Bug Summary

File:lib/Target/AMDGPU/AMDGPULibCalls.cpp
Warning:line 1645, 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 -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-9/lib/clang/9.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-9~svn358520/build-llvm/lib/Target/AMDGPU -I /build/llvm-toolchain-snapshot-9~svn358520/lib/Target/AMDGPU -I /build/llvm-toolchain-snapshot-9~svn358520/build-llvm/include -I /build/llvm-toolchain-snapshot-9~svn358520/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/include/clang/9.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-9/lib/clang/9.0.0/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++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-9~svn358520/build-llvm/lib/Target/AMDGPU -fdebug-prefix-map=/build/llvm-toolchain-snapshot-9~svn358520=. -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 -o /tmp/scan-build-2019-04-17-050842-1547-1 -x c++ /build/llvm-toolchain-snapshot-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp -faddrsig
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 "llvm/Analysis/AliasAnalysis.h"
19#include "llvm/Analysis/Loads.h"
20#include "llvm/ADT/StringSet.h"
21#include "llvm/ADT/StringRef.h"
22#include "llvm/IR/Constants.h"
23#include "llvm/IR/DerivedTypes.h"
24#include "llvm/IR/Instructions.h"
25#include "llvm/IR/IRBuilder.h"
26#include "llvm/IR/Function.h"
27#include "llvm/IR/LLVMContext.h"
28#include "llvm/IR/Module.h"
29#include "llvm/IR/ValueSymbolTable.h"
30#include "llvm/Support/Debug.h"
31#include "llvm/Support/raw_ostream.h"
32#include "llvm/Target/TargetOptions.h"
33#include <vector>
34#include <cmath>
35
36using namespace llvm;
37
38static cl::opt<bool> EnablePreLink("amdgpu-prelink",
39 cl::desc("Enable pre-link mode optimizations"),
40 cl::init(false),
41 cl::Hidden);
42
43static cl::list<std::string> UseNative("amdgpu-use-native",
44 cl::desc("Comma separated list of functions to replace with native, or all"),
45 cl::CommaSeparated, cl::ValueOptional,
46 cl::Hidden);
47
48#define MATH_PI3.14159265358979323846264338327950288419716939937511 3.14159265358979323846264338327950288419716939937511
49#define MATH_E2.71828182845904523536028747135266249775724709369996 2.71828182845904523536028747135266249775724709369996
50#define MATH_SQRT21.41421356237309504880168872420969807856967187537695 1.41421356237309504880168872420969807856967187537695
51
52#define MATH_LOG2E1.4426950408889634073599246810018921374266459541529859 1.4426950408889634073599246810018921374266459541529859
53#define MATH_LOG10E0.4342944819032518276511289189166050822943970058036665 0.4342944819032518276511289189166050822943970058036665
54// Value of log2(10)
55#define MATH_LOG2_103.3219280948873623478703194294893901758648313930245806 3.3219280948873623478703194294893901758648313930245806
56// Value of 1 / log2(10)
57#define MATH_RLOG2_100.3010299956639811952137388947244930267681898814621085 0.3010299956639811952137388947244930267681898814621085
58// Value of 1 / M_LOG2E_F = 1 / log2(e)
59#define MATH_RLOG2_E0.6931471805599453094172321214581765680755001343602552 0.6931471805599453094172321214581765680755001343602552
60
61namespace llvm {
62
63class AMDGPULibCalls {
64private:
65
66 typedef llvm::AMDGPULibFunc FuncInfo;
67
68 // -fuse-native.
69 bool AllNative = false;
70
71 bool useNativeFunc(const StringRef F) const;
72
73 // Return a pointer (pointer expr) to the function if function defintion with
74 // "FuncName" exists. It may create a new function prototype in pre-link mode.
75 FunctionCallee getFunction(Module *M, const FuncInfo &fInfo);
76
77 // Replace a normal function with its native version.
78 bool replaceWithNative(CallInst *CI, const FuncInfo &FInfo);
79
80 bool parseFunctionName(const StringRef& FMangledName,
81 FuncInfo *FInfo=nullptr /*out*/);
82
83 bool TDOFold(CallInst *CI, const FuncInfo &FInfo);
84
85 /* Specialized optimizations */
86
87 // recip (half or native)
88 bool fold_recip(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
89
90 // divide (half or native)
91 bool fold_divide(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
92
93 // pow/powr/pown
94 bool fold_pow(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
95
96 // rootn
97 bool fold_rootn(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
98
99 // fma/mad
100 bool fold_fma_mad(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
101
102 // -fuse-native for sincos
103 bool sincosUseNative(CallInst *aCI, const FuncInfo &FInfo);
104
105 // evaluate calls if calls' arguments are constants.
106 bool evaluateScalarMathFunc(FuncInfo &FInfo, double& Res0,
107 double& Res1, Constant *copr0, Constant *copr1, Constant *copr2);
108 bool evaluateCall(CallInst *aCI, FuncInfo &FInfo);
109
110 // exp
111 bool fold_exp(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
112
113 // exp2
114 bool fold_exp2(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
115
116 // exp10
117 bool fold_exp10(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
118
119 // log
120 bool fold_log(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
121
122 // log2
123 bool fold_log2(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
124
125 // log10
126 bool fold_log10(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
127
128 // sqrt
129 bool fold_sqrt(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
130
131 // sin/cos
132 bool fold_sincos(CallInst * CI, IRBuilder<> &B, AliasAnalysis * AA);
133
134 // __read_pipe/__write_pipe
135 bool fold_read_write_pipe(CallInst *CI, IRBuilder<> &B, FuncInfo &FInfo);
136
137 // Get insertion point at entry.
138 BasicBlock::iterator getEntryIns(CallInst * UI);
139 // Insert an Alloc instruction.
