(&tbl[0]) {}
421};
422
423static TableRef getOptTable(AMDGPULibFunc::EFuncId id) {
424 switch(id) {
425 case AMDGPULibFunc::EI_ACOS: return TableRef(tbl_acos);
426 case AMDGPULibFunc::EI_ACOSH: return TableRef(tbl_acosh);
427 case AMDGPULibFunc::EI_ACOSPI: return TableRef(tbl_acospi);
428 case AMDGPULibFunc::EI_ASIN: return TableRef(tbl_asin);
429 case AMDGPULibFunc::EI_ASINH: return TableRef(tbl_asinh);
430 case AMDGPULibFunc::EI_ASINPI: return TableRef(tbl_asinpi);
431 case AMDGPULibFunc::EI_ATAN: return TableRef(tbl_atan);
432 case AMDGPULibFunc::EI_ATANH: return TableRef(tbl_atanh);
433 case AMDGPULibFunc::EI_ATANPI: return TableRef(tbl_atanpi);
434 case AMDGPULibFunc::EI_CBRT: return TableRef(tbl_cbrt);
435 case AMDGPULibFunc::EI_NCOS:
436 case AMDGPULibFunc::EI_COS: return TableRef(tbl_cos);
437 case AMDGPULibFunc::EI_COSH: return TableRef(tbl_cosh);
438 case AMDGPULibFunc::EI_COSPI: return TableRef(tbl_cospi);
439 case AMDGPULibFunc::EI_ERFC: return TableRef(tbl_erfc);
440 case AMDGPULibFunc::EI_ERF: return TableRef(tbl_erf);
441 case AMDGPULibFunc::EI_EXP: return TableRef(tbl_exp);
442 case AMDGPULibFunc::EI_NEXP2:
443 case AMDGPULibFunc::EI_EXP2: return TableRef(tbl_exp2);
444 case AMDGPULibFunc::EI_EXP10: return TableRef(tbl_exp10);
445 case AMDGPULibFunc::EI_EXPM1: return TableRef(tbl_expm1);
446 case AMDGPULibFunc::EI_LOG: return TableRef(tbl_log);
447 case AMDGPULibFunc::EI_NLOG2:
448 case AMDGPULibFunc::EI_LOG2: return TableRef(tbl_log2);
449 case AMDGPULibFunc::EI_LOG10: return TableRef(tbl_log10);
450 case AMDGPULibFunc::EI_NRSQRT:
451 case AMDGPULibFunc::EI_RSQRT: return TableRef(tbl_rsqrt);
452 case AMDGPULibFunc::EI_NSIN:
453 case AMDGPULibFunc::EI_SIN: return TableRef(tbl_sin);
454 case AMDGPULibFunc::EI_SINH: return TableRef(tbl_sinh);
455 case AMDGPULibFunc::EI_SINPI: return TableRef(tbl_sinpi);
456 case AMDGPULibFunc::EI_NSQRT:
457 case AMDGPULibFunc::EI_SQRT: return TableRef(tbl_sqrt);
458 case AMDGPULibFunc::EI_TAN: return TableRef(tbl_tan);
459 case AMDGPULibFunc::EI_TANH: return TableRef(tbl_tanh);
460 case AMDGPULibFunc::EI_TANPI: return TableRef(tbl_tanpi);
461 case AMDGPULibFunc::EI_TGAMMA: return TableRef(tbl_tgamma);
462 default:;
463 }
464 return TableRef();
465}
466
467static inline int getVecSize(const AMDGPULibFunc& FInfo) {
468 return FInfo.getLeads()[0].VectorSize;
469}
470
471static inline AMDGPULibFunc::EType getArgType(const AMDGPULibFunc& FInfo) {
472 return (AMDGPULibFunc::EType)FInfo.getLeads()[0].ArgType;
473}
474
475Constant *AMDGPULibCalls::getFunction(Module *M, const FuncInfo& fInfo) {
476 // If we are doing PreLinkOpt, the function is external. So it is safe to
477 // use getOrInsertFunction() at this stage.
478
479 return EnablePreLink ? AMDGPULibFunc::getOrInsertFunction(M, fInfo)
480 : AMDGPULibFunc::getFunction(M, fInfo);
481}
482
483bool AMDGPULibCalls::parseFunctionName(const StringRef& FMangledName,
484 FuncInfo *FInfo) {
485 return AMDGPULibFunc::parse(FMangledName, *FInfo);
486}
487
488bool AMDGPULibCalls::isUnsafeMath(const CallInst *CI) const {
489 if (auto Op = dyn_cast<FPMathOperator>(CI))
490 if (Op->isFast())
491 return true;
492 const Function *F = CI->getParent()->getParent();
493 Attribute Attr = F->getFnAttribute("unsafe-fp-math");
494 return Attr.getValueAsString() == "true";
495}
496
497bool AMDGPULibCalls::useNativeFunc(const StringRef F) const {
498 return AllNative ||
499 std::find(UseNative.begin(), UseNative.end(), F) != UseNative.end();
500}
501
502void AMDGPULibCalls::initNativeFuncs() {
503 AllNative = useNativeFunc("all") ||
504 (UseNative.getNumOccurrences() && UseNative.size() == 1 &&
505 UseNative.begin()->empty());
506}
507
508bool AMDGPULibCalls::sincosUseNative(CallInst *aCI, const FuncInfo &FInfo) {
509 bool native_sin = useNativeFunc("sin");
510 bool native_cos = useNativeFunc("cos");
511
512 if (native_sin && native_cos) {
513 Module *M = aCI->getModule();
514 Value *opr0 = aCI->getArgOperand(0);
515
516 AMDGPULibFunc nf;
517 nf.getLeads()[0].ArgType = FInfo.getLeads()[0].ArgType;
518 nf.getLeads()[0].VectorSize = FInfo.getLeads()[0].VectorSize;
519
520 nf.setPrefix(AMDGPULibFunc::NATIVE);
521 nf.setId(AMDGPULibFunc::EI_SIN);
522 Constant *sinExpr = getFunction(M, nf);
523
524 nf.setPrefix(AMDGPULibFunc::NATIVE);
525 nf.setId(AMDGPULibFunc::EI_COS);
526 Constant *cosExpr = getFunction(M, nf);
527 if (sinExpr && cosExpr) {
528 Value *sinval = CallInst::Create(sinExpr, opr0, "splitsin", aCI);
529 Value *cosval = CallInst::Create(cosExpr, opr0, "splitcos", aCI);
530 new StoreInst(cosval, aCI->getArgOperand(1), aCI);
531
532 DEBUG_WITH_TYPE("usenative", dbgs() << "<useNative> replace " << *aCIdo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("usenative")) { dbgs() << "<useNative> replace "
<< *aCI << " with native version of sin/cos"; } }
while (false)
533 << " with native version of sin/cos")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("usenative")) { dbgs() << "<useNative> replace "
<< *aCI << " with native version of sin/cos"; } }
while (false)
;
534
535 replaceCall(sinval);
536 return true;
537 }
538 }
539 return false;
540}
541
542bool AMDGPULibCalls::useNative(CallInst *aCI) {
543 CI = aCI;
544 Function *Callee = aCI->getCalledFunction();
545
546 FuncInfo FInfo;
547 if (!parseFunctionName(Callee->getName(), &FInfo) || !FInfo.isMangled() ||
548 FInfo.getPrefix() != AMDGPULibFunc::NOPFX ||
549 getArgType(FInfo) == AMDGPULibFunc::F64 || !HasNative(FInfo.getId()) ||
550 !(AllNative || useNativeFunc(FInfo.getName()))) {
551 return false;
552 }
553
554 if (FInfo.getId() == AMDGPULibFunc::EI_SINCOS)
555 return sincosUseNative(aCI, FInfo);
556
557 FInfo.setPrefix(AMDGPULibFunc::NATIVE);
558 Constant *F = getFunction(aCI->getModule(), FInfo);
559 if (!F)
560 return false;
561
562 aCI->setCalledFunction(F);
563 DEBUG_WITH_TYPE("usenative", dbgs() << "<useNative> replace " << *aCIdo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("usenative")) { dbgs() << "<useNative> replace "
<< *aCI << " with native version"; } } while (false
)
564 << " with native version")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("usenative")) { dbgs() << "<useNative> replace "
<< *aCI << " with native version"; } } while (false
)
;
565 return true;
566}
567
568// Clang emits call of __read_pipe_2 or __read_pipe_4 for OpenCL read_pipe
569// builtin, with appended type size and alignment arguments, where 2 or 4
570// indicates the original number of arguments. The library has optimized version
571// of __read_pipe_2/__read_pipe_4 when the type size and alignment has the same
572// power of 2 value. This function transforms __read_pipe_2 to __read_pipe_2_N
573// for such cases where N is the size in bytes of the type (N = 1, 2, 4, 8, ...,
574// 128). The same for __read_pipe_4, write_pipe_2, and write_pipe_4.
