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Add missing function CreateFPCast to the TargetFolder. It's there in the other 

folders and not having it here fails to compile if you actually try to use it.

Also, CreatePointerCast was failing to do the part where it does TD-aware
constant folding. Granted there is exactly one case where that it will ever
do anything, but there's no reason to skip it. For reference, that case is a
subtraction between two constant offsets on the same global variable, eg.,
"&A[123] - &A[4].f".

llvm-svn: 164760
This commit is contained in:
Nick Lewycky 2012-09-27 06:33:40 +00:00
parent 47172a064f
commit 04f832bf2c
1 changed files with 8 additions and 1 deletions
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9
llvm/include/llvm/Support/TargetFolder.h
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@ -177,7 +177,14 @@ public:
return Fold(ConstantExpr::getIntegerCast(C, DestTy, isSigned));
}
Constant *CreatePointerCast(Constant *C, Type *DestTy) const {
return ConstantExpr::getPointerCast(C, DestTy);
if (C->getType() == DestTy)
return C; // avoid calling Fold
return Fold(ConstantExpr::getPointerCast(C, DestTy));
}
Constant *CreateFPCast(Constant *C, Type *DestTy) const {
if (C->getType() == DestTy)
return C; // avoid calling Fold
return Fold(ConstantExpr::getFPCast(C, DestTy));
}
Constant *CreateBitCast(Constant *C, Type *DestTy) const {
return CreateCast(Instruction::BitCast, C, DestTy);