//
// This file implements a simple pass that applies a variety of small
// optimizations for calls to specific well-known function calls (e.g. runtime
-// library functions). For example, a call to the function "exit(3)" that
-// occurs within the main() function can be transformed into a simple "return 3"
-// instruction. Any optimization that takes this form (replace call to library
-// function with simpler code that provides the same result) belongs in this
-// file.
+// library functions). Any optimization that takes the very simple form
+// "replace call to library function with simpler code that provides the same
+// result" belongs in this file.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/STLExtras.h"
-#include "llvm/Support/Compiler.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Config/config.h"
/// This class is the abstract base class for the set of optimizations that
/// corresponds to one library call.
namespace {
-class VISIBILITY_HIDDEN LibCallOptimization {
+class LibCallOptimization {
protected:
Function *Caller;
const TargetData *TD;
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B)
=0;
- Value *OptimizeCall(CallInst *CI, const TargetData &TD, IRBuilder<> &B) {
+ Value *OptimizeCall(CallInst *CI, const TargetData *TD, IRBuilder<> &B) {
Caller = CI->getParent()->getParent();
- this->TD = &TD;
+ this->TD = TD;
if (CI->getCalledFunction())
Context = &CI->getCalledFunction()->getContext();
return CallOptimizer(CI->getCalledFunction(), CI, B);
/// 'floor'). This function is known to take a single of type matching 'Op'
/// and returns one value with the same type. If 'Op' is a long double, 'l'
/// is added as the suffix of name, if 'Op' is a float, we add a 'f' suffix.
- Value *EmitUnaryFloatFnCall(Value *Op, const char *Name, IRBuilder<> &B);
+ Value *EmitUnaryFloatFnCall(Value *Op, const char *Name, IRBuilder<> &B,
+ const AttrListPtr &Attrs);
/// EmitPutChar - Emit a call to the putchar function. This assumes that Char
/// is an integer.
/// CastToCStr - Return V if it is an i8*, otherwise cast it to i8*.
Value *LibCallOptimization::CastToCStr(Value *V, IRBuilder<> &B) {
return
- B.CreateBitCast(V, Context->getPointerTypeUnqual(Type::Int8Ty), "cstr");
+ B.CreateBitCast(V, PointerType::getUnqual(Type::getInt8Ty(*Context)), "cstr");
}
/// EmitStrLen - Emit a call to the strlen function to the builder, for the
Attribute::NoUnwind);
Constant *StrLen =M->getOrInsertFunction("strlen", AttrListPtr::get(AWI, 2),
- TD->getIntPtrType(),
- Context->getPointerTypeUnqual(Type::Int8Ty),
+ TD->getIntPtrType(*Context),
+ PointerType::getUnqual(Type::getInt8Ty(*Context)),
NULL);
CallInst *CI = B.CreateCall(StrLen, CastToCStr(Ptr, B), "strlen");
if (const Function *F = dyn_cast<Function>(StrLen->stripPointerCasts()))
Tys[0] = Len->getType();
Value *MemCpy = Intrinsic::getDeclaration(M, IID, Tys, 1);
return B.CreateCall4(MemCpy, CastToCStr(Dst, B), CastToCStr(Src, B), Len,
- ConstantInt::get(Type::Int32Ty, Align));
+ ConstantInt::get(Type::getInt32Ty(*Context), Align));
}
/// EmitMemChr - Emit a call to the memchr function. This assumes that Ptr is
AWI = AttributeWithIndex::get(~0u, Attribute::ReadOnly | Attribute::NoUnwind);
Value *MemChr = M->getOrInsertFunction("memchr", AttrListPtr::get(&AWI, 1),
- Context->getPointerTypeUnqual(Type::Int8Ty),
- Context->getPointerTypeUnqual(Type::Int8Ty),
- Type::Int32Ty, TD->getIntPtrType(),
+ PointerType::getUnqual(Type::getInt8Ty(*Context)),
+ PointerType::getUnqual(Type::getInt8Ty(*Context)),
+ Type::getInt32Ty(*Context), TD->getIntPtrType(*Context),
NULL);
CallInst *CI = B.CreateCall3(MemChr, CastToCStr(Ptr, B), Val, Len, "memchr");
Attribute::NoUnwind);
Value *MemCmp = M->getOrInsertFunction("memcmp", AttrListPtr::get(AWI, 3),
- Type::Int32Ty,
- Context->getPointerTypeUnqual(Type::Int8Ty),
- Context->getPointerTypeUnqual(Type::Int8Ty),
- TD->getIntPtrType(), NULL);
+ Type::getInt32Ty(*Context),
+ PointerType::getUnqual(Type::getInt8Ty(*Context)),
+ PointerType::getUnqual(Type::getInt8Ty(*Context)),
+ TD->getIntPtrType(*Context), NULL);
CallInst *CI = B.CreateCall3(MemCmp, CastToCStr(Ptr1, B), CastToCStr(Ptr2, B),
Len, "memcmp");
const Type *Tys[1];
Tys[0] = Len->getType();
Value *MemSet = Intrinsic::getDeclaration(M, IID, Tys, 1);
- Value *Align = ConstantInt::get(Type::Int32Ty, 1);
+ Value *Align = ConstantInt::get(Type::getInt32Ty(*Context), 1);
return B.CreateCall4(MemSet, CastToCStr(Dst, B), Val, Len, Align);
}
/// returns one value with the same type. If 'Op' is a long double, 'l' is
/// added as the suffix of name, if 'Op' is a float, we add a 'f' suffix.