575bool AMDGPULibCalls::fold_read_write_pipe(CallInst *CI, IRBuilder<> &B,
576 FuncInfo &FInfo) {
577 auto *Callee = CI->getCalledFunction();
578 if (!Callee->isDeclaration())
579 return false;
580
581 assert(Callee->hasName() && "Invalid read_pipe/write_pipe function")(static_cast <bool> (Callee->hasName() && "Invalid read_pipe/write_pipe function"
) ? void (0) : __assert_fail ("Callee->hasName() && \"Invalid read_pipe/write_pipe function\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 581, __extension__ __PRETTY_FUNCTION__))
;
582 auto *M = Callee->getParent();
583 auto &Ctx = M->getContext();
584 std::string Name = Callee->getName();
585 auto NumArg = CI->getNumArgOperands();
586 if (NumArg != 4 && NumArg != 6)
587 return false;
588 auto *PacketSize = CI->getArgOperand(NumArg - 2);
589 auto *PacketAlign = CI->getArgOperand(NumArg - 1);
590 if (!isa<ConstantInt>(PacketSize) || !isa<ConstantInt>(PacketAlign))
591 return false;
592 unsigned Size = cast<ConstantInt>(PacketSize)->getZExtValue();
593 unsigned Align = cast<ConstantInt>(PacketAlign)->getZExtValue();
594 if (Size != Align || !isPowerOf2_32(Size))
595 return false;
596
597 Type *PtrElemTy;
598 if (Size <= 8)
599 PtrElemTy = Type::getIntNTy(Ctx, Size * 8);
600 else
601 PtrElemTy = VectorType::get(Type::getInt64Ty(Ctx), Size / 8);
602 unsigned PtrArgLoc = CI->getNumArgOperands() - 3;
603 auto PtrArg = CI->getArgOperand(PtrArgLoc);
604 unsigned PtrArgAS = PtrArg->getType()->getPointerAddressSpace();
605 auto *PtrTy = llvm::PointerType::get(PtrElemTy, PtrArgAS);
606
607 SmallVector<llvm::Type *, 6> ArgTys;
608 for (unsigned I = 0; I != PtrArgLoc; ++I)
609 ArgTys.push_back(CI->getArgOperand(I)->getType());
610 ArgTys.push_back(PtrTy);
611
612 Name = Name + "_" + std::to_string(Size);
613 auto *FTy = FunctionType::get(Callee->getReturnType(),
614 ArrayRef<Type *>(ArgTys), false);
615 AMDGPULibFunc NewLibFunc(Name, FTy);
616 auto *F = AMDGPULibFunc::getOrInsertFunction(M, NewLibFunc);
617 if (!F)
618 return false;
619
620 auto *BCast = B.CreatePointerCast(PtrArg, PtrTy);
621 SmallVector<Value *, 6> Args;
622 for (unsigned I = 0; I != PtrArgLoc; ++I)
623 Args.push_back(CI->getArgOperand(I));
624 Args.push_back(BCast);
625
626 auto *NCI = B.CreateCall(F, Args);
627 NCI->setAttributes(CI->getAttributes());
628 CI->replaceAllUsesWith(NCI);
629 CI->dropAllReferences();
630 CI->eraseFromParent();
631
632 return true;
633}
634
635// This function returns false if no change; return true otherwise.
636bool AMDGPULibCalls::fold(CallInst *CI, AliasAnalysis *AA) {
637 this->CI = CI;
638 Function *Callee = CI->getCalledFunction();
639
640 // Ignore indirect calls.
641 if (Callee == 0) return false;
11
Assuming 'Callee' is not equal to null
12
Taking false branch
642
643 FuncInfo FInfo;
644 if (!parseFunctionName(Callee->getName(), &FInfo))
13
Assuming the condition is false
14
Taking false branch
645 return false;
646
647 // Further check the number of arguments to see if they match.
648 if (CI->getNumArgOperands() != FInfo.getNumArgs())
15
Assuming the condition is false
16
Taking false branch
649 return false;
650
651 BasicBlock *BB = CI->getParent();
652 LLVMContext &Context = CI->getParent()->getContext();
653 IRBuilder<> B(Context);
654
655 // Set the builder to the instruction after the call.
656 B.SetInsertPoint(BB, CI->getIterator());
657
658 // Copy fast flags from the original call.
659 if (const FPMathOperator *FPOp = dyn_cast<const FPMathOperator>(CI))
17
Taking false branch
660 B.setFastMathFlags(FPOp->getFastMathFlags());
661
662 if (TDOFold(CI, FInfo))
18
Taking false branch
663 return true;
664
665 // Under unsafe-math, evaluate calls if possible.
666 // According to Brian Sumner, we can do this for all f32 function calls
667 // using host's double function calls.
668 if (isUnsafeMath(CI) && evaluateCall(CI, FInfo))
19
Assuming the condition is true
20
Calling 'AMDGPULibCalls::evaluateCall'
669 return true;
670
671 // Specilized optimizations for each function call
672 switch (FInfo.getId()) {
673 case AMDGPULibFunc::EI_RECIP:
674 // skip vector function
675 assert ((FInfo.getPrefix() == AMDGPULibFunc::NATIVE ||(static_cast <bool> ((FInfo.getPrefix() == AMDGPULibFunc
::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) &&
"recip must be an either native or half function") ? void (0
) : __assert_fail ("(FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) && \"recip must be an either native or half function\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 677, __extension__ __PRETTY_FUNCTION__))
676 FInfo.getPrefix() == AMDGPULibFunc::HALF) &&(static_cast <bool> ((FInfo.getPrefix() == AMDGPULibFunc
::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) &&
"recip must be an either native or half function") ? void (0
) : __assert_fail ("(FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) && \"recip must be an either native or half function\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 677, __extension__ __PRETTY_FUNCTION__))
677 "recip must be an either native or half function")(static_cast <bool> ((FInfo.getPrefix() == AMDGPULibFunc
::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) &&
"recip must be an either native or half function") ? void (0
) : __assert_fail ("(FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) && \"recip must be an either native or half function\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 677, __extension__ __PRETTY_FUNCTION__))
;
678 return (getVecSize(FInfo) != 1) ? false : fold_recip(CI, B, FInfo);
679
680 case AMDGPULibFunc::EI_DIVIDE:
681 // skip vector function
682 assert ((FInfo.getPrefix() == AMDGPULibFunc::NATIVE ||(static_cast <bool> ((FInfo.getPrefix() == AMDGPULibFunc
::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) &&
"divide must be an either native or half function") ? void (
0) : __assert_fail ("(FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) && \"divide must be an either native or half function\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 684, __extension__ __PRETTY_FUNCTION__))
683 FInfo.getPrefix() == AMDGPULibFunc::HALF) &&(static_cast <bool> ((FInfo.getPrefix() == AMDGPULibFunc
::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) &&
"divide must be an either native or half function") ? void (
0) : __assert_fail ("(FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) && \"divide must be an either native or half function\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 684, __extension__ __PRETTY_FUNCTION__))
684 "divide must be an either native or half function")(static_cast <bool> ((FInfo.getPrefix() == AMDGPULibFunc
::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) &&
"divide must be an either native or half function") ? void (
0) : __assert_fail ("(FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix() == AMDGPULibFunc::HALF) && \"divide must be an either native or half function\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 684, __extension__ __PRETTY_FUNCTION__))
;
685 return (getVecSize(FInfo) != 1) ? false : fold_divide(CI, B, FInfo);
686
687 case AMDGPULibFunc::EI_POW:
688 case AMDGPULibFunc::EI_POWR:
689 case AMDGPULibFunc::EI_POWN:
690 return fold_pow(CI, B, FInfo);
691
692 case AMDGPULibFunc::EI_ROOTN:
693 // skip vector function
694 return (getVecSize(FInfo) != 1) ? false : fold_rootn(CI, B, FInfo);
695
696 case AMDGPULibFunc::EI_FMA:
697 case AMDGPULibFunc::EI_MAD:
698 case AMDGPULibFunc::EI_NFMA:
699 // skip vector function
700 return (getVecSize(FInfo) != 1) ? false : fold_fma_mad(CI, B, FInfo);
701
702 case AMDGPULibFunc::EI_SQRT:
703 return isUnsafeMath(CI) && fold_sqrt(CI, B, FInfo);
704 case AMDGPULibFunc::EI_COS:
705 case AMDGPULibFunc::EI_SIN:
706 if ((getArgType(FInfo) == AMDGPULibFunc::F32 ||
707 getArgType(FInfo) == AMDGPULibFunc::F64)
708 && (FInfo.getPrefix() == AMDGPULibFunc::NOPFX))
709 return fold_sincos(CI, B, AA);
710
711 break;
712 case AMDGPULibFunc::EI_READ_PIPE_2:
713 case AMDGPULibFunc::EI_READ_PIPE_4:
714 case AMDGPULibFunc::EI_WRITE_PIPE_2:
715 case AMDGPULibFunc::EI_WRITE_PIPE_4:
716 return fold_read_write_pipe(CI, B, FInfo);
717
718 default:
719 break;
720 }
721
722 return false;
723}
724
725bool AMDGPULibCalls::TDOFold(CallInst *CI, const FuncInfo &FInfo) {
726 // Table-Driven optimization
727 const TableRef tr = getOptTable(FInfo.getId());
728 if (tr.size==0)
729 return false;
730
731 int const sz = (int)tr.size;
732 const TableEntry * const ftbl = tr.table;
733 Value *opr0 = CI->getArgOperand(0);
734
735 if (getVecSize(FInfo) > 1) {
736 if (ConstantDataVector *CV = dyn_cast<ConstantDataVector>(opr0)) {
737 SmallVector<double, 0> DVal;
738 for (int eltNo = 0; eltNo < getVecSize(FInfo); ++eltNo) {
739 ConstantFP *eltval = dyn_cast<ConstantFP>(
740 CV->getElementAsConstant((unsigned)eltNo));
741 assert(eltval && "Non-FP arguments in math function!")(static_cast <bool> (eltval && "Non-FP arguments in math function!"
