fix a bozo bug I introduced in r119930, causing a miscompile of
20040709-1.c from the gcc testsuite. I was using the size of a
pointer instead of the pointee. This fixes rdar://8713376
llvm-svn: 120519
diff --git a/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp b/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
index 087f022..5d867e7 100644
--- a/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
+++ b/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
@@ -814,7 +814,8 @@
// Find out what feeds this byval argument.
Value *ByValArg = CS.getArgument(ArgNo);
- uint64_t ByValSize = TD->getTypeAllocSize(ByValArg->getType());
+ const Type *ByValTy =cast<PointerType>(ByValArg->getType())->getElementType();
+ uint64_t ByValSize = TD->getTypeAllocSize(ByValTy);
MemDepResult DepInfo =
MD->getPointerDependencyFrom(AliasAnalysis::Location(ByValArg, ByValSize),
true, CS.getInstruction(),