Value *LibCallOptimization::EmitUnaryFloatFnCall(Value *Op, const char *Name,
- IRBuilder<> &B) {
+ IRBuilder<> &B,
+ const AttrListPtr &Attrs) {
char NameBuffer[20];
- if (Op->getType() != Type::DoubleTy) {
+ if (Op->getType() != Type::getDoubleTy(*Context)) {
// If we need to add a suffix, copy into NameBuffer.
unsigned NameLen = strlen(Name);
assert(NameLen < sizeof(NameBuffer)-2);
memcpy(NameBuffer, Name, NameLen);
- if (Op->getType() == Type::FloatTy)
+ if (Op->getType() == Type::getFloatTy(*Context))
NameBuffer[NameLen] = 'f'; // floorf
else
NameBuffer[NameLen] = 'l'; // floorl
Value *Callee = M->getOrInsertFunction(Name, Op->getType(),
Op->getType(), NULL);
CallInst *CI = B.CreateCall(Callee, Op, Name);
-
+ CI->setAttributes(Attrs);
if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
/// is an integer.
void LibCallOptimization::EmitPutChar(Value *Char, IRBuilder<> &B) {
Module *M = Caller->getParent();
- Value *PutChar = M->getOrInsertFunction("putchar", Type::Int32Ty,
- Type::Int32Ty, NULL);
+ Value *PutChar = M->getOrInsertFunction("putchar", Type::getInt32Ty(*Context),
+ Type::getInt32Ty(*Context), NULL);
CallInst *CI = B.CreateCall(PutChar,
- B.CreateIntCast(Char, Type::Int32Ty, "chari"),
+ B.CreateIntCast(Char, Type::getInt32Ty(*Context), "chari"),
"putchar");
if (const Function *F = dyn_cast<Function>(PutChar->stripPointerCasts()))
AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
Value *PutS = M->getOrInsertFunction("puts", AttrListPtr::get(AWI, 2),
- Type::Int32Ty,
- Context->getPointerTypeUnqual(Type::Int8Ty),
+ Type::getInt32Ty(*Context),
+ PointerType::getUnqual(Type::getInt8Ty(*Context)),
NULL);
CallInst *CI = B.CreateCall(PutS, CastToCStr(Str, B), "puts");
if (const Function *F = dyn_cast<Function>(PutS->stripPointerCasts()))
AWI[1] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
Constant *F;
if (isa<PointerType>(File->getType()))
- F = M->getOrInsertFunction("fputc", AttrListPtr::get(AWI, 2), Type::Int32Ty,
- Type::Int32Ty, File->getType(), NULL);
+ F = M->getOrInsertFunction("fputc", AttrListPtr::get(AWI, 2), Type::getInt32Ty(*Context),
+ Type::getInt32Ty(*Context), File->getType(), NULL);
else
- F = M->getOrInsertFunction("fputc", Type::Int32Ty, Type::Int32Ty,
+ F = M->getOrInsertFunction("fputc", Type::getInt32Ty(*Context), Type::getInt32Ty(*Context),
File->getType(), NULL);
- Char = B.CreateIntCast(Char, Type::Int32Ty, "chari");
+ Char = B.CreateIntCast(Char, Type::getInt32Ty(*Context), "chari");
CallInst *CI = B.CreateCall2(F, Char, File, "fputc");
if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
AWI[2] = AttributeWithIndex::get(~0u, Attribute::NoUnwind);
Constant *F;
if (isa<PointerType>(File->getType()))
- F = M->getOrInsertFunction("fputs", AttrListPtr::get(AWI, 3), Type::Int32Ty,
- Context->getPointerTypeUnqual(Type::Int8Ty),
+ F = M->getOrInsertFunction("fputs", AttrListPtr::get(AWI, 3), Type::getInt32Ty(*Context),
+ PointerType::getUnqual(Type::getInt8Ty(*Context)),
File->getType(), NULL);
else
- F = M->getOrInsertFunction("fputs", Type::Int32Ty,
- Context->getPointerTypeUnqual(Type::Int8Ty),
+ F = M->getOrInsertFunction("fputs", Type::getInt32Ty(*Context),
+ PointerType::getUnqual(Type::getInt8Ty(*Context)),
File->getType(), NULL);
CallInst *CI = B.CreateCall2(F, CastToCStr(Str, B), File, "fputs");
Constant *F;
if (isa<PointerType>(File->getType()))
F = M->getOrInsertFunction("fwrite", AttrListPtr::get(AWI, 3),
- TD->getIntPtrType(),
- Context->getPointerTypeUnqual(Type::Int8Ty),
- TD->getIntPtrType(), TD->getIntPtrType(),
+ TD->getIntPtrType(*Context),
+ PointerType::getUnqual(Type::getInt8Ty(*Context)),
+ TD->getIntPtrType(*Context), TD->getIntPtrType(*Context),
File->getType(), NULL);
else
- F = M->getOrInsertFunction("fwrite", TD->getIntPtrType(),
- Context->getPointerTypeUnqual(Type::Int8Ty),
- TD->getIntPtrType(), TD->getIntPtrType(),
+ F = M->getOrInsertFunction("fwrite", TD->getIntPtrType(*Context),
+ PointerType::getUnqual(Type::getInt8Ty(*Context)),
+ TD->getIntPtrType(*Context), TD->getIntPtrType(*Context),
File->getType(), NULL);
CallInst *CI = B.CreateCall4(F, CastToCStr(Ptr, B), Size,
- ConstantInt::get(TD->getIntPtrType(), 1), File);
+ ConstantInt::get(TD->getIntPtrType(*Context), 1), File);
if (const Function *Fn = dyn_cast<Function>(F->stripPointerCasts()))
CI->setCallingConv(Fn->getCallingConv());
// variable that is a constant and is initialized. The referenced constant
// initializer is the array that we'll use for optimization.