) ? void (0) : __assert_fail ("eltval && \"Non-FP arguments in math function!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 741, __extension__ __PRETTY_FUNCTION__))
;
742 bool found = false;
743 for (int i=0; i < sz; ++i) {
744 if (eltval->isExactlyValue(ftbl[i].input)) {
745 DVal.push_back(ftbl[i].result);
746 found = true;
747 break;
748 }
749 }
750 if (!found) {
751 // This vector constants not handled yet.
752 return false;
753 }
754 }
755 LLVMContext &context = CI->getParent()->getParent()->getContext();
756 Constant *nval;
757 if (getArgType(FInfo) == AMDGPULibFunc::F32) {
758 SmallVector<float, 0> FVal;
759 for (unsigned i = 0; i < DVal.size(); ++i) {
760 FVal.push_back((float)DVal[i]);
761 }
762 ArrayRef<float> tmp(FVal);
763 nval = ConstantDataVector::get(context, tmp);
764 } else { // F64
765 ArrayRef<double> tmp(DVal);
766 nval = ConstantDataVector::get(context, tmp);
767 }
768 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *nval << "\n"; } } while
(false)
;
769 replaceCall(nval);
770 return true;
771 }
772 } else {
773 // Scalar version
774 if (ConstantFP *CF = dyn_cast<ConstantFP>(opr0)) {
775 for (int i = 0; i < sz; ++i) {
776 if (CF->isExactlyValue(ftbl[i].input)) {
777 Value *nval = ConstantFP::get(CF->getType(), ftbl[i].result);
778 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *nval << "\n"; } } while
(false)
;
779 replaceCall(nval);
780 return true;
781 }
782 }
783 }
784 }
785
786 return false;
787}
788
789bool AMDGPULibCalls::replaceWithNative(CallInst *CI, const FuncInfo &FInfo) {
790 Module *M = CI->getModule();
791 if (getArgType(FInfo) != AMDGPULibFunc::F32 ||
792 FInfo.getPrefix() != AMDGPULibFunc::NOPFX ||
793 !HasNative(FInfo.getId()))
794 return false;
795
796 AMDGPULibFunc nf = FInfo;
797 nf.setPrefix(AMDGPULibFunc::NATIVE);
798 if (Constant *FPExpr = getFunction(M, nf)) {
799 LLVM_DEBUG(dbgs() << "AMDIC: " << *CI << " ---> ")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { dbgs() << "AMDIC: " << *
CI << " ---> "; } } while (false)
;
800
801 CI->setCalledFunction(FPExpr);
802
803 LLVM_DEBUG(dbgs() << *CI << '\n')do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { dbgs() << *CI << '\n'; }
} while (false)
;
804
805 return true;
806 }
807 return false;
808}
809
810// [native_]half_recip(c) ==> 1.0/c
811bool AMDGPULibCalls::fold_recip(CallInst *CI, IRBuilder<> &B,
812 const FuncInfo &FInfo) {
813 Value *opr0 = CI->getArgOperand(0);
814 if (ConstantFP *CF = dyn_cast<ConstantFP>(opr0)) {
815 // Just create a normal div. Later, InstCombine will be able
816 // to compute the divide into a constant (avoid check float infinity
817 // or subnormal at this point).
818 Value *nval = B.CreateFDiv(ConstantFP::get(CF->getType(), 1.0),
819 opr0,
820 "recip2div");
821 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *nval << "\n"; } } while
(false)
;
822 replaceCall(nval);
823 return true;
824 }
825 return false;
826}
827
828// [native_]half_divide(x, c) ==> x/c
829bool AMDGPULibCalls::fold_divide(CallInst *CI, IRBuilder<> &B,
830 const FuncInfo &FInfo) {
831 Value *opr0 = CI->getArgOperand(0);
832 Value *opr1 = CI->getArgOperand(1);
833 ConstantFP *CF0 = dyn_cast<ConstantFP>(opr0);
834 ConstantFP *CF1 = dyn_cast<ConstantFP>(opr1);
835
836 if ((CF0 && CF1) || // both are constants
837 (CF1 && (getArgType(FInfo) == AMDGPULibFunc::F32)))
838 // CF1 is constant && f32 divide
839 {
840 Value *nval1 = B.CreateFDiv(ConstantFP::get(opr1->getType(), 1.0),
841 opr1, "__div2recip");
842 Value *nval = B.CreateFMul(opr0, nval1, "__div2mul");
843 replaceCall(nval);
844 return true;
845 }
846 return false;
847}
848
849namespace llvm {
850static double log2(double V) {
851#if _XOPEN_SOURCE700 >= 600 || _ISOC99_SOURCE1 || _POSIX_C_SOURCE200809L >= 200112L
852 return ::log2(V);
853#else
854 return log(V) / 0.693147180559945309417;
855#endif
856}
857}
858
859bool AMDGPULibCalls::fold_pow(CallInst *CI, IRBuilder<> &B,
860 const FuncInfo &FInfo) {
861 assert((FInfo.getId() == AMDGPULibFunc::EI_POW ||(static_cast <bool> ((FInfo.getId() == AMDGPULibFunc::EI_POW
|| FInfo.getId() == AMDGPULibFunc::EI_POWR || FInfo.getId() ==
AMDGPULibFunc::EI_POWN) && "fold_pow: encounter a wrong function call"
) ? void (0) : __assert_fail ("(FInfo.getId() == AMDGPULibFunc::EI_POW || FInfo.getId() == AMDGPULibFunc::EI_POWR || FInfo.getId() == AMDGPULibFunc::EI_POWN) && \"fold_pow: encounter a wrong function call\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 864, __extension__ __PRETTY_FUNCTION__))
862 FInfo.getId() == AMDGPULibFunc::EI_POWR ||(static_cast <bool> ((FInfo.getId() == AMDGPULibFunc::EI_POW
|| FInfo.getId() == AMDGPULibFunc::EI_POWR || FInfo.getId() ==
AMDGPULibFunc::EI_POWN) && "fold_pow: encounter a wrong function call"
) ? void (0) : __assert_fail ("(FInfo.getId() == AMDGPULibFunc::EI_POW || FInfo.getId() == AMDGPULibFunc::EI_POWR || FInfo.getId() == AMDGPULibFunc::EI_POWN) && \"fold_pow: encounter a wrong function call\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 864, __extension__ __PRETTY_FUNCTION__))
863 FInfo.getId() == AMDGPULibFunc::EI_POWN) &&(static_cast <bool> ((FInfo.getId() == AMDGPULibFunc::EI_POW
|| FInfo.getId() == AMDGPULibFunc::EI_POWR || FInfo.getId() ==
AMDGPULibFunc::EI_POWN) && "fold_pow: encounter a wrong function call"
) ? void (0) : __assert_fail ("(FInfo.getId() == AMDGPULibFunc::EI_POW || FInfo.getId() == AMDGPULibFunc::EI_POWR || FInfo.getId() == AMDGPULibFunc::EI_POWN) && \"fold_pow: encounter a wrong function call\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 864, __extension__ __PRETTY_FUNCTION__))
864 "fold_pow: encounter a wrong function call")(static_cast <bool> ((FInfo.getId() == AMDGPULibFunc::EI_POW
|| FInfo.getId() == AMDGPULibFunc::EI_POWR || FInfo.getId() ==
AMDGPULibFunc::EI_POWN) && "fold_pow: encounter a wrong function call"
) ? void (0) : __assert_fail ("(FInfo.getId() == AMDGPULibFunc::EI_POW || FInfo.getId() == AMDGPULibFunc::EI_POWR || FInfo.getId() == AMDGPULibFunc::EI_POWN) && \"fold_pow: encounter a wrong function call\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 864, __extension__ __PRETTY_FUNCTION__))
;
865
866 Value *opr0, *opr1;
867 ConstantFP *CF;
868 ConstantInt *CINT;
869 ConstantAggregateZero *CZero;
870 Type *eltType;
871
872 opr0 = CI->getArgOperand(0);
873 opr1 = CI->getArgOperand(1);
874 CZero = dyn_cast<ConstantAggregateZero>(opr1);
875 if (getVecSize(FInfo) == 1) {
876 eltType = opr0->getType();
877 CF = dyn_cast<ConstantFP>(opr1);
878 CINT = dyn_cast<ConstantInt>(opr1);
879 } else {
880 VectorType *VTy = dyn_cast<VectorType>(opr0->getType());
881 assert(VTy && "Oprand of vector function should be of vectortype")(static_cast <bool> (VTy && "Oprand of vector function should be of vectortype"
) ? void (0) : __assert_fail ("VTy && \"Oprand of vector function should be of vectortype\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 881, __extension__ __PRETTY_FUNCTION__))
;
882 eltType = VTy->getElementType();
883 ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(opr1);
884
885 // Now, only Handle vector const whose elements have the same value.
