forked from OSchip/llvm-project
1766 lines
54 KiB
C++
1766 lines
54 KiB
C++
//===- AMDGPULibCalls.cpp -------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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/// \file
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/// This file does AMD library function optimizations.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "amdgpu-simplifylib"
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#include "AMDGPU.h"
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#include "AMDGPULibFunc.h"
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#include "llvm/Analysis/AliasAnalysis.h"
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#include "llvm/Analysis/Loads.h"
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#include "llvm/ADT/StringSet.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/Instructions.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/ValueSymbolTable.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Target/TargetOptions.h"
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#include <vector>
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#include <cmath>
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using namespace llvm;
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static cl::opt<bool> EnablePreLink("amdgpu-prelink",
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cl::desc("Enable pre-link mode optimizations"),
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cl::init(false),
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cl::Hidden);
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static cl::list<std::string> UseNative("amdgpu-use-native",
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cl::desc("Comma separated list of functions to replace with native, or all"),
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cl::CommaSeparated, cl::ValueOptional,
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cl::Hidden);
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#define MATH_PI 3.14159265358979323846264338327950288419716939937511
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#define MATH_E 2.71828182845904523536028747135266249775724709369996
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#define MATH_SQRT2 1.41421356237309504880168872420969807856967187537695
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#define MATH_LOG2E 1.4426950408889634073599246810018921374266459541529859
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#define MATH_LOG10E 0.4342944819032518276511289189166050822943970058036665
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// Value of log2(10)
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#define MATH_LOG2_10 3.3219280948873623478703194294893901758648313930245806
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// Value of 1 / log2(10)
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#define MATH_RLOG2_10 0.3010299956639811952137388947244930267681898814621085
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// Value of 1 / M_LOG2E_F = 1 / log2(e)
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#define MATH_RLOG2_E 0.6931471805599453094172321214581765680755001343602552
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namespace llvm {
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class AMDGPULibCalls {
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private:
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typedef llvm::AMDGPULibFunc FuncInfo;
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// -fuse-native.
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bool AllNative = false;
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bool useNativeFunc(const StringRef F) const;
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// Return a pointer (pointer expr) to the function if function defintion with
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// "FuncName" exists. It may create a new function prototype in pre-link mode.
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Constant *getFunction(Module *M, const FuncInfo& fInfo);
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// Replace a normal function with its native version.
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bool replaceWithNative(CallInst *CI, const FuncInfo &FInfo);
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bool parseFunctionName(const StringRef& FMangledName,
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FuncInfo *FInfo=nullptr /*out*/);
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bool TDOFold(CallInst *CI, const FuncInfo &FInfo);
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/* Specialized optimizations */
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// recip (half or native)
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bool fold_recip(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// divide (half or native)
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bool fold_divide(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// pow/powr/pown
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bool fold_pow(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// rootn
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bool fold_rootn(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// fma/mad
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bool fold_fma_mad(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// -fuse-native for sincos
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bool sincosUseNative(CallInst *aCI, const FuncInfo &FInfo);
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// evaluate calls if calls' arguments are constants.
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bool evaluateScalarMathFunc(FuncInfo &FInfo, double& Res0,
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double& Res1, Constant *copr0, Constant *copr1, Constant *copr2);
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bool evaluateCall(CallInst *aCI, FuncInfo &FInfo);
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// exp
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bool fold_exp(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// exp2
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bool fold_exp2(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// exp10
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bool fold_exp10(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// log
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bool fold_log(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// log2
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bool fold_log2(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// log10
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bool fold_log10(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// sqrt
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bool fold_sqrt(CallInst *CI, IRBuilder<> &B, const FuncInfo &FInfo);
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// sin/cos
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bool fold_sincos(CallInst * CI, IRBuilder<> &B, AliasAnalysis * AA);
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// __read_pipe/__write_pipe
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bool fold_read_write_pipe(CallInst *CI, IRBuilder<> &B, FuncInfo &FInfo);
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// Get insertion point at entry.
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BasicBlock::iterator getEntryIns(CallInst * UI);
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// Insert an Alloc instruction.
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AllocaInst* insertAlloca(CallInst * UI, IRBuilder<> &B, const char *prefix);
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// Get a scalar native builtin signle argument FP function
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Constant* getNativeFunction(Module* M, const FuncInfo &FInfo);
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protected:
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CallInst *CI;
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bool isUnsafeMath(const CallInst *CI) const;
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void replaceCall(Value *With) {
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CI->replaceAllUsesWith(With);
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CI->eraseFromParent();
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}
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public:
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bool fold(CallInst *CI, AliasAnalysis *AA = nullptr);
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void initNativeFuncs();
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// Replace a normal math function call with that native version
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bool useNative(CallInst *CI);
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};
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} // end llvm namespace
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namespace {
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class AMDGPUSimplifyLibCalls : public FunctionPass {
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AMDGPULibCalls Simplifier;
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const TargetOptions Options;
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public:
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static char ID; // Pass identification
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AMDGPUSimplifyLibCalls(const TargetOptions &Opt = TargetOptions())
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: FunctionPass(ID), Options(Opt) {
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initializeAMDGPUSimplifyLibCallsPass(*PassRegistry::getPassRegistry());
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}
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void getAnalysisUsage(AnalysisUsage &AU) const override {
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AU.addRequired<AAResultsWrapperPass>();
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}
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bool runOnFunction(Function &M) override;
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};
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class AMDGPUUseNativeCalls : public FunctionPass {
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AMDGPULibCalls Simplifier;
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public:
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static char ID; // Pass identification
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AMDGPUUseNativeCalls() : FunctionPass(ID) {
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initializeAMDGPUUseNativeCallsPass(*PassRegistry::getPassRegistry());
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Simplifier.initNativeFuncs();
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}
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bool runOnFunction(Function &F) override;
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};
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} // end anonymous namespace.
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char AMDGPUSimplifyLibCalls::ID = 0;
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char AMDGPUUseNativeCalls::ID = 0;
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INITIALIZE_PASS_BEGIN(AMDGPUSimplifyLibCalls, "amdgpu-simplifylib",
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"Simplify well-known AMD library calls", false, false)
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INITIALIZE_PASS_DEPENDENCY(AAResultsWrapperPass)
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INITIALIZE_PASS_END(AMDGPUSimplifyLibCalls, "amdgpu-simplifylib",
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"Simplify well-known AMD library calls", false, false)
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INITIALIZE_PASS(AMDGPUUseNativeCalls, "amdgpu-usenative",
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"Replace builtin math calls with that native versions.",
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false, false)
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template <typename IRB>
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static CallInst *CreateCallEx(IRB &B, Value *Callee, Value *Arg,
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const Twine &Name = "") {
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CallInst *R = B.CreateCall(Callee, Arg, Name);
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if (Function* F = dyn_cast<Function>(Callee))
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R->setCallingConv(F->getCallingConv());
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return R;
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}
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template <typename IRB>
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static CallInst *CreateCallEx2(IRB &B, Value *Callee, Value *Arg1, Value *Arg2,
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const Twine &Name = "") {
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CallInst *R = B.CreateCall(Callee, {Arg1, Arg2}, Name);
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if (Function* F = dyn_cast<Function>(Callee))
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R->setCallingConv(F->getCallingConv());
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return R;
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}
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// Data structures for table-driven optimizations.
