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| author | Jessica Paquette <jpaquette@apple.com> | 2022-01-31 10:42:19 -0800 |
|---|---|---|
| committer | Jessica Paquette <jpaquette@apple.com> | 2022-02-03 14:23:58 -0800 |
| commit | c636899dc1fad6ecd0a1846d531df72fc7e76e22 (patch) | |
| tree | aa5092f37eed8bedac4c5bc9b3e14c2fc2add1c8 /llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp | |
| parent | 0557c6a7970d174d4c575b667590490d5c9a3539 (diff) | |
| download | llvm-c636899dc1fad6ecd0a1846d531df72fc7e76e22.zip llvm-c636899dc1fad6ecd0a1846d531df72fc7e76e22.tar.gz llvm-c636899dc1fad6ecd0a1846d531df72fc7e76e22.tar.bz2 | |
[GlobalISel] Combine: (G_*MULO x, 0) -> 0 + no carry out
Similar to the following combine in `DAGCombiner::visitMULO`:
```
// fold (mulo x, 0) -> 0 + no carry out
if (isNullOrNullSplat(N1))
return CombineTo(N, DAG.getConstant(0, DL, VT),
DAG.getConstant(0, DL, CarryVT));
```
This fixes some generally poor codegen for `*mulo`:
https://godbolt.org/z/eTxYsvz8f
Differential Revision: https://reviews.llvm.org/D118635
Diffstat (limited to 'llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp')
0 files changed, 0 insertions, 0 deletions