886 CF = CDV ? dyn_cast_or_null<ConstantFP>(CDV->getSplatValue()) : nullptr;
887 CINT = CDV ? dyn_cast_or_null<ConstantInt>(CDV->getSplatValue()) : nullptr;
888 }
889
890 // No unsafe math , no constant argument, do nothing
891 if (!isUnsafeMath(CI) && !CF && !CINT && !CZero)
892 return false;
893
894 // 0x1111111 means that we don't do anything for this call.
895 int ci_opr1 = (CINT ? (int)CINT->getSExtValue() : 0x1111111);
896
897 if ((CF && CF->isZero()) || (CINT && ci_opr1 == 0) || CZero) {
898 // pow/powr/pown(x, 0) == 1
899 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> 1\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> 1\n"; } } while (false)
;
900 Constant *cnval = ConstantFP::get(eltType, 1.0);
901 if (getVecSize(FInfo) > 1) {
902 cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
903 }
904 replaceCall(cnval);
905 return true;
906 }
907 if ((CF && CF->isExactlyValue(1.0)) || (CINT && ci_opr1 == 1)) {
908 // pow/powr/pown(x, 1.0) = x
909 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << "\n"; } } while
(false)
;
910 replaceCall(opr0);
911 return true;
912 }
913 if ((CF && CF->isExactlyValue(2.0)) || (CINT && ci_opr1 == 2)) {
914 // pow/powr/pown(x, 2.0) = x*x
915 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << " * " << *opr0do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " * " <<
*opr0 << "\n"; } } while (false)
916 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " * " <<
*opr0 << "\n"; } } while (false)
;
917 Value *nval = B.CreateFMul(opr0, opr0, "__pow2");
918 replaceCall(nval);
919 return true;
920 }
921 if ((CF && CF->isExactlyValue(-1.0)) || (CINT && ci_opr1 == -1)) {
922 // pow/powr/pown(x, -1.0) = 1.0/x
923 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> 1 / " << *opr0 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> 1 / " << *opr0 << "\n"; } }
while (false)
;
924 Constant *cnval = ConstantFP::get(eltType, 1.0);
925 if (getVecSize(FInfo) > 1) {
926 cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
927 }
928 Value *nval = B.CreateFDiv(cnval, opr0, "__powrecip");
929 replaceCall(nval);
930 return true;
931 }
932
933 Module *M = CI->getModule();
934 if (CF && (CF->isExactlyValue(0.5) || CF->isExactlyValue(-0.5))) {
935 // pow[r](x, [-]0.5) = sqrt(x)
936 bool issqrt = CF->isExactlyValue(0.5);
937 if (Constant *FPExpr = getFunction(M,
938 AMDGPULibFunc(issqrt ? AMDGPULibFunc::EI_SQRT
939 : AMDGPULibFunc::EI_RSQRT, FInfo))) {
940 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << FInfo.getName().c_str() <<
"(" << *opr0 << ")\n"; } } while (false)
941 << FInfo.getName().c_str() << "(" << *opr0 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << FInfo.getName().c_str() <<
"(" << *opr0 << ")\n"; } } while (false)
;
942 Value *nval = CreateCallEx(B,FPExpr, opr0, issqrt ? "__pow2sqrt"
943 : "__pow2rsqrt");
944 replaceCall(nval);
945 return true;
946 }
947 }
948
949 if (!isUnsafeMath(CI))
950 return false;
951
952 // Unsafe Math optimization
953
954 // Remember that ci_opr1 is set if opr1 is integral
955 if (CF) {
956 double dval = (getArgType(FInfo) == AMDGPULibFunc::F32)
957 ? (double)CF->getValueAPF().convertToFloat()
958 : CF->getValueAPF().convertToDouble();
959 int ival = (int)dval;
960 if ((double)ival == dval) {
961 ci_opr1 = ival;
962 } else
963 ci_opr1 = 0x11111111;
964 }
965
966 // pow/powr/pown(x, c) = [1/](x*x*..x); where
967 // trunc(c) == c && the number of x == c && |c| <= 12
968 unsigned abs_opr1 = (ci_opr1 < 0) ? -ci_opr1 : ci_opr1;
969 if (abs_opr1 <= 12) {
970 Constant *cnval;
971 Value *nval;
972 if (abs_opr1 == 0) {
973 cnval = ConstantFP::get(eltType, 1.0);
974 if (getVecSize(FInfo) > 1) {
975 cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
976 }
977 nval = cnval;
978 } else {
979 Value *valx2 = nullptr;
980 nval = nullptr;
981 while (abs_opr1 > 0) {
982 valx2 = valx2 ? B.CreateFMul(valx2, valx2, "__powx2") : opr0;
983 if (abs_opr1 & 1) {
984 nval = nval ? B.CreateFMul(nval, valx2, "__powprod") : valx2;
985 }
986 abs_opr1 >>= 1;
987 }
988 }
989
990 if (ci_opr1 < 0) {
991 cnval = ConstantFP::get(eltType, 1.0);
992 if (getVecSize(FInfo) > 1) {
993 cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
994 }
995 nval = B.CreateFDiv(cnval, nval, "__1powprod");
996 }
997 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << ((ci_opr1 < 0) ? "1/prod("
: "prod(") << *opr0 << ")\n"; } } while (false)
998 << ((ci_opr1 < 0) ? "1/prod(" : "prod(") << *opr0do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << ((ci_opr1 < 0) ? "1/prod("
: "prod(") << *opr0 << ")\n"; } } while (false)
999 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << ((ci_opr1 < 0) ? "1/prod("
: "prod(") << *opr0 << ")\n"; } } while (false)
;
1000 replaceCall(nval);
1001 return true;
1002 }
1003
1004 // powr ---> exp2(y * log2(x))
1005 // pown/pow ---> powr(fabs(x), y) | (x & ((int)y << 31))
1006 Constant *ExpExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_EXP2,
1007 FInfo));
1008 if (!ExpExpr)
1009 return false;
1010
1011 bool needlog = false;
1012 bool needabs = false;
1013 bool needcopysign = false;
1014 Constant *cnval = nullptr;
1015 if (getVecSize(FInfo) == 1) {
1016 CF = dyn_cast<ConstantFP>(opr0);
1017
1018 if (CF) {
1019 double V = (getArgType(FInfo) == AMDGPULibFunc::F32)
1020 ? (double)CF->getValueAPF().convertToFloat()
1021 : CF->getValueAPF().convertToDouble();
1022
1023 V = log2(std::abs(V));
1024 cnval = ConstantFP::get(eltType, V);
1025 needcopysign = (FInfo.getId() != AMDGPULibFunc::EI_POWR) &&
1026 CF->isNegative();
1027 } else {
1028 needlog = true;
1029 needcopysign = needabs = FInfo.getId() != AMDGPULibFunc::EI_POWR &&
1030 (!CF || CF->isNegative());
1031 }
1032 } else {
1033 ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(opr0);
1034
1035 if (!CDV) {
1036 needlog = true;
1037 needcopysign = needabs = FInfo.getId() != AMDGPULibFunc::EI_POWR;
1038 } else {
1039 assert ((int)CDV->getNumElements() == getVecSize(FInfo) &&(static_cast <bool> ((int)CDV->getNumElements() == getVecSize
(FInfo) && "Wrong vector size detected") ? void (0) :
__assert_fail ("(int)CDV->getNumElements() == getVecSize(FInfo) && \"Wrong vector size detected\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1040, __extension__ __PRETTY_FUNCTION__))
1040 "Wrong vector size detected")(static_cast <bool> ((int)CDV->getNumElements() == getVecSize
(FInfo) && "Wrong vector size detected") ? void (0) :
__assert_fail ("(int)CDV->getNumElements() == getVecSize(FInfo) && \"Wrong vector size detected\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1040, __extension__ __PRETTY_FUNCTION__))
;
1041
1042 SmallVector<double, 0> DVal;
1043 for (int i=0; i < getVecSize(FInfo); ++i) {
1044 double V = (getArgType(FInfo) == AMDGPULibFunc::F32)
1045 ? (double)CDV->getElementAsFloat(i)
1046 : CDV->getElementAsDouble(i);
1047 if (V < 0.0) needcopysign = true;
1048 V = log2(std::abs(V));
1049 DVal.push_back(V);
1050 }
1051 if (getArgType(FInfo) == AMDGPULibFunc::F32) {
1052 SmallVector<float, 0> FVal;
1053 for (unsigned i=0; i < DVal.size(); ++i) {
1054 FVal.push_back((float)DVal[i]);
1055 }
1056 ArrayRef<float> tmp(FVal);
1057 cnval = ConstantDataVector::get(M->getContext(), tmp);
1058 } else {
1059 ArrayRef<double> tmp(DVal);
1060 cnval = ConstantDataVector::get(M->getContext(), tmp);
1061 }
1062 }
1063 }
1064
1065 if (needcopysign && (FInfo.getId() == AMDGPULibFunc::EI_POW)) {
1066 // We cannot handle corner cases for a general pow() function, give up
1067 // unless y is a constant integral value. Then proceed as if it were pown.
