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| author | Kazu Hirata <kazu@google.com> | 2025-03-31 23:17:44 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-03-31 23:17:44 -0700 |
| commit | fe3e9c2b46504e7b197245b3946abfec563e77d4 (patch) | |
| tree | 8b1d058bcc0434919763839756dd3f97894ce7ec /llvm/lib | |
| parent | d3be29642fa65e5ade434d860cfcc193f8278d4e (diff) | |
| download | llvm-fe3e9c2b46504e7b197245b3946abfec563e77d4.zip llvm-fe3e9c2b46504e7b197245b3946abfec563e77d4.tar.gz llvm-fe3e9c2b46504e7b197245b3946abfec563e77d4.tar.bz2 | |
[Analysis] Avoid repeated hash lookups (NFC) (#133045)
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Analysis/ScalarEvolution.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp index 3612067..14f9a1b 100644 --- a/llvm/lib/Analysis/ScalarEvolution.cpp +++ b/llvm/lib/Analysis/ScalarEvolution.cpp @@ -15440,9 +15440,9 @@ void ScalarEvolution::LoopGuards::collectFromBlock( // Bail out, unless we have a non-wrapping, monotonic range. if (ExactRegion.isWrappedSet() || ExactRegion.isFullSet()) return false; - auto I = RewriteMap.find(LHSUnknown); - const SCEV *RewrittenLHS = I != RewriteMap.end() ? I->second : LHSUnknown; - RewriteMap[LHSUnknown] = SE.getUMaxExpr( + auto [I, Inserted] = RewriteMap.try_emplace(LHSUnknown); + const SCEV *RewrittenLHS = Inserted ? LHSUnknown : I->second; + I->second = SE.getUMaxExpr( SE.getConstant(ExactRegion.getUnsignedMin()), SE.getUMinExpr(RewrittenLHS, SE.getConstant(ExactRegion.getUnsignedMax()))); |