Bug Summary

File:lib/Target/AMDGPU/AMDGPULibCalls.cpp
Warning:line 1686, column 13
2nd function call argument is an uninitialized value

Annotated Source Code

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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-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 -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -mframe-pointer=none -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-10/lib/clang/10.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-10~svn372204/build-llvm/lib/Target/AMDGPU -I /build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU -I /build/llvm-toolchain-snapshot-10~svn372204/build-llvm/include -I /build/llvm-toolchain-snapshot-10~svn372204/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-10/lib/clang/10.0.0/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-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-10~svn372204/build-llvm/lib/Target/AMDGPU -fdebug-prefix-map=/build/llvm-toolchain-snapshot-10~svn372204=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -o /tmp/scan-build-2019-09-18-161323-42855-1 -x c++ /build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp
1//===- AMDGPULibCalls.cpp -------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9/// \file
10/// This file does AMD library function optimizations.
11//
12//===----------------------------------------------------------------------===//
13
14#define DEBUG_TYPE"amdgpu-simplifylib" "amdgpu-simplifylib"
15
16#include "AMDGPU.h"
17#include "AMDGPULibFunc.h"
18#include "AMDGPUSubtarget.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/Intrinsics.h"
27#include "llvm/IR/IRBuilder.h"
28#include "llvm/IR/Function.h"
29#include "llvm/IR/LLVMContext.h"
30#include "llvm/IR/Module.h"
31#include "llvm/IR/ValueSymbolTable.h"
32#include "llvm/Support/Debug.h"
33#include "llvm/Support/raw_ostream.h"
34#include "llvm/Target/TargetMachine.h"
35#include "llvm/Target/TargetOptions.h"
36#include <vector>
37#include <cmath>
38
39using namespace llvm;
40
41static cl::opt<bool> EnablePreLink("amdgpu-prelink",
42 cl::desc("Enable pre-link mode optimizations"),
43 cl::init(false),
44 cl::Hidden);
45
46static cl::list<std::string> UseNative("amdgpu-use-native",
47 cl::desc("Comma separated list of functions to replace with native, or all"),
48 cl::CommaSeparated, cl::ValueOptional,
49 cl::Hidden);
50
51#define MATH_PI3.14159265358979323846264338327950288419716939937511 3.14159265358979323846264338327950288419716939937511
52#define MATH_E2.71828182845904523536028747135266249775724709369996 2.71828182845904523536028747135266249775724709369996
53#define MATH_SQRT21.41421356237309504880168872420969807856967187537695 1.41421356237309504880168872420969807856967187537695
54
55#define MATH_LOG2E1.4426950408889634073599246810018921374266459541529859 1.4426950408889634073599246810018921374266459541529859
56#define MATH_LOG10E0.4342944819032518276511289189166050822943970058036665 0.4342944819032518276511289189166050822943970058036665
57// Value of log2(10)
58#define MATH_LOG2_103.3219280948873623478703194294893901758648313930245806 3.3219280948873623478703194294893901758648313930245806
59// Value of 1 / log2(10)
60#define MATH_RLOG2_100.3010299956639811952137388947244930267681898814621085 0.3010299956639811952137388947244930267681898814621085
61// Value of 1 / M_LOG2E_F = 1 / log2(e)
62#define MATH_RLOG2_E0.6931471805599453094172321214581765680755001343602552 0.6931471805599453094172321214581765680755001343602552
63
64namespace llvm {
65
66class AMDGPULibCalls {
67private:
68
69 typedef llvm::AMDGPULibFunc FuncInfo;
70
71 const TargetMachine *TM;
72
73 // -fuse-native.
74 bool AllNative = false;
75
76 bool useNativeFunc(const StringRef F) const;
77
78 // Return a pointer (pointer expr) to the function if function defintion with
79 // "FuncName" exists. It may create a new function prototype in pre-link mode.
80 FunctionCallee getFunction(Module *M, const FuncInfo &fInfo);
81
82 // Replace a normal function with its native version.
83 bool replaceWithNative(CallInst *CI, const FuncInfo &FInfo);
84
85 bool parseFunctionName(const StringRef& FMangledName,
86 FuncInfo *FInfo=nullptr /*out*/);
87
88 bool TDOFold(CallInst *CI, const FuncInfo &FInfo);
89
90 /* Specialized optimizations */
91
92 // recip (half or native)
93 bool fold_recip(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
94
95 // divide (half or native)
96 bool fold_divide(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
97
98 // pow/powr/pown
99 bool fold_pow(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
100
101 // rootn
102 bool fold_rootn(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
103
104 // fma/mad
105 bool fold_fma_mad(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
106
107 // -fuse-native for sincos
108 bool sincosUseNative(CallInst *aCI, const FuncInfo &FInfo);
109
110 // evaluate calls if calls' arguments are constants.
111 bool evaluateScalarMathFunc(FuncInfo &FInfo, double& Res0,
112 double& Res1, Constant *copr0, Constant *copr1, Constant *copr2);
113 bool evaluateCall(CallInst *aCI, FuncInfo &FInfo);
114
115 // exp
116 bool fold_exp(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
117
118 // exp2
119 bool fold_exp2(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
120
121 // exp10
122 bool fold_exp10(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
123
124 // log
125 bool fold_log(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
126
127 // log2
128 bool fold_log2(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
129
130 // log10
131 bool fold_log10(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
132
133 // sqrt
134 bool fold_sqrt(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
135
136 // sin/cos
137 bool fold_sincos(CallInst * CI, IRBuilder<> &B, AliasAnalysis * AA);
138
139 // __read_pipe/__write_pipe
140 bool fold_read_write_pipe(CallInst *CI, IRBuilder<> &B, FuncInfo &FInfo);
141
142 // llvm.amdgcn.wavefrontsize
143 bool fold_wavefrontsize(CallInst *CI, IRBuilder<> &B);
144
145 // Get insertion point at entry.
146 BasicBlock::iterator getEntryIns(CallInst * UI);
147 // Insert an Alloc instruction.
148 AllocaInst* insertAlloca(CallInst * UI, IRBuilder<> &B, const char *prefix);
149 // Get a scalar native builtin signle argument FP function
150 FunctionCallee getNativeFunction(Module *M, const FuncInfo &FInfo);
151
152protected:
153 CallInst *CI;
154
155 bool isUnsafeMath(const CallInst *CI) const;
156
157 void replaceCall(Value *With) {
158 CI->replaceAllUsesWith(With);
159 CI->eraseFromParent();
160 }
161
162public:
163 AMDGPULibCalls(const TargetMachine *TM_ = nullptr) : TM(TM_) {}
164
165 bool fold(CallInst *CI, AliasAnalysis *AA = nullptr);
166
167 void initNativeFuncs();
168
169 // Replace a normal math function call with that native version
170 bool useNative(CallInst *CI);
171};
172
173} // end llvm namespace
174
175namespace {
176
177 class AMDGPUSimplifyLibCalls : public FunctionPass {
178
179 const TargetOptions Options;
180
181 AMDGPULibCalls Simplifier;
182
183 public:
184 static char ID; // Pass identification
185
186 AMDGPUSimplifyLibCalls(const TargetOptions &Opt = TargetOptions(),
187 const TargetMachine *TM = nullptr)
188 : FunctionPass(ID), Options(Opt), Simplifier(TM) {
189 initializeAMDGPUSimplifyLibCallsPass(*PassRegistry::getPassRegistry());
190 }
191
192 void getAnalysisUsage(AnalysisUsage &AU) const override {
193 AU.addRequired<AAResultsWrapperPass>();
194 }
195
196 bool runOnFunction(Function &M) override;
197 };
198
199 class AMDGPUUseNativeCalls : public FunctionPass {
200
201 AMDGPULibCalls Simplifier;
202
203 public:
204 static char ID; // Pass identification
205
206 AMDGPUUseNativeCalls() : FunctionPass(ID) {
207 initializeAMDGPUUseNativeCallsPass(*PassRegistry::getPassRegistry());
208 Simplifier.initNativeFuncs();
209 }
210
211 bool runOnFunction(Function &F) override;
212 };
213
214} // end anonymous namespace.
215
216char AMDGPUSimplifyLibCalls::ID = 0;
217char AMDGPUUseNativeCalls::ID = 0;
218
219INITIALIZE_PASS_BEGIN(AMDGPUSimplifyLibCalls, "amdgpu-simplifylib",static void *initializeAMDGPUSimplifyLibCallsPassOnce(PassRegistry
&Registry) {
220 "Simplify well-known AMD library calls", false, false)static void *initializeAMDGPUSimplifyLibCallsPassOnce(PassRegistry
&Registry) {
221INITIALIZE_PASS_DEPENDENCY(AAResultsWrapperPass)initializeAAResultsWrapperPassPass(Registry);
222INITIALIZE_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
)); }
223 "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
)); }
224
225INITIALIZE_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)); }
226 "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)); }
227 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)); }
228
229template <typename IRB>
230static CallInst *CreateCallEx(IRB &B, FunctionCallee Callee, Value *Arg,
231 const Twine &Name = "") {
232 CallInst *R = B.CreateCall(Callee, Arg, Name);
233 if (Function *F = dyn_cast<Function>(Callee.getCallee()))
234 R->setCallingConv(F->getCallingConv());
235 return R;
236}
237
238template <typename IRB>
239static CallInst *CreateCallEx2(IRB &B, FunctionCallee Callee, Value *Arg1,
240 Value *Arg2, const Twine &Name = "") {
241 CallInst *R = B.CreateCall(Callee, {Arg1, Arg2}, Name);
242 if (Function *F = dyn_cast<Function>(Callee.getCallee()))
243 R->setCallingConv(F->getCallingConv());
244 return R;
245}
246
247// Data structures for table-driven optimizations.