1068 if (getVecSize(FInfo) == 1) {
1069 if (const ConstantFP *CF = dyn_cast<ConstantFP>(opr1)) {
1070 double y = (getArgType(FInfo) == AMDGPULibFunc::F32)
1071 ? (double)CF->getValueAPF().convertToFloat()
1072 : CF->getValueAPF().convertToDouble();
1073 if (y != (double)(int64_t)y)
1074 return false;
1075 } else
1076 return false;
1077 } else {
1078 if (const ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(opr1)) {
1079 for (int i=0; i < getVecSize(FInfo); ++i) {
1080 double y = (getArgType(FInfo) == AMDGPULibFunc::F32)
1081 ? (double)CDV->getElementAsFloat(i)
1082 : CDV->getElementAsDouble(i);
1083 if (y != (double)(int64_t)y)
1084 return false;
1085 }
1086 } else
1087 return false;
1088 }
1089 }
1090
1091 Value *nval;
1092 if (needabs) {
1093 Constant *AbsExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_FABS,
1094 FInfo));
1095 if (!AbsExpr)
1096 return false;
1097 nval = CreateCallEx(B, AbsExpr, opr0, "__fabs");
1098 } else {
1099 nval = cnval ? cnval : opr0;
1100 }
1101 if (needlog) {
1102 Constant *LogExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_LOG2,
1103 FInfo));
1104 if (!LogExpr)
1105 return false;
1106 nval = CreateCallEx(B,LogExpr, nval, "__log2");
1107 }
1108
1109 if (FInfo.getId() == AMDGPULibFunc::EI_POWN) {
1110 // convert int(32) to fp(f32 or f64)
1111 opr1 = B.CreateSIToFP(opr1, nval->getType(), "pownI2F");
1112 }
1113 nval = B.CreateFMul(opr1, nval, "__ylogx");
1114 nval = CreateCallEx(B,ExpExpr, nval, "__exp2");
1115
1116 if (needcopysign) {
1117 Value *opr_n;
1118 Type* rTy = opr0->getType();
1119 Type* nTyS = eltType->isDoubleTy() ? B.getInt64Ty() : B.getInt32Ty();
1120 Type *nTy = nTyS;
1121 if (const VectorType *vTy = dyn_cast<VectorType>(rTy))
1122 nTy = VectorType::get(nTyS, vTy->getNumElements());
1123 unsigned size = nTy->getScalarSizeInBits();
1124 opr_n = CI->getArgOperand(1);
1125 if (opr_n->getType()->isIntegerTy())
1126 opr_n = B.CreateZExtOrBitCast(opr_n, nTy, "__ytou");
1127 else
1128 opr_n = B.CreateFPToSI(opr1, nTy, "__ytou");
1129
1130 Value *sign = B.CreateShl(opr_n, size-1, "__yeven");
1131 sign = B.CreateAnd(B.CreateBitCast(opr0, nTy), sign, "__pow_sign");
1132 nval = B.CreateOr(B.CreateBitCast(nval, nTy), sign);
1133 nval = B.CreateBitCast(nval, opr0->getType());
1134 }
1135
1136 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << "exp2(" << *opr1 <<
" * log2(" << *opr0 << "))\n"; } } while (false)
1137 << "exp2(" << *opr1 << " * log2(" << *opr0 << "))\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << "exp2(" << *opr1 <<
" * log2(" << *opr0 << "))\n"; } } while (false)
;
1138 replaceCall(nval);
1139
1140 return true;
1141}
1142
1143bool AMDGPULibCalls::fold_rootn(CallInst *CI, IRBuilder<> &B,
1144 const FuncInfo &FInfo) {
1145 Value *opr0 = CI->getArgOperand(0);
1146 Value *opr1 = CI->getArgOperand(1);
1147
1148 ConstantInt *CINT = dyn_cast<ConstantInt>(opr1);
1149 if (!CINT) {
1150 return false;
1151 }
1152 int ci_opr1 = (int)CINT->getSExtValue();
1153 if (ci_opr1 == 1) { // rootn(x, 1) = x
1154 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << "\n"; } } while
(false)
;
1155 replaceCall(opr0);
1156 return true;
1157 }
1158 if (ci_opr1 == 2) { // rootn(x, 2) = sqrt(x)
1159 std::vector<const Type*> ParamsTys;
1160 ParamsTys.push_back(opr0->getType());
1161 Module *M = CI->getModule();
1162 if (Constant *FPExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_SQRT,
1163 FInfo))) {
1164 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> sqrt(" << *opr0 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> sqrt(" << *opr0 << ")\n"; }
} while (false)
;
1165 Value *nval = CreateCallEx(B,FPExpr, opr0, "__rootn2sqrt");
1166 replaceCall(nval);
1167 return true;
1168 }
1169 } else if (ci_opr1 == 3) { // rootn(x, 3) = cbrt(x)
1170 Module *M = CI->getModule();
1171 if (Constant *FPExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_CBRT,
1172 FInfo))) {
1173 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> cbrt(" << *opr0 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> cbrt(" << *opr0 << ")\n"; }
} while (false)
;
1174 Value *nval = CreateCallEx(B,FPExpr, opr0, "__rootn2cbrt");
1175 replaceCall(nval);
1176 return true;
1177 }
1178 } else if (ci_opr1 == -1) { // rootn(x, -1) = 1.0/x
1179 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> 1.0 / " << *opr0 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> 1.0 / " << *opr0 << "\n"; }
} while (false)
;
1180 Value *nval = B.CreateFDiv(ConstantFP::get(opr0->getType(), 1.0),
1181 opr0,
1182 "__rootn2div");
1183 replaceCall(nval);
1184 return true;
1185 } else if (ci_opr1 == -2) { // rootn(x, -2) = rsqrt(x)
1186 std::vector<const Type*> ParamsTys;
1187 ParamsTys.push_back(opr0->getType());
1188 Module *M = CI->getModule();
1189 if (Constant *FPExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_RSQRT,
1190 FInfo))) {
1191 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> rsqrt(" << *opr0do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> rsqrt(" << *opr0 << ")\n"; }
} while (false)
1192 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> rsqrt(" << *opr0 << ")\n"; }
} while (false)
;
1193 Value *nval = CreateCallEx(B,FPExpr, opr0, "__rootn2rsqrt");
1194 replaceCall(nval);
1195 return true;
1196 }
1197 }
1198 return false;
1199}
1200
1201bool AMDGPULibCalls::fold_fma_mad(CallInst *CI, IRBuilder<> &B,
1202 const FuncInfo &FInfo) {
1203 Value *opr0 = CI->getArgOperand(0);
1204 Value *opr1 = CI->getArgOperand(1);
1205 Value *opr2 = CI->getArgOperand(2);
1206
1207 ConstantFP *CF0 = dyn_cast<ConstantFP>(opr0);
1208 ConstantFP *CF1 = dyn_cast<ConstantFP>(opr1);
1209 if ((CF0 && CF0->isZero()) || (CF1 && CF1->isZero())) {
1210 // fma/mad(a, b, c) = c if a=0 || b=0
1211 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr2 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr2 << "\n"; } } while
(false)
;
1212 replaceCall(opr2);
1213 return true;
1214 }
1215 if (CF0 && CF0->isExactlyValue(1.0f)) {
1216 // fma/mad(a, b, c) = b+c if a=1
1217 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr1 << " + " << *opr2do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr1 << " + " <<
*opr2 << "\n"; } } while (false)
1218 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr1 << " + " <<
*opr2 << "\n"; } } while (false)
;
1219 Value *nval = B.CreateFAdd(opr1, opr2, "fmaadd");
1220 replaceCall(nval);
1221 return true;
1222 }
1223 if (CF1 && CF1->isExactlyValue(1.0f)) {
1224 // fma/mad(a, b, c) = a+c if b=1
1225 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << " + " << *opr2do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " + " <<
*opr2 << "\n"; } } while (false)
1226 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " + " <<
*opr2 << "\n"; } } while (false)
;
1227 Value *nval = B.CreateFAdd(opr0, opr2, "fmaadd");
1228 replaceCall(nval);
1229 return true;
1230 }
1231 if (ConstantFP *CF = dyn_cast<ConstantFP>(opr2)) {
1232 if (CF->isZero()) {
1233 // fma/mad(a, b, c) = a*b if c=0
1234 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << " * "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " * " <<
*opr1 << "\n"; } } while (false)
1235 << *opr1 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " * " <<
*opr1 << "\n"; } } while (false)
;
1236 Value *nval = B.CreateFMul(opr0, opr1, "fmamul");
1237 replaceCall(nval);
1238 return true;
1239 }
1240 }
1241
1242 return false;
1243}
1244
1245// Get a scalar native builtin signle argument FP function
1246Constant* AMDGPULibCalls::getNativeFunction(Module* M, const FuncInfo& FInfo) {
1247 if (getArgType(FInfo) == AMDGPULibFunc::F64 || !HasNative(FInfo.getId()))
1248 return nullptr;
1249 FuncInfo nf = FInfo;
1250 nf.setPrefix(AMDGPULibFunc::NATIVE);
1251 return getFunction(M, nf);
1252}
1253
1254// fold sqrt -> native_sqrt (x)
1255bool AMDGPULibCalls::fold_sqrt(CallInst *CI, IRBuilder<> &B,
1256 const FuncInfo &FInfo) {
1257 if (getArgType(FInfo) == AMDGPULibFunc::F32 && (getVecSize(FInfo) == 1) &&
1258 (FInfo.getPrefix() != AMDGPULibFunc::NATIVE)) {
1259 if (Constant *FPExpr = getNativeFunction(
1260 CI->getModule(), AMDGPULibFunc(AMDGPULibFunc::EI_SQRT, FInfo))) {
1261 Value *opr0 = CI->getArgOperand(0);
1262 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << "sqrt(" << *opr0 <<
")\n"; } } while (false)
1263 << "sqrt(" << *opr0 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << "sqrt(" << *opr0 <<
")\n"; } } while (false)
;
1264 Value *nval = CreateCallEx(B,FPExpr, opr0, "__sqrt");
1265 replaceCall(nval);
1266 return true;
1267 }
1268 }
1269 return false;
1270}
1271
1272// fold sin, cos -> sincos.
