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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2015-10-24 11:38:01 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2015-10-24 11:38:01 +0000 |
| commit | 557b601b0862dc55cf94defe1ecd5e4732b9a385 (patch) | |
| tree | aee921ec5a7fc76f4cd073bf339b36c9fd6a28ce /llvm/lib/Analysis/BasicAliasAnalysis.cpp | |
| parent | 5dad7c1d4c41cd7e9ecce648de2c8f3f4226b9cb (diff) | |
| download | llvm-557b601b0862dc55cf94defe1ecd5e4732b9a385.zip llvm-557b601b0862dc55cf94defe1ecd5e4732b9a385.tar.gz llvm-557b601b0862dc55cf94defe1ecd5e4732b9a385.tar.bz2 | |
[BasicAliasAnalysis] Simplify expression, no functional change.
(-1) - x + 1 is the same as -x.
llvm-svn: 251185
Diffstat (limited to 'llvm/lib/Analysis/BasicAliasAnalysis.cpp')
| -rw-r--r-- | llvm/lib/Analysis/BasicAliasAnalysis.cpp | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/llvm/lib/Analysis/BasicAliasAnalysis.cpp b/llvm/lib/Analysis/BasicAliasAnalysis.cpp index 59b2953..bdefc1f 100644 --- a/llvm/lib/Analysis/BasicAliasAnalysis.cpp +++ b/llvm/lib/Analysis/BasicAliasAnalysis.cpp @@ -1538,11 +1538,10 @@ bool BasicAAResult::constantOffsetHeuristic( // If we've been sext'ed then zext'd the maximum difference between Var0 and // Var1 is possible to calculate, but we're just interested in the absolute - // minumum difference between the two. The minimum distance may occur due to + // minimum difference between the two. The minimum distance may occur due to // wrapping; consider "add i3 %i, 5": if %i == 7 then 7 + 5 mod 8 == 4, and so // the minimum distance between %i and %i + 5 is 3. - APInt MinDiff = V0Offset - V1Offset, - Wrapped = APInt::getMaxValue(Width) - MinDiff + APInt(Width, 1); + APInt MinDiff = V0Offset - V1Offset, Wrapped = -MinDiff; MinDiff = APIntOps::umin(MinDiff, Wrapped); uint64_t MinDiffBytes = MinDiff.getZExtValue() * std::abs(Var0.Scale); |