248// FuncTbl works for both f32 and f64 functions with 1 input argument
249
250struct TableEntry {
251 double result;
252 double input;
253};
254
255/* a list of {result, input} */
256static const TableEntry tbl_acos[] = {
257 {MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, 0.0},
258 {MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, -0.0},
259 {0.0, 1.0},
260 {MATH_PI3.14159265358979323846264338327950288419716939937511, -1.0}
261};
262static const TableEntry tbl_acosh[] = {
263 {0.0, 1.0}
264};
265static const TableEntry tbl_acospi[] = {
266 {0.5, 0.0},
267 {0.5, -0.0},
268 {0.0, 1.0},
269 {1.0, -1.0}
270};
271static const TableEntry tbl_asin[] = {
272 {0.0, 0.0},
273 {-0.0, -0.0},
274 {MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, 1.0},
275 {-MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, -1.0}
276};
277static const TableEntry tbl_asinh[] = {
278 {0.0, 0.0},
279 {-0.0, -0.0}
280};
281static const TableEntry tbl_asinpi[] = {
282 {0.0, 0.0},
283 {-0.0, -0.0},
284 {0.5, 1.0},
285 {-0.5, -1.0}
286};
287static const TableEntry tbl_atan[] = {
288 {0.0, 0.0},
289 {-0.0, -0.0},
290 {MATH_PI3.14159265358979323846264338327950288419716939937511/4.0, 1.0},
291 {-MATH_PI3.14159265358979323846264338327950288419716939937511/4.0, -1.0}
292};
293static const TableEntry tbl_atanh[] = {
294 {0.0, 0.0},
295 {-0.0, -0.0}
296};
297static const TableEntry tbl_atanpi[] = {
298 {0.0, 0.0},
299 {-0.0, -0.0},
300 {0.25, 1.0},
301 {-0.25, -1.0}
302};
303static const TableEntry tbl_cbrt[] = {
304 {0.0, 0.0},
305 {-0.0, -0.0},
306 {1.0, 1.0},
307 {-1.0, -1.0},
308};
309static const TableEntry tbl_cos[] = {
310 {1.0, 0.0},
311 {1.0, -0.0}
312};
313static const TableEntry tbl_cosh[] = {
314 {1.0, 0.0},
315 {1.0, -0.0}
316};
317static const TableEntry tbl_cospi[] = {
318 {1.0, 0.0},
319 {1.0, -0.0}
320};
321static const TableEntry tbl_erfc[] = {
322 {1.0, 0.0},
323 {1.0, -0.0}
324};
325static const TableEntry tbl_erf[] = {
326 {0.0, 0.0},
327 {-0.0, -0.0}
328};
329static const TableEntry tbl_exp[] = {
330 {1.0, 0.0},
331 {1.0, -0.0},
332 {MATH_E2.71828182845904523536028747135266249775724709369996, 1.0}
333};
334static const TableEntry tbl_exp2[] = {
335 {1.0, 0.0},
336 {1.0, -0.0},
337 {2.0, 1.0}
338};
339static const TableEntry tbl_exp10[] = {
340 {1.0, 0.0},
341 {1.0, -0.0},
342 {10.0, 1.0}
343};
344static const TableEntry tbl_expm1[] = {
345 {0.0, 0.0},
346 {-0.0, -0.0}
347};
348static const TableEntry tbl_log[] = {
349 {0.0, 1.0},
350 {1.0, MATH_E2.71828182845904523536028747135266249775724709369996}
351};
352static const TableEntry tbl_log2[] = {
353 {0.0, 1.0},
354 {1.0, 2.0}
355};
356static const TableEntry tbl_log10[] = {
357 {0.0, 1.0},
358 {1.0, 10.0}
359};
360static const TableEntry tbl_rsqrt[] = {
361 {1.0, 1.0},
362 {1.0/MATH_SQRT21.41421356237309504880168872420969807856967187537695, 2.0}
363};
364static const TableEntry tbl_sin[] = {
365 {0.0, 0.0},
366 {-0.0, -0.0}
367};
368static const TableEntry tbl_sinh[] = {
369 {0.0, 0.0},
370 {-0.0, -0.0}
371};
372static const TableEntry tbl_sinpi[] = {
373 {0.0, 0.0},
374 {-0.0, -0.0}
375};
376static const TableEntry tbl_sqrt[] = {
377 {0.0, 0.0},
378 {1.0, 1.0},
379 {MATH_SQRT21.41421356237309504880168872420969807856967187537695, 2.0}
380};
381static const TableEntry tbl_tan[] = {
382 {0.0, 0.0},
383 {-0.0, -0.0}
384};
385static const TableEntry tbl_tanh[] = {
386 {0.0, 0.0},
387 {-0.0, -0.0}
388};
389static const TableEntry tbl_tanpi[] = {
390 {0.0, 0.0},
391 {-0.0, -0.0}
392};
393static const TableEntry tbl_tgamma[] = {
394 {1.0, 1.0},
395 {1.0, 2.0},
396 {2.0, 3.0},
397 {6.0, 4.0}
398};
399
400static bool HasNative(AMDGPULibFunc::EFuncId id) {
401 switch(id) {
402 case AMDGPULibFunc::EI_DIVIDE:
403 case AMDGPULibFunc::EI_COS:
404 case AMDGPULibFunc::EI_EXP:
405 case AMDGPULibFunc::EI_EXP2:
406 case AMDGPULibFunc::EI_EXP10:
407 case AMDGPULibFunc::EI_LOG:
408 case AMDGPULibFunc::EI_LOG2:
409 case AMDGPULibFunc::EI_LOG10:
410 case AMDGPULibFunc::EI_POWR:
411 case AMDGPULibFunc::EI_RECIP:
412 case AMDGPULibFunc::EI_RSQRT:
413 case AMDGPULibFunc::EI_SIN:
414 case AMDGPULibFunc::EI_SINCOS:
415 case AMDGPULibFunc::EI_SQRT:
416 case AMDGPULibFunc::EI_TAN:
417 return true;
418 default:;
419 }
420 return false;
421}
422
423struct TableRef {
424 size_t size;
425 const TableEntry *table; // variable size: from 0 to (size - 1)
426
427 TableRef() : size(0), table(nullptr) {}
428
429 template <size_t N>
430 TableRef(const TableEntry (&tbl)[N]) : size(N), table(&tbl[0]) {}
431};
432
433static TableRef getOptTable(AMDGPULibFunc::EFuncId id) {
434 switch(id) {
435 case AMDGPULibFunc::EI_ACOS: return TableRef(tbl_acos);
436 case AMDGPULibFunc::EI_ACOSH: return TableRef(tbl_acosh);
437 case AMDGPULibFunc::EI_ACOSPI: return TableRef(tbl_acospi);
438 case AMDGPULibFunc::EI_ASIN: return TableRef(tbl_asin);
439 case AMDGPULibFunc::EI_ASINH: return TableRef(tbl_asinh);
440 case AMDGPULibFunc::EI_ASINPI: return TableRef(tbl_asinpi);
441 case AMDGPULibFunc::EI_ATAN: return TableRef(tbl_atan);
442 case AMDGPULibFunc::EI_ATANH: return TableRef(tbl_atanh);
443 case AMDGPULibFunc::EI_ATANPI: return TableRef(tbl_atanpi);
444 case AMDGPULibFunc::EI_CBRT: return TableRef(tbl_cbrt);
445 case AMDGPULibFunc::EI_NCOS:
446 case AMDGPULibFunc::EI_COS: return TableRef(tbl_cos);
447 case AMDGPULibFunc::EI_COSH: return TableRef(tbl_cosh);
448 case AMDGPULibFunc::EI_COSPI: return TableRef(tbl_cospi);
449 case AMDGPULibFunc::EI_ERFC: return TableRef(tbl_erfc);
450 case AMDGPULibFunc::EI_ERF: return TableRef(tbl_erf);
451 case AMDGPULibFunc::EI_EXP: return TableRef(tbl_exp);
452 case AMDGPULibFunc::EI_NEXP2:
453 case AMDGPULibFunc::EI_EXP2: return TableRef(tbl_exp2);
454 case AMDGPULibFunc::EI_EXP10: return TableRef(tbl_exp10);
455 case AMDGPULibFunc::EI_EXPM1: return TableRef(tbl_expm1);
456 case AMDGPULibFunc::EI_LOG: return TableRef(tbl_log);
457 case AMDGPULibFunc::EI_NLOG2:
458 case AMDGPULibFunc::EI_LOG2: return TableRef(tbl_log2);
459 case AMDGPULibFunc::EI_LOG10: return TableRef(tbl_log10);
460 case AMDGPULibFunc::EI_NRSQRT:
461 case AMDGPULibFunc::EI_RSQRT: return TableRef(tbl_rsqrt);
462 case AMDGPULibFunc::EI_NSIN:
463 case AMDGPULibFunc::EI_SIN: return TableRef(tbl_sin);
464 case AMDGPULibFunc::EI_SINH: return TableRef(tbl_sinh);
465 case AMDGPULibFunc::EI_SINPI: return TableRef(tbl_sinpi);
466 case AMDGPULibFunc::EI_NSQRT:
467 case AMDGPULibFunc::EI_SQRT: return TableRef(tbl_sqrt);
468 case AMDGPULibFunc::EI_TAN: return TableRef(tbl_tan);
469 case AMDGPULibFunc::EI_TANH: return TableRef(tbl_tanh);
470 case AMDGPULibFunc::EI_TANPI: return TableRef(tbl_tanpi);
471 case AMDGPULibFunc::EI_TGAMMA: return TableRef(tbl_tgamma);
472 default:;
473 }
474 return TableRef();
475}
476
477static inline int getVecSize(const AMDGPULibFunc& FInfo) {
478 return FInfo.getLeads()[0].VectorSize;
479}
480
481static inline AMDGPULibFunc::EType getArgType(const AMDGPULibFunc& FInfo) {
482 return (AMDGPULibFunc::EType)FInfo.getLeads()[0].ArgType;
483}
484
485FunctionCallee AMDGPULibCalls::getFunction(Module *M, const FuncInfo &fInfo) {
486 // If we are doing PreLinkOpt, the function is external. So it is safe to
487 // use getOrInsertFunction() at this stage.