140 AllocaInst* insertAlloca(CallInst * UI, IRBuilder<> &B, const char *prefix);
141 // Get a scalar native builtin signle argument FP function
142 FunctionCallee getNativeFunction(Module *M, const FuncInfo &FInfo);
143
144protected:
145 CallInst *CI;
146
147 bool isUnsafeMath(const CallInst *CI) const;
148
149 void replaceCall(Value *With) {
150 CI->replaceAllUsesWith(With);
151 CI->eraseFromParent();
152 }
153
154public:
155 bool fold(CallInst *CI, AliasAnalysis *AA = nullptr);
156
157 void initNativeFuncs();
158
159 // Replace a normal math function call with that native version
160 bool useNative(CallInst *CI);
161};
162
163} // end llvm namespace
164
165namespace {
166
167 class AMDGPUSimplifyLibCalls : public FunctionPass {
168
169 AMDGPULibCalls Simplifier;
170
171 const TargetOptions Options;
172
173 public:
174 static char ID; // Pass identification
175
176 AMDGPUSimplifyLibCalls(const TargetOptions &Opt = TargetOptions())
177 : FunctionPass(ID), Options(Opt) {
178 initializeAMDGPUSimplifyLibCallsPass(*PassRegistry::getPassRegistry());
179 }
180
181 void getAnalysisUsage(AnalysisUsage &AU) const override {
182 AU.addRequired<AAResultsWrapperPass>();
183 }
184
185 bool runOnFunction(Function &M) override;
186 };
187
188 class AMDGPUUseNativeCalls : public FunctionPass {
189
190 AMDGPULibCalls Simplifier;
191
192 public:
193 static char ID; // Pass identification
194
195 AMDGPUUseNativeCalls() : FunctionPass(ID) {
196 initializeAMDGPUUseNativeCallsPass(*PassRegistry::getPassRegistry());
197 Simplifier.initNativeFuncs();
198 }
199
200 bool runOnFunction(Function &F) override;
201 };
202
203} // end anonymous namespace.
204
205char AMDGPUSimplifyLibCalls::ID = 0;
206char AMDGPUUseNativeCalls::ID = 0;
207
208INITIALIZE_PASS_BEGIN(AMDGPUSimplifyLibCalls, "amdgpu-simplifylib",static void *initializeAMDGPUSimplifyLibCallsPassOnce(PassRegistry
&Registry) {
209 "Simplify well-known AMD library calls", false, false)static void *initializeAMDGPUSimplifyLibCallsPassOnce(PassRegistry
&Registry) {
210INITIALIZE_PASS_DEPENDENCY(AAResultsWrapperPass)initializeAAResultsWrapperPassPass(Registry);
211INITIALIZE_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
)); }
212 "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
)); }
213
214INITIALIZE_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)); }
215 "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)); }
216 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)); }
217
218template <typename IRB>
219static CallInst *CreateCallEx(IRB &B, FunctionCallee Callee, Value *Arg,
220 const Twine &Name = "") {
221 CallInst *R = B.CreateCall(Callee, Arg, Name);
222 if (Function *F = dyn_cast<Function>(Callee.getCallee()))
223 R->setCallingConv(F->getCallingConv());
224 return R;
225}
226
227template <typename IRB>
228static CallInst *CreateCallEx2(IRB &B, FunctionCallee Callee, Value *Arg1,
229 Value *Arg2, const Twine &Name = "") {
230 CallInst *R = B.CreateCall(Callee, {Arg1, Arg2}, Name);
231 if (Function *F = dyn_cast<Function>(Callee.getCallee()))
232 R->setCallingConv(F->getCallingConv());
233 return R;
234}
235
236// Data structures for table-driven optimizations.
237// FuncTbl works for both f32 and f64 functions with 1 input argument
238
239struct TableEntry {
240 double result;
241 double input;
242};
243
244/* a list of {result, input} */
245static const TableEntry tbl_acos[] = {
246 {MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, 0.0},
247 {MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, -0.0},
248 {0.0, 1.0},
249 {MATH_PI3.14159265358979323846264338327950288419716939937511, -1.0}
250};
251static const TableEntry tbl_acosh[] = {
252 {0.0, 1.0}
253};
254static const TableEntry tbl_acospi[] = {
255 {0.5, 0.0},
256 {0.5, -0.0},
257 {0.0, 1.0},
258 {1.0, -1.0}
259};
260static const TableEntry tbl_asin[] = {
261 {0.0, 0.0},
262 {-0.0, -0.0},
263 {MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, 1.0},
264 {-MATH_PI3.14159265358979323846264338327950288419716939937511/2.0, -1.0}
265};
266static const TableEntry tbl_asinh[] = {
267 {0.0, 0.0},
268 {-0.0, -0.0}
269};
270static const TableEntry tbl_asinpi[] = {
271 {0.0, 0.0},
272 {-0.0, -0.0},
273 {0.5, 1.0},
274 {-0.5, -1.0}
275};
276static const TableEntry tbl_atan[] = {
277 {0.0, 0.0},
278 {-0.0, -0.0},
279 {MATH_PI3.14159265358979323846264338327950288419716939937511/4.0, 1.0},
280 {-MATH_PI3.14159265358979323846264338327950288419716939937511/4.0, -1.0}
281};
282static const TableEntry tbl_atanh[] = {
283 {0.0, 0.0},
284 {-0.0, -0.0}
285};
286static const TableEntry tbl_atanpi[] = {
287 {0.0, 0.0},
288 {-0.0, -0.0},
289 {0.25, 1.0},
290 {-0.25, -1.0}
291};
292static const TableEntry tbl_cbrt[] = {
293 {0.0, 0.0},
294 {-0.0, -0.0},
295 {1.0, 1.0},
296 {-1.0, -1.0},
297};
298static const TableEntry tbl_cos[] = {
299 {1.0, 0.0},
300 {1.0, -0.0}
301};
302static const TableEntry tbl_cosh[] = {
303 {1.0, 0.0},
304 {1.0, -0.0}
305};
306static const TableEntry tbl_cospi[] = {
307 {1.0, 0.0},
308 {1.0, -0.0}
309};
310static const TableEntry tbl_erfc[] = {
311 {1.0, 0.0},
312 {1.0, -0.0}
313};
314static const TableEntry tbl_erf[] = {
315 {0.0, 0.0},
316 {-0.0, -0.0}
317};