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// FuncTbl works for both f32 and f64 functions with 1 input argument
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struct TableEntry {
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double result;
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double input;
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};
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/* a list of {result, input} */
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static const TableEntry tbl_acos[] = {
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{MATH_PI/2.0, 0.0},
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{MATH_PI/2.0, -0.0},
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{0.0, 1.0},
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{MATH_PI, -1.0}
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};
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static const TableEntry tbl_acosh[] = {
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{0.0, 1.0}
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};
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static const TableEntry tbl_acospi[] = {
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{0.5, 0.0},
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{0.5, -0.0},
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{0.0, 1.0},
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{1.0, -1.0}
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};
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static const TableEntry tbl_asin[] = {
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{0.0, 0.0},
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{-0.0, -0.0},
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{MATH_PI/2.0, 1.0},
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{-MATH_PI/2.0, -1.0}
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};
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static const TableEntry tbl_asinh[] = {
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{0.0, 0.0},
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{-0.0, -0.0}
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};
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static const TableEntry tbl_asinpi[] = {
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{0.0, 0.0},
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{-0.0, -0.0},
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{0.5, 1.0},
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{-0.5, -1.0}
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};
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static const TableEntry tbl_atan[] = {
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{0.0, 0.0},
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{-0.0, -0.0},
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{MATH_PI/4.0, 1.0},
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{-MATH_PI/4.0, -1.0}
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};
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static const TableEntry tbl_atanh[] = {
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{0.0, 0.0},
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{-0.0, -0.0}
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};
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static const TableEntry tbl_atanpi[] = {
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{0.0, 0.0},
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{-0.0, -0.0},
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{0.25, 1.0},
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{-0.25, -1.0}
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};
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static const TableEntry tbl_cbrt[] = {
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{0.0, 0.0},
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{-0.0, -0.0},
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{1.0, 1.0},
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{-1.0, -1.0},
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};
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static const TableEntry tbl_cos[] = {
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{1.0, 0.0},
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{1.0, -0.0}
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};
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static const TableEntry tbl_cosh[] = {
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{1.0, 0.0},
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{1.0, -0.0}
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};
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static const TableEntry tbl_cospi[] = {
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{1.0, 0.0},
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{1.0, -0.0}
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};
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static const TableEntry tbl_erfc[] = {
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{1.0, 0.0},
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{1.0, -0.0}
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};
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static const TableEntry tbl_erf[] = {
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{0.0, 0.0},
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{-0.0, -0.0}
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};
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static const TableEntry tbl_exp[] = {
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{1.0, 0.0},
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{1.0, -0.0},
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{MATH_E, 1.0}
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};
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static const TableEntry tbl_exp2[] = {
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{1.0, 0.0},
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{1.0, -0.0},
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{2.0, 1.0}
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};
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static const TableEntry tbl_exp10[] = {
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{1.0, 0.0},
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{1.0, -0.0},
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{10.0, 1.0}
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};
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static const TableEntry tbl_expm1[] = {
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{0.0, 0.0},
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{-0.0, -0.0}
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};
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static const TableEntry tbl_log[] = {
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{0.0, 1.0},
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{1.0, MATH_E}
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};
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static const TableEntry tbl_log2[] = {
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{0.0, 1.0},
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{1.0, 2.0}
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};
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static const TableEntry tbl_log10[] = {
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{0.0, 1.0},
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{1.0, 10.0}
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};
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static const TableEntry tbl_rsqrt[] = {
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{1.0, 1.0},
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{1.0/MATH_SQRT2, 2.0}
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};
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static const TableEntry tbl_sin[] = {
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{0.0, 0.0},
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{-0.0, -0.0}
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};
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static const TableEntry tbl_sinh[] = {
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{0.0, 0.0},
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{-0.0, -0.0}
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};
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static const TableEntry tbl_sinpi[] = {
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{0.0, 0.0},
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{-0.0, -0.0}
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};
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static const TableEntry tbl_sqrt[] = {
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{0.0, 0.0},
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{1.0, 1.0},
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{MATH_SQRT2, 2.0}
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};
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static const TableEntry tbl_tan[] = {
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{0.0, 0.0},
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{-0.0, -0.0}
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};
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static const TableEntry tbl_tanh[] = {
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{0.0, 0.0},
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{-0.0, -0.0}
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};
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static const TableEntry tbl_tanpi[] = {
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{0.0, 0.0},
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{-0.0, -0.0}
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};
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static const TableEntry tbl_tgamma[] = {
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{1.0, 1.0},
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{1.0, 2.0},
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{2.0, 3.0},
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{6.0, 4.0}
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};
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static bool HasNative(AMDGPULibFunc::EFuncId id) {
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switch(id) {
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case AMDGPULibFunc::EI_DIVIDE:
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case AMDGPULibFunc::EI_COS:
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case AMDGPULibFunc::EI_EXP:
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case AMDGPULibFunc::EI_EXP2:
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case AMDGPULibFunc::EI_EXP10:
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case AMDGPULibFunc::EI_LOG:
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case AMDGPULibFunc::EI_LOG2:
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case AMDGPULibFunc::EI_LOG10:
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case AMDGPULibFunc::EI_POWR:
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case AMDGPULibFunc::EI_RECIP:
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case AMDGPULibFunc::EI_RSQRT:
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case AMDGPULibFunc::EI_SIN:
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case AMDGPULibFunc::EI_SINCOS:
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case AMDGPULibFunc::EI_SQRT:
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case AMDGPULibFunc::EI_TAN:
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return true;
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default:;
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}
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return false;
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}
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struct TableRef {
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size_t size;
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const TableEntry *table; // variable size: from 0 to (size - 1)
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TableRef() : size(0), table(nullptr) {}
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template <size_t N>
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TableRef(const TableEntry (&tbl)[N]) : size(N), table(&tbl[0]) {}
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};
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static TableRef getOptTable(AMDGPULibFunc::EFuncId id) {
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switch(id) {
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case AMDGPULibFunc::EI_ACOS: return TableRef(tbl_acos);
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case AMDGPULibFunc::EI_ACOSH: return TableRef(tbl_acosh);
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case AMDGPULibFunc::EI_ACOSPI: return TableRef(tbl_acospi);
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case AMDGPULibFunc::EI_ASIN: return TableRef(tbl_asin);
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case AMDGPULibFunc::EI_ASINH: return TableRef(tbl_asinh);
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case AMDGPULibFunc::EI_ASINPI: return TableRef(tbl_asinpi);
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case AMDGPULibFunc::EI_ATAN: return TableRef(tbl_atan);
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case AMDGPULibFunc::EI_ATANH: return TableRef(tbl_atanh);
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case AMDGPULibFunc::EI_ATANPI: return TableRef(tbl_atanpi);
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case AMDGPULibFunc::EI_CBRT: return TableRef(tbl_cbrt);
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case AMDGPULibFunc::EI_NCOS:
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case AMDGPULibFunc::EI_COS: return TableRef(tbl_cos);
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case AMDGPULibFunc::EI_COSH: return TableRef(tbl_cosh);
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case AMDGPULibFunc::EI_COSPI: return TableRef(tbl_cospi);
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case AMDGPULibFunc::EI_ERFC: return TableRef(tbl_erfc);
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case AMDGPULibFunc::EI_ERF: return TableRef(tbl_erf);
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case AMDGPULibFunc::EI_EXP: return TableRef(tbl_exp);
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case AMDGPULibFunc::EI_NEXP2:
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case AMDGPULibFunc::EI_EXP2: return TableRef(tbl_exp2);
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case AMDGPULibFunc::EI_EXP10: return TableRef(tbl_exp10);
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case AMDGPULibFunc::EI_EXPM1: return TableRef(tbl_expm1);
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case AMDGPULibFunc::EI_LOG: return TableRef(tbl_log);
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case AMDGPULibFunc::EI_NLOG2:
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case AMDGPULibFunc::EI_LOG2: return TableRef(tbl_log2);
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case AMDGPULibFunc::EI_LOG10: return TableRef(tbl_log10);
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case AMDGPULibFunc::EI_NRSQRT:
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case AMDGPULibFunc::EI_RSQRT: return TableRef(tbl_rsqrt);
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case AMDGPULibFunc::EI_NSIN:
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case AMDGPULibFunc::EI_SIN: return TableRef(tbl_sin);
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case AMDGPULibFunc::EI_SINH: return TableRef(tbl_sinh);
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case AMDGPULibFunc::EI_SINPI: return TableRef(tbl_sinpi);
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case AMDGPULibFunc::EI_NSQRT:
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case AMDGPULibFunc::EI_SQRT: return TableRef(tbl_sqrt);
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case AMDGPULibFunc::EI_TAN: return TableRef(tbl_tan);
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case AMDGPULibFunc::EI_TANH: return TableRef(tbl_tanh);
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case AMDGPULibFunc::EI_TANPI: return TableRef(tbl_tanpi);
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case AMDGPULibFunc::EI_TGAMMA: return TableRef(tbl_tgamma);
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default:;
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}
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return TableRef();
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}
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static inline int getVecSize(const AMDGPULibFunc& FInfo) {
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return FInfo.getLeads()[0].VectorSize;
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}
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static inline AMDGPULibFunc::EType getArgType(const AMDGPULibFunc& FInfo) {
|
|
return (AMDGPULibFunc::EType)FInfo.getLeads()[0].ArgType;
|
|
}
|
|
|
|
Constant *AMDGPULibCalls::getFunction(Module *M, const FuncInfo& fInfo) {
|
|
// If we are doing PreLinkOpt, the function is external. So it is safe to
|
|
// use getOrInsertFunction() at this stage.
