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At the point of calculating the shift amount, the

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type of SV has changed from what it originally was.
However we need the store width of the original.

llvm-svn: 43775
This commit is contained in:
Duncan Sands 2007-11-06 20:39:11 +00:00
parent 3609f43f5c
commit 59b08debe3
1 changed files with 3 additions and 2 deletions
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5
lib/Transforms/Scalar/ScalarReplAggregates.cpp
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@ -1179,6 +1179,8 @@ void SROA::ConvertUsesToScalar(Value *Ptr, AllocaInst *NewAI, unsigned Offset) {
// here.
unsigned SrcWidth = TD.getTypeSizeInBits(SV->getType());
unsigned DestWidth = TD.getTypeSizeInBits(AllocaType);
unsigned SrcStoreWidth = TD.getTypeStoreSizeInBits(SV->getType());
unsigned DestStoreWidth = TD.getTypeStoreSizeInBits(AllocaType);
if (SV->getType()->isFloatingPoint())
SV = new BitCastInst(SV, IntegerType::get(SrcWidth),
SV->getName(), SI);
@ -1196,8 +1198,7 @@ void SROA::ConvertUsesToScalar(Value *Ptr, AllocaInst *NewAI, unsigned Offset) {
// On big-endian machines, the lowest bit is stored at the bit offset
// from the pointer given by getTypeStoreSizeInBits. This matters for
// integers with a bitwidth that is not a multiple of 8.
ShAmt = TD.getTypeStoreSizeInBits(AllocaType) -
TD.getTypeStoreSizeInBits(SV->getType()) - Offset;
ShAmt = DestStoreWidth - SrcStoreWidth - Offset;
} else {
ShAmt = Offset;
}