318static const TableEntry tbl_exp[] = {
319 {1.0, 0.0},
320 {1.0, -0.0},
321 {MATH_E2.71828182845904523536028747135266249775724709369996, 1.0}
322};
323static const TableEntry tbl_exp2[] = {
324 {1.0, 0.0},
325 {1.0, -0.0},
326 {2.0, 1.0}
327};
328static const TableEntry tbl_exp10[] = {
329 {1.0, 0.0},
330 {1.0, -0.0},
331 {10.0, 1.0}
332};
333static const TableEntry tbl_expm1[] = {
334 {0.0, 0.0},
335 {-0.0, -0.0}
336};
337static const TableEntry tbl_log[] = {
338 {0.0, 1.0},
339 {1.0, MATH_E2.71828182845904523536028747135266249775724709369996}
340};
341static const TableEntry tbl_log2[] = {
342 {0.0, 1.0},
343 {1.0, 2.0}
344};
345static const TableEntry tbl_log10[] = {
346 {0.0, 1.0},
347 {1.0, 10.0}
348};
349static const TableEntry tbl_rsqrt[] = {
350 {1.0, 1.0},
351 {1.0/MATH_SQRT21.41421356237309504880168872420969807856967187537695, 2.0}
352};
353static const TableEntry tbl_sin[] = {
354 {0.0, 0.0},
355 {-0.0, -0.0}
356};
357static const TableEntry tbl_sinh[] = {
358 {0.0, 0.0},
359 {-0.0, -0.0}
360};
361static const TableEntry tbl_sinpi[] = {
362 {0.0, 0.0},
363 {-0.0, -0.0}
364};
365static const TableEntry tbl_sqrt[] = {
366 {0.0, 0.0},
367 {1.0, 1.0},
368 {MATH_SQRT21.41421356237309504880168872420969807856967187537695, 2.0}
369};
370static const TableEntry tbl_tan[] = {
371 {0.0, 0.0},
372 {-0.0, -0.0}
373};
374static const TableEntry tbl_tanh[] = {
375 {0.0, 0.0},
376 {-0.0, -0.0}
377};
378static const TableEntry tbl_tanpi[] = {
379 {0.0, 0.0},
380 {-0.0, -0.0}
381};
382static const TableEntry tbl_tgamma[] = {
383 {1.0, 1.0},
384 {1.0, 2.0},
385 {2.0, 3.0},
386 {6.0, 4.0}
387};
388
389static bool HasNative(AMDGPULibFunc::EFuncId id) {
390 switch(id) {
391 case AMDGPULibFunc::EI_DIVIDE:
392 case AMDGPULibFunc::EI_COS:
393 case AMDGPULibFunc::EI_EXP:
394 case AMDGPULibFunc::EI_EXP2:
395 case AMDGPULibFunc::EI_EXP10:
396 case AMDGPULibFunc::EI_LOG:
397 case AMDGPULibFunc::EI_LOG2:
398 case AMDGPULibFunc::EI_LOG10:
399 case AMDGPULibFunc::EI_POWR:
400 case AMDGPULibFunc::EI_RECIP:
401 case AMDGPULibFunc::EI_RSQRT:
402 case AMDGPULibFunc::EI_SIN:
403 case AMDGPULibFunc::EI_SINCOS:
404 case AMDGPULibFunc::EI_SQRT:
405 case AMDGPULibFunc::EI_TAN:
406 return true;
407 default:;
408 }
409 return false;
410}
411
412struct TableRef {
413 size_t size;
414 const TableEntry *table; // variable size: from 0 to (size - 1)
415
416 TableRef() : size(0), table(nullptr) {}
417
418 template <size_t N>
419 TableRef(const TableEntry (&tbl)[N]) : size(N), table(&tbl[0]) {}
420};
421
422static TableRef getOptTable(AMDGPULibFunc::EFuncId id) {
423 switch(id) {
424 case AMDGPULibFunc::EI_ACOS: return TableRef(tbl_acos);
425 case AMDGPULibFunc::EI_ACOSH: return TableRef(tbl_acosh);
426 case AMDGPULibFunc::EI_ACOSPI: return TableRef(tbl_acospi);
427 case AMDGPULibFunc::EI_ASIN: return TableRef(tbl_asin);
428 case AMDGPULibFunc::EI_ASINH: return TableRef(tbl_asinh);
429 case AMDGPULibFunc::EI_ASINPI: return TableRef(tbl_asinpi);
430 case AMDGPULibFunc::EI_ATAN: return TableRef(tbl_atan);
431 case AMDGPULibFunc::EI_ATANH: return TableRef(tbl_atanh);
432 case AMDGPULibFunc::EI_ATANPI: return TableRef(tbl_atanpi);
433 case AMDGPULibFunc::EI_CBRT: return TableRef(tbl_cbrt);
434 case AMDGPULibFunc::EI_NCOS:
435 case AMDGPULibFunc::EI_COS: return TableRef(tbl_cos);
436 case AMDGPULibFunc::EI_COSH: return TableRef(tbl_cosh);
437 case AMDGPULibFunc::EI_COSPI: return TableRef(tbl_cospi);
438 case AMDGPULibFunc::EI_ERFC: return TableRef(tbl_erfc);
439 case AMDGPULibFunc::EI_ERF: return TableRef(tbl_erf);
440 case AMDGPULibFunc::EI_EXP: return TableRef(tbl_exp);
441 case AMDGPULibFunc::EI_NEXP2:
442 case AMDGPULibFunc::EI_EXP2: return TableRef(tbl_exp2);
443 case AMDGPULibFunc::EI_EXP10: return TableRef(tbl_exp10);
444 case AMDGPULibFunc::EI_EXPM1: return TableRef(tbl_expm1);
445 case AMDGPULibFunc::EI_LOG: return TableRef(tbl_log);
446 case AMDGPULibFunc::EI_NLOG2:
447 case AMDGPULibFunc::EI_LOG2: return TableRef(tbl_log2);
448 case AMDGPULibFunc::EI_LOG10: return TableRef(tbl_log10);
449 case AMDGPULibFunc::EI_NRSQRT:
450 case AMDGPULibFunc::EI_RSQRT: return TableRef(tbl_rsqrt);
451 case AMDGPULibFunc::EI_NSIN:
452 case AMDGPULibFunc::EI_SIN: return TableRef(tbl_sin);
453 case AMDGPULibFunc::EI_SINH: return TableRef(tbl_sinh);
454 case AMDGPULibFunc::EI_SINPI: return TableRef(tbl_sinpi);
455 case AMDGPULibFunc::EI_NSQRT:
456 case AMDGPULibFunc::EI_SQRT: return TableRef(tbl_sqrt);
457 case AMDGPULibFunc::EI_TAN: return TableRef(tbl_tan);
458 case AMDGPULibFunc::EI_TANH: return TableRef(tbl_tanh);
459 case AMDGPULibFunc::EI_TANPI: return TableRef(tbl_tanpi);
460 case AMDGPULibFunc::EI_TGAMMA: return TableRef(tbl_tgamma);
461 default:;
462 }
463 return TableRef();
464}
465
466static inline int getVecSize(const AMDGPULibFunc& FInfo) {
467 return FInfo.getLeads()[0].VectorSize;
468}
469
470static inline AMDGPULibFunc::EType getArgType(const AMDGPULibFunc& FInfo) {
471 return (AMDGPULibFunc::EType)FInfo.getLeads()[0].ArgType;
472}
473
474FunctionCallee AMDGPULibCalls::getFunction(Module *M, const FuncInfo &fInfo) {
475 // If we are doing PreLinkOpt, the function is external. So it is safe to
476 // use getOrInsertFunction() at this stage.