GlobalVariable* GV = dyn_cast<GlobalVariable>(GEP->getOperand(0));
- if (!GV || !GV->isConstant() || !GV->hasInitializer())
+ if (!GV || !GV->isConstant() || !GV->hasInitializer() ||
+ GV->mayBeOverridden())
return 0;
Constant *GlobalInit = GV->getInitializer();
// Must be a Constant Array
ConstantArray *Array = dyn_cast<ConstantArray>(GlobalInit);
- if (!Array || Array->getType()->getElementType() != Type::Int8Ty)
+ if (!Array ||
+ Array->getType()->getElementType() != Type::getInt8Ty(V->getContext()))
return false;
// Get the number of elements in the array
return true;
}
-//===----------------------------------------------------------------------===//
-// Miscellaneous LibCall Optimizations
-//===----------------------------------------------------------------------===//
-
-namespace {
-//===---------------------------------------===//
-// 'exit' Optimizations
-
-/// ExitOpt - int main() { exit(4); } --> int main() { return 4; }
-struct VISIBILITY_HIDDEN ExitOpt : public LibCallOptimization {
- virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
- // Verify we have a reasonable prototype for exit.
- if (Callee->arg_size() == 0 || !CI->use_empty())
- return 0;
-
- // Verify the caller is main, and that the result type of main matches the
- // argument type of exit.
- if (Caller->getName() != "main" || !Caller->hasExternalLinkage() ||
- Caller->getReturnType() != CI->getOperand(1)->getType())
- return 0;
-
- TerminatorInst *OldTI = CI->getParent()->getTerminator();
-
- // Drop all successor phi node entries.
- for (unsigned i = 0, e = OldTI->getNumSuccessors(); i != e; ++i)
- OldTI->getSuccessor(i)->removePredecessor(CI->getParent());
-
- // Remove all instructions after the exit.
- BasicBlock::iterator Dead = CI, E = OldTI; ++Dead;
- while (Dead != E) {
- BasicBlock::iterator Next = next(Dead);
- if (Dead->getType() != Type::VoidTy)
- Dead->replaceAllUsesWith(UndefValue::get(Dead->getType()));
- Dead->eraseFromParent();
- Dead = Next;
- }
-
- // Insert a return instruction.
- OldTI->eraseFromParent();
- B.SetInsertPoint(B.GetInsertBlock());
- B.CreateRet(CI->getOperand(1));
-
- return CI;
- }
-};
-
//===----------------------------------------------------------------------===//
// String and Memory LibCall Optimizations
//===----------------------------------------------------------------------===//
//===---------------------------------------===//
// 'strcat' Optimizations
-
-struct VISIBILITY_HIDDEN StrCatOpt : public LibCallOptimization {
+namespace {
+struct StrCatOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
// Verify the "strcat" function prototype.
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 2 ||
- FT->getReturnType() != Context->getPointerTypeUnqual(Type::Int8Ty) ||
+ FT->getReturnType() != PointerType::getUnqual(Type::getInt8Ty(*Context)) ||
FT->getParamType(0) != FT->getReturnType() ||
FT->getParamType(1) != FT->getReturnType())
return 0;
// Handle the simple, do-nothing case: strcat(x, "") -> x
if (Len == 0)
return Dst;
-
+
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
EmitStrLenMemCpy(Src, Dst, Len, B);
return Dst;
}
// We have enough information to now generate the memcpy call to do the
// concatenation for us. Make a memcpy to copy the nul byte with align = 1.
EmitMemCpy(CpyDst, Src,
- ConstantInt::get(TD->getIntPtrType(), Len+1), 1, B);
+ ConstantInt::get(TD->getIntPtrType(*Context), Len+1), 1, B);
}
};
//===---------------------------------------===//
// 'strncat' Optimizations
-struct VISIBILITY_HIDDEN StrNCatOpt : public StrCatOpt {
+struct StrNCatOpt : public StrCatOpt {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
// Verify the "strncat" function prototype.
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 3 ||
- FT->getReturnType() != Context->getPointerTypeUnqual(Type::Int8Ty) ||
+ FT->getReturnType() != PointerType::getUnqual(Type::getInt8Ty(*Context)) ||
FT->getParamType(0) != FT->getReturnType() ||
FT->getParamType(1) != FT->getReturnType() ||
!isa<IntegerType>(FT->getParamType(2)))
// strncat(x, c, 0) -> x
if (SrcLen == 0 || Len == 0) return Dst;
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
// We don't optimize this case
if (Len < SrcLen) return 0;
//===---------------------------------------===//
// 'strchr' Optimizations
-struct VISIBILITY_HIDDEN StrChrOpt : public LibCallOptimization {
+struct StrChrOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
// Verify the "strchr" function prototype.
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 2 ||
- FT->getReturnType() != Context->getPointerTypeUnqual(Type::Int8Ty) ||
+ FT->getReturnType() != PointerType::getUnqual(Type::getInt8Ty(*Context)) ||
FT->getParamType(0) != FT->getReturnType())
return 0;
// of the input string and turn this into memchr.
ConstantInt *CharC = dyn_cast<ConstantInt>(CI->getOperand(2));
if (CharC == 0) {
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
uint64_t Len = GetStringLength(SrcStr);
- if (Len == 0 || FT->getParamType(1) != Type::Int32Ty) // memchr needs i32.
+ if (Len == 0 || FT->getParamType(1) != Type::getInt32Ty(*Context)) // memchr needs i32.
return 0;
return EmitMemChr(SrcStr, CI->getOperand(2), // include nul.
- ConstantInt::get(TD->getIntPtrType(), Len), B);
+ ConstantInt::get(TD->getIntPtrType(*Context), Len), B);
}
// Otherwise, the character is a constant, see if the first argument is
uint64_t i = 0;
while (1) {
if (i == Str.size()) // Didn't find the char. strchr returns null.
