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Permit the IntPtrTy argument to isEliminableCastPair to be null, 

to help support use when TargetData is not available.

llvm-svn: 76675
This commit is contained in:
Dan Gohman 2009-07-21 23:19:40 +00:00
parent 843f55346b
commit 9413de19b1
2 changed files with 5 additions and 1 deletions
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2
llvm/include/llvm/InstrTypes.h
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@ -479,7 +479,7 @@ public:
const Type *SrcTy, ///< SrcTy of 1st cast
const Type *MidTy, ///< DstTy of 1st cast & SrcTy of 2nd cast
const Type *DstTy, ///< DstTy of 2nd cast
const Type *IntPtrTy ///< Integer type corresponding to Ptr types
const Type *IntPtrTy ///< Integer type corresponding to Ptr types, or null
);
/// @brief Return the opcode of this CastInst

4
llvm/lib/VMCore/Instructions.cpp
View File

@ -1890,6 +1890,8 @@ unsigned CastInst::isEliminableCastPair(
return 0;
case 7: {
// ptrtoint, inttoptr -> bitcast (ptr -> ptr) if int size is >= ptr size
if (!IntPtrTy)
return 0;
unsigned PtrSize = IntPtrTy->getScalarSizeInBits();
unsigned MidSize = MidTy->getScalarSizeInBits();
if (MidSize >= PtrSize)
@ -1929,6 +1931,8 @@ unsigned CastInst::isEliminableCastPair(
return 0;
case 13: {
// inttoptr, ptrtoint -> bitcast if SrcSize<=PtrSize and SrcSize==DstSize
if (!IntPtrTy)
return 0;
unsigned PtrSize = IntPtrTy->getScalarSizeInBits();
unsigned SrcSize = SrcTy->getScalarSizeInBits();
unsigned DstSize = DstTy->getScalarSizeInBits();