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If a long double is in a packed struct, it may be

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that there is no padding.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43691 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2007-11-05 00:35:07 +00:00
parent 62a709d74b
commit 18b0ca854f
1 changed files with 7 additions and 5 deletions
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12
lib/Transforms/Scalar/ScalarReplAggregates.cpp
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@ -733,7 +733,8 @@ void SROA::RewriteBitCastUserOfAlloca(Instruction *BCInst, AllocationInst *AI,
/// HasPadding - Return true if the specified type has any structure or /// HasPadding - Return true if the specified type has any structure or
/// alignment padding, false otherwise. /// alignment padding, false otherwise.
static bool HasPadding(const Type *Ty, const TargetData &TD) { static bool HasPadding(const Type *Ty, const TargetData &TD,
bool inPacked = false) {
if (const StructType *STy = dyn_cast<StructType>(Ty)) { if (const StructType *STy = dyn_cast<StructType>(Ty)) {
const StructLayout *SL = TD.getStructLayout(STy); const StructLayout *SL = TD.getStructLayout(STy);
unsigned PrevFieldBitOffset = 0; unsigned PrevFieldBitOffset = 0;
@ -741,7 +742,7 @@ static bool HasPadding(const Type *Ty, const TargetData &TD) {
unsigned FieldBitOffset = SL->getElementOffsetInBits(i); unsigned FieldBitOffset = SL->getElementOffsetInBits(i);
// Padding in sub-elements? // Padding in sub-elements?
if (HasPadding(STy->getElementType(i), TD)) if (HasPadding(STy->getElementType(i), TD, STy->isPacked()))
return true; return true;
// Check to see if there is any padding between this element and the // Check to see if there is any padding between this element and the
@ -765,11 +766,12 @@ static bool HasPadding(const Type *Ty, const TargetData &TD) {
} }
} else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) { } else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
return HasPadding(ATy->getElementType(), TD); return HasPadding(ATy->getElementType(), TD, false);
} else if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) { } else if (const VectorType *VTy = dyn_cast<VectorType>(Ty)) {
return HasPadding(VTy->getElementType(), TD); return HasPadding(VTy->getElementType(), TD, false);
} }
return TD.getTypeSizeInBits(Ty) != TD.getABITypeSizeInBits(Ty); return inPacked ?
false : TD.getTypeSizeInBits(Ty) != TD.getABITypeSizeInBits(Ty);
} }
/// isSafeStructAllocaToScalarRepl - Check to see if the specified allocation of /// isSafeStructAllocaToScalarRepl - Check to see if the specified allocation of