|
|
|
|
return EnablePreLink ? AMDGPULibFunc::getOrInsertFunction(M, fInfo)
|
|
: AMDGPULibFunc::getFunction(M, fInfo);
|
|
}
|
|
|
|
bool AMDGPULibCalls::parseFunctionName(const StringRef& FMangledName,
|
|
FuncInfo *FInfo) {
|
|
return AMDGPULibFunc::parse(FMangledName, *FInfo);
|
|
}
|
|
|
|
bool AMDGPULibCalls::isUnsafeMath(const CallInst *CI) const {
|
|
if (auto Op = dyn_cast<FPMathOperator>(CI))
|
|
if (Op->isFast())
|
|
return true;
|
|
const Function *F = CI->getParent()->getParent();
|
|
Attribute Attr = F->getFnAttribute("unsafe-fp-math");
|
|
return Attr.getValueAsString() == "true";
|
|
}
|
|
|
|
bool AMDGPULibCalls::useNativeFunc(const StringRef F) const {
|
|
return AllNative ||
|
|
std::find(UseNative.begin(), UseNative.end(), F) != UseNative.end();
|
|
}
|
|
|
|
void AMDGPULibCalls::initNativeFuncs() {
|
|
AllNative = useNativeFunc("all") ||
|
|
(UseNative.getNumOccurrences() && UseNative.size() == 1 &&
|
|
UseNative.begin()->empty());
|
|
}
|
|
|
|
bool AMDGPULibCalls::sincosUseNative(CallInst *aCI, const FuncInfo &FInfo) {
|
|
bool native_sin = useNativeFunc("sin");
|
|
bool native_cos = useNativeFunc("cos");
|
|
|
|
if (native_sin && native_cos) {
|
|
Module *M = aCI->getModule();
|
|
Value *opr0 = aCI->getArgOperand(0);
|
|
|
|
AMDGPULibFunc nf;
|
|
nf.getLeads()[0].ArgType = FInfo.getLeads()[0].ArgType;
|
|
nf.getLeads()[0].VectorSize = FInfo.getLeads()[0].VectorSize;
|
|
|
|
nf.setPrefix(AMDGPULibFunc::NATIVE);
|
|
nf.setId(AMDGPULibFunc::EI_SIN);
|
|
Constant *sinExpr = getFunction(M, nf);
|
|
|
|
nf.setPrefix(AMDGPULibFunc::NATIVE);
|
|
nf.setId(AMDGPULibFunc::EI_COS);
|
|
Constant *cosExpr = getFunction(M, nf);
|
|
if (sinExpr && cosExpr) {
|
|
Value *sinval = CallInst::Create(sinExpr, opr0, "splitsin", aCI);
|
|
Value *cosval = CallInst::Create(cosExpr, opr0, "splitcos", aCI);
|
|
new StoreInst(cosval, aCI->getArgOperand(1), aCI);
|
|
|
|
DEBUG_WITH_TYPE("usenative", dbgs() << "<useNative> replace " << *aCI
|
|
<< " with native version of sin/cos");
|
|
|
|
replaceCall(sinval);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool AMDGPULibCalls::useNative(CallInst *aCI) {
|
|
CI = aCI;
|
|
Function *Callee = aCI->getCalledFunction();
|
|
|
|
FuncInfo FInfo;
|
|
if (!parseFunctionName(Callee->getName(), &FInfo) || !FInfo.isMangled() ||
|
|
FInfo.getPrefix() != AMDGPULibFunc::NOPFX ||
|
|
getArgType(FInfo) == AMDGPULibFunc::F64 || !HasNative(FInfo.getId()) ||
|
|
!(AllNative || useNativeFunc(FInfo.getName()))) {
|
|
return false;
|
|
}
|
|
|
|
if (FInfo.getId() == AMDGPULibFunc::EI_SINCOS)
|
|
return sincosUseNative(aCI, FInfo);
|
|
|
|
FInfo.setPrefix(AMDGPULibFunc::NATIVE);
|
|
Constant *F = getFunction(aCI->getModule(), FInfo);
|
|
if (!F)
|
|
return false;
|
|
|
|
aCI->setCalledFunction(F);
|
|
DEBUG_WITH_TYPE("usenative", dbgs() << "<useNative> replace " << *aCI
|
|
<< " with native version");
|
|
return true;
|
|
}
|
|
|
|
// Clang emits call of __read_pipe_2 or __read_pipe_4 for OpenCL read_pipe
|
|
// builtin, with appended type size and alignment arguments, where 2 or 4
|
|
// indicates the original number of arguments. The library has optimized version
|
|
// of __read_pipe_2/__read_pipe_4 when the type size and alignment has the same
|
|
// power of 2 value. This function transforms __read_pipe_2 to __read_pipe_2_N
|
|
// for such cases where N is the size in bytes of the type (N = 1, 2, 4, 8, ...,
|
|
// 128). The same for __read_pipe_4, write_pipe_2, and write_pipe_4.
|
|
bool AMDGPULibCalls::fold_read_write_pipe(CallInst *CI, IRBuilder<> &B,
|
|
FuncInfo &FInfo) {
|
|
auto *Callee = CI->getCalledFunction();
|
|
if (!Callee->isDeclaration())
|
|
return false;
|
|
|
|
assert(Callee->hasName() && "Invalid read_pipe/write_pipe function");
|
|
auto *M = Callee->getParent();
|
|
auto &Ctx = M->getContext();
|
|
std::string Name = Callee->getName();
|
|
auto NumArg = CI->getNumArgOperands();
|
|
if (NumArg != 4 && NumArg != 6)
|
|
return false;
|
|
auto *PacketSize = CI->getArgOperand(NumArg - 2);
|
|
auto *PacketAlign = CI->getArgOperand(NumArg - 1);
|
|
if (!isa<ConstantInt>(PacketSize) || !isa<ConstantInt>(PacketAlign))
|
|
return false;
|
|
unsigned Size = cast<ConstantInt>(PacketSize)->getZExtValue();
|
|
unsigned Align = cast<ConstantInt>(PacketAlign)->getZExtValue();
|
|
if (Size != Align || !isPowerOf2_32(Size))
|
|
return false;
|
|
|
|
Type *PtrElemTy;
|
|
if (Size <= 8)
|
|
PtrElemTy = Type::getIntNTy(Ctx, Size * 8);
|
|
else
|
|
PtrElemTy = VectorType::get(Type::getInt64Ty(Ctx), Size / 8);
|
|
unsigned PtrArgLoc = CI->getNumArgOperands() - 3;
|
|
auto PtrArg = CI->getArgOperand(PtrArgLoc);
|
|
unsigned PtrArgAS = PtrArg->getType()->getPointerAddressSpace();
|
|
auto *PtrTy = llvm::PointerType::get(PtrElemTy, PtrArgAS);
|
|
|
|
SmallVector<llvm::Type *, 6> ArgTys;
|
|
for (unsigned I = 0; I != PtrArgLoc; ++I)
|
|
ArgTys.push_back(CI->getArgOperand(I)->getType());
|
|
ArgTys.push_back(PtrTy);
|
|
|
|
Name = Name + "_" + std::to_string(Size);
|
|
auto *FTy = FunctionType::get(Callee->getReturnType(),
|
|
ArrayRef<Type *>(ArgTys), false);
|
|
AMDGPULibFunc NewLibFunc(Name, FTy);
|
|
auto *F = AMDGPULibFunc::getOrInsertFunction(M, NewLibFunc);
|
|
if (!F)
|
|
return false;
|
|
|
|
auto *BCast = B.CreatePointerCast(PtrArg, PtrTy);
|
|
SmallVector<Value *, 6> Args;
|
|
for (unsigned I = 0; I != PtrArgLoc; ++I)
|
|
Args.push_back(CI->getArgOperand(I));
|
|
Args.push_back(BCast);
|
|
|
|
auto *NCI = B.CreateCall(F, Args);
|
|
NCI->setAttributes(CI->getAttributes());
|
|
CI->replaceAllUsesWith(NCI);
|
|
CI->dropAllReferences();
|
|
CI->eraseFromParent();
|
|
|
|
return true;
|
|
}
|
|
|
|
// This function returns false if no change; return true otherwise.
|
|
bool AMDGPULibCalls::fold(CallInst *CI, AliasAnalysis *AA) {
|
|
this->CI = CI;
|
|
Function *Callee = CI->getCalledFunction();
|
|
|
|
// Ignore indirect calls.
|
|
if (Callee == 0) return false;
|
|
|
|
FuncInfo FInfo;
|
|
if (!parseFunctionName(Callee->getName(), &FInfo))
|
|
return false;
|
|
|
|
// Further check the number of arguments to see if they match.
|
|
if (CI->getNumArgOperands() != FInfo.getNumArgs())
|
|
return false;
|
|
|
|
BasicBlock *BB = CI->getParent();
|
|
LLVMContext &Context = CI->getParent()->getContext();
|
|
IRBuilder<> B(Context);
|
|
|
|
// Set the builder to the instruction after the call.
|
|
B.SetInsertPoint(BB, CI->getIterator());
|
|
|
|
// Copy fast flags from the original call.
|
|
if (const FPMathOperator *FPOp = dyn_cast<const FPMathOperator>(CI))
|
|
B.setFastMathFlags(FPOp->getFastMathFlags());
|
|
|
|
if (TDOFold(CI, FInfo))
|
|
return true;
|
|
|
|
// Under unsafe-math, evaluate calls if possible.
|
|
// According to Brian Sumner, we can do this for all f32 function calls
|
|
// using host's double function calls.