477
478 return EnablePreLink ? AMDGPULibFunc::getOrInsertFunction(M, fInfo)
479 : AMDGPULibFunc::getFunction(M, fInfo);
480}
481
482bool AMDGPULibCalls::parseFunctionName(const StringRef& FMangledName,
483 FuncInfo *FInfo) {
484 return AMDGPULibFunc::parse(FMangledName, *FInfo);
485}
486
487bool AMDGPULibCalls::isUnsafeMath(const CallInst *CI) const {
488 if (auto Op = dyn_cast<FPMathOperator>(CI))
489 if (Op->isFast())
490 return true;
491 const Function *F = CI->getParent()->getParent();
492 Attribute Attr = F->getFnAttribute("unsafe-fp-math");
493 return Attr.getValueAsString() == "true";
494}
495
496bool AMDGPULibCalls::useNativeFunc(const StringRef F) const {
497 return AllNative ||
498 std::find(UseNative.begin(), UseNative.end(), F) != UseNative.end();
499}
500
501void AMDGPULibCalls::initNativeFuncs() {
502 AllNative = useNativeFunc("all") ||
503 (UseNative.getNumOccurrences() && UseNative.size() == 1 &&
504 UseNative.begin()->empty());
505}
506
507bool AMDGPULibCalls::sincosUseNative(CallInst *aCI, const FuncInfo &FInfo) {
508 bool native_sin = useNativeFunc("sin");
509 bool native_cos = useNativeFunc("cos");
510
511 if (native_sin && native_cos) {
512 Module *M = aCI->getModule();
513 Value *opr0 = aCI->getArgOperand(0);
514
515 AMDGPULibFunc nf;
516 nf.getLeads()[0].ArgType = FInfo.getLeads()[0].ArgType;
517 nf.getLeads()[0].VectorSize = FInfo.getLeads()[0].VectorSize;
518
519 nf.setPrefix(AMDGPULibFunc::NATIVE);
520 nf.setId(AMDGPULibFunc::EI_SIN);
521 FunctionCallee sinExpr = getFunction(M, nf);
522
523 nf.setPrefix(AMDGPULibFunc::NATIVE);
524 nf.setId(AMDGPULibFunc::EI_COS);
525 FunctionCallee cosExpr = getFunction(M, nf);
526 if (sinExpr && cosExpr) {
527 Value *sinval = CallInst::Create(sinExpr, opr0, "splitsin", aCI);
528 Value *cosval = CallInst::Create(cosExpr, opr0, "splitcos", aCI);
529 new StoreInst(cosval, aCI->getArgOperand(1), aCI);
530
531 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)
532 << " 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)
;
533
534 replaceCall(sinval);
535 return true;
536 }
537 }
538 return false;
539}
540
541bool AMDGPULibCalls::useNative(CallInst *aCI) {
542 CI = aCI;
543 Function *Callee = aCI->getCalledFunction();
544
545 FuncInfo FInfo;
546 if (!parseFunctionName(Callee->getName(), &FInfo) || !FInfo.isMangled() ||
547 FInfo.getPrefix() != AMDGPULibFunc::NOPFX ||
548 getArgType(FInfo) == AMDGPULibFunc::F64 || !HasNative(FInfo.getId()) ||
549 !(AllNative || useNativeFunc(FInfo.getName()))) {
550 return false;
551 }
552
553 if (FInfo.getId() == AMDGPULibFunc::EI_SINCOS)
554 return sincosUseNative(aCI, FInfo);
555
556 FInfo.setPrefix(AMDGPULibFunc::NATIVE);
557 FunctionCallee F = getFunction(aCI->getModule(), FInfo);
558 if (!F)
559 return false;
560
561 aCI->setCalledFunction(F);
562 DEBUG_WITH_TYPE("usenative", dbgs() << "<useNative> replace " << *aCIdo { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("usenative")) { dbgs() << "<useNative> replace "
<< *aCI << " with native version"; } } while (false
)
563 << " with native version")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("usenative")) { dbgs() << "<useNative> replace "
<< *aCI << " with native version"; } } while (false
)
;
564 return true;
565}
566
567// Clang emits call of __read_pipe_2 or __read_pipe_4 for OpenCL read_pipe
568// builtin, with appended type size and alignment arguments, where 2 or 4
569// indicates the original number of arguments. The library has optimized version
570// of __read_pipe_2/__read_pipe_4 when the type size and alignment has the same
571// power of 2 value. This function transforms __read_pipe_2 to __read_pipe_2_N
572// for such cases where N is the size in bytes of the type (N = 1, 2, 4, 8, ...,
573// 128). The same for __read_pipe_4, write_pipe_2, and write_pipe_4.
