maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

Fix InstCombine/2007-05-04-Crash.ll and PR1384 

llvm-svn: 36775
This commit is contained in:
Chris Lattner 2007-05-05 01:59:31 +00:00
parent 8b332d32be
commit 5c827bda0d
1 changed files with 14 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
llvm/lib/Transforms/Scalar/InstructionCombining.cpp
View File

@ -6404,21 +6404,25 @@ Instruction *InstCombiner::commonPointerCastTransforms(CastInst &CI) {
if (GEPIdxTy->isSized()) {
SmallVector<Value*, 8> NewIndices;
// Start with the index over the outer type.
// Start with the index over the outer type. Note that the type size
// might be zero (even if the offset isn't zero) if the indexed type
// is something like [0 x {int, int}]
const Type *IntPtrTy = TD->getIntPtrType();
int64_t TySize = TD->getTypeSize(GEPIdxTy);
int64_t FirstIdx = Offset/TySize;
Offset %= TySize;
int64_t FirstIdx = 0;
if (int64_t TySize = TD->getTypeSize(GEPIdxTy)) {
FirstIdx = Offset/TySize;
Offset %= TySize;
// Handle silly modulus not returning values values [0..TySize).
if (Offset < 0) {
--FirstIdx;
Offset += TySize;
assert(Offset >= 0);
// Handle silly modulus not returning values values [0..TySize).
if (Offset < 0) {
--FirstIdx;
Offset += TySize;
assert(Offset >= 0);
}
assert((uint64_t)Offset < (uint64_t)TySize && "Out of range offset");
}
NewIndices.push_back(ConstantInt::get(IntPtrTy, FirstIdx));
assert((uint64_t)Offset < (uint64_t)TySize && "Out of range offset");
// Index into the types. If we fail, set OrigBase to null.
while (Offset) {