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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2023-01-27 17:26:19 -0600 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2023-01-27 17:45:35 -0600 |
| commit | aa250ceb3ff15d55bb506b4bc8196f143133d8b5 (patch) | |
| tree | e4f35aadbd0f107ecbc30b72b014c4b383a74258 /clang/lib/Basic/SourceManager.cpp | |
| parent | 44977a155f24be3cdbcd2a57acbfd6da2529abde (diff) | |
| download | llvm-aa250ceb3ff15d55bb506b4bc8196f143133d8b5.zip llvm-aa250ceb3ff15d55bb506b4bc8196f143133d8b5.tar.gz llvm-aa250ceb3ff15d55bb506b4bc8196f143133d8b5.tar.bz2 | |
Add optimizations for icmp eq/ne (mul(X, Y), 0)
1. Add checks if X and/or Y are odd. The Odd values are unnecessary to
the icmp: isZero(Odd * N) == isZero(N)
2. If neither X nor Y is known odd, then if X * Y cannot overflow AND
if X and/or Y is non-zero, the non-zero values are unnecessary to the
icmp.
Reviewed By: nikic
Differential Revision: https://reviews.llvm.org/D140850
Diffstat (limited to 'clang/lib/Basic/SourceManager.cpp')
0 files changed, 0 insertions, 0 deletions