Don't try to compute the size of an "array" element if the index is 0:
the size may be unknown, and is not needed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4153 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetData.cpp b/lib/Target/TargetData.cpp
index ec27d9e..fae5e10 100644
--- a/lib/Target/TargetData.cpp
+++ b/lib/Target/TargetData.cpp
@@ -170,11 +170,10 @@
Ty = cast<SequentialType>(Ty)->getElementType();
// Get the array index and the size of each array element.
- // Both must be known constants, or this will fail.
- // Also, the product needs to be sign-extended from 32 to 64 bits.
- int64_t elementSize = (int64_t)getTypeSize(Ty);
+ // Both must be known constants, or the index shd be 0; else this fails.
int64_t arrayIdx = cast<ConstantSInt>(Idx[CurIDX])->getValue();
- Result += (uint64_t)(arrayIdx * elementSize);
+ Result += arrayIdx == 0? 0
+ : (uint64_t) (arrayIdx * (int64_t) getTypeSize(Ty));
} else if (const StructType *STy = dyn_cast<const StructType>(Ty)) {
assert(Idx[CurIDX]->getType() == Type::UByteTy && "Illegal struct idx");