- return Context->getNullValue(CI->getType());
+ return Constant::getNullValue(CI->getType());
// Did we find our match?
if (Str[i] == CharValue)
break;
}
// strchr(s+n,c) -> gep(s+n+i,c)
- Value *Idx = ConstantInt::get(Type::Int64Ty, i);
+ Value *Idx = ConstantInt::get(Type::getInt64Ty(*Context), i);
return B.CreateGEP(SrcStr, Idx, "strchr");
}
};
//===---------------------------------------===//
// 'strcmp' Optimizations
-struct VISIBILITY_HIDDEN StrCmpOpt : public LibCallOptimization {
+struct StrCmpOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
// Verify the "strcmp" function prototype.
const FunctionType *FT = Callee->getFunctionType();
- if (FT->getNumParams() != 2 || FT->getReturnType() != Type::Int32Ty ||
+ if (FT->getNumParams() != 2 || FT->getReturnType() != Type::getInt32Ty(*Context) ||
FT->getParamType(0) != FT->getParamType(1) ||
- FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty))
+ FT->getParamType(0) != PointerType::getUnqual(Type::getInt8Ty(*Context)))
return 0;
Value *Str1P = CI->getOperand(1), *Str2P = CI->getOperand(2);
uint64_t Len1 = GetStringLength(Str1P);
uint64_t Len2 = GetStringLength(Str2P);
if (Len1 && Len2) {
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
return EmitMemCmp(Str1P, Str2P,
- ConstantInt::get(TD->getIntPtrType(),
+ ConstantInt::get(TD->getIntPtrType(*Context),
std::min(Len1, Len2)), B);
}
//===---------------------------------------===//
// 'strncmp' Optimizations
-struct VISIBILITY_HIDDEN StrNCmpOpt : public LibCallOptimization {
+struct StrNCmpOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
// Verify the "strncmp" function prototype.
const FunctionType *FT = Callee->getFunctionType();
- if (FT->getNumParams() != 3 || FT->getReturnType() != Type::Int32Ty ||
+ if (FT->getNumParams() != 3 || FT->getReturnType() != Type::getInt32Ty(*Context) ||
FT->getParamType(0) != FT->getParamType(1) ||
- FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty) ||
+ FT->getParamType(0) != PointerType::getUnqual(Type::getInt8Ty(*Context)) ||
!isa<IntegerType>(FT->getParamType(2)))
return 0;
//===---------------------------------------===//
// 'strcpy' Optimizations
-struct VISIBILITY_HIDDEN StrCpyOpt : public LibCallOptimization {
+struct StrCpyOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
// Verify the "strcpy" function prototype.
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 2 || FT->getReturnType() != FT->getParamType(0) ||
FT->getParamType(0) != FT->getParamType(1) ||
- FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty))
+ FT->getParamType(0) != PointerType::getUnqual(Type::getInt8Ty(*Context)))
return 0;
Value *Dst = CI->getOperand(1), *Src = CI->getOperand(2);
if (Dst == Src) // strcpy(x,x) -> x
return Src;
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
// See if we can get the length of the input string.
uint64_t Len = GetStringLength(Src);
if (Len == 0) return 0;
// We have enough information to now generate the memcpy call to do the
// concatenation for us. Make a memcpy to copy the nul byte with align = 1.
EmitMemCpy(Dst, Src,
- ConstantInt::get(TD->getIntPtrType(), Len), 1, B);
+ ConstantInt::get(TD->getIntPtrType(*Context), Len), 1, B);
return Dst;
}
};
//===---------------------------------------===//
// 'strncpy' Optimizations
-struct VISIBILITY_HIDDEN StrNCpyOpt : public LibCallOptimization {
+struct StrNCpyOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) ||
FT->getParamType(0) != FT->getParamType(1) ||
- FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty) ||
+ FT->getParamType(0) != PointerType::getUnqual(Type::getInt8Ty(*Context)) ||
!isa<IntegerType>(FT->getParamType(2)))
return 0;
if (SrcLen == 0) {
// strncpy(x, "", y) -> memset(x, '\0', y, 1)
- EmitMemSet(Dst, ConstantInt::get(Type::Int8Ty, '\0'), LenOp, B);
+ EmitMemSet(Dst, ConstantInt::get(Type::getInt8Ty(*Context), '\0'), LenOp, B);
return Dst;
}
if (Len == 0) return Dst; // strncpy(x, y, 0) -> x
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
// Let strncpy handle the zero padding
if (Len > SrcLen+1) return 0;
// strncpy(x, s, c) -> memcpy(x, s, c, 1) [s and c are constant]
EmitMemCpy(Dst, Src,
- ConstantInt::get(TD->getIntPtrType(), Len), 1, B);
+ ConstantInt::get(TD->getIntPtrType(*Context), Len), 1, B);
return Dst;
}
//===---------------------------------------===//
// 'strlen' Optimizations
-struct VISIBILITY_HIDDEN StrLenOpt : public LibCallOptimization {
+struct StrLenOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 1 ||
- FT->getParamType(0) != Context->getPointerTypeUnqual(Type::Int8Ty) ||
+ FT->getParamType(0) != PointerType::getUnqual(Type::getInt8Ty(*Context)) ||
!isa<IntegerType>(FT->getReturnType()))
return 0;
//===---------------------------------------===//
// 'strto*' Optimizations
-struct VISIBILITY_HIDDEN StrToOpt : public LibCallOptimization {
+struct StrToOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
if ((FT->getNumParams() != 2 && FT->getNumParams() != 3) ||
//===---------------------------------------===//
// 'memcmp' Optimizations
-struct VISIBILITY_HIDDEN MemCmpOpt : public LibCallOptimization {
+struct MemCmpOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 3 || !isa<PointerType>(FT->getParamType(0)) ||
!isa<PointerType>(FT->getParamType(1)) ||
- FT->getReturnType() != Type::Int32Ty)
+ FT->getReturnType() != Type::getInt32Ty(*Context))
return 0;
Value *LHS = CI->getOperand(1), *RHS = CI->getOperand(2);
if (LHS == RHS) // memcmp(s,s,x) -> 0
- return Context->getNullValue(CI->getType());
+ return Constant::getNullValue(CI->getType());
// Make sure we have a constant length.
