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| author | Eli Friedman <eli.friedman@gmail.com> | 2010-09-15 20:08:03 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2010-09-15 20:08:03 +0000 |
| commit | 39e30124e50534972c2e58f4dab7d67c0c437743 (patch) | |
| tree | 59b24fd99818b00bf4ee5e5627341252763b7b6b /lib/Analysis/BasicAliasAnalysis.cpp | |
| parent | f1c3eb37ae96572e1df34bf980b9ecd149b5ee33 (diff) | |
| download | external_llvm-39e30124e50534972c2e58f4dab7d67c0c437743.zip external_llvm-39e30124e50534972c2e58f4dab7d67c0c437743.tar.gz external_llvm-39e30124e50534972c2e58f4dab7d67c0c437743.tar.bz2 | |
PR7959: Handle negative scales in GEPs correctly in BasicAA for non-64-bit
targets.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114015 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/BasicAliasAnalysis.cpp')
| -rw-r--r-- | lib/Analysis/BasicAliasAnalysis.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp index 69a1c0c..32a1726 100644 --- a/lib/Analysis/BasicAliasAnalysis.cpp +++ b/lib/Analysis/BasicAliasAnalysis.cpp @@ -386,8 +386,8 @@ DecomposeGEPExpression(const Value *V, int64_t &BaseOffs, // The GEP index scale ("Scale") scales C1*V+C2, yielding (C1*V+C2)*Scale. // This gives us an aggregate computation of (C1*Scale)*V + C2*Scale. - BaseOffs += IndexOffset.getZExtValue()*Scale; - Scale *= IndexScale.getZExtValue(); + BaseOffs += IndexOffset.getSExtValue()*Scale; + Scale *= IndexScale.getSExtValue(); // If we already had an occurrance of this index variable, merge this @@ -407,7 +407,7 @@ DecomposeGEPExpression(const Value *V, int64_t &BaseOffs, // pointer size. if (unsigned ShiftBits = 64-TD->getPointerSizeInBits()) { Scale <<= ShiftBits; - Scale >>= ShiftBits; + Scale = (int64_t)Scale >> ShiftBits; } if (Scale) { |