1273bool AMDGPULibCalls::fold_sincos(CallInst *CI, IRBuilder<> &B,
1274 AliasAnalysis *AA) {
1275 AMDGPULibFunc fInfo;
1276 if (!AMDGPULibFunc::parse(CI->getCalledFunction()->getName(), fInfo))
1277 return false;
1278
1279 assert(fInfo.getId() == AMDGPULibFunc::EI_SIN ||(static_cast <bool> (fInfo.getId() == AMDGPULibFunc::EI_SIN
|| fInfo.getId() == AMDGPULibFunc::EI_COS) ? void (0) : __assert_fail
("fInfo.getId() == AMDGPULibFunc::EI_SIN || fInfo.getId() == AMDGPULibFunc::EI_COS"
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1280, __extension__ __PRETTY_FUNCTION__))
1280 fInfo.getId() == AMDGPULibFunc::EI_COS)(static_cast <bool> (fInfo.getId() == AMDGPULibFunc::EI_SIN
|| fInfo.getId() == AMDGPULibFunc::EI_COS) ? void (0) : __assert_fail
("fInfo.getId() == AMDGPULibFunc::EI_SIN || fInfo.getId() == AMDGPULibFunc::EI_COS"
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1280, __extension__ __PRETTY_FUNCTION__))
;
1281 bool const isSin = fInfo.getId() == AMDGPULibFunc::EI_SIN;
1282
1283 Value *CArgVal = CI->getArgOperand(0);
1284 BasicBlock * const CBB = CI->getParent();
1285
1286 int const MaxScan = 30;
1287
1288 { // fold in load value.
1289 LoadInst *LI = dyn_cast<LoadInst>(CArgVal);
1290 if (LI && LI->getParent() == CBB) {
1291 BasicBlock::iterator BBI = LI->getIterator();
1292 Value *AvailableVal = FindAvailableLoadedValue(LI, CBB, BBI, MaxScan, AA);
1293 if (AvailableVal) {
1294 CArgVal->replaceAllUsesWith(AvailableVal);
1295 if (CArgVal->getNumUses() == 0)
1296 LI->eraseFromParent();
1297 CArgVal = CI->getArgOperand(0);
1298 }
1299 }
1300 }
1301
1302 Module *M = CI->getModule();
1303 fInfo.setId(isSin ? AMDGPULibFunc::EI_COS : AMDGPULibFunc::EI_SIN);
1304 std::string const PairName = fInfo.mangle();
1305
1306 CallInst *UI = nullptr;
1307 for (User* U : CArgVal->users()) {
1308 CallInst *XI = dyn_cast_or_null<CallInst>(U);
1309 if (!XI || XI == CI || XI->getParent() != CBB)
1310 continue;
1311
1312 Function *UCallee = XI->getCalledFunction();
1313 if (!UCallee || !UCallee->getName().equals(PairName))
1314 continue;
1315
1316 BasicBlock::iterator BBI = CI->getIterator();
1317 if (BBI == CI->getParent()->begin())
1318 break;
1319 --BBI;
1320 for (int I = MaxScan; I > 0 && BBI != CBB->begin(); --BBI, --I) {
1321 if (cast<Instruction>(BBI) == XI) {
1322 UI = XI;
1323 break;
1324 }
1325 }
1326 if (UI) break;
1327 }
1328
1329 if (!UI) return false;
1330
1331 // Merge the sin and cos.
1332
1333 // for OpenCL 2.0 we have only generic implementation of sincos
1334 // function.
1335 AMDGPULibFunc nf(AMDGPULibFunc::EI_SINCOS, fInfo);
1336 const AMDGPUAS AS = AMDGPU::getAMDGPUAS(*M);
1337 nf.getLeads()[0].PtrKind = AMDGPULibFunc::getEPtrKindFromAddrSpace(AS.FLAT_ADDRESS);
1338 Function *Fsincos = dyn_cast_or_null<Function>(getFunction(M, nf));
1339 if (!Fsincos) return false;
1340
1341 BasicBlock::iterator ItOld = B.GetInsertPoint();
1342 AllocaInst *Alloc = insertAlloca(UI, B, "__sincos_");
1343 B.SetInsertPoint(UI);
1344
1345 Value *P = Alloc;
1346 Type *PTy = Fsincos->getFunctionType()->getParamType(1);
1347 // The allocaInst allocates the memory in private address space. This need
1348 // to be bitcasted to point to the address space of cos pointer type.
1349 // In OpenCL 2.0 this is generic, while in 1.2 that is private.
1350 if (PTy->getPointerAddressSpace() != AS.PRIVATE_ADDRESS)
1351 P = B.CreateAddrSpaceCast(Alloc, PTy);
1352 CallInst *Call = CreateCallEx2(B, Fsincos, UI->getArgOperand(0), P);
1353
1354 LLVM_DEBUG(errs() << "AMDIC: fold_sincos (" << *CI << ", " << *UI << ") with "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: fold_sincos ("
<< *CI << ", " << *UI << ") with " <<
*Call << "\n"; } } while (false)
1355 << *Call << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: fold_sincos ("
<< *CI << ", " << *UI << ") with " <<
*Call << "\n"; } } while (false)
;
1356
1357 if (!isSin) { // CI->cos, UI->sin
1358 B.SetInsertPoint(&*ItOld);
1359 UI->replaceAllUsesWith(&*Call);
1360 Instruction *Reload = B.CreateLoad(Alloc);
1361 CI->replaceAllUsesWith(Reload);
1362 UI->eraseFromParent();
1363 CI->eraseFromParent();
1364 } else { // CI->sin, UI->cos
1365 Instruction *Reload = B.CreateLoad(Alloc);
1366 UI->replaceAllUsesWith(Reload);
1367 CI->replaceAllUsesWith(Call);
1368 UI->eraseFromParent();
1369 CI->eraseFromParent();
1370 }
1371 return true;
1372}
1373
1374// Get insertion point at entry.
1375BasicBlock::iterator AMDGPULibCalls::getEntryIns(CallInst * UI) {
1376 Function * Func = UI->getParent()->getParent();
1377 BasicBlock * BB = &Func->getEntryBlock();
1378 assert(BB && "Entry block not found!")(static_cast <bool> (BB && "Entry block not found!"
) ? void (0) : __assert_fail ("BB && \"Entry block not found!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1378, __extension__ __PRETTY_FUNCTION__))
;
1379 BasicBlock::iterator ItNew = BB->begin();
1380 return ItNew;
1381}
1382
1383// Insert a AllocsInst at the beginning of function entry block.
