1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
//===- 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
|