488
489 return EnablePreLink ? AMDGPULibFunc::getOrInsertFunction(M, fInfo)
490 : AMDGPULibFunc::getFunction(M, fInfo);
491}
492
493bool AMDGPULibCalls::parseFunctionName(const StringRef& FMangledName,
494 FuncInfo *FInfo) {
495 return AMDGPULibFunc::parse(FMangledName, *FInfo);
496}
497
498bool AMDGPULibCalls::isUnsafeMath(const CallInst *CI) const {
499 if (auto Op = dyn_cast<FPMathOperator>(CI))
500 if (Op->isFast())
501 return true;
502 const Function *F = CI->getParent()->getParent();
503 Attribute Attr = F->getFnAttribute("unsafe-fp-math");
504 return Attr.getValueAsString() == "true";
505}
506
507bool AMDGPULibCalls::useNativeFunc(const StringRef F) const {
508 return AllNative ||
509 std::find(UseNative.begin(), UseNative.end(), F) != UseNative.end();
510}
511
512void AMDGPULibCalls::initNativeFuncs() {
513 AllNative = useNativeFunc("all") ||
514 (UseNative.getNumOccurrences() && UseNative.size() == 1 &&
515 UseNative.begin()->empty());
516}
517
518bool AMDGPULibCalls::sincosUseNative(CallInst *aCI, const FuncInfo &FInfo) {
519 bool native_sin = useNativeFunc("sin");
520 bool native_cos = useNativeFunc("cos");
521
522 if (native_sin && native_cos) {
523 Module *M = aCI->getModule();
524 Value *opr0 = aCI->getArgOperand(0);
525
526 AMDGPULibFunc nf;
527 nf.getLeads()[0].ArgType = FInfo.getLeads()[0].ArgType;
528 nf.getLeads()[0].VectorSize = FInfo.getLeads()[0].VectorSize;
529
530 nf.setPrefix(AMDGPULibFunc::NATIVE);
531 nf.setId(AMDGPULibFunc::EI_SIN);
532 FunctionCallee sinExpr = getFunction(M, nf);
533
534 nf.setPrefix(AMDGPULibFunc::NATIVE);
535 nf.setId(AMDGPULibFunc::EI_COS);
536 FunctionCallee cosExpr = getFunction(M, nf);
537 if (sinExpr && cosExpr) {
538 Value *sinval = CallInst::Create(sinExpr, opr0, "splitsin", aCI);
539 Value *cosval = CallInst::Create(cosExpr, opr0, "splitcos", aCI);
540 new StoreInst(cosval, aCI->getArgOperand(1), aCI);
541
542 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)
543 << " 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)
;
544
545 replaceCall(sinval);
546 return true;
547 }
548 }
549 return false;
550}
551
552bool AMDGPULibCalls::useNative(CallInst *aCI) {
553 CI = aCI;
554 Function *Callee = aCI->getCalledFunction();
555
556 FuncInfo FInfo;
557 if (!parseFunctionName(Callee->getName(), &FInfo) || !FInfo.isMangled() ||
558 FInfo.getPrefix() != AMDGPULibFunc::NOPFX ||
559 getArgType(FInfo) == AMDGPULibFunc::F64 || !HasNative(FInfo.getId()) ||
560 !(AllNative || useNativeFunc(FInfo.getName()))) {
561 return false;
562 }
563
564 if (FInfo.getId() == AMDGPULibFunc::EI_SINCOS)
565 return sincosUseNative(aCI, FInfo);
566
567 FInfo.setPrefix(AMDGPULibFunc::NATIVE);
568 FunctionCallee F = getFunction(aCI->getModule(), FInfo);
569 if (!F)
570 return false;
571
572 aCI->setCalledFunction(F);
573 DEBUG_WITH_TYPE("usenative", dbgs() << "<useNative> replace " << *aCIdo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("usenative")) { dbgs() << "<useNative> replace "
<< *aCI << " with native version"; } } while (false
)
574 << " with native version")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("usenative")) { dbgs() << "<useNative> replace "
<< *aCI << " with native version"; } } while (false
)
;
575 return true;
576}
577
578// Clang emits call of __read_pipe_2 or __read_pipe_4 for OpenCL read_pipe
579// builtin, with appended type size and alignment arguments, where 2 or 4
580// indicates the original number of arguments. The library has optimized version
581// of __read_pipe_2/__read_pipe_4 when the type size and alignment has the same
582// power of 2 value. This function transforms __read_pipe_2 to __read_pipe_2_N
583// for such cases where N is the size in bytes of the type (N = 1, 2, 4, 8, ...,
584// 128). The same for __read_pipe_4, write_pipe_2, and write_pipe_4.
585bool AMDGPULibCalls::fold_read_write_pipe(CallInst *CI, IRBuilder<> &B,
586 FuncInfo &FInfo) {
587 auto *Callee = CI->getCalledFunction();
588 if (!Callee->isDeclaration())
589 return false;
590
591 assert(Callee->hasName() && "Invalid read_pipe/write_pipe function")((Callee->hasName() && "Invalid read_pipe/write_pipe function"
) ? static_cast<void> (0) : __assert_fail ("Callee->hasName() && \"Invalid read_pipe/write_pipe function\""
, "/build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 591, __PRETTY_FUNCTION__))
;
592 auto *M = Callee->getParent();
593 auto &Ctx = M->getContext();
594 std::string Name = Callee->getName();
595 auto NumArg = CI->getNumArgOperands();
596 if (NumArg != 4 && NumArg != 6)
597 return false;
598 auto *PacketSize = CI->getArgOperand(NumArg - 2);
599 auto *PacketAlign = CI->getArgOperand(NumArg - 1);
600 if (!isa<ConstantInt>(PacketSize) || !isa<ConstantInt>(PacketAlign))
601 return false;
602 unsigned Size = cast<ConstantInt>(PacketSize)->getZExtValue();
603 unsigned Align = cast<ConstantInt>(PacketAlign)->getZExtValue();
604 if (Size != Align || !isPowerOf2_32(Size))
605 return false;
606
607 Type *PtrElemTy;
608 if (Size <= 8)
609 PtrElemTy = Type::getIntNTy(Ctx, Size * 8);
610 else
611 PtrElemTy = VectorType::get(Type::getInt64Ty(Ctx), Size / 8);
612 unsigned PtrArgLoc = CI->getNumArgOperands() - 3;
613 auto PtrArg = CI->getArgOperand(PtrArgLoc);
614 unsigned PtrArgAS = PtrArg->getType()->getPointerAddressSpace();
615 auto *PtrTy = llvm::PointerType::get(PtrElemTy, PtrArgAS);
616
617 SmallVector<llvm::Type *, 6> ArgTys;
618 for (unsigned I = 0; I != PtrArgLoc; ++I)
619 ArgTys.push_back(CI->getArgOperand(I)->getType());
620 ArgTys.push_back(PtrTy);
621
622 Name = Name + "_" + std::to_string(Size);
623 auto *FTy = FunctionType::get(Callee->getReturnType(),
624 ArrayRef<Type *>(ArgTys), false);
625 AMDGPULibFunc NewLibFunc(Name, FTy);
626 FunctionCallee F = AMDGPULibFunc::getOrInsertFunction(M, NewLibFunc);
627 if (!F)
628 return false;
629
630 auto *BCast = B.CreatePointerCast(PtrArg, PtrTy);
631 SmallVector<Value *, 6> Args;
632 for (unsigned I = 0; I != PtrArgLoc; ++I)
633 Args.push_back(CI->getArgOperand(I));
634 Args.push_back(BCast);
635
636 auto *NCI = B.CreateCall(F, Args);
637 NCI->setAttributes(CI->getAttributes());
638 CI->replaceAllUsesWith(NCI);
639 CI->dropAllReferences();
640 CI->eraseFromParent();
641
642 return true;
643}
644
645// This function returns false if no change; return true otherwise.
646bool AMDGPULibCalls::fold(CallInst *CI, AliasAnalysis *AA) {
647 this->CI = CI;
648 Function *Callee = CI->getCalledFunction();
649
650 // Ignore indirect calls.
651 if (Callee
13.1
'Callee' is not equal to null
== 0) return false;
14
Taking false branch
652
653 BasicBlock *BB = CI->getParent();
654 LLVMContext &Context = CI->getParent()->getContext();
655 IRBuilder<> B(Context);
656
657 // Set the builder to the instruction after the call.
658 B.SetInsertPoint(BB, CI->getIterator());
659
660 // Copy fast flags from the original call.
661 if (const FPMathOperator *FPOp
15.1
'FPOp' is null
= dyn_cast<const FPMathOperator>(CI))
15
Assuming 'CI' is not a 'FPMathOperator'
16
Taking false branch
662 B.setFastMathFlags(FPOp->getFastMathFlags());
663
664 switch (Callee->getIntrinsicID()) {
17
Control jumps to the 'default' case at line 665
665 default:
666 break;
18
Execution continues on line 671
667 case Intrinsic::amdgcn_wavefrontsize:
668 return !EnablePreLink && fold_wavefrontsize(CI, B);
669 }
670
671 FuncInfo FInfo;
672 if (!parseFunctionName(Callee->getName(), &FInfo))
19
Assuming the condition is false
20
Taking false branch
673 return false;
674
675 // Further check the number of arguments to see if they match.
676 if (CI->getNumArgOperands() != FInfo.getNumArgs())
21
Assuming the condition is false
22
Taking false branch
677 return false;
678
679 if (TDOFold(CI, FInfo))
23
Taking false branch
680 return true;
681
682 // Under unsafe-math, evaluate calls if possible.
683 // According to Brian Sumner, we can do this for all f32 function calls
684 // using host's double function calls.