574bool AMDGPULibCalls::fold_read_write_pipe(CallInst *CI, IRBuilder<> &B,
575 FuncInfo &FInfo) {
576 auto *Callee = CI->getCalledFunction();
577 if (!Callee->isDeclaration())
578 return false;
579
580 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 580, __PRETTY_FUNCTION__))
;
581 auto *M = Callee->getParent();
582 auto &Ctx = M->getContext();
583 std::string Name = Callee->getName();
584 auto NumArg = CI->getNumArgOperands();
585 if (NumArg != 4 && NumArg != 6)
586 return false;
587 auto *PacketSize = CI->getArgOperand(NumArg - 2);
588 auto *PacketAlign = CI->getArgOperand(NumArg - 1);
589 if (!isa<ConstantInt>(PacketSize) || !isa<ConstantInt>(PacketAlign))
590 return false;
591 unsigned Size = cast<ConstantInt>(PacketSize)->getZExtValue();
592 unsigned Align = cast<ConstantInt>(PacketAlign)->getZExtValue();
593 if (Size != Align || !isPowerOf2_32(Size))
594 return false;
595
596 Type *PtrElemTy;
597 if (Size <= 8)
598 PtrElemTy = Type::getIntNTy(Ctx, Size * 8);
599 else
600 PtrElemTy = VectorType::get(Type::getInt64Ty(Ctx), Size / 8);
601 unsigned PtrArgLoc = CI->getNumArgOperands() - 3;
602 auto PtrArg = CI->getArgOperand(PtrArgLoc);
603 unsigned PtrArgAS = PtrArg->getType()->getPointerAddressSpace();
604 auto *PtrTy = llvm::PointerType::get(PtrElemTy, PtrArgAS);
605
606 SmallVector<llvm::Type *, 6> ArgTys;
607 for (unsigned I = 0; I != PtrArgLoc; ++I)
608 ArgTys.push_back(CI->getArgOperand(I)->getType());
609 ArgTys.push_back(PtrTy);
610
611 Name = Name + "_" + std::to_string(Size);
612 auto *FTy = FunctionType::get(Callee->getReturnType(),
613 ArrayRef<Type *>(ArgTys), false);
614 AMDGPULibFunc NewLibFunc(Name, FTy);
615 FunctionCallee F = AMDGPULibFunc::getOrInsertFunction(M, NewLibFunc);
616 if (!F)
617 return false;
618
619 auto *BCast = B.CreatePointerCast(PtrArg, PtrTy);
620 SmallVector<Value *, 6> Args;
621 for (unsigned I = 0; I != PtrArgLoc; ++I)
622 Args.push_back(CI->getArgOperand(I));
623 Args.push_back(BCast);
624
625 auto *NCI = B.CreateCall(F, Args);
626 NCI->setAttributes(CI->getAttributes());
627 CI->replaceAllUsesWith(NCI);
628 CI->dropAllReferences();
629 CI->eraseFromParent();
630
631 return true;
632}
633
634// This function returns false if no change; return true otherwise.
635bool AMDGPULibCalls::fold(CallInst *CI, AliasAnalysis *AA) {
636 this->CI = CI;
637 Function *Callee = CI->getCalledFunction();
638
639 // Ignore indirect calls.
640 if (Callee == 0) return false;
14
Taking false branch
641
642 FuncInfo FInfo;
643 if (!parseFunctionName(Callee->getName(), &FInfo))
15
Assuming the condition is false
16
Taking false branch
644 return false;
645
646 // Further check the number of arguments to see if they match.
647 if (CI->getNumArgOperands() != FInfo.getNumArgs())
17
Assuming the condition is false
18
Taking false branch
648 return false;
649
650 BasicBlock *BB = CI->getParent();
651 LLVMContext &Context = CI->getParent()->getContext();
652 IRBuilder<> B(Context);
653
654 // Set the builder to the instruction after the call.
655 B.SetInsertPoint(BB, CI->getIterator());
656
657 // Copy fast flags from the original call.
658 if (const FPMathOperator *FPOp = dyn_cast<const FPMathOperator>(CI))
19
Taking false branch
659 B.setFastMathFlags(FPOp->getFastMathFlags());
660
661 if (TDOFold(CI, FInfo))
20
Taking false branch
662 return true;
663
664 // Under unsafe-math, evaluate calls if possible.
665 // According to Brian Sumner, we can do this for all f32 function calls
666 // using host's double function calls.
