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| author | Carl Ritson <carl.ritson@amd.com> | 2021-10-07 19:36:10 +0900 |
|---|---|---|
| committer | Carl Ritson <carl.ritson@amd.com> | 2021-10-07 20:34:27 +0900 |
| commit | b5d6ad20e182318b2048a923eac56a198250ed0a (patch) | |
| tree | c1ad67d5941c81930228d2abdd4e02280c8d3e92 /llvm/lib/CodeGen/MachineCopyPropagation.cpp | |
| parent | 322e13b91aac23ab324c3dcbbcfe8e73894f4c28 (diff) | |
| download | llvm-b5d6ad20e182318b2048a923eac56a198250ed0a.zip llvm-b5d6ad20e182318b2048a923eac56a198250ed0a.tar.gz llvm-b5d6ad20e182318b2048a923eac56a198250ed0a.tar.bz2 | |
[MachineCopyPropagation] Handle propagation of undef copies
When propagating undefined copies the undef flag must also be
propagated.
Reviewed By: foad
Differential Revision: https://reviews.llvm.org/D111219
Diffstat (limited to 'llvm/lib/CodeGen/MachineCopyPropagation.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineCopyPropagation.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MachineCopyPropagation.cpp b/llvm/lib/CodeGen/MachineCopyPropagation.cpp index 2d9ada5..e3fbd88 100644 --- a/llvm/lib/CodeGen/MachineCopyPropagation.cpp +++ b/llvm/lib/CodeGen/MachineCopyPropagation.cpp @@ -576,6 +576,7 @@ void MachineCopyPropagation::forwardUses(MachineInstr &MI) { MOUse.setReg(CopySrcReg); if (!CopySrc.isRenamable()) MOUse.setIsRenamable(false); + MOUse.setIsUndef(CopySrc.isUndef()); LLVM_DEBUG(dbgs() << "MCP: After replacement: " << MI << "\n"); |