685 if (isUnsafeMath(CI) && evaluateCall(CI, FInfo))
24
Assuming the condition is true
25
Calling 'AMDGPULibCalls::evaluateCall'
686 return true;
687
688 // Specilized optimizations for each function call
689 switch (FInfo.getId()) {
690 case AMDGPULibFunc::EI_RECIP:
691 // skip vector function
692 assert ((FInfo.getPrefix() == AMDGPULibFunc::NATIVE ||(((FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix
() == AMDGPULibFunc::HALF) && "recip must be an either native or half function"
) ? static_cast<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-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 694, __PRETTY_FUNCTION__))
693 FInfo.getPrefix() == AMDGPULibFunc::HALF) &&(((FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix
() == AMDGPULibFunc::HALF) && "recip must be an either native or half function"
) ? static_cast<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-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 694, __PRETTY_FUNCTION__))
694 "recip must be an either native or half function")(((FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix
() == AMDGPULibFunc::HALF) && "recip must be an either native or half function"
) ? static_cast<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-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 694, __PRETTY_FUNCTION__))
;
695 return (getVecSize(FInfo) != 1) ? false : fold_recip(CI, B, FInfo);
696
697 case AMDGPULibFunc::EI_DIVIDE:
698 // skip vector function
699 assert ((FInfo.getPrefix() == AMDGPULibFunc::NATIVE ||(((FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix
() == AMDGPULibFunc::HALF) && "divide must be an either native or half function"
) ? static_cast<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-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 701, __PRETTY_FUNCTION__))
700 FInfo.getPrefix() == AMDGPULibFunc::HALF) &&(((FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix
() == AMDGPULibFunc::HALF) && "divide must be an either native or half function"
) ? static_cast<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-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 701, __PRETTY_FUNCTION__))
701 "divide must be an either native or half function")(((FInfo.getPrefix() == AMDGPULibFunc::NATIVE || FInfo.getPrefix
() == AMDGPULibFunc::HALF) && "divide must be an either native or half function"
) ? static_cast<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-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 701, __PRETTY_FUNCTION__))
;
702 return (getVecSize(FInfo) != 1) ? false : fold_divide(CI, B, FInfo);
703
704 case AMDGPULibFunc::EI_POW:
705 case AMDGPULibFunc::EI_POWR:
706 case AMDGPULibFunc::EI_POWN:
707 return fold_pow(CI, B, FInfo);
708
709 case AMDGPULibFunc::EI_ROOTN:
710 // skip vector function
711 return (getVecSize(FInfo) != 1) ? false : fold_rootn(CI, B, FInfo);
712
713 case AMDGPULibFunc::EI_FMA:
714 case AMDGPULibFunc::EI_MAD:
715 case AMDGPULibFunc::EI_NFMA:
716 // skip vector function
717 return (getVecSize(FInfo) != 1) ? false : fold_fma_mad(CI, B, FInfo);
718
719 case AMDGPULibFunc::EI_SQRT:
720 return isUnsafeMath(CI) && fold_sqrt(CI, B, FInfo);
721 case AMDGPULibFunc::EI_COS:
722 case AMDGPULibFunc::EI_SIN:
723 if ((getArgType(FInfo) == AMDGPULibFunc::F32 ||
724 getArgType(FInfo) == AMDGPULibFunc::F64)
725 && (FInfo.getPrefix() == AMDGPULibFunc::NOPFX))
726 return fold_sincos(CI, B, AA);
727
728 break;
729 case AMDGPULibFunc::EI_READ_PIPE_2:
730 case AMDGPULibFunc::EI_READ_PIPE_4:
731 case AMDGPULibFunc::EI_WRITE_PIPE_2:
732 case AMDGPULibFunc::EI_WRITE_PIPE_4:
733 return fold_read_write_pipe(CI, B, FInfo);
734
735 default:
736 break;
737 }
738
739 return false;
740}
741
742bool AMDGPULibCalls::TDOFold(CallInst *CI, const FuncInfo &FInfo) {
743 // Table-Driven optimization
744 const TableRef tr = getOptTable(FInfo.getId());
745 if (tr.size==0)
746 return false;
747
748 int const sz = (int)tr.size;
749 const TableEntry * const ftbl = tr.table;
750 Value *opr0 = CI->getArgOperand(0);
751
752 if (getVecSize(FInfo) > 1) {
753 if (ConstantDataVector *CV = dyn_cast<ConstantDataVector>(opr0)) {
754 SmallVector<double, 0> DVal;
755 for (int eltNo = 0; eltNo < getVecSize(FInfo); ++eltNo) {
756 ConstantFP *eltval = dyn_cast<ConstantFP>(
757 CV->getElementAsConstant((unsigned)eltNo));
758 assert(eltval && "Non-FP arguments in math function!")((eltval && "Non-FP arguments in math function!") ? static_cast
<void> (0) : __assert_fail ("eltval && \"Non-FP arguments in math function!\""
, "/build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 758, __PRETTY_FUNCTION__))
;
759 bool found = false;
760 for (int i=0; i < sz; ++i) {
761 if (eltval->isExactlyValue(ftbl[i].input)) {
762 DVal.push_back(ftbl[i].result);
763 found = true;
764 break;
765 }
766 }
767 if (!found) {
768 // This vector constants not handled yet.
769 return false;
770 }
771 }
772 LLVMContext &context = CI->getParent()->getParent()->getContext();
773 Constant *nval;
774 if (getArgType(FInfo) == AMDGPULibFunc::F32) {
775 SmallVector<float, 0> FVal;
776 for (unsigned i = 0; i < DVal.size(); ++i) {
777 FVal.push_back((float)DVal[i]);
778 }
779 ArrayRef<float> tmp(FVal);
780 nval = ConstantDataVector::get(context, tmp);
781 } else { // F64
782 ArrayRef<double> tmp(DVal);
783 nval = ConstantDataVector::get(context, tmp);
784 }
785 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *nval << "\n"; } } while
(false)
;
786 replaceCall(nval);
787 return true;
788 }
789 } else {
790 // Scalar version
791 if (ConstantFP *CF = dyn_cast<ConstantFP>(opr0)) {
792 for (int i = 0; i < sz; ++i) {
793 if (CF->isExactlyValue(ftbl[i].input)) {
794 Value *nval = ConstantFP::get(CF->getType(), ftbl[i].result);
795 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *nval << "\n"; } } while
(false)
;
796 replaceCall(nval);
797 return true;
798 }
799 }
800 }
801 }
802
803 return false;
804}
805
806bool AMDGPULibCalls::replaceWithNative(CallInst *CI, const FuncInfo &FInfo) {
807 Module *M = CI->getModule();
808 if (getArgType(FInfo) != AMDGPULibFunc::F32 ||
809 FInfo.getPrefix() != AMDGPULibFunc::NOPFX ||
810 !HasNative(FInfo.getId()))
811 return false;
812
813 AMDGPULibFunc nf = FInfo;
814 nf.setPrefix(AMDGPULibFunc::NATIVE);
815 if (FunctionCallee FPExpr = getFunction(M, nf)) {
816 LLVM_DEBUG(dbgs() << "AMDIC: " << *CI << " ---> ")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { dbgs() << "AMDIC: " << *
CI << " ---> "; } } while (false)
;
817
818 CI->setCalledFunction(FPExpr);
819
820 LLVM_DEBUG(dbgs() << *CI << '\n')do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { dbgs() << *CI << '\n'; }
} while (false)
;
821
822 return true;
823 }
824 return false;
825}
826
827// [native_]half_recip(c) ==> 1.0/c
828bool AMDGPULibCalls::fold_recip(CallInst *CI, IRBuilder<> &B,
829 const FuncInfo &FInfo) {
830 Value *opr0 = CI->getArgOperand(0);
831 if (ConstantFP *CF = dyn_cast<ConstantFP>(opr0)) {
832 // Just create a normal div. Later, InstCombine will be able
833 // to compute the divide into a constant (avoid check float infinity
834 // or subnormal at this point).
835 Value *nval = B.CreateFDiv(ConstantFP::get(CF->getType(), 1.0),
836 opr0,
837 "recip2div");
838 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *nval << "\n"; } } while
(false)
;
839 replaceCall(nval);
840 return true;
841 }
842 return false;
843}
844
845// [native_]half_divide(x, c) ==> x/c
846bool AMDGPULibCalls::fold_divide(CallInst *CI, IRBuilder<> &B,
847 const FuncInfo &FInfo) {
848 Value *opr0 = CI->getArgOperand(0);
849 Value *opr1 = CI->getArgOperand(1);
850 ConstantFP *CF0 = dyn_cast<ConstantFP>(opr0);
851 ConstantFP *CF1 = dyn_cast<ConstantFP>(opr1);
852
853 if ((CF0 && CF1) || // both are constants
854 (CF1 && (getArgType(FInfo) == AMDGPULibFunc::F32)))
855 // CF1 is constant && f32 divide
856 {
857 Value *nval1 = B.CreateFDiv(ConstantFP::get(opr1->getType(), 1.0),
858 opr1, "__div2recip");
859 Value *nval = B.CreateFMul(opr0, nval1, "__div2mul");
860 replaceCall(nval);
861 return true;
862 }
863 return false;
864}
865
866namespace llvm {
867static double log2(double V) {
868#if _XOPEN_SOURCE700 >= 600 || defined(_ISOC99_SOURCE1) || _POSIX_C_SOURCE200809L >= 200112L
869 return ::log2(V);
870#else
871 return log(V) / 0.693147180559945309417;
872#endif
873}
874}
875
876bool AMDGPULibCalls::fold_pow(CallInst *CI, IRBuilder<> &B,
877 const FuncInfo &FInfo) {
878 assert((FInfo.getId() == AMDGPULibFunc::EI_POW ||(((FInfo.getId() == AMDGPULibFunc::EI_POW || FInfo.getId() ==
AMDGPULibFunc::EI_POWR || FInfo.getId() == AMDGPULibFunc::EI_POWN
) && "fold_pow: encounter a wrong function call") ? static_cast
<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-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 881, __PRETTY_FUNCTION__))
879 FInfo.getId() == AMDGPULibFunc::EI_POWR ||(((FInfo.getId() == AMDGPULibFunc::EI_POW || FInfo.getId() ==
AMDGPULibFunc::EI_POWR || FInfo.getId() == AMDGPULibFunc::EI_POWN
) && "fold_pow: encounter a wrong function call") ? static_cast
<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-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 881, __PRETTY_FUNCTION__))
880 FInfo.getId() == AMDGPULibFunc::EI_POWN) &&(((FInfo.getId() == AMDGPULibFunc::EI_POW || FInfo.getId() ==
AMDGPULibFunc::EI_POWR || FInfo.getId() == AMDGPULibFunc::EI_POWN
) && "fold_pow: encounter a wrong function call") ? static_cast
<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-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 881, __PRETTY_FUNCTION__))
881 "fold_pow: encounter a wrong function call")(((FInfo.getId() == AMDGPULibFunc::EI_POW || FInfo.getId() ==
AMDGPULibFunc::EI_POWR || FInfo.getId() == AMDGPULibFunc::EI_POWN
) && "fold_pow: encounter a wrong function call") ? static_cast
<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-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 881, __PRETTY_FUNCTION__))
;
882
883 Value *opr0, *opr1;
884 ConstantFP *CF;
885 ConstantInt *CINT;
886 ConstantAggregateZero *CZero;
887 Type *eltType;
888
889 opr0 = CI->getArgOperand(0);
890 opr1 = CI->getArgOperand(1);
891 CZero = dyn_cast<ConstantAggregateZero>(opr1);
892 if (getVecSize(FInfo) == 1) {
893 eltType = opr0->getType();
894 CF = dyn_cast<ConstantFP>(opr1);
895 CINT = dyn_cast<ConstantInt>(opr1);
896 } else {
897 VectorType *VTy = dyn_cast<VectorType>(opr0->getType());
898 assert(VTy && "Oprand of vector function should be of vectortype")((VTy && "Oprand of vector function should be of vectortype"
) ? static_cast<void> (0) : __assert_fail ("VTy && \"Oprand of vector function should be of vectortype\""
, "/build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 898, __PRETTY_FUNCTION__))
;
899 eltType = VTy->getElementType();
900 ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(opr1);
901
902 // Now, only Handle vector const whose elements have the same value.
903 CF = CDV ? dyn_cast_or_null<ConstantFP>(CDV->getSplatValue()) : nullptr;
904 CINT = CDV ? dyn_cast_or_null<ConstantInt>(CDV->getSplatValue()) : nullptr;
905 }
906
907 // No unsafe math , no constant argument, do nothing
908 if (!isUnsafeMath(CI) && !CF && !CINT && !CZero)
909 return false;
910
911 // 0x1111111 means that we don't do anything for this call.