667 if (isUnsafeMath(CI) && evaluateCall(CI, FInfo))
21
Assuming the condition is true
22
Calling 'AMDGPULibCalls::evaluateCall'
668 return true;
669
670 // Specilized optimizations for each function call
671 switch (FInfo.getId()) {
672 case AMDGPULibFunc::EI_RECIP:
673 // skip vector function
674 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 676, __PRETTY_FUNCTION__))
675 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 676, __PRETTY_FUNCTION__))
676 "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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 676, __PRETTY_FUNCTION__))
;
677 return (getVecSize(FInfo) != 1) ? false : fold_recip(CI, B, FInfo);
678
679 case AMDGPULibFunc::EI_DIVIDE:
680 // skip vector function
681 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 683, __PRETTY_FUNCTION__))
682 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 683, __PRETTY_FUNCTION__))
683 "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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 683, __PRETTY_FUNCTION__))
;
684 return (getVecSize(FInfo) != 1) ? false : fold_divide(CI, B, FInfo);
685
686 case AMDGPULibFunc::EI_POW:
687 case AMDGPULibFunc::EI_POWR:
688 case AMDGPULibFunc::EI_POWN:
689 return fold_pow(CI, B, FInfo);
690
691 case AMDGPULibFunc::EI_ROOTN:
692 // skip vector function
693 return (getVecSize(FInfo) != 1) ? false : fold_rootn(CI, B, FInfo);
694
695 case AMDGPULibFunc::EI_FMA:
696 case AMDGPULibFunc::EI_MAD:
697 case AMDGPULibFunc::EI_NFMA:
698 // skip vector function
699 return (getVecSize(FInfo) != 1) ? false : fold_fma_mad(CI, B, FInfo);
700
701 case AMDGPULibFunc::EI_SQRT:
702 return isUnsafeMath(CI) && fold_sqrt(CI, B, FInfo);
703 case AMDGPULibFunc::EI_COS:
704 case AMDGPULibFunc::EI_SIN:
705 if ((getArgType(FInfo) == AMDGPULibFunc::F32 ||
706 getArgType(FInfo) == AMDGPULibFunc::F64)
707 && (FInfo.getPrefix() == AMDGPULibFunc::NOPFX))
708 return fold_sincos(CI, B, AA);
709
710 break;
711 case AMDGPULibFunc::EI_READ_PIPE_2:
712 case AMDGPULibFunc::EI_READ_PIPE_4:
713 case AMDGPULibFunc::EI_WRITE_PIPE_2:
714 case AMDGPULibFunc::EI_WRITE_PIPE_4:
715 return fold_read_write_pipe(CI, B, FInfo);
716
717 default:
718 break;
719 }
720
721 return false;
722}
723
724bool AMDGPULibCalls::TDOFold(CallInst *CI, const FuncInfo &FInfo) {
725 // Table-Driven optimization
726 const TableRef tr = getOptTable(FInfo.getId());
727 if (tr.size==0)
728 return false;
729
730 int const sz = (int)tr.size;
731 const TableEntry * const ftbl = tr.table;
732 Value *opr0 = CI->getArgOperand(0);
733
734 if (getVecSize(FInfo) > 1) {
735 if (ConstantDataVector *CV = dyn_cast<ConstantDataVector>(opr0)) {
736 SmallVector<double, 0> DVal;
737 for (int eltNo = 0; eltNo < getVecSize(FInfo); ++eltNo) {
738 ConstantFP *eltval = dyn_cast<ConstantFP>(
739 CV->getElementAsConstant((unsigned)eltNo));
740 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 740, __PRETTY_FUNCTION__))
;
741 bool found = false;
742 for (int i=0; i < sz; ++i) {
743 if (eltval->isExactlyValue(ftbl[i].input)) {
744 DVal.push_back(ftbl[i].result);
745 found = true;
746 break;
747 }
748 }
749 if (!found) {
750 // This vector constants not handled yet.
751 return false;
752 }
753 }
754 LLVMContext &context = CI->getParent()->getParent()->getContext();
755 Constant *nval;
756 if (getArgType(FInfo) == AMDGPULibFunc::F32) {
757 SmallVector<float, 0> FVal;
758 for (unsigned i = 0; i < DVal.size(); ++i) {
759 FVal.push_back((float)DVal[i]);
760 }
761 ArrayRef<float> tmp(FVal);
762 nval = ConstantDataVector::get(context, tmp);
763 } else { // F64
764 ArrayRef<double> tmp(DVal);
765 nval = ConstantDataVector::get(context, tmp);
766 }
767 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *nval << "\n"; } } while
(false)
;
768 replaceCall(nval);
769 return true;
770 }
771 } else {
772 // Scalar version
773 if (ConstantFP *CF = dyn_cast<ConstantFP>(opr0)) {
774 for (int i = 0; i < sz; ++i) {
775 if (CF->isExactlyValue(ftbl[i].input)) {
776 Value *nval = ConstantFP::get(CF->getType(), ftbl[i].result);
777 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *nval << "\n"; } } while
(false)
;
778 replaceCall(nval);
779 return true;
780 }
781 }
782 }
783 }
784
785 return false;
786}
787
788bool AMDGPULibCalls::replaceWithNative(CallInst *CI, const FuncInfo &FInfo) {
789 Module *M = CI->getModule();
790 if (getArgType(FInfo) != AMDGPULibFunc::F32 ||
791 FInfo.getPrefix() != AMDGPULibFunc::NOPFX ||
792 !HasNative(FInfo.getId()))
793 return false;
794
795 AMDGPULibFunc nf = FInfo;
796 nf.setPrefix(AMDGPULibFunc::NATIVE);
797 if (FunctionCallee FPExpr = getFunction(M, nf)) {
798 LLVM_DEBUG(dbgs() << "AMDIC: " << *CI << " ---> ")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { dbgs() << "AMDIC: " << *
CI << " ---> "; } } while (false)
;
799
800 CI->setCalledFunction(FPExpr);
801
802 LLVM_DEBUG(dbgs() << *CI << '\n')do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { dbgs() << *CI << '\n'; }
} while (false)
;
803
804 return true;
805 }
806 return false;
807}
808
809// [native_]half_recip(c) ==> 1.0/c
810bool AMDGPULibCalls::fold_recip(CallInst *CI, IRBuilder<> &B,
811 const FuncInfo &FInfo) {
812 Value *opr0 = CI->getArgOperand(0);
813 if (ConstantFP *CF = dyn_cast<ConstantFP>(opr0)) {
814 // Just create a normal div. Later, InstCombine will be able
815 // to compute the divide into a constant (avoid check float infinity
816 // or subnormal at this point).