|
|
if (isUnsafeMath(CI) && evaluateCall(CI, FInfo))
|
|
return true;
|
|
|
|
// Specilized optimizations for each function call
|
|
switch (FInfo.getId()) {
|
|
case AMDGPULibFunc::EI_RECIP:
|
|
// skip vector function
|
|
assert ((FInfo.getPrefix() == AMDGPULibFunc::NATIVE ||
|
|
FInfo.getPrefix() == AMDGPULibFunc::HALF) &&
|
|
"recip must be an either native or half function");
|
|
return (getVecSize(FInfo) != 1) ? false : fold_recip(CI, B, FInfo);
|
|
|
|
case AMDGPULibFunc::EI_DIVIDE:
|
|
// skip vector function
|
|
assert ((FInfo.getPrefix() == AMDGPULibFunc::NATIVE ||
|
|
FInfo.getPrefix() == AMDGPULibFunc::HALF) &&
|
|
"divide must be an either native or half function");
|
|
return (getVecSize(FInfo) != 1) ? false : fold_divide(CI, B, FInfo);
|
|
|
|
case AMDGPULibFunc::EI_POW:
|
|
case AMDGPULibFunc::EI_POWR:
|
|
case AMDGPULibFunc::EI_POWN:
|
|
return fold_pow(CI, B, FInfo);
|
|
|
|
case AMDGPULibFunc::EI_ROOTN:
|
|
// skip vector function
|
|
return (getVecSize(FInfo) != 1) ? false : fold_rootn(CI, B, FInfo);
|
|
|
|
case AMDGPULibFunc::EI_FMA:
|
|
case AMDGPULibFunc::EI_MAD:
|
|
case AMDGPULibFunc::EI_NFMA:
|
|
// skip vector function
|
|
return (getVecSize(FInfo) != 1) ? false : fold_fma_mad(CI, B, FInfo);
|
|
|
|
case AMDGPULibFunc::EI_SQRT:
|
|
return isUnsafeMath(CI) && fold_sqrt(CI, B, FInfo);
|
|
case AMDGPULibFunc::EI_COS:
|
|
case AMDGPULibFunc::EI_SIN:
|
|
if ((getArgType(FInfo) == AMDGPULibFunc::F32 ||
|
|
getArgType(FInfo) == AMDGPULibFunc::F64)
|
|
&& (FInfo.getPrefix() == AMDGPULibFunc::NOPFX))
|
|
return fold_sincos(CI, B, AA);
|
|
|
|
break;
|
|
case AMDGPULibFunc::EI_READ_PIPE_2:
|
|
case AMDGPULibFunc::EI_READ_PIPE_4:
|
|
case AMDGPULibFunc::EI_WRITE_PIPE_2:
|
|
case AMDGPULibFunc::EI_WRITE_PIPE_4:
|
|
return fold_read_write_pipe(CI, B, FInfo);
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool AMDGPULibCalls::TDOFold(CallInst *CI, const FuncInfo &FInfo) {
|
|
// Table-Driven optimization
|
|
const TableRef tr = getOptTable(FInfo.getId());
|
|
if (tr.size==0)
|
|
return false;
|
|
|
|
int const sz = (int)tr.size;
|
|
const TableEntry * const ftbl = tr.table;
|
|
Value *opr0 = CI->getArgOperand(0);
|
|
|
|
if (getVecSize(FInfo) > 1) {
|
|
if (ConstantDataVector *CV = dyn_cast<ConstantDataVector>(opr0)) {
|
|
SmallVector<double, 0> DVal;
|
|
for (int eltNo = 0; eltNo < getVecSize(FInfo); ++eltNo) {
|
|
ConstantFP *eltval = dyn_cast<ConstantFP>(
|
|
CV->getElementAsConstant((unsigned)eltNo));
|
|
assert(eltval && "Non-FP arguments in math function!");
|
|
bool found = false;
|
|
for (int i=0; i < sz; ++i) {
|
|
if (eltval->isExactlyValue(ftbl[i].input)) {
|
|
DVal.push_back(ftbl[i].result);
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!found) {
|
|
// This vector constants not handled yet.
|
|
return false;
|
|
}
|
|
}
|
|
LLVMContext &context = CI->getParent()->getParent()->getContext();
|
|
Constant *nval;
|
|
if (getArgType(FInfo) == AMDGPULibFunc::F32) {
|
|
SmallVector<float, 0> FVal;
|
|
for (unsigned i = 0; i < DVal.size(); ++i) {
|
|
FVal.push_back((float)DVal[i]);
|
|
}
|
|
ArrayRef<float> tmp(FVal);
|
|
nval = ConstantDataVector::get(context, tmp);
|
|
} else { // F64
|
|
ArrayRef<double> tmp(DVal);
|
|
nval = ConstantDataVector::get(context, tmp);
|
|
}
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
} else {
|
|
// Scalar version
|
|
if (ConstantFP *CF = dyn_cast<ConstantFP>(opr0)) {
|
|
for (int i = 0; i < sz; ++i) {
|
|
if (CF->isExactlyValue(ftbl[i].input)) {
|
|
Value *nval = ConstantFP::get(CF->getType(), ftbl[i].result);
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool AMDGPULibCalls::replaceWithNative(CallInst *CI, const FuncInfo &FInfo) {
|
|
Module *M = CI->getModule();
|
|
if (getArgType(FInfo) != AMDGPULibFunc::F32 ||
|
|
FInfo.getPrefix() != AMDGPULibFunc::NOPFX ||
|
|
!HasNative(FInfo.getId()))
|
|
return false;
|
|
|
|
AMDGPULibFunc nf = FInfo;
|
|
nf.setPrefix(AMDGPULibFunc::NATIVE);
|
|
if (Constant *FPExpr = getFunction(M, nf)) {
|
|
LLVM_DEBUG(dbgs() << "AMDIC: " << *CI << " ---> ");
|
|
|
|
CI->setCalledFunction(FPExpr);
|
|
|
|
LLVM_DEBUG(dbgs() << *CI << '\n');
|
|
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// [native_]half_recip(c) ==> 1.0/c
|
|
bool AMDGPULibCalls::fold_recip(CallInst *CI, IRBuilder<> &B,
|
|
const FuncInfo &FInfo) {
|
|
Value *opr0 = CI->getArgOperand(0);
|
|
if (ConstantFP *CF = dyn_cast<ConstantFP>(opr0)) {
|
|
// Just create a normal div. Later, InstCombine will be able
|
|
// to compute the divide into a constant (avoid check float infinity
|
|
// or subnormal at this point).
|
|
Value *nval = B.CreateFDiv(ConstantFP::get(CF->getType(), 1.0),
|
|
opr0,
|
|
"recip2div");
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *nval << "\n");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// [native_]half_divide(x, c) ==> x/c
|
|
bool AMDGPULibCalls::fold_divide(CallInst *CI, IRBuilder<> &B,
|
|
const FuncInfo &FInfo) {
|
|
Value *opr0 = CI->getArgOperand(0);
|
|
Value *opr1 = CI->getArgOperand(1);
|
|
ConstantFP *CF0 = dyn_cast<ConstantFP>(opr0);
|
|
ConstantFP *CF1 = dyn_cast<ConstantFP>(opr1);
|
|
|
|
if ((CF0 && CF1) || // both are constants
|
|
(CF1 && (getArgType(FInfo) == AMDGPULibFunc::F32)))
|
|
// CF1 is constant && f32 divide
|
|
{
|
|
Value *nval1 = B.CreateFDiv(ConstantFP::get(opr1->getType(), 1.0),
|
|
opr1, "__div2recip");
|
|
Value *nval = B.CreateFMul(opr0, nval1, "__div2mul");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
namespace llvm {
|
|
static double log2(double V) {
|
|
#if _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
|
|
return ::log2(V);
|
|
#else
|
|
return log(V) / 0.693147180559945309417;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
bool AMDGPULibCalls::fold_pow(CallInst *CI, IRBuilder<> &B,
|
|
const FuncInfo &FInfo) {
|
|
assert((FInfo.getId() == AMDGPULibFunc::EI_POW ||
|
|
FInfo.getId() == AMDGPULibFunc::EI_POWR ||
|
|
FInfo.getId() == AMDGPULibFunc::EI_POWN) &&
|
|
"fold_pow: encounter a wrong function call");
|
|
|
|
Value *opr0, *opr1;
|
|
ConstantFP *CF;
|
|
ConstantInt *CINT;
|
|
ConstantAggregateZero *CZero;
|
|
Type *eltType;
|
|
|
|
opr0 = CI->getArgOperand(0);
|
|
opr1 = CI->getArgOperand(1);
|
|
CZero = dyn_cast<ConstantAggregateZero>(opr1);
|
|
if (getVecSize(FInfo) == 1) {
|
|
eltType = opr0->getType();
|
|
CF = dyn_cast<ConstantFP>(opr1);
|
|
CINT = dyn_cast<ConstantInt>(opr1);
|
|
} else {
|
|
VectorType *VTy = dyn_cast<VectorType>(opr0->getType());
|
|
assert(VTy && "Oprand of vector function should be of vectortype");
|
|
eltType = VTy->getElementType();
|
|
ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(opr1);
|
|
|
|
// Now, only Handle vector const whose elements have the same value.
|
|
CF = CDV ? dyn_cast_or_null<ConstantFP>(CDV->getSplatValue()) : nullptr;
|
|
CINT = CDV ? dyn_cast_or_null<ConstantInt>(CDV->getSplatValue()) : nullptr;
|
|
}
|
|
|
|
// No unsafe math , no constant argument, do nothing
|
|
if (!isUnsafeMath(CI) && !CF && !CINT && !CZero)
|
|
return false;
|
|
|
|
// 0x1111111 means that we don't do anything for this call.