ConstantInt *LenC = dyn_cast<ConstantInt>(CI->getOperand(3));
uint64_t Len = LenC->getZExtValue();
if (Len == 0) // memcmp(s1,s2,0) -> 0
- return Context->getNullValue(CI->getType());
+ return Constant::getNullValue(CI->getType());
if (Len == 1) { // memcmp(S1,S2,1) -> *LHS - *RHS
Value *LHSV = B.CreateLoad(CastToCStr(LHS, B), "lhsv");
// memcmp(S1,S2,2) != 0 -> (*(short*)LHS ^ *(short*)RHS) != 0
// memcmp(S1,S2,4) != 0 -> (*(int*)LHS ^ *(int*)RHS) != 0
if ((Len == 2 || Len == 4) && IsOnlyUsedInZeroEqualityComparison(CI)) {
- const Type *PTy = Context->getPointerTypeUnqual(Len == 2 ?
- Type::Int16Ty : Type::Int32Ty);
+ const Type *PTy = PointerType::getUnqual(Len == 2 ?
+ Type::getInt16Ty(*Context) : Type::getInt32Ty(*Context));
LHS = B.CreateBitCast(LHS, PTy, "tmp");
RHS = B.CreateBitCast(RHS, PTy, "tmp");
LoadInst *LHSV = B.CreateLoad(LHS, "lhsv");
//===---------------------------------------===//
// 'memcpy' Optimizations
-struct VISIBILITY_HIDDEN MemCpyOpt : public LibCallOptimization {
+struct MemCpyOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) ||
!isa<PointerType>(FT->getParamType(0)) ||
!isa<PointerType>(FT->getParamType(1)) ||
- FT->getParamType(2) != TD->getIntPtrType())
+ FT->getParamType(2) != TD->getIntPtrType(*Context))
return 0;
// memcpy(x, y, n) -> llvm.memcpy(x, y, n, 1)
//===---------------------------------------===//
// 'memmove' Optimizations
-struct VISIBILITY_HIDDEN MemMoveOpt : public LibCallOptimization {
+struct MemMoveOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) ||
!isa<PointerType>(FT->getParamType(0)) ||
!isa<PointerType>(FT->getParamType(1)) ||
- FT->getParamType(2) != TD->getIntPtrType())
+ FT->getParamType(2) != TD->getIntPtrType(*Context))
return 0;
// memmove(x, y, n) -> llvm.memmove(x, y, n, 1)
Module *M = Caller->getParent();
Intrinsic::ID IID = Intrinsic::memmove;
const Type *Tys[1];
- Tys[0] = TD->getIntPtrType();
+ Tys[0] = TD->getIntPtrType(*Context);
Value *MemMove = Intrinsic::getDeclaration(M, IID, Tys, 1);
Value *Dst = CastToCStr(CI->getOperand(1), B);
Value *Src = CastToCStr(CI->getOperand(2), B);
Value *Size = CI->getOperand(3);
- Value *Align = ConstantInt::get(Type::Int32Ty, 1);
+ Value *Align = ConstantInt::get(Type::getInt32Ty(*Context), 1);
B.CreateCall4(MemMove, Dst, Src, Size, Align);
return CI->getOperand(1);
}
//===---------------------------------------===//
// 'memset' Optimizations
-struct VISIBILITY_HIDDEN MemSetOpt : public LibCallOptimization {
+struct MemSetOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 3 || FT->getReturnType() != FT->getParamType(0) ||
!isa<PointerType>(FT->getParamType(0)) ||
!isa<IntegerType>(FT->getParamType(1)) ||
- FT->getParamType(2) != TD->getIntPtrType())
+ FT->getParamType(2) != TD->getIntPtrType(*Context))
return 0;
// memset(p, v, n) -> llvm.memset(p, v, n, 1)
- Value *Val = B.CreateIntCast(CI->getOperand(2), Type::Int8Ty, false);
+ Value *Val = B.CreateIntCast(CI->getOperand(2), Type::getInt8Ty(*Context), false);
EmitMemSet(CI->getOperand(1), Val, CI->getOperand(3), B);
return CI->getOperand(1);
}
//===---------------------------------------===//
// 'pow*' Optimizations
-struct VISIBILITY_HIDDEN PowOpt : public LibCallOptimization {
+struct PowOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
// Just make sure this has 2 arguments of the same FP type, which match the
if (Op1C->isExactlyValue(1.0)) // pow(1.0, x) -> 1.0
return Op1C;
if (Op1C->isExactlyValue(2.0)) // pow(2.0, x) -> exp2(x)
- return EmitUnaryFloatFnCall(Op2, "exp2", B);
+ return EmitUnaryFloatFnCall(Op2, "exp2", B, CI->getAttributes());
}
ConstantFP *Op2C = dyn_cast<ConstantFP>(Op2);
return ConstantFP::get(CI->getType(), 1.0);
if (Op2C->isExactlyValue(0.5)) {
- // FIXME: This is not safe for -0.0 and -inf. This can only be done when
- // 'unsafe' math optimizations are allowed.
- // x pow(x, 0.5) sqrt(x)
- // ---------------------------------------------
- // -0.0 +0.0 -0.0
- // -inf +inf NaN
-#if 0
- // pow(x, 0.5) -> sqrt(x)
- return B.CreateCall(get_sqrt(), Op1, "sqrt");
-#endif
+ // Expand pow(x, 0.5) to (x == -infinity ? +infinity : fabs(sqrt(x))).