912 int ci_opr1 = (CINT ? (int)CINT->getSExtValue() : 0x1111111);
913
914 if ((CF && CF->isZero()) || (CINT && ci_opr1 == 0) || CZero) {
915 // pow/powr/pown(x, 0) == 1
916 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> 1\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> 1\n"; } } while (false)
;
917 Constant *cnval = ConstantFP::get(eltType, 1.0);
918 if (getVecSize(FInfo) > 1) {
919 cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
920 }
921 replaceCall(cnval);
922 return true;
923 }
924 if ((CF && CF->isExactlyValue(1.0)) || (CINT && ci_opr1 == 1)) {
925 // pow/powr/pown(x, 1.0) = x
926 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << "\n"; } } while
(false)
;
927 replaceCall(opr0);
928 return true;
929 }
930 if ((CF && CF->isExactlyValue(2.0)) || (CINT && ci_opr1 == 2)) {
931 // pow/powr/pown(x, 2.0) = x*x
932 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << " * " << *opr0do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " * " <<
*opr0 << "\n"; } } while (false)
933 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " * " <<
*opr0 << "\n"; } } while (false)
;
934 Value *nval = B.CreateFMul(opr0, opr0, "__pow2");
935 replaceCall(nval);
936 return true;
937 }
938 if ((CF && CF->isExactlyValue(-1.0)) || (CINT && ci_opr1 == -1)) {
939 // pow/powr/pown(x, -1.0) = 1.0/x
940 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> 1 / " << *opr0 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> 1 / " << *opr0 << "\n"; } }
while (false)
;
941 Constant *cnval = ConstantFP::get(eltType, 1.0);
942 if (getVecSize(FInfo) > 1) {
943 cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
944 }
945 Value *nval = B.CreateFDiv(cnval, opr0, "__powrecip");
946 replaceCall(nval);
947 return true;
948 }
949
950 Module *M = CI->getModule();
951 if (CF && (CF->isExactlyValue(0.5) || CF->isExactlyValue(-0.5))) {
952 // pow[r](x, [-]0.5) = sqrt(x)
953 bool issqrt = CF->isExactlyValue(0.5);
954 if (FunctionCallee FPExpr =
955 getFunction(M, AMDGPULibFunc(issqrt ? AMDGPULibFunc::EI_SQRT
956 : AMDGPULibFunc::EI_RSQRT,
957 FInfo))) {
958 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << FInfo.getName().c_str() <<
"(" << *opr0 << ")\n"; } } while (false)
959 << 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)
;
960 Value *nval = CreateCallEx(B,FPExpr, opr0, issqrt ? "__pow2sqrt"
961 : "__pow2rsqrt");
962 replaceCall(nval);
963 return true;
964 }
965 }
966
967 if (!isUnsafeMath(CI))
968 return false;
969
970 // Unsafe Math optimization
971
972 // Remember that ci_opr1 is set if opr1 is integral
973 if (CF) {
974 double dval = (getArgType(FInfo) == AMDGPULibFunc::F32)
975 ? (double)CF->getValueAPF().convertToFloat()
976 : CF->getValueAPF().convertToDouble();
977 int ival = (int)dval;
978 if ((double)ival == dval) {
979 ci_opr1 = ival;
980 } else
981 ci_opr1 = 0x11111111;
982 }
983
984 // pow/powr/pown(x, c) = [1/](x*x*..x); where
985 // trunc(c) == c && the number of x == c && |c| <= 12
986 unsigned abs_opr1 = (ci_opr1 < 0) ? -ci_opr1 : ci_opr1;
987 if (abs_opr1 <= 12) {
988 Constant *cnval;
989 Value *nval;
990 if (abs_opr1 == 0) {
991 cnval = ConstantFP::get(eltType, 1.0);
992 if (getVecSize(FInfo) > 1) {
993 cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
994 }
995 nval = cnval;
996 } else {
997 Value *valx2 = nullptr;
998 nval = nullptr;
999 while (abs_opr1 > 0) {
1000 valx2 = valx2 ? B.CreateFMul(valx2, valx2, "__powx2") : opr0;
1001 if (abs_opr1 & 1) {
1002 nval = nval ? B.CreateFMul(nval, valx2, "__powprod") : valx2;
1003 }
1004 abs_opr1 >>= 1;
1005 }
1006 }
1007
1008 if (ci_opr1 < 0) {
1009 cnval = ConstantFP::get(eltType, 1.0);
1010 if (getVecSize(FInfo) > 1) {
1011 cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
1012 }
1013 nval = B.CreateFDiv(cnval, nval, "__1powprod");
1014 }
1015 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)
1016 << ((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)
1017 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << ((ci_opr1 < 0) ? "1/prod("
: "prod(") << *opr0 << ")\n"; } } while (false)
;
1018 replaceCall(nval);
1019 return true;
1020 }
1021
1022 // powr ---> exp2(y * log2(x))
1023 // pown/pow ---> powr(fabs(x), y) | (x & ((int)y << 31))
1024 FunctionCallee ExpExpr =
1025 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_EXP2, FInfo));
1026 if (!ExpExpr)
1027 return false;
1028
1029 bool needlog = false;
1030 bool needabs = false;
1031 bool needcopysign = false;
1032 Constant *cnval = nullptr;
1033 if (getVecSize(FInfo) == 1) {
1034 CF = dyn_cast<ConstantFP>(opr0);
1035
1036 if (CF) {
1037 double V = (getArgType(FInfo) == AMDGPULibFunc::F32)
1038 ? (double)CF->getValueAPF().convertToFloat()
1039 : CF->getValueAPF().convertToDouble();
1040
1041 V = log2(std::abs(V));
1042 cnval = ConstantFP::get(eltType, V);
1043 needcopysign = (FInfo.getId() != AMDGPULibFunc::EI_POWR) &&
1044 CF->isNegative();
1045 } else {
1046 needlog = true;
1047 needcopysign = needabs = FInfo.getId() != AMDGPULibFunc::EI_POWR &&
1048 (!CF || CF->isNegative());
1049 }
1050 } else {
1051 ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(opr0);
1052
1053 if (!CDV) {
1054 needlog = true;
1055 needcopysign = needabs = FInfo.getId() != AMDGPULibFunc::EI_POWR;
1056 } else {
1057 assert ((int)CDV->getNumElements() == getVecSize(FInfo) &&(((int)CDV->getNumElements() == getVecSize(FInfo) &&
"Wrong vector size detected") ? static_cast<void> (0) :
__assert_fail ("(int)CDV->getNumElements() == getVecSize(FInfo) && \"Wrong vector size detected\""
, "/build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1058, __PRETTY_FUNCTION__))
1058 "Wrong vector size detected")(((int)CDV->getNumElements() == getVecSize(FInfo) &&
"Wrong vector size detected") ? static_cast<void> (0) :
__assert_fail ("(int)CDV->getNumElements() == getVecSize(FInfo) && \"Wrong vector size detected\""
, "/build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1058, __PRETTY_FUNCTION__))
;
1059
1060 SmallVector<double, 0> DVal;
1061 for (int i=0; i < getVecSize(FInfo); ++i) {
1062 double V = (getArgType(FInfo) == AMDGPULibFunc::F32)
1063 ? (double)CDV->getElementAsFloat(i)
1064 : CDV->getElementAsDouble(i);
1065 if (V < 0.0) needcopysign = true;
1066 V = log2(std::abs(V));
1067 DVal.push_back(V);
1068 }
1069 if (getArgType(FInfo) == AMDGPULibFunc::F32) {
1070 SmallVector<float, 0> FVal;
1071 for (unsigned i=0; i < DVal.size(); ++i) {
1072 FVal.push_back((float)DVal[i]);
1073 }
1074 ArrayRef<float> tmp(FVal);
1075 cnval = ConstantDataVector::get(M->getContext(), tmp);
1076 } else {
1077 ArrayRef<double> tmp(DVal);
1078 cnval = ConstantDataVector::get(M->getContext(), tmp);
1079 }
1080 }
1081 }
1082
1083 if (needcopysign && (FInfo.getId() == AMDGPULibFunc::EI_POW)) {
1084 // We cannot handle corner cases for a general pow() function, give up
1085 // unless y is a constant integral value. Then proceed as if it were pown.