|
|
int ci_opr1 = (CINT ? (int)CINT->getSExtValue() : 0x1111111);
|
|
|
|
if ((CF && CF->isZero()) || (CINT && ci_opr1 == 0) || CZero) {
|
|
// pow/powr/pown(x, 0) == 1
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> 1\n");
|
|
Constant *cnval = ConstantFP::get(eltType, 1.0);
|
|
if (getVecSize(FInfo) > 1) {
|
|
cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
|
|
}
|
|
replaceCall(cnval);
|
|
return true;
|
|
}
|
|
if ((CF && CF->isExactlyValue(1.0)) || (CINT && ci_opr1 == 1)) {
|
|
// pow/powr/pown(x, 1.0) = x
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << "\n");
|
|
replaceCall(opr0);
|
|
return true;
|
|
}
|
|
if ((CF && CF->isExactlyValue(2.0)) || (CINT && ci_opr1 == 2)) {
|
|
// pow/powr/pown(x, 2.0) = x*x
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << " * " << *opr0
|
|
<< "\n");
|
|
Value *nval = B.CreateFMul(opr0, opr0, "__pow2");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
if ((CF && CF->isExactlyValue(-1.0)) || (CINT && ci_opr1 == -1)) {
|
|
// pow/powr/pown(x, -1.0) = 1.0/x
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> 1 / " << *opr0 << "\n");
|
|
Constant *cnval = ConstantFP::get(eltType, 1.0);
|
|
if (getVecSize(FInfo) > 1) {
|
|
cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
|
|
}
|
|
Value *nval = B.CreateFDiv(cnval, opr0, "__powrecip");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
|
|
Module *M = CI->getModule();
|
|
if (CF && (CF->isExactlyValue(0.5) || CF->isExactlyValue(-0.5))) {
|
|
// pow[r](x, [-]0.5) = sqrt(x)
|
|
bool issqrt = CF->isExactlyValue(0.5);
|
|
if (Constant *FPExpr = getFunction(M,
|
|
AMDGPULibFunc(issqrt ? AMDGPULibFunc::EI_SQRT
|
|
: AMDGPULibFunc::EI_RSQRT, FInfo))) {
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "
|
|
<< FInfo.getName().c_str() << "(" << *opr0 << ")\n");
|
|
Value *nval = CreateCallEx(B,FPExpr, opr0, issqrt ? "__pow2sqrt"
|
|
: "__pow2rsqrt");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (!isUnsafeMath(CI))
|
|
return false;
|
|
|
|
// Unsafe Math optimization
|
|
|
|
// Remember that ci_opr1 is set if opr1 is integral
|
|
if (CF) {
|
|
double dval = (getArgType(FInfo) == AMDGPULibFunc::F32)
|
|
? (double)CF->getValueAPF().convertToFloat()
|
|
: CF->getValueAPF().convertToDouble();
|
|
int ival = (int)dval;
|
|
if ((double)ival == dval) {
|
|
ci_opr1 = ival;
|
|
} else
|
|
ci_opr1 = 0x11111111;
|
|
}
|
|
|
|
// pow/powr/pown(x, c) = [1/](x*x*..x); where
|
|
// trunc(c) == c && the number of x == c && |c| <= 12
|
|
unsigned abs_opr1 = (ci_opr1 < 0) ? -ci_opr1 : ci_opr1;
|
|
if (abs_opr1 <= 12) {
|
|
Constant *cnval;
|
|
Value *nval;
|
|
if (abs_opr1 == 0) {
|
|
cnval = ConstantFP::get(eltType, 1.0);
|
|
if (getVecSize(FInfo) > 1) {
|
|
cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
|
|
}
|
|
nval = cnval;
|
|
} else {
|
|
Value *valx2 = nullptr;
|
|
nval = nullptr;
|
|
while (abs_opr1 > 0) {
|
|
valx2 = valx2 ? B.CreateFMul(valx2, valx2, "__powx2") : opr0;
|
|
if (abs_opr1 & 1) {
|
|
nval = nval ? B.CreateFMul(nval, valx2, "__powprod") : valx2;
|
|
}
|
|
abs_opr1 >>= 1;
|
|
}
|
|
}
|
|
|
|
if (ci_opr1 < 0) {
|
|
cnval = ConstantFP::get(eltType, 1.0);
|
|
if (getVecSize(FInfo) > 1) {
|
|
cnval = ConstantDataVector::getSplat(getVecSize(FInfo), cnval);
|
|
}
|
|
nval = B.CreateFDiv(cnval, nval, "__1powprod");
|
|
}
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "
|
|
<< ((ci_opr1 < 0) ? "1/prod(" : "prod(") << *opr0
|
|
<< ")\n");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
|
|
// powr ---> exp2(y * log2(x))
|
|
// pown/pow ---> powr(fabs(x), y) | (x & ((int)y << 31))
|
|
Constant *ExpExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_EXP2,
|
|
FInfo));
|
|
if (!ExpExpr)
|
|
return false;
|
|
|
|
bool needlog = false;
|
|
bool needabs = false;
|
|
bool needcopysign = false;
|
|
Constant *cnval = nullptr;
|
|
if (getVecSize(FInfo) == 1) {
|
|
CF = dyn_cast<ConstantFP>(opr0);
|
|
|
|
if (CF) {
|
|
double V = (getArgType(FInfo) == AMDGPULibFunc::F32)
|
|
? (double)CF->getValueAPF().convertToFloat()
|
|
: CF->getValueAPF().convertToDouble();
|
|
|
|
V = log2(std::abs(V));
|
|
cnval = ConstantFP::get(eltType, V);
|
|
needcopysign = (FInfo.getId() != AMDGPULibFunc::EI_POWR) &&
|
|
CF->isNegative();
|
|
} else {
|
|
needlog = true;
|
|
needcopysign = needabs = FInfo.getId() != AMDGPULibFunc::EI_POWR &&
|
|
(!CF || CF->isNegative());
|
|
}
|
|
} else {
|
|
ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(opr0);
|
|
|
|
if (!CDV) {
|
|
needlog = true;
|
|
needcopysign = needabs = FInfo.getId() != AMDGPULibFunc::EI_POWR;
|
|
} else {
|
|
assert ((int)CDV->getNumElements() == getVecSize(FInfo) &&
|
|
"Wrong vector size detected");
|
|
|
|
SmallVector<double, 0> DVal;
|
|
for (int i=0; i < getVecSize(FInfo); ++i) {
|
|
double V = (getArgType(FInfo) == AMDGPULibFunc::F32)
|
|
? (double)CDV->getElementAsFloat(i)
|
|
: CDV->getElementAsDouble(i);
|
|
if (V < 0.0) needcopysign = true;
|
|
V = log2(std::abs(V));
|
|
DVal.push_back(V);
|
|
}
|
|
if (getArgType(FInfo) == AMDGPULibFunc::F32) {
|
|
SmallVector<float, 0> FVal;
|
|
for (unsigned i=0; i < DVal.size(); ++i) {
|
|
FVal.push_back((float)DVal[i]);
|
|
}
|
|
ArrayRef<float> tmp(FVal);
|
|
cnval = ConstantDataVector::get(M->getContext(), tmp);
|
|
} else {
|
|
ArrayRef<double> tmp(DVal);
|
|
cnval = ConstantDataVector::get(M->getContext(), tmp);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (needcopysign && (FInfo.getId() == AMDGPULibFunc::EI_POW)) {
|
|
// We cannot handle corner cases for a general pow() function, give up
|
|
// unless y is a constant integral value. Then proceed as if it were pown.
