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-rw-r--r--llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp b/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
index a3f3f25c1e0..21a632073da 100644
--- a/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
+++ b/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
@@ -1323,7 +1323,7 @@ bool MemCpyOptPass::processByValArgument(CallSite CS, unsigned ArgNo) {
// Get the alignment of the byval. If the call doesn't specify the alignment,
// then it is some target specific value that we can't know.
- unsigned ByValAlign = CS.getParamAlignment(ArgNo+1);
+ unsigned ByValAlign = CS.getParamAlignment(ArgNo);
if (ByValAlign == 0) return false;
// If it is greater than the memcpy, then we check to see if we can force the
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