817 Value *nval = B.CreateFDiv(ConstantFP::get(CF->getType(), 1.0),
818 opr0,
819 "recip2div");
820 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *nval << "\n"; } } while
(false)
;
821 replaceCall(nval);
822 return true;
823 }
824 return false;
825}
826
827// [native_]half_divide(x, c) ==> x/c
828bool AMDGPULibCalls::fold_divide(CallInst *CI, IRBuilder<> &B,
829 const FuncInfo &FInfo) {
830 Value *opr0 = CI->getArgOperand(0);
831 Value *opr1 = CI->getArgOperand(1);
832 ConstantFP *CF0 = dyn_cast<ConstantFP>(opr0);
833 ConstantFP *CF1 = dyn_cast<ConstantFP>(opr1);
834
835 if ((CF0 && CF1) || // both are constants
836 (CF1 && (getArgType(FInfo) == AMDGPULibFunc::F32)))
837 // CF1 is constant && f32 divide
838 {
839 Value *nval1 = B.CreateFDiv(ConstantFP::get(opr1->getType(), 1.0),
840 opr1, "__div2recip");
841 Value *nval = B.CreateFMul(opr0, nval1, "__div2mul");
842 replaceCall(nval);
843 return true;
844 }
845 return false;
846}
847
848namespace llvm {
849static double log2(double V) {
850#if _XOPEN_SOURCE700 >= 600 || _ISOC99_SOURCE1 || _POSIX_C_SOURCE200809L >= 200112L
851 return ::log2(V);
852#else
853 return log(V) / 0.693147180559945309417;
854#endif
855}
856}
857
858bool AMDGPULibCalls::fold_pow(CallInst *CI, IRBuilder<> &B,
859 const FuncInfo &FInfo) {
860 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 863, __PRETTY_FUNCTION__))
861 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 863, __PRETTY_FUNCTION__))
862 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 863, __PRETTY_FUNCTION__))
863 "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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 863, __PRETTY_FUNCTION__))
;
864
865 Value *opr0, *opr1;
866 ConstantFP *CF;
867 ConstantInt *CINT;
868 ConstantAggregateZero *CZero;
869 Type *eltType;
870
871 opr0 = CI->getArgOperand(0);
872 opr1 = CI->getArgOperand(1);
873 CZero = dyn_cast<ConstantAggregateZero>(opr1);
874 if (getVecSize(FInfo) == 1) {
875 eltType = opr0->getType();
876 CF = dyn_cast<ConstantFP>(opr1);
877 CINT = dyn_cast<ConstantInt>(opr1);
878 } else {
879 VectorType *VTy = dyn_cast<VectorType>(opr0->getType());
880 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 880, __PRETTY_FUNCTION__))
;
881 eltType = VTy->getElementType();
882 ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(opr1);
883
884 // Now, only Handle vector const whose elements have the same value.
885 CF = CDV ? dyn_cast_or_null<ConstantFP>(CDV->getSplatValue()) : nullptr;
886 CINT = CDV ? dyn_cast_or_null<ConstantInt>(CDV->getSplatValue()) : nullptr;
887 }
888
889 // No unsafe math , no constant argument, do nothing
890 if (!isUnsafeMath(CI) && !CF && !CINT && !CZero)
891 return false;
892
893 // 0x1111111 means that we don't do anything for this call.
894 int ci_opr1 = (CINT ? (int)CINT->getSExtValue() : 0x1111111);
895
896 if ((CF && CF->isZero()) || (CINT && ci_opr1 == 0) || CZero) {
897 // pow/powr/pown(x, 0) == 1
898 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> 1\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> 1\n"; } } while (false)
;
899 Constant *cnval = ConstantFP::get(eltType, 1.0);
900 if (getVecSize(FInfo) > 1) {
901 cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
902 }
903 replaceCall(cnval);
904 return true;
905 }
906 if ((CF && CF->isExactlyValue(1.0)) || (CINT && ci_opr1 == 1)) {
907 // pow/powr/pown(x, 1.0) = x
908 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << "\n"; } } while
(false)
;
909 replaceCall(opr0);
910 return true;
911 }
912 if ((CF && CF->isExactlyValue(2.0)) || (CINT && ci_opr1 == 2)) {
913 // pow/powr/pown(x, 2.0) = x*x
914 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << " * " << *opr0do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " * " <<
*opr0 << "\n"; } } while (false)
915 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << *opr0 << " * " <<
*opr0 << "\n"; } } while (false)
;
916 Value *nval = B.CreateFMul(opr0, opr0, "__pow2");
917 replaceCall(nval);
918 return true;
919 }
920 if ((CF && CF->isExactlyValue(-1.0)) || (CINT && ci_opr1 == -1)) {
921 // pow/powr/pown(x, -1.0) = 1.0/x
922 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> 1 / " << *opr0 << "\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> 1 / " << *opr0 << "\n"; } }
while (false)
;
923 Constant *cnval = ConstantFP::get(eltType, 1.0);
924 if (getVecSize(FInfo) > 1) {
925 cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
926 }
927 Value *nval = B.CreateFDiv(cnval, opr0, "__powrecip");
928 replaceCall(nval);
929 return true;
930 }
931
932 Module *M = CI->getModule();
933 if (CF && (CF->isExactlyValue(0.5) || CF->isExactlyValue(-0.5))) {
934 // pow[r](x, [-]0.5) = sqrt(x)
935 bool issqrt = CF->isExactlyValue(0.5);
936 if (FunctionCallee FPExpr =
937 getFunction(M, AMDGPULibFunc(issqrt ? AMDGPULibFunc::EI_SQRT
938 : AMDGPULibFunc::EI_RSQRT,
939 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 FunctionCallee ExpExpr =
1007 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_EXP2, 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) &&(((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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1040, __PRETTY_FUNCTION__))
1040 "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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1040, __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 FunctionCallee AbsExpr =
1094 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_FABS, 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 FunctionCallee LogExpr =
1103 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_LOG2, 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 (FunctionCallee FPExpr =
1163 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_SQRT, 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 (FunctionCallee FPExpr =
1172 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_CBRT, 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 (FunctionCallee FPExpr =
1190 getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_RSQRT, 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
1246FunctionCallee AMDGPULibCalls::getNativeFunction(Module *M,
1247 const FuncInfo &FInfo) {
1248 if (getArgType(FInfo) == AMDGPULibFunc::F64 || !HasNative(FInfo.getId()))
1249 return nullptr;
1250 FuncInfo nf = FInfo;
1251 nf.setPrefix(AMDGPULibFunc::NATIVE);
1252 return getFunction(M, nf);
1253}
1254
1255// fold sqrt -> native_sqrt (x)
1256bool AMDGPULibCalls::fold_sqrt(CallInst *CI, IRBuilder<> &B,
1257 const FuncInfo &FInfo) {
1258 if (getArgType(FInfo) == AMDGPULibFunc::F32 && (getVecSize(FInfo) == 1) &&
1259 (FInfo.getPrefix() != AMDGPULibFunc::NATIVE)) {
1260 if (FunctionCallee FPExpr = getNativeFunction(
1261 CI->getModule(), AMDGPULibFunc(AMDGPULibFunc::EI_SQRT, FInfo))) {
1262 Value *opr0 = CI->getArgOperand(0);
1263 LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << "sqrt(" << *opr0 <<
")\n"; } } while (false)
1264 << "sqrt(" << *opr0 << ")\n")do { if (::llvm::DebugFlag && ::llvm::isCurrentDebugType
("amdgpu-simplifylib")) { errs() << "AMDIC: " << *
CI << " ---> " << "sqrt(" << *opr0 <<
")\n"; } } while (false)
;
1265 Value *nval = CreateCallEx(B,FPExpr, opr0, "__sqrt");
1266 replaceCall(nval);
1267 return true;
1268 }
1269 }
1270 return false;
1271}
1272
1273// fold sin, cos -> sincos.
