| commit | 2def1c445826be77a11926b89f901c0cd6d571d7 | |
| author | Piyou Chen <piyou.chen@sifive.com> | |
| Wed, 28 Aug 2024 00:32:54 +0000 (28 08:32 +0800) | ||
| committer | GitHub <noreply@github.com> | |
| Wed, 28 Aug 2024 00:32:54 +0000 (28 08:32 +0800) | ||
| tree | e43a2fc3ddeacb5d4d225c209b961193e09f402c | treesnapshot (tar.gz zip) |
| parent | 32abe5d49b758edef0f0c19090361a6fe85c4092 | commitdiff |
[RISCV][MCP] Remove redundant move from tail duplication (#89865)
Tail duplication will generate the redundant move before return. It is
because the MachineCopyPropogation can't recognize COPY after post-RA
pseudoExpand.
This patch make MachineCopyPropogation recognize `%0 = ADDI %1, 0` as
COPY
Tail duplication will generate the redundant move before return. It is
because the MachineCopyPropogation can't recognize COPY after post-RA
pseudoExpand.
This patch make MachineCopyPropogation recognize `%0 = ADDI %1, 0` as
COPY
| llvm/lib/CodeGen/MachineCopyPropagation.cpp | diffblobblamehistory | |
| llvm/test/CodeGen/RISCV/redundant-copy-from-tail-duplicate.ll | [new file with mode: 0644] | blob |