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-rw-r--r--llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp b/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
index e93f56da454..92a60fa0794 100644
--- a/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
+++ b/llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp
@@ -1060,6 +1060,8 @@ bool MemCpyOptPass::processMemCpyMemCpyDependence(MemCpyInst *M,
UseMemMove = true;
// If all checks passed, then we can transform M.
+ LLVM_DEBUG(dbgs() << "MemCpyOptPass: Forwarding memcpy->memcpy src:\n"
+ << *MDep << '\n' << *M << '\n');
// TODO: Is this worth it if we're creating a less aligned memcpy? For
// example we could be moving from movaps -> movq on x86.
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