1274bool AMDGPULibCalls::fold_sincos(CallInst *CI, IRBuilder<> &B,
1275 AliasAnalysis *AA) {
1276 AMDGPULibFunc fInfo;
1277 if (!AMDGPULibFunc::parse(CI->getCalledFunction()->getName(), fInfo))
1278 return false;
1279
1280 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1281, __PRETTY_FUNCTION__))
1281 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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1281, __PRETTY_FUNCTION__))
;
1282 bool const isSin = fInfo.getId() == AMDGPULibFunc::EI_SIN;
1283
1284 Value *CArgVal = CI->getArgOperand(0);
1285 BasicBlock * const CBB = CI->getParent();
1286
1287 int const MaxScan = 30;
1288
1289 { // fold in load value.
1290 LoadInst *LI = dyn_cast<LoadInst>(CArgVal);
1291 if (LI && LI->getParent() == CBB) {
1292 BasicBlock::iterator BBI = LI->getIterator();
1293 Value *AvailableVal = FindAvailableLoadedValue(LI, CBB, BBI, MaxScan, AA);
1294 if (AvailableVal) {
1295 CArgVal->replaceAllUsesWith(AvailableVal);
1296 if (CArgVal->getNumUses() == 0)
1297 LI->eraseFromParent();
1298 CArgVal = CI->getArgOperand(0);
1299 }
1300 }
1301 }
1302
1303 Module *M = CI->getModule();
1304 fInfo.setId(isSin ? AMDGPULibFunc::EI_COS : AMDGPULibFunc::EI_SIN);
1305 std::string const PairName = fInfo.mangle();
1306
1307 CallInst *UI = nullptr;
1308 for (User* U : CArgVal->users()) {
1309 CallInst *XI = dyn_cast_or_null<CallInst>(U);
1310 if (!XI || XI == CI || XI->getParent() != CBB)
1311 continue;
1312
1313 Function *UCallee = XI->getCalledFunction();
1314 if (!UCallee || !UCallee->getName().equals(PairName))
1315 continue;
1316
1317 BasicBlock::iterator BBI = CI->getIterator();
1318 if (BBI == CI->getParent()->begin())
1319 break;
1320 --BBI;
1321 for (int I = MaxScan; I > 0 && BBI != CBB->begin(); --BBI, --I) {
1322 if (cast<Instruction>(BBI) == XI) {
1323 UI = XI;
1324 break;
1325 }
1326 }
1327 if (UI) break;
1328 }
1329
1330 if (!UI) return false;
1331
1332 // Merge the sin and cos.
1333
1334 // for OpenCL 2.0 we have only generic implementation of sincos
1335 // function.
1336 AMDGPULibFunc nf(AMDGPULibFunc::EI_SINCOS, fInfo);
1337 nf.getLeads()[0].PtrKind = AMDGPULibFunc::getEPtrKindFromAddrSpace(AMDGPUAS::FLAT_ADDRESS);
1338 FunctionCallee Fsincos = 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() != AMDGPUAS::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->getAllocatedType(), Alloc);
1361 CI->replaceAllUsesWith(Reload);
1362 UI->eraseFromParent();
1363 CI->eraseFromParent();
1364 } else { // CI->sin, UI->cos
1365 Instruction *Reload = B.CreateLoad(Alloc->getAllocatedType(), 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!")((BB && "Entry block not found!") ? static_cast<void
> (0) : __assert_fail ("BB && \"Entry block not found!\""
, "/build/llvm-toolchain-snapshot-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1378, __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)
23
Assuming 'numArgs' is <= 3
24
Taking false branch
1595 return false;
1596
1597 Constant *copr0 = nullptr;
1598 Constant *copr1 = nullptr;
1599 Constant *copr2 = nullptr;
1600 if (numArgs > 0) {
25
Assuming 'numArgs' is <= 0
26
Taking false branch
1601 if ((copr0 = dyn_cast<Constant>(aCI->getArgOperand(0))) == nullptr)
1602 return false;
1603 }
1604
1605 if (numArgs > 1) {
27
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) {
28
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);
29
Assuming the condition is false
1622 if (getVecSize(FInfo) == 1) {
30
Assuming the condition is false
31
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) {
32
Assuming the condition is false
33
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) {
34
Assuming the condition is true
35
Taking true branch
1645 nval0 = ConstantFP::get(CI->getType(), DVal0[0]);
36
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 &&((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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1674, __PRETTY_FUNCTION__))
1674 "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-9~svn358520/lib/Target/AMDGPU/AMDGPULibCalls.cpp"
, 1674, __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)
3
Assuming 'DebugFlag' is 0
4
Loop condition is false. Exiting loop
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)
5
Assuming the condition is false
6
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; ) {
7
Loop condition is true. Entering loop body
1726 // Ignore non-calls.
1727 CallInst *CI = dyn_cast<CallInst>(I);
1728 ++I;
1729 if (!CI) continue;
8
Assuming 'CI' is non-null
9
Taking false branch
1730
1731 // Ignore indirect calls.
1732 Function *Callee = CI->getCalledFunction();
1733 if (Callee == 0) continue;
10
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
)
11
Assuming 'DebugFlag' is 0
12
Loop condition is false. Exiting loop
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))
13
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}