[llvm] [MachineCopyPropagation] When the source of PreviousCopy is undef, we cannot replace sub register (PR #74682)
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Thu Dec 7 01:18:38 PST 2023
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@@ -0,0 +1,145 @@
+# RUN: llc -o - %s -O3 -mcpu=apple-m1 -mtriple=arm64-apple-macos | FileCheck %s
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DianQK wrote:
> Can this be reduced to just a `-run-pass=machine-cp` test? Please also update update_mir_checks.py.
I think it's possible, but I'm still trying. After the reduction is complete, I'll switch to update_mir_checks.py.
https://github.com/llvm/llvm-project/pull/74682
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