|
|
if (getVecSize(FInfo) == 1) {
|
|
if (const ConstantFP *CF = dyn_cast<ConstantFP>(opr1)) {
|
|
double y = (getArgType(FInfo) == AMDGPULibFunc::F32)
|
|
? (double)CF->getValueAPF().convertToFloat()
|
|
: CF->getValueAPF().convertToDouble();
|
|
if (y != (double)(int64_t)y)
|
|
return false;
|
|
} else
|
|
return false;
|
|
} else {
|
|
if (const ConstantDataVector *CDV = dyn_cast<ConstantDataVector>(opr1)) {
|
|
for (int i=0; i < getVecSize(FInfo); ++i) {
|
|
double y = (getArgType(FInfo) == AMDGPULibFunc::F32)
|
|
? (double)CDV->getElementAsFloat(i)
|
|
: CDV->getElementAsDouble(i);
|
|
if (y != (double)(int64_t)y)
|
|
return false;
|
|
}
|
|
} else
|
|
return false;
|
|
}
|
|
}
|
|
|
|
Value *nval;
|
|
if (needabs) {
|
|
Constant *AbsExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_FABS,
|
|
FInfo));
|
|
if (!AbsExpr)
|
|
return false;
|
|
nval = CreateCallEx(B, AbsExpr, opr0, "__fabs");
|
|
} else {
|
|
nval = cnval ? cnval : opr0;
|
|
}
|
|
if (needlog) {
|
|
Constant *LogExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_LOG2,
|
|
FInfo));
|
|
if (!LogExpr)
|
|
return false;
|
|
nval = CreateCallEx(B,LogExpr, nval, "__log2");
|
|
}
|
|
|
|
if (FInfo.getId() == AMDGPULibFunc::EI_POWN) {
|
|
// convert int(32) to fp(f32 or f64)
|
|
opr1 = B.CreateSIToFP(opr1, nval->getType(), "pownI2F");
|
|
}
|
|
nval = B.CreateFMul(opr1, nval, "__ylogx");
|
|
nval = CreateCallEx(B,ExpExpr, nval, "__exp2");
|
|
|
|
if (needcopysign) {
|
|
Value *opr_n;
|
|
Type* rTy = opr0->getType();
|
|
Type* nTyS = eltType->isDoubleTy() ? B.getInt64Ty() : B.getInt32Ty();
|
|
Type *nTy = nTyS;
|
|
if (const VectorType *vTy = dyn_cast<VectorType>(rTy))
|
|
nTy = VectorType::get(nTyS, vTy->getNumElements());
|
|
unsigned size = nTy->getScalarSizeInBits();
|
|
opr_n = CI->getArgOperand(1);
|
|
if (opr_n->getType()->isIntegerTy())
|
|
opr_n = B.CreateZExtOrBitCast(opr_n, nTy, "__ytou");
|
|
else
|
|
opr_n = B.CreateFPToSI(opr1, nTy, "__ytou");
|
|
|
|
Value *sign = B.CreateShl(opr_n, size-1, "__yeven");
|
|
sign = B.CreateAnd(B.CreateBitCast(opr0, nTy), sign, "__pow_sign");
|
|
nval = B.CreateOr(B.CreateBitCast(nval, nTy), sign);
|
|
nval = B.CreateBitCast(nval, opr0->getType());
|
|
}
|
|
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "
|
|
<< "exp2(" << *opr1 << " * log2(" << *opr0 << "))\n");
|
|
replaceCall(nval);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool AMDGPULibCalls::fold_rootn(CallInst *CI, IRBuilder<> &B,
|
|
const FuncInfo &FInfo) {
|
|
Value *opr0 = CI->getArgOperand(0);
|
|
Value *opr1 = CI->getArgOperand(1);
|
|
|
|
ConstantInt *CINT = dyn_cast<ConstantInt>(opr1);
|
|
if (!CINT) {
|
|
return false;
|
|
}
|
|
int ci_opr1 = (int)CINT->getSExtValue();
|
|
if (ci_opr1 == 1) { // rootn(x, 1) = x
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << "\n");
|
|
replaceCall(opr0);
|
|
return true;
|
|
}
|
|
if (ci_opr1 == 2) { // rootn(x, 2) = sqrt(x)
|
|
std::vector<const Type*> ParamsTys;
|
|
ParamsTys.push_back(opr0->getType());
|
|
Module *M = CI->getModule();
|
|
if (Constant *FPExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_SQRT,
|
|
FInfo))) {
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> sqrt(" << *opr0 << ")\n");
|
|
Value *nval = CreateCallEx(B,FPExpr, opr0, "__rootn2sqrt");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
} else if (ci_opr1 == 3) { // rootn(x, 3) = cbrt(x)
|
|
Module *M = CI->getModule();
|
|
if (Constant *FPExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_CBRT,
|
|
FInfo))) {
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> cbrt(" << *opr0 << ")\n");
|
|
Value *nval = CreateCallEx(B,FPExpr, opr0, "__rootn2cbrt");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
} else if (ci_opr1 == -1) { // rootn(x, -1) = 1.0/x
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> 1.0 / " << *opr0 << "\n");
|
|
Value *nval = B.CreateFDiv(ConstantFP::get(opr0->getType(), 1.0),
|
|
opr0,
|
|
"__rootn2div");
|
|
replaceCall(nval);
|
|
return true;
|
|
} else if (ci_opr1 == -2) { // rootn(x, -2) = rsqrt(x)
|
|
std::vector<const Type*> ParamsTys;
|
|
ParamsTys.push_back(opr0->getType());
|
|
Module *M = CI->getModule();
|
|
if (Constant *FPExpr = getFunction(M, AMDGPULibFunc(AMDGPULibFunc::EI_RSQRT,
|
|
FInfo))) {
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> rsqrt(" << *opr0
|
|
<< ")\n");
|
|
Value *nval = CreateCallEx(B,FPExpr, opr0, "__rootn2rsqrt");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool AMDGPULibCalls::fold_fma_mad(CallInst *CI, IRBuilder<> &B,
|
|
const FuncInfo &FInfo) {
|
|
Value *opr0 = CI->getArgOperand(0);
|
|
Value *opr1 = CI->getArgOperand(1);
|
|
Value *opr2 = CI->getArgOperand(2);
|
|
|
|
ConstantFP *CF0 = dyn_cast<ConstantFP>(opr0);
|
|
ConstantFP *CF1 = dyn_cast<ConstantFP>(opr1);
|
|
if ((CF0 && CF0->isZero()) || (CF1 && CF1->isZero())) {
|
|
// fma/mad(a, b, c) = c if a=0 || b=0
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr2 << "\n");
|
|
replaceCall(opr2);
|
|
return true;
|
|
}
|
|
if (CF0 && CF0->isExactlyValue(1.0f)) {
|
|
// fma/mad(a, b, c) = b+c if a=1
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr1 << " + " << *opr2
|
|
<< "\n");
|
|
Value *nval = B.CreateFAdd(opr1, opr2, "fmaadd");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
if (CF1 && CF1->isExactlyValue(1.0f)) {
|
|
// fma/mad(a, b, c) = a+c if b=1
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << " + " << *opr2
|
|
<< "\n");
|
|
Value *nval = B.CreateFAdd(opr0, opr2, "fmaadd");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
if (ConstantFP *CF = dyn_cast<ConstantFP>(opr2)) {
|
|
if (CF->isZero()) {
|
|
// fma/mad(a, b, c) = a*b if c=0
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> " << *opr0 << " * "
|
|
<< *opr1 << "\n");
|
|
Value *nval = B.CreateFMul(opr0, opr1, "fmamul");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
// Get a scalar native builtin signle argument FP function
|
|
Constant* AMDGPULibCalls::getNativeFunction(Module* M, const FuncInfo& FInfo) {
|
|
if (getArgType(FInfo) == AMDGPULibFunc::F64 || !HasNative(FInfo.getId()))
|
|
return nullptr;
|
|
FuncInfo nf = FInfo;
|
|
nf.setPrefix(AMDGPULibFunc::NATIVE);
|
|
return getFunction(M, nf);
|
|
}
|
|
|
|
// fold sqrt -> native_sqrt (x)
|
|
bool AMDGPULibCalls::fold_sqrt(CallInst *CI, IRBuilder<> &B,
|
|
const FuncInfo &FInfo) {
|
|
if (getArgType(FInfo) == AMDGPULibFunc::F32 && (getVecSize(FInfo) == 1) &&
|
|
(FInfo.getPrefix() != AMDGPULibFunc::NATIVE)) {
|
|
if (Constant *FPExpr = getNativeFunction(
|
|
CI->getModule(), AMDGPULibFunc(AMDGPULibFunc::EI_SQRT, FInfo))) {
|
|
Value *opr0 = CI->getArgOperand(0);
|
|
LLVM_DEBUG(errs() << "AMDIC: " << *CI << " ---> "
|
|
<< "sqrt(" << *opr0 << ")\n");
|
|
Value *nval = CreateCallEx(B,FPExpr, opr0, "__sqrt");
|
|
replaceCall(nval);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// fold sin, cos -> sincos.
|
|
bool AMDGPULibCalls::fold_sincos(CallInst *CI, IRBuilder<> &B,
|
|
AliasAnalysis *AA) {
|
|
AMDGPULibFunc fInfo;
|
|
if (!AMDGPULibFunc::parse(CI->getCalledFunction()->getName(), fInfo))
|
|
return false;
|
|
|
|
assert(fInfo.getId() == AMDGPULibFunc::EI_SIN ||
|
|
fInfo.getId() == AMDGPULibFunc::EI_COS);
|
|
bool const isSin = fInfo.getId() == AMDGPULibFunc::EI_SIN;
|
|
|
|
Value *CArgVal = CI->getArgOperand(0);
|
|
BasicBlock * const CBB = CI->getParent();
|
|
|
|
int const MaxScan = 30;
|
|
|
|
{ // fold in load value.