+ // This is faster than calling pow, and still handles negative zero
+ // and negative infinite correctly.
+ // TODO: In fast-math mode, this could be just sqrt(x).
+ // TODO: In finite-only mode, this could be just fabs(sqrt(x)).
+ Value *Inf = ConstantFP::getInf(CI->getType());
+ Value *NegInf = ConstantFP::getInf(CI->getType(), true);
+ Value *Sqrt = EmitUnaryFloatFnCall(Op1, "sqrt", B, CI->getAttributes());
+ Value *FAbs = EmitUnaryFloatFnCall(Sqrt, "fabs", B, CI->getAttributes());
+ Value *FCmp = B.CreateFCmpOEQ(Op1, NegInf, "tmp");
+ Value *Sel = B.CreateSelect(FCmp, Inf, FAbs, "tmp");
+ return Sel;
}
if (Op2C->isExactlyValue(1.0)) // pow(x, 1.0) -> x
//===---------------------------------------===//
// 'exp2' Optimizations
-struct VISIBILITY_HIDDEN Exp2Opt : public LibCallOptimization {
+struct Exp2Opt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
// Just make sure this has 1 argument of FP type, which matches the
Value *LdExpArg = 0;
if (SIToFPInst *OpC = dyn_cast<SIToFPInst>(Op)) {
if (OpC->getOperand(0)->getType()->getPrimitiveSizeInBits() <= 32)
- LdExpArg = B.CreateSExt(OpC->getOperand(0), Type::Int32Ty, "tmp");
+ LdExpArg = B.CreateSExt(OpC->getOperand(0), Type::getInt32Ty(*Context), "tmp");
} else if (UIToFPInst *OpC = dyn_cast<UIToFPInst>(Op)) {
if (OpC->getOperand(0)->getType()->getPrimitiveSizeInBits() < 32)
- LdExpArg = B.CreateZExt(OpC->getOperand(0), Type::Int32Ty, "tmp");
+ LdExpArg = B.CreateZExt(OpC->getOperand(0), Type::getInt32Ty(*Context), "tmp");
}
if (LdExpArg) {
const char *Name;
- if (Op->getType() == Type::FloatTy)
+ if (Op->getType() == Type::getFloatTy(*Context))
Name = "ldexpf";
- else if (Op->getType() == Type::DoubleTy)
+ else if (Op->getType() == Type::getDoubleTy(*Context))
Name = "ldexp";
else
Name = "ldexpl";
Constant *One = ConstantFP::get(*Context, APFloat(1.0f));
- if (Op->getType() != Type::FloatTy)
+ if (Op->getType() != Type::getFloatTy(*Context))
One = ConstantExpr::getFPExtend(One, Op->getType());
Module *M = Caller->getParent();
Value *Callee = M->getOrInsertFunction(Name, Op->getType(),
- Op->getType(), Type::Int32Ty,NULL);
+ Op->getType(), Type::getInt32Ty(*Context),NULL);
CallInst *CI = B.CreateCall2(Callee, One, LdExpArg);
if (const Function *F = dyn_cast<Function>(Callee->stripPointerCasts()))
CI->setCallingConv(F->getCallingConv());
//===---------------------------------------===//
// Double -> Float Shrinking Optimizations for Unary Functions like 'floor'
-struct VISIBILITY_HIDDEN UnaryDoubleFPOpt : public LibCallOptimization {
+struct UnaryDoubleFPOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
- if (FT->getNumParams() != 1 || FT->getReturnType() != Type::DoubleTy ||
- FT->getParamType(0) != Type::DoubleTy)
+ if (FT->getNumParams() != 1 || FT->getReturnType() != Type::getDoubleTy(*Context) ||
+ FT->getParamType(0) != Type::getDoubleTy(*Context))
return 0;
// If this is something like 'floor((double)floatval)', convert to floorf.
FPExtInst *Cast = dyn_cast<FPExtInst>(CI->getOperand(1));
- if (Cast == 0 || Cast->getOperand(0)->getType() != Type::FloatTy)
+ if (Cast == 0 || Cast->getOperand(0)->getType() != Type::getFloatTy(*Context))
return 0;
// floor((double)floatval) -> (double)floorf(floatval)
Value *V = Cast->getOperand(0);
- V = EmitUnaryFloatFnCall(V, Callee->getName().data(), B);
- return B.CreateFPExt(V, Type::DoubleTy);
+ V = EmitUnaryFloatFnCall(V, Callee->getName().data(), B, CI->getAttributes());
+ return B.CreateFPExt(V, Type::getDoubleTy(*Context));
}
};
//===---------------------------------------===//
// 'ffs*' Optimizations
-struct VISIBILITY_HIDDEN FFSOpt : public LibCallOptimization {
+struct FFSOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
// Just make sure this has 2 arguments of the same FP type, which match the
// result type.
- if (FT->getNumParams() != 1 || FT->getReturnType() != Type::Int32Ty ||
+ if (FT->getNumParams() != 1 || FT->getReturnType() != Type::getInt32Ty(*Context) ||
!isa<IntegerType>(FT->getParamType(0)))
return 0;
// Constant fold.
if (ConstantInt *CI = dyn_cast<ConstantInt>(Op)) {
if (CI->getValue() == 0) // ffs(0) -> 0.