1384AllocaInst* AMDGPULibCalls::insertAlloca(CallInst *UI, IRBuilder<> &B,
1385 const char *prefix) {
1386 BasicBlock::iterator ItNew = getEntryIns(UI);
1387 Function *UCallee = UI->getCalledFunction();
1388 Type *RetType = UCallee->getReturnType();
1389 B.SetInsertPoint(&*ItNew);
1390 AllocaInst *Alloc = B.CreateAlloca(RetType, 0,
1391 std::string(prefix) + UI->getName());
1392 Alloc->setAlignment(UCallee->getParent()->getDataLayout()
1393 .getTypeAllocSize(RetType));
1394 return Alloc;
1395}
1396
1397bool AMDGPULibCalls::evaluateScalarMathFunc(FuncInfo &FInfo,
1398 double& Res0, double& Res1,
1399 Constant *copr0, Constant *copr1,
1400 Constant *copr2) {
1401 // By default, opr0/opr1/opr3 holds values of float/double type.
1402 // If they are not float/double, each function has to its
1403 // operand separately.
1404 double opr0=0.0, opr1=0.0, opr2=0.0;
1405 ConstantFP *fpopr0 = dyn_cast_or_null<ConstantFP>(copr0);
1406 ConstantFP *fpopr1 = dyn_cast_or_null<ConstantFP>(copr1);
1407 ConstantFP *fpopr2 = dyn_cast_or_null<ConstantFP>(copr2);
1408 if (fpopr0) {
1409 opr0 = (getArgType(FInfo) == AMDGPULibFunc::F64)
1410 ? fpopr0->getValueAPF().convertToDouble()
1411 : (double)fpopr0->getValueAPF().convertToFloat();
1412 }
1413
1414 if (fpopr1) {
1415 opr1 = (getArgType(FInfo) == AMDGPULibFunc::F64)
1416 ? fpopr1->getValueAPF().convertToDouble()
1417 : (double)fpopr1->getValueAPF().convertToFloat();
1418 }
1419
1420 if (fpopr2) {
1421 opr2 = (getArgType(FInfo) == AMDGPULibFunc::F64)
1422 ? fpopr2->getValueAPF().convertToDouble()
1423 : (double)fpopr2->getValueAPF().convertToFloat();
1424 }
1425
1426 switch (FInfo.getId()) {
1427 default : return false;
1428
1429 case AMDGPULibFunc::EI_ACOS:
1430 Res0 = acos(opr0);
1431 return true;
1432
1433 case AMDGPULibFunc::EI_ACOSH:
1434 // acosh(x) == log(x + sqrt(x*x - 1))
1435 Res0 = log(opr0 + sqrt(opr0*opr0 - 1.0));
1436 return true;
1437
1438 case AMDGPULibFunc::EI_ACOSPI:
1439 Res0 = acos(opr0) / MATH_PI3.14159265358979323846264338327950288419716939937511;
1440 return true;
1441
1442 case AMDGPULibFunc::EI_ASIN:
1443 Res0 = asin(opr0);
1444 return true;
1445
1446 case AMDGPULibFunc::EI_ASINH:
1447 // asinh(x) == log(x + sqrt(x*x + 1))
1448 Res0 = log(opr0 + sqrt(opr0*opr0 + 1.0));
1449 return true;
1450
1451 case AMDGPULibFunc::EI_ASINPI:
1452 Res0 = asin(opr0) / MATH_PI3.14159265358979323846264338327950288419716939937511;
1453 return true;
1454
1455 case AMDGPULibFunc::EI_ATAN:
1456 Res0 = atan(opr0);
1457 return true;
1458
1459 case AMDGPULibFunc::EI_ATANH:
1460 // atanh(x) == (log(x+1) - log(x-1))/2;
1461 Res0 = (log(opr0 + 1.0) - log(opr0 - 1.0))/2.0;
1462 return true;
1463
1464 case AMDGPULibFunc::EI_ATANPI:
1465 Res0 = atan(opr0) / MATH_PI3.14159265358979323846264338327950288419716939937511;
1466 return true;
1467
1468 case AMDGPULibFunc::EI_CBRT:
1469 Res0 = (opr0 < 0.0) ? -pow(-opr0, 1.0/3.0) : pow(opr0, 1.0/3.0);
1470 return true;
1471
1472 case AMDGPULibFunc::EI_COS:
1473 Res0 = cos(opr0);
1474 return true;
1475
1476 case AMDGPULibFunc::EI_COSH:
1477 Res0 = cosh(opr0);
1478 return true;
1479
1480 case AMDGPULibFunc::EI_COSPI:
1481 Res0 = cos(MATH_PI3.14159265358979323846264338327950288419716939937511 * opr0);
1482 return true;
1483
1484 case AMDGPULibFunc::EI_EXP:
1485 Res0 = exp(opr0);
1486 return true;
1487
1488 case AMDGPULibFunc::EI_EXP2:
1489 Res0 = pow(2.0, opr0);
1490 return true;
1491
1492 case AMDGPULibFunc::EI_EXP10:
1493 Res0 = pow(10.0, opr0);
1494 return true;
1495
1496 case AMDGPULibFunc::EI_EXPM1:
1497 Res0 = exp(opr0) - 1.0;
1498 return true;
1499
1500 case AMDGPULibFunc::EI_LOG:
1501 Res0 = log(opr0);
1502 return true;
1503
1504 case AMDGPULibFunc::EI_LOG2:
1505 Res0 = log(opr0) / log(2.0);
1506 return true;
1507
1508 case AMDGPULibFunc::EI_LOG10:
1509 Res0 = log(opr0) / log(10.0);
1510 return true;
1511
1512 case AMDGPULibFunc::EI_RSQRT:
1513 Res0 = 1.0 / sqrt(opr0);
1514 return true;
1515
1516 case AMDGPULibFunc::EI_SIN:
1517 Res0 = sin(opr0);
1518 return true;
1519
1520 case AMDGPULibFunc::EI_SINH:
1521 Res0 = sinh(opr0);
1522 return true;
1523
1524 case AMDGPULibFunc::EI_SINPI:
1525 Res0 = sin(MATH_PI3.14159265358979323846264338327950288419716939937511 * opr0);
1526 return true;
1527
1528 case AMDGPULibFunc::EI_SQRT:
1529 Res0 = sqrt(opr0);
1530 return true;
1531
1532 case AMDGPULibFunc::EI_TAN:
1533 Res0 = tan(opr0);
1534 return true;
1535
1536 case AMDGPULibFunc::EI_TANH:
1537 Res0 = tanh(opr0);
1538 return true;
1539
1540 case AMDGPULibFunc::EI_TANPI:
1541 Res0 = tan(MATH_PI3.14159265358979323846264338327950288419716939937511 * opr0);
1542 return true;
1543
1544 case AMDGPULibFunc::EI_RECIP:
1545 Res0 = 1.0 / opr0;
1546 return true;
1547
1548 // two-arg functions
1549 case AMDGPULibFunc::EI_DIVIDE:
1550 Res0 = opr0 / opr1;
1551 return true;
1552
1553 case AMDGPULibFunc::EI_POW:
1554 case AMDGPULibFunc::EI_POWR:
1555 Res0 = pow(opr0, opr1);
1556 return true;
1557
1558 case AMDGPULibFunc::EI_POWN: {
1559 if (ConstantInt *iopr1 = dyn_cast_or_null<ConstantInt>(copr1)) {
1560 double val = (double)iopr1->getSExtValue();
1561 Res0 = pow(opr0, val);
1562 return true;
1563 }
1564 return false;
1565 }
1566
1567 case AMDGPULibFunc::EI_ROOTN: {
1568 if (ConstantInt *iopr1 = dyn_cast_or_null<ConstantInt>(copr1)) {
1569 double val = (double)iopr1->getSExtValue();
1570 Res0 = pow(opr0, 1.0 / val);
1571 return true;
1572 }
1573 return false;
1574 }
1575
1576 // with ptr arg
1577 case AMDGPULibFunc::EI_SINCOS:
1578 Res0 = sin(opr0);
1579 Res1 = cos(opr0);
1580 return true;
1581
1582 // three-arg functions
1583 case AMDGPULibFunc::EI_FMA:
1584 case AMDGPULibFunc::EI_MAD:
1585 Res0 = opr0 * opr1 + opr2;
1586 return true;
1587 }
1588
1589 return false;
1590}
1591
1592bool AMDGPULibCalls::evaluateCall(CallInst *aCI, FuncInfo &FInfo) {
1593 int numArgs = (int)aCI->getNumArgOperands();
1594 if (numArgs > 3)
21
Assuming 'numArgs' is <= 3
22
Taking false branch
1595 return false;
1596
1597 Constant *copr0 = nullptr;
1598 Constant *copr1 = nullptr;
1599 Constant *copr2 = nullptr;
1600 if (numArgs > 0) {
23
Assuming 'numArgs' is <= 0
24
Taking false branch
1601 if ((copr0 = dyn_cast<Constant>(aCI->getArgOperand(0))) == nullptr)
1602 return false;
1603 }
1604
1605 if (numArgs > 1) {
25
Taking false branch
1606 if ((copr1 = dyn_cast<Constant>(aCI->getArgOperand(1))) == nullptr) {
1607 if (FInfo.getId() != AMDGPULibFunc::EI_SINCOS)
1608 return false;
1609 }
1610 }
1611
1612 if (numArgs > 2) {
26
Taking false branch
1613 if ((copr2 = dyn_cast<Constant>(aCI->getArgOperand(2))) == nullptr)
1614 return false;
1615 }
1616
1617 // At this point, all arguments to aCI are constants.