|
|
LoadInst *LI = dyn_cast<LoadInst>(CArgVal);
|
|
if (LI && LI->getParent() == CBB) {
|
|
BasicBlock::iterator BBI = LI->getIterator();
|
|
Value *AvailableVal = FindAvailableLoadedValue(LI, CBB, BBI, MaxScan, AA);
|
|
if (AvailableVal) {
|
|
CArgVal->replaceAllUsesWith(AvailableVal);
|
|
if (CArgVal->getNumUses() == 0)
|
|
LI->eraseFromParent();
|
|
CArgVal = CI->getArgOperand(0);
|
|
}
|
|
}
|
|
}
|
|
|
|
Module *M = CI->getModule();
|
|
fInfo.setId(isSin ? AMDGPULibFunc::EI_COS : AMDGPULibFunc::EI_SIN);
|
|
std::string const PairName = fInfo.mangle();
|
|
|
|
CallInst *UI = nullptr;
|
|
for (User* U : CArgVal->users()) {
|
|
CallInst *XI = dyn_cast_or_null<CallInst>(U);
|
|
if (!XI || XI == CI || XI->getParent() != CBB)
|
|
continue;
|
|
|
|
Function *UCallee = XI->getCalledFunction();
|
|
if (!UCallee || !UCallee->getName().equals(PairName))
|
|
continue;
|
|
|
|
BasicBlock::iterator BBI = CI->getIterator();
|
|
if (BBI == CI->getParent()->begin())
|
|
break;
|
|
--BBI;
|
|
for (int I = MaxScan; I > 0 && BBI != CBB->begin(); --BBI, --I) {
|
|
if (cast<Instruction>(BBI) == XI) {
|
|
UI = XI;
|
|
break;
|
|
}
|
|
}
|
|
if (UI) break;
|
|
}
|
|
|
|
if (!UI) return false;
|
|
|
|
// Merge the sin and cos.
|
|
|
|
// for OpenCL 2.0 we have only generic implementation of sincos
|
|
// function.
|
|
AMDGPULibFunc nf(AMDGPULibFunc::EI_SINCOS, fInfo);
|
|
const AMDGPUAS AS = AMDGPU::getAMDGPUAS(*M);
|
|
nf.getLeads()[0].PtrKind = AMDGPULibFunc::getEPtrKindFromAddrSpace(AS.FLAT_ADDRESS);
|
|
Function *Fsincos = dyn_cast_or_null<Function>(getFunction(M, nf));
|
|
if (!Fsincos) return false;
|
|
|
|
BasicBlock::iterator ItOld = B.GetInsertPoint();
|
|
AllocaInst *Alloc = insertAlloca(UI, B, "__sincos_");
|
|
B.SetInsertPoint(UI);
|
|
|
|
Value *P = Alloc;
|
|
Type *PTy = Fsincos->getFunctionType()->getParamType(1);
|
|
// The allocaInst allocates the memory in private address space. This need
|
|
// to be bitcasted to point to the address space of cos pointer type.
|
|
// In OpenCL 2.0 this is generic, while in 1.2 that is private.
|
|
if (PTy->getPointerAddressSpace() != AS.PRIVATE_ADDRESS)
|
|
P = B.CreateAddrSpaceCast(Alloc, PTy);
|
|
CallInst *Call = CreateCallEx2(B, Fsincos, UI->getArgOperand(0), P);
|
|
|
|
LLVM_DEBUG(errs() << "AMDIC: fold_sincos (" << *CI << ", " << *UI << ") with "
|
|
<< *Call << "\n");
|
|
|
|
if (!isSin) { // CI->cos, UI->sin
|
|
B.SetInsertPoint(&*ItOld);
|
|
UI->replaceAllUsesWith(&*Call);
|
|
Instruction *Reload = B.CreateLoad(Alloc);
|
|
CI->replaceAllUsesWith(Reload);
|
|
UI->eraseFromParent();
|
|
CI->eraseFromParent();
|
|
} else { // CI->sin, UI->cos
|
|
Instruction *Reload = B.CreateLoad(Alloc);
|
|
UI->replaceAllUsesWith(Reload);
|
|
CI->replaceAllUsesWith(Call);
|
|
UI->eraseFromParent();
|
|
CI->eraseFromParent();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// Get insertion point at entry.
|
|
BasicBlock::iterator AMDGPULibCalls::getEntryIns(CallInst * UI) {
|
|
Function * Func = UI->getParent()->getParent();
|
|
BasicBlock * BB = &Func->getEntryBlock();
|
|
assert(BB && "Entry block not found!");
|
|
BasicBlock::iterator ItNew = BB->begin();
|
|
return ItNew;
|
|
}
|
|
|
|
// Insert a AllocsInst at the beginning of function entry block.
|
|
AllocaInst* AMDGPULibCalls::insertAlloca(CallInst *UI, IRBuilder<> &B,
|
|
const char *prefix) {
|
|
BasicBlock::iterator ItNew = getEntryIns(UI);
|
|
Function *UCallee = UI->getCalledFunction();
|
|
Type *RetType = UCallee->getReturnType();
|
|
B.SetInsertPoint(&*ItNew);
|
|
AllocaInst *Alloc = B.CreateAlloca(RetType, 0,
|
|
std::string(prefix) + UI->getName());
|
|
Alloc->setAlignment(UCallee->getParent()->getDataLayout()
|
|
.getTypeAllocSize(RetType));
|
|
return Alloc;
|
|
}
|
|
|
|
bool AMDGPULibCalls::evaluateScalarMathFunc(FuncInfo &FInfo,
|
|
double& Res0, double& Res1,
|
|
Constant *copr0, Constant *copr1,
|
|
Constant *copr2) {
|
|
// By default, opr0/opr1/opr3 holds values of float/double type.
|
|
// If they are not float/double, each function has to its
|
|
// operand separately.
|
|
double opr0=0.0, opr1=0.0, opr2=0.0;
|
|
ConstantFP *fpopr0 = dyn_cast_or_null<ConstantFP>(copr0);
|
|
ConstantFP *fpopr1 = dyn_cast_or_null<ConstantFP>(copr1);
|
|
ConstantFP *fpopr2 = dyn_cast_or_null<ConstantFP>(copr2);
|
|
if (fpopr0) {
|
|
opr0 = (getArgType(FInfo) == AMDGPULibFunc::F64)
|
|
? fpopr0->getValueAPF().convertToDouble()
|
|
: (double)fpopr0->getValueAPF().convertToFloat();
|
|
}
|
|
|
|
if (fpopr1) {
|
|
opr1 = (getArgType(FInfo) == AMDGPULibFunc::F64)
|
|
? fpopr1->getValueAPF().convertToDouble()
|
|
: (double)fpopr1->getValueAPF().convertToFloat();
|
|
}
|
|
|
|
if (fpopr2) {
|
|
opr2 = (getArgType(FInfo) == AMDGPULibFunc::F64)
|
|
? fpopr2->getValueAPF().convertToDouble()
|
|
: (double)fpopr2->getValueAPF().convertToFloat();
|
|
}
|
|
|
|
switch (FInfo.getId()) {
|
|
default : return false;
|
|
|
|
case AMDGPULibFunc::EI_ACOS:
|
|
Res0 = acos(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_ACOSH:
|
|
// acosh(x) == log(x + sqrt(x*x - 1))
|
|
Res0 = log(opr0 + sqrt(opr0*opr0 - 1.0));
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_ACOSPI:
|
|
Res0 = acos(opr0) / MATH_PI;
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_ASIN:
|
|
Res0 = asin(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_ASINH:
|
|
// asinh(x) == log(x + sqrt(x*x + 1))
|
|
Res0 = log(opr0 + sqrt(opr0*opr0 + 1.0));
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_ASINPI:
|
|
Res0 = asin(opr0) / MATH_PI;
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_ATAN:
|
|
Res0 = atan(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_ATANH:
|
|
// atanh(x) == (log(x+1) - log(x-1))/2;
|
|
Res0 = (log(opr0 + 1.0) - log(opr0 - 1.0))/2.0;
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_ATANPI:
|
|
Res0 = atan(opr0) / MATH_PI;
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_CBRT:
|
|
Res0 = (opr0 < 0.0) ? -pow(-opr0, 1.0/3.0) : pow(opr0, 1.0/3.0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_COS:
|
|
Res0 = cos(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_COSH:
|
|
Res0 = cosh(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_COSPI:
|
|
Res0 = cos(MATH_PI * opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_EXP:
|
|
Res0 = exp(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_EXP2:
|
|
Res0 = pow(2.0, opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_EXP10:
|
|
Res0 = pow(10.0, opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_EXPM1:
|
|
Res0 = exp(opr0) - 1.0;
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_LOG:
|
|
Res0 = log(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_LOG2:
|
|
Res0 = log(opr0) / log(2.0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_LOG10:
|
|
Res0 = log(opr0) / log(10.0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_RSQRT:
|
|
Res0 = 1.0 / sqrt(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_SIN:
|
|
Res0 = sin(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_SINH:
|
|
Res0 = sinh(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_SINPI:
|
|
Res0 = sin(MATH_PI * opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_SQRT:
|
|
Res0 = sqrt(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_TAN:
|
|
Res0 = tan(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_TANH:
|
|
Res0 = tanh(opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_TANPI:
|
|
Res0 = tan(MATH_PI * opr0);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_RECIP:
|
|
Res0 = 1.0 / opr0;
|
|
return true;
|
|
|
|
// two-arg functions
|
|
case AMDGPULibFunc::EI_DIVIDE:
|
|
Res0 = opr0 / opr1;
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_POW:
|
|
case AMDGPULibFunc::EI_POWR:
|
|
Res0 = pow(opr0, opr1);
|
|
return true;
|
|
|
|
case AMDGPULibFunc::EI_POWN: {
|
|
if (ConstantInt *iopr1 = dyn_cast_or_null<ConstantInt>(copr1)) {
|
|
double val = (double)iopr1->getSExtValue();
|
|
Res0 = pow(opr0, val);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
case AMDGPULibFunc::EI_ROOTN: {
|
|
if (ConstantInt *iopr1 = dyn_cast_or_null<ConstantInt>(copr1)) {
|
|
double val = (double)iopr1->getSExtValue();
|
|
Res0 = pow(opr0, 1.0 / val);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// with ptr arg
|
|
case AMDGPULibFunc::EI_SINCOS:
|
|
Res0 = sin(opr0);
|
|
Res1 = cos(opr0);
|
|
return true;
|
|
|
|
// three-arg functions
|
|
case AMDGPULibFunc::EI_FMA:
|
|
case AMDGPULibFunc::EI_MAD:
|
|
Res0 = opr0 * opr1 + opr2;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool AMDGPULibCalls::evaluateCall(CallInst *aCI, FuncInfo &FInfo) {
|
|
int numArgs = (int)aCI->getNumArgOperands();
|
|
if (numArgs > 3)
|
|
return false;
|
|
|
|
Constant *copr0 = nullptr;
|
|
Constant *copr1 = nullptr;
|
|
Constant *copr2 = nullptr;
|
|
if (numArgs > 0) {
|
|
if ((copr0 = dyn_cast<Constant>(aCI->getArgOperand(0))) == nullptr)
|
|
return false;
|
|
}
|
|
|
|
if (numArgs > 1) {
|
|
if ((copr1 = dyn_cast<Constant>(aCI->getArgOperand(1))) == nullptr) {
|
|
if (FInfo.getId() != AMDGPULibFunc::EI_SINCOS)
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (numArgs > 2) {
|
|
if ((copr2 = dyn_cast<Constant>(aCI->getArgOperand(2))) == nullptr)
|
|
return false;
|
|
}
|
|
|
|
// At this point, all arguments to aCI are constants.