1086 if (getVecSize(FInfo) == 1) {
1087 if (const ConstantFP *CF = dyn_cast<ConstantFP>(opr1)) {
1088 double y = (getArgType(FInfo) == AMDGPULibFunc::F32)
1089 ? (double)CF->getValueAPF().convertToFloat()
1090 : CF->getValueAPF().convertToDouble();
1091 if (y != (double)(int64_t)y)
1092 return false;
1093 } else
1094 return false;
1095 } else {
1096 if (const ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(opr1)) {
1097 for (int i=0; i < getVecSize(FInfo); ++i) {
1098 double y = (getArgType(FInfo) == AMDGPULibFunc::F32)
1099 ? (double)CDV->getElementAsFloat(i)
1100 : CDV->getElementAsDouble(i);
1101 if (y != (double)(int64_t)y)
1102 return false;
1103 }
1104 } else
1105 return false;
1106 }
1107 }
1108
1109 Value *nval;
1110 if (needabs) {
1111 FunctionCallee AbsExpr =
1112 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_FABS, FInfo));
1113 if (!AbsExpr)
1114 return false;
1115 nval = CreateCallEx(B, AbsExpr, opr0, "__fabs");
1116 } else {
1117 nval = cnval ? cnval : opr0;
1118 }
1119 if (needlog) {
1120 FunctionCallee LogExpr =
1121 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_LOG2, FInfo));
1122 if (!LogExpr)
1123 return false;
1124 nval = CreateCallEx(B,LogExpr, nval, "__log2");
1125 }
1126
1127 if (FInfo.getId() == AMDGPULibFunc::EI_POWN) {
1128 // convert int(32) to fp(f32 or f64)
1129 opr1 = B.CreateSIToFP(opr1, nval->getType(), "pownI2F");
1130 }
1131 nval = B.CreateFMul(opr1, nval, "__ylogx");
1132 nval = CreateCallEx(B,ExpExpr, nval, "__exp2");
1133
1134 if (needcopysign) {
1135 Value *opr_n;
1136 Type* rTy = opr0->getType();
1137 Type* nTyS = eltType->isDoubleTy() ? B.getInt64Ty() : B.getInt32Ty();
1138 Type *nTy = nTyS;
1139 if (const VectorType *vTy = dyn_cast<VectorType>(rTy))
1140 nTy = VectorType::get(nTyS, vTy->getNumElements());
1141 unsigned size = nTy->getScalarSizeInBits();
1142 opr_n = CI->getArgOperand(1);
1143 if (opr_n->getType()->isIntegerTy())
1144 opr_n = B.CreateZExtOrBitCast(opr_n, nTy, "__ytou");
1145 else
1146 opr_n = B.CreateFPToSI(opr1, nTy, "__ytou");
1147
1148 Value *sign = B.CreateShl(opr_n, size-1, "__yeven");
1149 sign = B.CreateAnd(B.CreateBitCast(opr0, nTy), sign, "__pow_sign");
1150 nval = B.CreateOr(B.CreateBitCast(nval, nTy), sign);
1151 nval = B.CreateBitCast(nval, opr0->getType());
1152 }
1153
1154 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << "exp2(" << *opr1 <<
" * log2(" << *opr0 << "))\n"; } } while (false)
1155 << "exp2(" << *opr1 << " * log2(" << *opr0 << "))\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << "exp2(" << *opr1 <<
" * log2(" << *opr0 << "))\n"; } } while (false)
;
1156 replaceCall(nval);
1157
1158 return true;
1159}
1160
1161bool AMDGPULibCalls::fold_rootn(CallInst *CI, IRBuilder<> &B,
1162 const FuncInfo &FInfo) {
1163 Value *opr0 = CI->getArgOperand(0);
1164 Value *opr1 = CI->getArgOperand(1);
1165
1166 ConstantInt *CINT = dyn_cast<ConstantInt>(opr1);
1167 if (!CINT) {
1168 return false;
1169 }
1170 int ci_opr1 = (int)CINT->getSExtValue();
1171 if (ci_opr1 == 1) { // rootn(x, 1) = x
1172 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << "\n"; } } while
(false)
;
1173 replaceCall(opr0);
1174 return true;
1175 }
1176 if (ci_opr1 == 2) { // rootn(x, 2) = sqrt(x)
1177 std::vector<const Type*> ParamsTys;
1178 ParamsTys.push_back(opr0->getType());
1179 Module *M = CI->getModule();
1180 if (FunctionCallee FPExpr =
1181 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_SQRT, FInfo))) {
1182 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> sqrt(" << *opr0 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> sqrt(" << *opr0 << ")\n"; }
} while (false)
;
1183 Value *nval = CreateCallEx(B,FPExpr, opr0, "__rootn2sqrt");
1184 replaceCall(nval);
1185 return true;
1186 }
1187 } else if (ci_opr1 == 3) { // rootn(x, 3) = cbrt(x)
1188 Module *M = CI->getModule();
1189 if (FunctionCallee FPExpr =
1190 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_CBRT, FInfo))) {
1191 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> cbrt(" << *opr0 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> cbrt(" << *opr0 << ")\n"; }
} while (false)
;
1192 Value *nval = CreateCallEx(B,FPExpr, opr0, "__rootn2cbrt");
1193 replaceCall(nval);
1194 return true;
1195 }
1196 } else if (ci_opr1 == -1) { // rootn(x, -1) = 1.0/x
1197 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)
;
1198 Value *nval = B.CreateFDiv(ConstantFP::get(opr0->getType(), 1.0),
1199 opr0,
1200 "__rootn2div");
1201 replaceCall(nval);
1202 return true;
1203 } else if (ci_opr1 == -2) { // rootn(x, -2) = rsqrt(x)
1204 std::vector<const Type*> ParamsTys;
1205 ParamsTys.push_back(opr0->getType());
1206 Module *M = CI->getModule();
1207 if (FunctionCallee FPExpr =
1208 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_RSQRT, FInfo))) {
1209 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> rsqrt(" << *opr0do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> rsqrt(" << *opr0 << ")\n"; }
} while (false)
1210 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> rsqrt(" << *opr0 << ")\n"; }
} while (false)
;
1211 Value *nval = CreateCallEx(B,FPExpr, opr0, "__rootn2rsqrt");
1212 replaceCall(nval);
1213 return true;
1214 }
1215 }
1216 return false;
1217}
1218
1219bool AMDGPULibCalls::fold_fma_mad(CallInst *CI, IRBuilder<> &B,
1220 const FuncInfo &FInfo) {
1221 Value *opr0 = CI->getArgOperand(0);
1222 Value *opr1 = CI->getArgOperand(1);
1223 Value *opr2 = CI->getArgOperand(2);
1224
1225 ConstantFP *CF0 = dyn_cast<ConstantFP>(opr0);
1226 ConstantFP *CF1 = dyn_cast<ConstantFP>(opr1);
1227 if ((CF0 && CF0->isZero()) || (CF1 && CF1->isZero())) {
1228 // fma/mad(a, b, c) = c if a=0 || b=0
1229 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr2 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr2 << "\n"; } } while
(false)
;
1230 replaceCall(opr2);
1231 return true;
1232 }
1233 if (CF0 && CF0->isExactlyValue(1.0f)) {
1234 // fma/mad(a, b, c) = b+c if a=1
1235 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr1 << " + " << *opr2do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr1 << " + " <<
*opr2 << "\n"; } } while (false)
1236 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr1 << " + " <<
*opr2 << "\n"; } } while (false)
;
1237 Value *nval = B.CreateFAdd(opr1, opr2, "fmaadd");
1238 replaceCall(nval);
1239 return true;
1240 }
1241 if (CF1 && CF1->isExactlyValue(1.0f)) {
1242 // fma/mad(a, b, c) = a+c if b=1
1243 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << " + " << *opr2do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " + " <<
*opr2 << "\n"; } } while (false)
1244 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " + " <<
*opr2 << "\n"; } } while (false)
;
1245 Value *nval = B.CreateFAdd(opr0, opr2, "fmaadd");
1246 replaceCall(nval);
1247 return true;
1248 }
1249 if (ConstantFP *CF = dyn_cast<ConstantFP>(opr2)) {
1250 if (CF->isZero()) {
1251 // fma/mad(a, b, c) = a*b if c=0
1252 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << " * "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " * " <<
*opr1 << "\n"; } } while (false)
1253 << *opr1 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " * " <<
*opr1 << "\n"; } } while (false)
;
1254 Value *nval = B.CreateFMul(opr0, opr1, "fmamul");
1255 replaceCall(nval);
1256 return true;
1257 }
1258 }
1259
1260 return false;
1261}
1262
1263// Get a scalar native builtin signle argument FP function
1264FunctionCallee AMDGPULibCalls::getNativeFunction(Module *M,
1265 const FuncInfo &FInfo) {
1266 if (getArgType(FInfo) == AMDGPULibFunc::F64 || !HasNative(FInfo.getId()))
1267 return nullptr;
1268 FuncInfo nf = FInfo;
1269 nf.setPrefix(AMDGPULibFunc::NATIVE);
1270 return getFunction(M, nf);
1271}
1272
1273// fold sqrt -> native_sqrt (x)
1274bool AMDGPULibCalls::fold_sqrt(CallInst *CI, IRBuilder<> &B,
1275 const FuncInfo &FInfo) {
1276 if (getArgType(FInfo) == AMDGPULibFunc::F32 && (getVecSize(FInfo) == 1) &&
1277 (FInfo.getPrefix() != AMDGPULibFunc::NATIVE)) {
1278 if (FunctionCallee FPExpr = getNativeFunction(
1279 CI->getModule(), AMDGPULibFunc(AMDGPULibFunc::EI_SQRT, FInfo))) {
1280 Value *opr0 = CI->getArgOperand(0);
1281 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << "sqrt(" << *opr0 <<
")\n"; } } while (false)
1282 << "sqrt(" << *opr0 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << "sqrt(" << *opr0 <<
")\n"; } } while (false)
;
1283 Value *nval = CreateCallEx(B,FPExpr, opr0, "__sqrt");
1284 replaceCall(nval);
1285 return true;
1286 }
1287 }
1288 return false;
1289}
1290
1291// fold sin, cos -> sincos.
1292bool AMDGPULibCalls::fold_sincos(CallInst *CI, IRBuilder<> &B,
1293 AliasAnalysis *AA) {
1294 AMDGPULibFunc fInfo;
1295 if (!AMDGPULibFunc::parse(CI->getCalledFunction()->getName(), fInfo))
1296 return false;
1297
1298 assert(fInfo.getId() == AMDGPULibFunc::EI_SIN ||((fInfo.getId() == AMDGPULibFunc::EI_SIN || fInfo.getId() == AMDGPULibFunc
::EI_COS) ? static_cast<void> (0) : __assert_fail ("fInfo.getId() == AMDGPULibFunc::EI_SIN || fInfo.getId() == AMDGPULibFunc::EI_COS"
, "/build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1299, __PRETTY_FUNCTION__))
1299 fInfo.getId() == AMDGPULibFunc::EI_COS)((fInfo.getId() == AMDGPULibFunc::EI_SIN || fInfo.getId() == AMDGPULibFunc
::EI_COS) ? static_cast<void> (0) : __assert_fail ("fInfo.getId() == AMDGPULibFunc::EI_SIN || fInfo.getId() == AMDGPULibFunc::EI_COS"
, "/build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1299, __PRETTY_FUNCTION__))
;
1300 bool const isSin = fInfo.getId() == AMDGPULibFunc::EI_SIN;
1301
1302 Value *CArgVal = CI->getArgOperand(0);
1303 BasicBlock * const CBB = CI->getParent();
1304
1305 int const MaxScan = 30;
1306
1307 { // fold in load value.
1308 LoadInst *LI = dyn_cast<LoadInst>(CArgVal);
1309 if (LI && LI->getParent() == CBB) {
1310 BasicBlock::iterator BBI = LI->getIterator();
1311 Value *AvailableVal = FindAvailableLoadedValue(LI, CBB, BBI, MaxScan, AA);
1312 if (AvailableVal) {
1313 CArgVal->replaceAllUsesWith(AvailableVal);
1314 if (CArgVal->getNumUses() == 0)
1315 LI->eraseFromParent();
1316 CArgVal = CI->getArgOperand(0);
1317 }
1318 }
1319 }
1320
1321 Module *M = CI->getModule();
1322 fInfo.setId(isSin ? AMDGPULibFunc::EI_COS : AMDGPULibFunc::EI_SIN);
1323 std::string const PairName = fInfo.mangle();
1324
1325 CallInst *UI = nullptr;
1326 for (User* U : CArgVal->users()) {
1327 CallInst *XI = dyn_cast_or_null<CallInst>(U);
1328 if (!XI || XI == CI || XI->getParent() != CBB)
1329 continue;
1330
1331 Function *UCallee = XI->getCalledFunction();
1332 if (!UCallee || !UCallee->getName().equals(PairName))
1333 continue;
1334
1335 BasicBlock::iterator BBI = CI->getIterator();
1336 if (BBI == CI->getParent()->begin())
1337 break;
1338 --BBI;
1339 for (int I = MaxScan; I > 0 && BBI != CBB->begin(); --BBI, --I) {
1340 if (cast<Instruction>(BBI) == XI) {
1341 UI = XI;
1342 break;
1343 }
1344 }
1345 if (UI) break;
1346 }
1347
1348 if (!UI) return false;
1349
1350 // Merge the sin and cos.
1351
1352 // for OpenCL 2.0 we have only generic implementation of sincos
1353 // function.
