mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-24 06:30:19 +00:00
dc18ebc4b1
When a call to a double-precision libm function has fast-math semantics (via function attribute for now because there is no IR-level FMF on calls), we can avoid fpext/fptrunc operations and use the float version of the call if the input and output are both float. We already do this optimization using a command-line option; this patch just adds the ability for fast-math to use the existing functionality. I moved the cl::opt from InstructionCombining into SimplifyLibCalls because it's only ever used internally to that class. Modified the existing test cases to use the unsafe-fp-math attribute rather than repeating all tests. This patch should solve: http://llvm.org/bugs/show_bug.cgi?id=17850 Differential Revision: http://reviews.llvm.org/D5893 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220390 91177308-0d34-0410-b5e6-96231b3b80d8
133 lines
5.5 KiB
C++
133 lines
5.5 KiB
C++
//===- SimplifyLibCalls.h - Library call simplifier -------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file exposes an interface to build some C language libcalls for
|
|
// optimization passes that need to call the various functions.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TRANSFORMS_UTILS_SIMPLIFYLIBCALLS_H
|
|
#define LLVM_TRANSFORMS_UTILS_SIMPLIFYLIBCALLS_H
|
|
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/IR/IRBuilder.h"
|
|
|
|
namespace llvm {
|
|
class Value;
|
|
class CallInst;
|
|
class DataLayout;
|
|
class Instruction;
|
|
class TargetLibraryInfo;
|
|
class BasicBlock;
|
|
class Function;
|
|
|
|
/// LibCallSimplifier - This class implements a collection of optimizations
|
|
/// that replace well formed calls to library functions with a more optimal
|
|
/// form. For example, replacing 'printf("Hello!")' with 'puts("Hello!")'.
|
|
class LibCallSimplifier {
|
|
private:
|
|
const DataLayout *DL;
|
|
const TargetLibraryInfo *TLI;
|
|
bool UnsafeFPShrink;
|
|
|
|
protected:
|
|
~LibCallSimplifier() {}
|
|
|
|
public:
|
|
LibCallSimplifier(const DataLayout *TD, const TargetLibraryInfo *TLI);
|
|
|
|
/// optimizeCall - Take the given call instruction and return a more
|
|
/// optimal value to replace the instruction with or 0 if a more
|
|
/// optimal form can't be found. Note that the returned value may
|
|
/// be equal to the instruction being optimized. In this case all
|
|
/// other instructions that use the given instruction were modified
|
|
/// and the given instruction is dead.
|
|
Value *optimizeCall(CallInst *CI);
|
|
|
|
/// replaceAllUsesWith - This method is used when the library call
|
|
/// simplifier needs to replace instructions other than the library
|
|
/// call being modified.
|
|
virtual void replaceAllUsesWith(Instruction *I, Value *With) const;
|
|
|
|
private:
|
|
// Fortified Library Call Optimizations
|
|
Value *optimizeMemCpyChk(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeMemMoveChk(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeMemSetChk(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrCpyChk(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStpCpyChk(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrNCpyChk(CallInst *CI, IRBuilder<> &B);
|
|
|
|
// String and Memory Library Call Optimizations
|
|
Value *optimizeStrCat(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrNCat(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrChr(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrRChr(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrCmp(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrNCmp(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrCpy(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStpCpy(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrNCpy(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrLen(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrPBrk(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrTo(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrSpn(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrCSpn(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeStrStr(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeMemCmp(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeMemCpy(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeMemMove(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeMemSet(CallInst *CI, IRBuilder<> &B);
|
|
|
|
// Math Library Optimizations
|
|
Value *optimizeUnaryDoubleFP(CallInst *CI, IRBuilder<> &B, bool CheckRetType);
|
|
Value *optimizeBinaryDoubleFP(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeCos(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizePow(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeExp2(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeFabs(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeSqrt(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeSinCosPi(CallInst *CI, IRBuilder<> &B);
|
|
|
|
// Integer Library Call Optimizations
|
|
Value *optimizeFFS(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeAbs(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeIsDigit(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeIsAscii(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeToAscii(CallInst *CI, IRBuilder<> &B);
|
|
|
|
// Formatting and IO Library Call Optimizations
|
|
Value *optimizeErrorReporting(CallInst *CI, IRBuilder<> &B,
|
|
int StreamArg = -1);
|
|
Value *optimizePrintF(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeSPrintF(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeFPrintF(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeFWrite(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeFPuts(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizePuts(CallInst *CI, IRBuilder<> &B);
|
|
|
|
// Helper methods
|
|
Value *emitStrLenMemCpy(Value *Src, Value *Dst, uint64_t Len, IRBuilder<> &B);
|
|
void classifyArgUse(Value *Val, BasicBlock *BB, bool IsFloat,
|
|
SmallVectorImpl<CallInst *> &SinCalls,
|
|
SmallVectorImpl<CallInst *> &CosCalls,
|
|
SmallVectorImpl<CallInst *> &SinCosCalls);
|
|
void replaceTrigInsts(SmallVectorImpl<CallInst *> &Calls, Value *Res);
|
|
Value *optimizePrintFString(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeSPrintFString(CallInst *CI, IRBuilder<> &B);
|
|
Value *optimizeFPrintFString(CallInst *CI, IRBuilder<> &B);
|
|
|
|
/// hasFloatVersion - Checks if there is a float version of the specified
|
|
/// function by checking for an existing function with name FuncName + f
|
|
bool hasFloatVersion(StringRef FuncName);
|
|
};
|
|
} // End llvm namespace
|
|
|
|
#endif
|