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If we're dealing with a zero-length array, don't lower to any

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particular size, we just don't know what the length is yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95266 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2010-02-03 23:56:07 +00:00
parent 9e90619a0e
commit ec5ef6d8b0
2 changed files with 20 additions and 4 deletions
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13
lib/Transforms/InstCombine/InstCombineCalls.cpp
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@@ -648,14 +648,19 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
if (const ArrayType *AT = dyn_cast<ArrayType>(ObjTy->getElementType())) {
// Deal with multi-dimensional arrays
// Deal with multi-dimensional arrays
const ArrayType *SAT = AT;
while ((AT = dyn_cast<ArrayType>(AT->getElementType())))
SAT = AT;
size_t numElems = SAT->getNumElements();
// We return the remaining bytes, so grab the size of an element
// in bytes.
// If numElems is 0, we don't know how large the array is so we can't
// make any determinations yet.
if (numElems == 0) break;
// We return the remaining bytes, so grab the size of an element
// in bytes.
size_t sizeofElem = SAT->getElementType()->getPrimitiveSizeInBits() / 8;
ConstantInt *Const =
@@ -665,7 +670,7 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) {
ConstantInt::get(ReturnTy,
((numElems - indx) * sizeofElem)));
}
}
}
// TODO: Add more types here.
}
}