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Simplify the ZIV tester to the max.

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As suggested by Nick Lewycky.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78277 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andreas Bolka 2009-08-06 03:10:33 +00:00
parent e90acceb50
commit 6151f67285
1 changed files with 2 additions and 3 deletions
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5
lib/Analysis/LoopDependenceAnalysis.cpp
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@ -144,9 +144,8 @@ LoopDependenceAnalysis::DependenceResult
LoopDependenceAnalysis::analyseZIV(const SCEV *A,
const SCEV *B,
Subscript *S) const {
assert(isZIVPair(A, B));
const SCEV *diff = SE->getMinusSCEV(A, B);
return diff->isZero() ? Dependent : Independent;
assert(isZIVPair(A, B) && "Attempted to ZIV-test non-ZIV SCEVs!");
return A == B ? Dependent : Independent;
}
LoopDependenceAnalysis::DependenceResult