1354 AMDGPULibFunc nf(AMDGPULibFunc::EI_SINCOS, fInfo);
1355 nf.getLeads()[0].PtrKind = AMDGPULibFunc::getEPtrKindFromAddrSpace(AMDGPUAS::FLAT_ADDRESS);
1356 FunctionCallee Fsincos = getFunction(M, nf);
1357 if (!Fsincos) return false;
1358
1359 BasicBlock::iterator ItOld = B.GetInsertPoint();
1360 AllocaInst *Alloc = insertAlloca(UI, B, "__sincos_");
1361 B.SetInsertPoint(UI);
1362
1363 Value *P = Alloc;
1364 Type *PTy = Fsincos.getFunctionType()->getParamType(1);
1365 // The allocaInst allocates the memory in private address space. This need
1366 // to be bitcasted to point to the address space of cos pointer type.
1367 // In OpenCL 2.0 this is generic, while in 1.2 that is private.
1368 if (PTy->getPointerAddressSpace() != AMDGPUAS::PRIVATE_ADDRESS)
1369 P = B.CreateAddrSpaceCast(Alloc, PTy);
1370 CallInst *Call = CreateCallEx2(B, Fsincos, UI->getArgOperand(0), P);
1371
1372 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)
1373 << *Call << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: fold_sincos ("
<< *CI << ", " << *UI << ") with " <<
*Call << "\n"; } } while (false)
;
1374
1375 if (!isSin) { // CI->cos, UI->sin
1376 B.SetInsertPoint(&*ItOld);
1377 UI->replaceAllUsesWith(&*Call);
1378 Instruction *Reload = B.CreateLoad(Alloc->getAllocatedType(), Alloc);
1379 CI->replaceAllUsesWith(Reload);
1380 UI->eraseFromParent();
1381 CI->eraseFromParent();
1382 } else { // CI->sin, UI->cos
1383 Instruction *Reload = B.CreateLoad(Alloc->getAllocatedType(), Alloc);
1384 UI->replaceAllUsesWith(Reload);
1385 CI->replaceAllUsesWith(Call);
1386 UI->eraseFromParent();
1387 CI->eraseFromParent();
1388 }
1389 return true;
1390}
1391
1392bool AMDGPULibCalls::fold_wavefrontsize(CallInst *CI, IRBuilder<> &B) {
1393 if (!TM)
1394 return false;
1395
1396 StringRef CPU = TM->getTargetCPU();
1397 StringRef Features = TM->getTargetFeatureString();
1398 if ((CPU.empty() || CPU.equals_lower("generic")) &&
1399 (Features.empty() ||
1400 Features.find_lower("wavefrontsize") == StringRef::npos))
1401 return false;
1402
1403 Function *F = CI->getParent()->getParent();
1404 const GCNSubtarget &ST = TM->getSubtarget<GCNSubtarget>(*F);
1405 unsigned N = ST.getWavefrontSize();
1406
1407 LLVM_DEBUG(errs() << "AMDIC: fold_wavefrontsize (" << *CI << ") with "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: fold_wavefrontsize ("
<< *CI << ") with " << N << "\n"; } }
while (false)
1408 << N << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: fold_wavefrontsize ("
<< *CI << ") with " << N << "\n"; } }
while (false)
;
1409
1410 CI->replaceAllUsesWith(ConstantInt::get(B.getInt32Ty(), N));
1411 CI->eraseFromParent();
1412 return true;
1413}
1414
1415// Get insertion point at entry.
1416BasicBlock::iterator AMDGPULibCalls::getEntryIns(CallInst * UI) {
1417 Function * Func = UI->getParent()->getParent();
1418 BasicBlock * BB = &Func->getEntryBlock();
1419 assert(BB && "Entry block not found!")((BB && "Entry block not found!") ? static_cast<void
> (0) : __assert_fail ("BB && \"Entry block not found!\""
, "/build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1419, __PRETTY_FUNCTION__))
;
1420 BasicBlock::iterator ItNew = BB->begin();
1421 return ItNew;
1422}
1423
1424// Insert a AllocsInst at the beginning of function entry block.
1425AllocaInst* AMDGPULibCalls::insertAlloca(CallInst *UI, IRBuilder<> &B,
1426 const char *prefix) {
1427 BasicBlock::iterator ItNew = getEntryIns(UI);
1428 Function *UCallee = UI->getCalledFunction();
1429 Type *RetType = UCallee->getReturnType();
1430 B.SetInsertPoint(&*ItNew);
1431 AllocaInst *Alloc = B.CreateAlloca(RetType, 0,
1432 std::string(prefix) + UI->getName());
1433 Alloc->setAlignment(UCallee->getParent()->getDataLayout()
1434 .getTypeAllocSize(RetType));
1435 return Alloc;
1436}
1437
1438bool AMDGPULibCalls::evaluateScalarMathFunc(FuncInfo &FInfo,
1439 double& Res0, double& Res1,
1440 Constant *copr0, Constant *copr1,
1441 Constant *copr2) {
1442 // By default, opr0/opr1/opr3 holds values of float/double type.
1443 // If they are not float/double, each function has to its
1444 // operand separately.
1445 double opr0=0.0, opr1=0.0, opr2=0.0;
1446 ConstantFP *fpopr0 = dyn_cast_or_null<ConstantFP>(copr0);
1447 ConstantFP *fpopr1 = dyn_cast_or_null<ConstantFP>(copr1);
1448 ConstantFP *fpopr2 = dyn_cast_or_null<ConstantFP>(copr2);
1449 if (fpopr0) {
1450 opr0 = (getArgType(FInfo) == AMDGPULibFunc::F64)
1451 ? fpopr0->getValueAPF().convertToDouble()
1452 : (double)fpopr0->getValueAPF().convertToFloat();
1453 }
1454
1455 if (fpopr1) {
1456 opr1 = (getArgType(FInfo) == AMDGPULibFunc::F64)
1457 ? fpopr1->getValueAPF().convertToDouble()
1458 : (double)fpopr1->getValueAPF().convertToFloat();
1459 }
1460
1461 if (fpopr2) {
1462 opr2 = (getArgType(FInfo) == AMDGPULibFunc::F64)
1463 ? fpopr2->getValueAPF().convertToDouble()
1464 : (double)fpopr2->getValueAPF().convertToFloat();
1465 }
1466
1467 switch (FInfo.getId()) {
1468 default : return false;
1469
1470 case AMDGPULibFunc::EI_ACOS:
1471 Res0 = acos(opr0);
1472 return true;
1473
1474 case AMDGPULibFunc::EI_ACOSH:
1475 // acosh(x) == log(x + sqrt(x*x - 1))
1476 Res0 = log(opr0 + sqrt(opr0*opr0 - 1.0));
1477 return true;
1478
1479 case AMDGPULibFunc::EI_ACOSPI:
1480 Res0 = acos(opr0) / MATH_PI3.14159265358979323846264338327950288419716939937511;
1481 return true;
1482
1483 case AMDGPULibFunc::EI_ASIN:
1484 Res0 = asin(opr0);
1485 return true;
1486
1487 case AMDGPULibFunc::EI_ASINH:
1488 // asinh(x) == log(x + sqrt(x*x + 1))
1489 Res0 = log(opr0 + sqrt(opr0*opr0 + 1.0));
1490 return true;
1491
1492 case AMDGPULibFunc::EI_ASINPI:
1493 Res0 = asin(opr0) / MATH_PI3.14159265358979323846264338327950288419716939937511;
1494 return true;
1495
1496 case AMDGPULibFunc::EI_ATAN:
1497 Res0 = atan(opr0);
1498 return true;
1499
1500 case AMDGPULibFunc::EI_ATANH:
1501 // atanh(x) == (log(x+1) - log(x-1))/2;
1502 Res0 = (log(opr0 + 1.0) - log(opr0 - 1.0))/2.0;
1503 return true;
1504
1505 case AMDGPULibFunc::EI_ATANPI:
1506 Res0 = atan(opr0) / MATH_PI3.14159265358979323846264338327950288419716939937511;
1507 return true;
1508
1509 case AMDGPULibFunc::EI_CBRT:
1510 Res0 = (opr0 < 0.0) ? -pow(-opr0, 1.0/3.0) : pow(opr0, 1.0/3.0);
1511 return true;
1512
1513 case AMDGPULibFunc::EI_COS:
1514 Res0 = cos(opr0);
1515 return true;
1516
1517 case AMDGPULibFunc::EI_COSH:
1518 Res0 = cosh(opr0);
1519 return true;
1520
1521 case AMDGPULibFunc::EI_COSPI:
1522 Res0 = cos(MATH_PI3.14159265358979323846264338327950288419716939937511 * opr0);
1523 return true;
1524
1525 case AMDGPULibFunc::EI_EXP:
1526 Res0 = exp(opr0);
1527 return true;
1528
1529 case AMDGPULibFunc::EI_EXP2:
1530 Res0 = pow(2.0, opr0);
1531 return true;
1532
1533 case AMDGPULibFunc::EI_EXP10:
1534 Res0 = pow(10.0, opr0);
1535 return true;
1536
1537 case AMDGPULibFunc::EI_EXPM1:
1538 Res0 = exp(opr0) - 1.0;
1539 return true;
1540
1541 case AMDGPULibFunc::EI_LOG:
1542 Res0 = log(opr0);
1543 return true;
1544
1545 case AMDGPULibFunc::EI_LOG2:
1546 Res0 = log(opr0) / log(2.0);
1547 return true;
1548
1549 case AMDGPULibFunc::EI_LOG10:
1550 Res0 = log(opr0) / log(10.0);
1551 return true;
1552
1553 case AMDGPULibFunc::EI_RSQRT:
1554 Res0 = 1.0 / sqrt(opr0);
1555 return true;
1556
1557 case AMDGPULibFunc::EI_SIN:
1558 Res0 = sin(opr0);
1559 return true;
1560
1561 case AMDGPULibFunc::EI_SINH:
1562 Res0 = sinh(opr0);
1563 return true;
1564
1565 case AMDGPULibFunc::EI_SINPI:
1566 Res0 = sin(MATH_PI3.14159265358979323846264338327950288419716939937511 * opr0);
1567 return true;
1568
1569 case AMDGPULibFunc::EI_SQRT:
1570 Res0 = sqrt(opr0);
1571 return true;
1572
1573 case AMDGPULibFunc::EI_TAN:
1574 Res0 = tan(opr0);
1575 return true;
1576
1577 case AMDGPULibFunc::EI_TANH:
1578 Res0 = tanh(opr0);
1579 return true;
1580
1581 case AMDGPULibFunc::EI_TANPI:
1582 Res0 = tan(MATH_PI3.14159265358979323846264338327950288419716939937511 * opr0);
1583 return true;
1584
1585 case AMDGPULibFunc::EI_RECIP:
1586 Res0 = 1.0 / opr0;
1587 return true;
1588
1589 // two-arg functions
1590 case AMDGPULibFunc::EI_DIVIDE:
1591 Res0 = opr0 / opr1;
1592 return true;
1593
1594 case AMDGPULibFunc::EI_POW:
1595 case AMDGPULibFunc::EI_POWR:
1596 Res0 = pow(opr0, opr1);
1597 return true;
1598
1599 case AMDGPULibFunc::EI_POWN: {
1600 if (ConstantInt *iopr1 = dyn_cast_or_null<ConstantInt>(copr1)) {
1601 double val = (double)iopr1->getSExtValue();
1602 Res0 = pow(opr0, val);
1603 return true;
1604 }
1605 return false;
1606 }
1607
1608 case AMDGPULibFunc::EI_ROOTN: {
1609 if (ConstantInt *iopr1 = dyn_cast_or_null<ConstantInt>(copr1)) {
1610 double val = (double)iopr1->getSExtValue();
1611 Res0 = pow(opr0, 1.0 / val);
1612 return true;
1613 }
1614 return false;
1615 }
1616
1617 // with ptr arg
1618 case AMDGPULibFunc::EI_SINCOS:
1619 Res0 = sin(opr0);
1620 Res1 = cos(opr0);
1621 return true;
1622
1623 // three-arg functions
1624 case AMDGPULibFunc::EI_FMA:
1625 case AMDGPULibFunc::EI_MAD:
1626 Res0 = opr0 * opr1 + opr2;
1627 return true;
1628 }
1629
1630 return false;
1631}
1632
1633bool AMDGPULibCalls::evaluateCall(CallInst *aCI, FuncInfo &FInfo) {
1634 int numArgs = (int)aCI->getNumArgOperands();
1635 if (numArgs > 3)
26
Assuming 'numArgs' is <= 3
27
Taking false branch
1636 return false;
1637
1638 Constant *copr0 = nullptr;
1639 Constant *copr1 = nullptr;
1640 Constant *copr2 = nullptr;
1641 if (numArgs > 0) {
28
Assuming 'numArgs' is <= 0
29
Taking false branch
1642 if ((copr0 = dyn_cast<Constant>(aCI->getArgOperand(0))) == nullptr)
1643 return false;
1644 }
1645
1646 if (numArgs
29.1
'numArgs' is <= 1
> 1) {
30
Taking false branch
1647 if ((copr1 = dyn_cast<Constant>(aCI->getArgOperand(1))) == nullptr) {
1648 if (FInfo.getId() != AMDGPULibFunc::EI_SINCOS)
1649 return false;
1650 }
1651 }
1652
1653 if (numArgs
30.1
'numArgs' is <= 2
> 2) {
31
Taking false branch
1654 if ((copr2 = dyn_cast<Constant>(aCI->getArgOperand(2))) == nullptr)
1655 return false;
1656 }
1657
1658 // At this point, all arguments to aCI are constants.