- return Context->getNullValue(CI->getType());
- return ConstantInt::get(Type::Int32Ty, // ffs(c) -> cttz(c)+1
+ return Constant::getNullValue(CI->getType());
+ return ConstantInt::get(Type::getInt32Ty(*Context), // ffs(c) -> cttz(c)+1
CI->getValue().countTrailingZeros()+1);
}
Intrinsic::cttz, &ArgType, 1);
Value *V = B.CreateCall(F, Op, "cttz");
V = B.CreateAdd(V, ConstantInt::get(V->getType(), 1), "tmp");
- V = B.CreateIntCast(V, Type::Int32Ty, false, "tmp");
+ V = B.CreateIntCast(V, Type::getInt32Ty(*Context), false, "tmp");
- Value *Cond = B.CreateICmpNE(Op, Context->getNullValue(ArgType), "tmp");
- return B.CreateSelect(Cond, V, ConstantInt::get(Type::Int32Ty, 0));
+ Value *Cond = B.CreateICmpNE(Op, Constant::getNullValue(ArgType), "tmp");
+ return B.CreateSelect(Cond, V, ConstantInt::get(Type::getInt32Ty(*Context), 0));
}
};
//===---------------------------------------===//
// 'isdigit' Optimizations
-struct VISIBILITY_HIDDEN IsDigitOpt : public LibCallOptimization {
+struct IsDigitOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
// We require integer(i32)
if (FT->getNumParams() != 1 || !isa<IntegerType>(FT->getReturnType()) ||
- FT->getParamType(0) != Type::Int32Ty)
+ FT->getParamType(0) != Type::getInt32Ty(*Context))
return 0;
// isdigit(c) -> (c-'0') <u 10
Value *Op = CI->getOperand(1);
- Op = B.CreateSub(Op, ConstantInt::get(Type::Int32Ty, '0'),
+ Op = B.CreateSub(Op, ConstantInt::get(Type::getInt32Ty(*Context), '0'),
"isdigittmp");
- Op = B.CreateICmpULT(Op, ConstantInt::get(Type::Int32Ty, 10),
+ Op = B.CreateICmpULT(Op, ConstantInt::get(Type::getInt32Ty(*Context), 10),
"isdigit");
return B.CreateZExt(Op, CI->getType());
}
//===---------------------------------------===//
// 'isascii' Optimizations
-struct VISIBILITY_HIDDEN IsAsciiOpt : public LibCallOptimization {
+struct IsAsciiOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
// We require integer(i32)
if (FT->getNumParams() != 1 || !isa<IntegerType>(FT->getReturnType()) ||
- FT->getParamType(0) != Type::Int32Ty)
+ FT->getParamType(0) != Type::getInt32Ty(*Context))
return 0;
// isascii(c) -> c <u 128
Value *Op = CI->getOperand(1);
- Op = B.CreateICmpULT(Op, ConstantInt::get(Type::Int32Ty, 128),
+ Op = B.CreateICmpULT(Op, ConstantInt::get(Type::getInt32Ty(*Context), 128),
"isascii");
return B.CreateZExt(Op, CI->getType());
}
//===---------------------------------------===//
// 'abs', 'labs', 'llabs' Optimizations
-struct VISIBILITY_HIDDEN AbsOpt : public LibCallOptimization {
+struct AbsOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
// We require integer(integer) where the types agree.
// abs(x) -> x >s -1 ? x : -x
Value *Op = CI->getOperand(1);
Value *Pos = B.CreateICmpSGT(Op,
- Context->getAllOnesValue(Op->getType()),
+ Constant::getAllOnesValue(Op->getType()),
"ispos");
Value *Neg = B.CreateNeg(Op, "neg");
return B.CreateSelect(Pos, Op, Neg);
//===---------------------------------------===//
// 'toascii' Optimizations
-struct VISIBILITY_HIDDEN ToAsciiOpt : public LibCallOptimization {
+struct ToAsciiOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
const FunctionType *FT = Callee->getFunctionType();
// We require i32(i32)
if (FT->getNumParams() != 1 || FT->getReturnType() != FT->getParamType(0) ||
- FT->getParamType(0) != Type::Int32Ty)
+ FT->getParamType(0) != Type::getInt32Ty(*Context))
return 0;
// isascii(c) -> c & 0x7f
//===---------------------------------------===//
// 'printf' Optimizations
-struct VISIBILITY_HIDDEN PrintFOpt : public LibCallOptimization {
+struct PrintFOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
// Require one fixed pointer argument and an integer/void result.
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() < 1 || !isa<PointerType>(FT->getParamType(0)) ||
!(isa<IntegerType>(FT->getReturnType()) ||
- FT->getReturnType() == Type::VoidTy))
+ FT->getReturnType() == Type::getVoidTy(*Context)))
return 0;
// Check for a fixed format string.
// printf("x") -> putchar('x'), even for '%'.
if (FormatStr.size() == 1) {
- EmitPutChar(ConstantInt::get(Type::Int32Ty, FormatStr[0]), B);
+ EmitPutChar(ConstantInt::get(Type::getInt32Ty(*Context), FormatStr[0]), B);
return CI->use_empty() ? (Value*)CI :
ConstantInt::get(CI->getType(), 1);
}
// Create a string literal with no \n on it. We expect the constant merge
// pass to be run after this pass, to merge duplicate strings.
FormatStr.erase(FormatStr.end()-1);
- Constant *C = ConstantArray::get(FormatStr, true);
+ Constant *C = ConstantArray::get(*Context, FormatStr, true);
C = new GlobalVariable(*Callee->getParent(), C->getType(), true,
GlobalVariable::InternalLinkage, C, "str");
EmitPutS(C, B);
//===---------------------------------------===//
// 'sprintf' Optimizations
-struct VISIBILITY_HIDDEN SPrintFOpt : public LibCallOptimization {
+struct SPrintFOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
// Require two fixed pointer arguments and an integer result.
const FunctionType *FT = Callee->getFunctionType();
for (unsigned i = 0, e = FormatStr.size(); i != e; ++i)
if (FormatStr[i] == '%')
return 0; // we found a format specifier, bail out.