1618
1619 // max vector size is 16, and sincos will generate two results.
1620 double DVal0[16], DVal1[16];
1621 bool hasTwoResults = (FInfo.getId() == AMDGPULibFunc::EI_SINCOS);
27
Assuming the condition is false
1622 if (getVecSize(FInfo) == 1) {
28
Assuming the condition is false
29
Taking false branch
1623 if (!evaluateScalarMathFunc(FInfo, DVal0[0],
1624 DVal1[0], copr0, copr1, copr2)) {
1625 return false;
1626 }
1627 } else {
1628 ConstantDataVector *CDV0 = dyn_cast_or_null<ConstantDataVector>(copr0);
1629 ConstantDataVector *CDV1 = dyn_cast_or_null<ConstantDataVector>(copr1);
1630 ConstantDataVector *CDV2 = dyn_cast_or_null<ConstantDataVector>(copr2);
1631 for (int i=0; i < getVecSize(FInfo); ++i) {
30
Assuming the condition is false
31
Loop condition is false. Execution continues on line 1642
1632 Constant *celt0 = CDV0 ? CDV0->getElementAsConstant(i) : nullptr;
1633 Constant *celt1 = CDV1 ? CDV1->getElementAsConstant(i) : nullptr;
1634 Constant *celt2 = CDV2 ? CDV2->getElementAsConstant(i) : nullptr;
1635 if (!evaluateScalarMathFunc(FInfo, DVal0[i],
1636 DVal1[i], celt0, celt1, celt2)) {
1637 return false;
1638 }
1639 }
1640 }
1641
1642 LLVMContext &context = CI->getParent()->getParent()->getContext();
1643 Constant *nval0, *nval1;
1644 if (getVecSize(FInfo) == 1) {
32
Assuming the condition is true
33
Taking true branch
1645 nval0 = ConstantFP::get(CI->getType(), DVal0[0]);
34
2nd function call argument is an uninitialized value
1646 if (hasTwoResults)
1647 nval1 = ConstantFP::get(CI->getType(), DVal1[0]);
1648 } else {
1649 if (getArgType(FInfo) == AMDGPULibFunc::F32) {
1650 SmallVector <float, 0> FVal0, FVal1;
1651 for (int i=0; i < getVecSize(FInfo); ++i)
1652 FVal0.push_back((float)DVal0[i]);
1653 ArrayRef<float> tmp0(FVal0);
1654 nval0 = ConstantDataVector::get(context, tmp0);
1655 if (hasTwoResults) {
1656 for (int i=0; i < getVecSize(FInfo); ++i)
1657 FVal1.push_back((float)DVal1[i]);
1658 ArrayRef<float> tmp1(FVal1);
1659 nval1 = ConstantDataVector::get(context, tmp1);
1660 }
1661 } else {
1662 ArrayRef<double> tmp0(DVal0);
1663 nval0 = ConstantDataVector::get(context, tmp0);
1664 if (hasTwoResults) {
1665 ArrayRef<double> tmp1(DVal1);
1666 nval1 = ConstantDataVector::get(context, tmp1);
1667 }
1668 }
1669 }
1670
1671 if (hasTwoResults) {
1672 // sincos
1673 assert(FInfo.getId() == AMDGPULibFunc::EI_SINCOS &&(static_cast <bool> (FInfo.getId() == AMDGPULibFunc::EI_SINCOS
&& "math function with ptr arg not supported yet") ?
void (0) : __assert_fail ("FInfo.getId() == AMDGPULibFunc::EI_SINCOS && \"math function with ptr arg not supported yet\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1674, __extension__ __PRETTY_FUNCTION__))
1674 "math function with ptr arg not supported yet")(static_cast <bool> (FInfo.getId() == AMDGPULibFunc::EI_SINCOS
&& "math function with ptr arg not supported yet") ?
void (0) : __assert_fail ("FInfo.getId() == AMDGPULibFunc::EI_SINCOS && \"math function with ptr arg not supported yet\""
, "/build/llvm-toolchain-snapshot-7~svn338205/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1674, __extension__ __PRETTY_FUNCTION__))
;
1675 new StoreInst(nval1, aCI->getArgOperand(1), aCI);
1676 }
1677
1678 replaceCall(nval0);
1679 return true;
1680}
1681
1682// Public interface to the Simplify LibCalls pass.
1683FunctionPass *llvm::createAMDGPUSimplifyLibCallsPass(const TargetOptions &Opt) {
1684 return new AMDGPUSimplifyLibCalls(Opt);
1685}
1686
1687FunctionPass *llvm::createAMDGPUUseNativeCallsPass() {
1688 return new AMDGPUUseNativeCalls();
1689}
1690
1691static bool setFastFlags(Function &F, const TargetOptions &Options) {
1692 AttrBuilder B;
1693
1694 if (Options.UnsafeFPMath || Options.NoInfsFPMath)
1695 B.addAttribute("no-infs-fp-math", "true");
1696 if (Options.UnsafeFPMath || Options.NoNaNsFPMath)
1697 B.addAttribute("no-nans-fp-math", "true");
1698 if (Options.UnsafeFPMath) {
1699 B.addAttribute("less-precise-fpmad", "true");
1700 B.addAttribute("unsafe-fp-math", "true");
1701 }
1702
1703 if (!B.hasAttributes())
1704 return false;
1705
1706 F.addAttributes(AttributeList::FunctionIndex, B);
1707
1708 return true;
1709}
1710
1711bool AMDGPUSimplifyLibCalls::runOnFunction(Function &F) {
1712 if (skipFunction(F))
1
Assuming the condition is false
2
Taking false branch
1713 return false;
1714
1715 bool Changed = false;
1716 auto AA = &getAnalysis<AAResultsWrapperPass>().getAAResults();
1717
1718 LLVM_DEBUG(dbgs() << "AMDIC: process function ";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { dbgs() << "AMDIC: process function "
; F.printAsOperand(dbgs(), false, F.getParent()); dbgs() <<
'\n';; } } while (false)
1719 F.printAsOperand(dbgs(), false, F.getParent()); dbgs() << '\n';)do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { dbgs() << "AMDIC: process function "
; F.printAsOperand(dbgs(), false, F.getParent()); dbgs() <<
'\n';; } } while (false)
;
1720
1721 if (!EnablePreLink)
3
Assuming the condition is false
4
Taking false branch
1722 Changed |= setFastFlags(F, Options);
1723
1724 for (auto &BB : F) {
1725 for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ) {
5
Loop condition is true. Entering loop body
1726 // Ignore non-calls.
1727 CallInst *CI = dyn_cast<CallInst>(I);
1728 ++I;
1729 if (!CI) continue;
6
Assuming 'CI' is non-null
7
Taking false branch
1730
1731 // Ignore indirect calls.
1732 Function *Callee = CI->getCalledFunction();
1733 if (Callee == 0) continue;
8
Assuming 'Callee' is not equal to null
9
Taking false branch
1734
1735 LLVM_DEBUG(dbgs() << "AMDIC: try folding " << *CI << "\n";do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { dbgs() << "AMDIC: try folding "
<< *CI << "\n"; dbgs().flush(); } } while (false
)
1736 dbgs().flush())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { dbgs() << "AMDIC: try folding "
<< *CI << "\n"; dbgs().flush(); } } while (false
)
;
1737 if(Simplifier.fold(CI, AA))
10
Calling 'AMDGPULibCalls::fold'
1738 Changed = true;
1739 }
1740 }
1741 return Changed;
1742}
1743
1744bool AMDGPUUseNativeCalls::runOnFunction(Function &F) {
1745 if (skipFunction(F) || UseNative.empty())
1746 return false;
1747
1748 bool Changed = false;
1749 for (auto &BB : F) {
1750 for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ) {
1751 // Ignore non-calls.
1752 CallInst *CI = dyn_cast<CallInst>(I);
1753 ++I;
1754 if (!CI) continue;
1755
1756 // Ignore indirect calls.
1757 Function *Callee = CI->getCalledFunction();
1758 if (Callee == 0) continue;
1759
1760 if(Simplifier.useNative(CI))
1761 Changed = true;
1762 }
1763 }
1764 return Changed;
1765}