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Fix PR3304 

llvm-svn: 61995
This commit is contained in:
Chris Lattner 2009-01-09 18:18:43 +00:00
parent ffca3a21f1
commit ae0e857b98
2 changed files with 27 additions and 2 deletions
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14
llvm/lib/Transforms/Scalar/ScalarReplAggregates.cpp
View File

@ -856,6 +856,10 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI,
// Truncate down to an integer of the right size.
uint64_t FieldSizeBits = TD->getTypeSizeInBits(FieldTy);
// Ignore zero sized fields like {}, they obviously contain no data.
if (FieldSizeBits == 0) continue;
if (FieldSizeBits != AllocaSizeBits)
EltVal = new TruncInst(EltVal, IntegerType::get(FieldSizeBits), "", SI);
Value *DestField = NewElts[i];
@ -887,6 +891,8 @@ void SROA::RewriteStoreUserOfWholeAlloca(StoreInst *SI,
Shift = 0;
for (unsigned i = 0, e = NewElts.size(); i != e; ++i) {
// Ignore zero sized fields like {}, they obviously contain no data.
if (ElementSizeBits == 0) continue;
Value *EltVal = SrcVal;
if (Shift) {
@ -959,8 +965,12 @@ void SROA::RewriteLoadUserOfWholeAlloca(LoadInst *LI, AllocationInst *AI,
Value *SrcField = NewElts[i];
const Type *FieldTy =
cast<PointerType>(SrcField->getType())->getElementType();
const IntegerType *FieldIntTy =
IntegerType::get(TD->getTypeSizeInBits(FieldTy));
uint64_t FieldSizeBits = TD->getTypeSizeInBits(FieldTy);
// Ignore zero sized fields like {}, they obviously contain no data.
if (FieldSizeBits == 0) continue;
const IntegerType *FieldIntTy = IntegerType::get(FieldSizeBits);
if (!isa<IntegerType>(FieldTy) && !FieldTy->isFloatingPoint() &&
!isa<VectorType>(FieldTy))
SrcField = new BitCastInst(SrcField, PointerType::getUnqual(FieldIntTy),

15
llvm/test/Transforms/ScalarRepl/2009-01-09-scalarrepl-empty.ll Normal file
View File

@ -0,0 +1,15 @@
; RUN: llvm-as < %s | opt -scalarrepl | llvm-dis
; PR3304
%struct.c37304a__vrec = type { i8, %struct.c37304a__vrec___disc___XVN }
%struct.c37304a__vrec___disc___XVN = type {
%struct.c37304a__vrec___disc___XVN___O }
%struct.c37304a__vrec___disc___XVN___O = type { }
define void @_ada_c37304a() {
entry:
%v = alloca %struct.c37304a__vrec ;
%0 = getelementptr %struct.c37304a__vrec* %v, i32 0, i32 0
store i8 8, i8* %0, align 1
unreachable
}