-
+
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
// sprintf(str, fmt) -> llvm.memcpy(str, fmt, strlen(fmt)+1, 1)
EmitMemCpy(CI->getOperand(1), CI->getOperand(2), // Copy the nul byte.
- ConstantInt::get(TD->getIntPtrType(), FormatStr.size()+1),1,B);
+ ConstantInt::get(TD->getIntPtrType(*Context), FormatStr.size()+1),1,B);
return ConstantInt::get(CI->getType(), FormatStr.size());
}
if (FormatStr[1] == 'c') {
// sprintf(dst, "%c", chr) --> *(i8*)dst = chr; *((i8*)dst+1) = 0
if (!isa<IntegerType>(CI->getOperand(3)->getType())) return 0;
- Value *V = B.CreateTrunc(CI->getOperand(3), Type::Int8Ty, "char");
+ Value *V = B.CreateTrunc(CI->getOperand(3), Type::getInt8Ty(*Context), "char");
Value *Ptr = CastToCStr(CI->getOperand(1), B);
B.CreateStore(V, Ptr);
- Ptr = B.CreateGEP(Ptr, ConstantInt::get(Type::Int32Ty, 1), "nul");
- B.CreateStore(Context->getNullValue(Type::Int8Ty), Ptr);
+ Ptr = B.CreateGEP(Ptr, ConstantInt::get(Type::getInt32Ty(*Context), 1), "nul");
+ B.CreateStore(Constant::getNullValue(Type::getInt8Ty(*Context)), Ptr);
return ConstantInt::get(CI->getType(), 1);
}
if (FormatStr[1] == 's') {
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
// sprintf(dest, "%s", str) -> llvm.memcpy(dest, str, strlen(str)+1, 1)
if (!isa<PointerType>(CI->getOperand(3)->getType())) return 0;
//===---------------------------------------===//
// 'fwrite' Optimizations
-struct VISIBILITY_HIDDEN FWriteOpt : public LibCallOptimization {
+struct FWriteOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
// Require a pointer, an integer, an integer, a pointer, returning integer.
const FunctionType *FT = Callee->getFunctionType();
//===---------------------------------------===//
// 'fputs' Optimizations
-struct VISIBILITY_HIDDEN FPutsOpt : public LibCallOptimization {
+struct FPutsOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
// Require two pointers. Also, we can't optimize if return value is used.
const FunctionType *FT = Callee->getFunctionType();
if (FT->getNumParams() != 2 || !isa<PointerType>(FT->getParamType(0)) ||
uint64_t Len = GetStringLength(CI->getOperand(1));
if (!Len) return 0;
EmitFWrite(CI->getOperand(1),
- ConstantInt::get(TD->getIntPtrType(), Len-1),
+ ConstantInt::get(TD->getIntPtrType(*Context), Len-1),
CI->getOperand(2), B);
return CI; // Known to have no uses (see above).
}
//===---------------------------------------===//
// 'fprintf' Optimizations
-struct VISIBILITY_HIDDEN FPrintFOpt : public LibCallOptimization {
+struct FPrintFOpt : public LibCallOptimization {
virtual Value *CallOptimizer(Function *Callee, CallInst *CI, IRBuilder<> &B) {
// Require two fixed paramters as pointers and integer result.
const FunctionType *FT = Callee->getFunctionType();
for (unsigned i = 0, e = FormatStr.size(); i != e; ++i)
if (FormatStr[i] == '%') // Could handle %% -> % if we cared.
return 0; // We found a format specifier.
-
- EmitFWrite(CI->getOperand(2), ConstantInt::get(TD->getIntPtrType(),
+
+ // These optimizations require TargetData.
+ if (!TD) return 0;
+
+ EmitFWrite(CI->getOperand(2), ConstantInt::get(TD->getIntPtrType(*Context),
FormatStr.size()),
CI->getOperand(1), B);
return ConstantInt::get(CI->getType(), FormatStr.size());
namespace {
/// This pass optimizes well known library functions from libc and libm.
///
- class VISIBILITY_HIDDEN SimplifyLibCalls : public FunctionPass {
+ class SimplifyLibCalls : public FunctionPass {
StringMap<LibCallOptimization*> Optimizations;
- // Miscellaneous LibCall Optimizations
- ExitOpt Exit;
// String and Memory LibCall Optimizations
StrCatOpt StrCat; StrNCatOpt StrNCat; StrChrOpt StrChr; StrCmpOpt StrCmp;
StrNCmpOpt StrNCmp; StrCpyOpt StrCpy; StrNCpyOpt StrNCpy; StrLenOpt StrLen;
bool doInitialization(Module &M);
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
- AU.addRequired<TargetData>();
}
};
char SimplifyLibCalls::ID = 0;
/// Optimizations - Populate the Optimizations map with all the optimizations
/// we know.
void SimplifyLibCalls::InitOptimizations() {
- // Miscellaneous LibCall Optimizations
- Optimizations["exit"] = &Exit;
-
// String and Memory LibCall Optimizations
Optimizations["strcat"] = &StrCat;
Optimizations["strncat"] = &StrNCat;
if (Optimizations.empty())
InitOptimizations();
- const TargetData &TD = getAnalysis<TargetData>();
+ const TargetData *TD = getAnalysisIfAvailable<TargetData>();
IRBuilder<> Builder(F.getContext());
}
break;
case 'm':
- if (Name == "memcmp") {
+ if (Name == "malloc") {
+ if (FTy->getNumParams() != 1 ||
+ !isa<PointerType>(FTy->getReturnType()))
+ continue;
+ setDoesNotThrow(F);
+ setDoesNotAlias(F, 0);
+ } else if (Name == "memcmp") {
if (FTy->getNumParams() != 3 ||
!isa<PointerType>(FTy->getParamType(0)) ||
!isa<PointerType>(FTy->getParamType(1)))