|
|
|
|
// max vector size is 16, and sincos will generate two results.
|
|
double DVal0[16], DVal1[16];
|
|
bool hasTwoResults = (FInfo.getId() == AMDGPULibFunc::EI_SINCOS);
|
|
if (getVecSize(FInfo) == 1) {
|
|
if (!evaluateScalarMathFunc(FInfo, DVal0[0],
|
|
DVal1[0], copr0, copr1, copr2)) {
|
|
return false;
|
|
}
|
|
} else {
|
|
ConstantDataVector *CDV0 = dyn_cast_or_null<ConstantDataVector>(copr0);
|
|
ConstantDataVector *CDV1 = dyn_cast_or_null<ConstantDataVector>(copr1);
|
|
ConstantDataVector *CDV2 = dyn_cast_or_null<ConstantDataVector>(copr2);
|
|
for (int i=0; i < getVecSize(FInfo); ++i) {
|
|
Constant *celt0 = CDV0 ? CDV0->getElementAsConstant(i) : nullptr;
|
|
Constant *celt1 = CDV1 ? CDV1->getElementAsConstant(i) : nullptr;
|
|
Constant *celt2 = CDV2 ? CDV2->getElementAsConstant(i) : nullptr;
|
|
if (!evaluateScalarMathFunc(FInfo, DVal0[i],
|
|
DVal1[i], celt0, celt1, celt2)) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
LLVMContext &context = CI->getParent()->getParent()->getContext();
|
|
Constant *nval0, *nval1;
|
|
if (getVecSize(FInfo) == 1) {
|
|
nval0 = ConstantFP::get(CI->getType(), DVal0[0]);
|
|
if (hasTwoResults)
|
|
nval1 = ConstantFP::get(CI->getType(), DVal1[0]);
|
|
} else {
|
|
if (getArgType(FInfo) == AMDGPULibFunc::F32) {
|
|
SmallVector <float, 0> FVal0, FVal1;
|
|
for (int i=0; i < getVecSize(FInfo); ++i)
|
|
FVal0.push_back((float)DVal0[i]);
|
|
ArrayRef<float> tmp0(FVal0);
|
|
nval0 = ConstantDataVector::get(context, tmp0);
|
|
if (hasTwoResults) {
|
|
for (int i=0; i < getVecSize(FInfo); ++i)
|
|
FVal1.push_back((float)DVal1[i]);
|
|
ArrayRef<float> tmp1(FVal1);
|
|
nval1 = ConstantDataVector::get(context, tmp1);
|
|
}
|
|
} else {
|
|
ArrayRef<double> tmp0(DVal0);
|
|
nval0 = ConstantDataVector::get(context, tmp0);
|
|
if (hasTwoResults) {
|
|
ArrayRef<double> tmp1(DVal1);
|
|
nval1 = ConstantDataVector::get(context, tmp1);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (hasTwoResults) {
|
|
// sincos
|
|
assert(FInfo.getId() == AMDGPULibFunc::EI_SINCOS &&
|
|
"math function with ptr arg not supported yet");
|
|
new StoreInst(nval1, aCI->getArgOperand(1), aCI);
|
|
}
|
|
|
|
replaceCall(nval0);
|
|
return true;
|
|
}
|
|
|
|
// Public interface to the Simplify LibCalls pass.
|
|
FunctionPass *llvm::createAMDGPUSimplifyLibCallsPass(const TargetOptions &Opt) {
|
|
return new AMDGPUSimplifyLibCalls(Opt);
|
|
}
|
|
|
|
FunctionPass *llvm::createAMDGPUUseNativeCallsPass() {
|
|
return new AMDGPUUseNativeCalls();
|
|
}
|
|
|
|
static bool setFastFlags(Function &F, const TargetOptions &Options) {
|
|
AttrBuilder B;
|
|
|
|
if (Options.UnsafeFPMath || Options.NoInfsFPMath)
|
|
B.addAttribute("no-infs-fp-math", "true");
|
|
if (Options.UnsafeFPMath || Options.NoNaNsFPMath)
|
|
B.addAttribute("no-nans-fp-math", "true");
|
|
if (Options.UnsafeFPMath) {
|
|
B.addAttribute("less-precise-fpmad", "true");
|
|
B.addAttribute("unsafe-fp-math", "true");
|
|
}
|
|
|
|
if (!B.hasAttributes())
|
|
return false;
|
|
|
|
F.addAttributes(AttributeList::FunctionIndex, B);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool AMDGPUSimplifyLibCalls::runOnFunction(Function &F) {
|
|
if (skipFunction(F))
|
|
return false;
|
|
|
|
bool Changed = false;
|
|
auto AA = &getAnalysis<AAResultsWrapperPass>().getAAResults();
|
|
|
|
LLVM_DEBUG(dbgs() << "AMDIC: process function ";
|
|
F.printAsOperand(dbgs(), false, F.getParent()); dbgs() << '\n';);
|
|
|
|
if (!EnablePreLink)
|
|
Changed |= setFastFlags(F, Options);
|
|
|
|
for (auto &BB : F) {
|
|
for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ) {
|
|
// Ignore non-calls.
|
|
CallInst *CI = dyn_cast<CallInst>(I);
|
|
++I;
|
|
if (!CI) continue;
|
|
|
|
// Ignore indirect calls.
|
|
Function *Callee = CI->getCalledFunction();
|
|
if (Callee == 0) continue;
|
|
|
|
LLVM_DEBUG(dbgs() << "AMDIC: try folding " << *CI << "\n";
|
|
dbgs().flush());
|
|
if(Simplifier.fold(CI, AA))
|
|
Changed = true;
|
|
}
|
|
}
|
|
return Changed;
|
|
}
|
|
|
|
bool AMDGPUUseNativeCalls::runOnFunction(Function &F) {
|
|
if (skipFunction(F) || UseNative.empty())
|
|
return false;
|
|
|
|
bool Changed = false;
|
|
for (auto &BB : F) {
|
|
for (BasicBlock::iterator I = BB.begin(), E = BB.end(); I != E; ) {
|
|
// Ignore non-calls.
|
|
CallInst *CI = dyn_cast<CallInst>(I);
|
|
++I;
|
|
if (!CI) continue;
|
|
|
|
// Ignore indirect calls.
|
|
Function *Callee = CI->getCalledFunction();
|
|
if (Callee == 0) continue;
|
|
|
|
if(Simplifier.useNative(CI))
|
|
Changed = true;
|
|
}
|
|
}
|
|
return Changed;
|
|
}
|