1659
1660 // max vector size is 16, and sincos will generate two results.
1661 double DVal0[16], DVal1[16];
1662 bool hasTwoResults = (FInfo.getId() == AMDGPULibFunc::EI_SINCOS);
32
Assuming the condition is false
1663 if (getVecSize(FInfo) == 1) {
33
Assuming the condition is false
34
Taking false branch
1664 if (!evaluateScalarMathFunc(FInfo, DVal0[0],
1665 DVal1[0], copr0, copr1, copr2)) {
1666 return false;
1667 }
1668 } else {
1669 ConstantDataVector *CDV0 = dyn_cast_or_null<ConstantDataVector>(copr0);
35
Assuming null pointer is passed into cast
1670 ConstantDataVector *CDV1 = dyn_cast_or_null<ConstantDataVector>(copr1);
36
Assuming null pointer is passed into cast
1671 ConstantDataVector *CDV2 = dyn_cast_or_null<ConstantDataVector>(copr2);
37
Assuming null pointer is passed into cast
1672 for (int i=0; i < getVecSize(FInfo); ++i) {
38
Assuming the condition is false
39
Loop condition is false. Execution continues on line 1683
1673 Constant *celt0 = CDV0 ? CDV0->getElementAsConstant(i) : nullptr;
1674 Constant *celt1 = CDV1 ? CDV1->getElementAsConstant(i) : nullptr;
1675 Constant *celt2 = CDV2 ? CDV2->getElementAsConstant(i) : nullptr;
1676 if (!evaluateScalarMathFunc(FInfo, DVal0[i],
1677 DVal1[i], celt0, celt1, celt2)) {
1678 return false;
1679 }
1680 }
1681 }
1682
1683 LLVMContext &context = CI->getParent()->getParent()->getContext();
1684 Constant *nval0, *nval1;
1685 if (getVecSize(FInfo) == 1) {
40
Assuming the condition is true
41
Taking true branch
1686 nval0 = ConstantFP::get(CI->getType(), DVal0[0]);
42
2nd function call argument is an uninitialized value
1687 if (hasTwoResults)
1688 nval1 = ConstantFP::get(CI->getType(), DVal1[0]);
1689 } else {
1690 if (getArgType(FInfo) == AMDGPULibFunc::F32) {
1691 SmallVector <float, 0> FVal0, FVal1;
1692 for (int i=0; i < getVecSize(FInfo); ++i)
1693 FVal0.push_back((float)DVal0[i]);
1694 ArrayRef<float> tmp0(FVal0);
1695 nval0 = ConstantDataVector::get(context, tmp0);
1696 if (hasTwoResults) {
1697 for (int i=0; i < getVecSize(FInfo); ++i)
1698 FVal1.push_back((float)DVal1[i]);
1699 ArrayRef<float> tmp1(FVal1);
1700 nval1 = ConstantDataVector::get(context, tmp1);
1701 }
1702 } else {
1703 ArrayRef<double> tmp0(DVal0);
1704 nval0 = ConstantDataVector::get(context, tmp0);
1705 if (hasTwoResults) {
1706 ArrayRef<double> tmp1(DVal1);
1707 nval1 = ConstantDataVector::get(context, tmp1);
1708 }
1709 }
1710 }
1711
1712 if (hasTwoResults) {
1713 // sincos
1714 assert(FInfo.getId() == AMDGPULibFunc::EI_SINCOS &&((FInfo.getId() == AMDGPULibFunc::EI_SINCOS && "math function with ptr arg not supported yet"
) ? static_cast<void> (0) : __assert_fail ("FInfo.getId() == AMDGPULibFunc::EI_SINCOS && \"math function with ptr arg not supported yet\""
, "/build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1715, __PRETTY_FUNCTION__))
1715 "math function with ptr arg not supported yet")((FInfo.getId() == AMDGPULibFunc::EI_SINCOS && "math function with ptr arg not supported yet"
) ? static_cast<void> (0) : __assert_fail ("FInfo.getId() == AMDGPULibFunc::EI_SINCOS && \"math function with ptr arg not supported yet\""
, "/build/llvm-toolchain-snapshot-10~svn372204/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1715, __PRETTY_FUNCTION__))
;
1716 new StoreInst(nval1, aCI->getArgOperand(1), aCI);
1717 }
1718
1719 replaceCall(nval0);
1720 return true;
1721}
1722
1723// Public interface to the Simplify LibCalls pass.
1724FunctionPass *llvm::createAMDGPUSimplifyLibCallsPass(const TargetOptions &Opt,
1725 const TargetMachine *TM) {
1726 return new AMDGPUSimplifyLibCalls(Opt, TM);
1727}
1728
1729FunctionPass *llvm::createAMDGPUUseNativeCallsPass() {
1730 return new AMDGPUUseNativeCalls();
1731}
1732
1733static bool setFastFlags(Function &F, const TargetOptions &Options) {
1734 AttrBuilder B;
1735
1736 if (Options.UnsafeFPMath || Options.NoInfsFPMath)
1737 B.addAttribute("no-infs-fp-math", "true");
1738 if (Options.UnsafeFPMath || Options.NoNaNsFPMath)
1739 B.addAttribute("no-nans-fp-math", "true");
1740 if (Options.UnsafeFPMath) {
1741 B.addAttribute("less-precise-fpmad", "true");
1742 B.addAttribute("unsafe-fp-math", "true");
1743 }
1744
1745 if (!B.hasAttributes())
1746 return false;
1747
1748 F.addAttributes(AttributeList::FunctionIndex, B);
1749
1750 return true;
1751}
1752
1753bool AMDGPUSimplifyLibCalls::runOnFunction(Function &F) {
1754 if (skipFunction(F))
1
Assuming the condition is false
2
Taking false branch
1755 return false;
1756
1757 bool Changed = false;
1758 auto AA = &getAnalysis<AAResultsWrapperPass>().getAAResults();
1759
1760 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)
3
Assuming 'DebugFlag' is false
4
Loop condition is false. Exiting loop
1761 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)
;
1762
1763 if (!EnablePreLink)
5
Assuming the condition is false
6
Taking false branch
1764 Changed |= setFastFlags(F, Options);
1765
1766 for (auto &BB : F) {
1767 for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ) {
7
Loop condition is true. Entering loop body
1768 // Ignore non-calls.
1769 CallInst *CI = dyn_cast<CallInst>(I);
1770 ++I;
1771 if (!CI) continue;
8
Assuming 'CI' is non-null
9
Taking false branch
1772
1773 // Ignore indirect calls.
1774 Function *Callee = CI->getCalledFunction();
1775 if (Callee
9.1
'Callee' is not equal to null
== 0) continue;
10
Taking false branch
1776
1777 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
)
11
Assuming 'DebugFlag' is false
12
Loop condition is false. Exiting loop
1778 dbgs().flush())do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { dbgs() << "AMDIC: try folding "
<< *CI << "\n"; dbgs().flush(); } } while (false
)
;
1779 if(Simplifier.fold(CI, AA))
13
Calling 'AMDGPULibCalls::fold'
1780 Changed = true;
1781 }
1782 }
1783 return Changed;
1784}
1785
1786bool AMDGPUUseNativeCalls::runOnFunction(Function &F) {
1787 if (skipFunction(F) || UseNative.empty())
1788 return false;
1789
1790 bool Changed = false;
1791 for (auto &BB : F) {
1792 for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ) {
1793 // Ignore non-calls.
1794 CallInst *CI = dyn_cast<CallInst>(I);
1795 ++I;
1796 if (!CI) continue;
1797
1798 // Ignore indirect calls.
1799 Function *Callee = CI->getCalledFunction();
1800 if (Callee == 0) continue;
1801
1802 if(Simplifier.useNative(CI))
1803 Changed = true;
1804 }
1805 }
1806 return Changed;
1807}