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-rw-r--r--llvm/lib/CodeGen/TwoAddressInstructionPass.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
index ac4c1bb3ace..157a4192f39 100644
--- a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -630,6 +630,7 @@ isProfitableToCommute(unsigned regA, unsigned regB, unsigned regC,
// To more generally minimize register copies, ideally the logic of two addr
// instruction pass should be integrated with register allocation pass where
// interference graph is available.
+
if (isRevCopyChain(regC, regA, 3))
return true;
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