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| author | Dan Gohman <gohman@apple.com> | 2010-06-30 06:58:35 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2010-06-30 06:58:35 +0000 |
| commit | 9396b42ca4518bdf410351ee9c2305a39a5d1a58 (patch) | |
| tree | 3f3f4925912d64c5f283c50166b66d4363e7d43b /llvm/lib | |
| parent | 120a1e9d0fc2f1625482df789c47b979b3f2a73f (diff) | |
| download | bcm5719-llvm-9396b42ca4518bdf410351ee9c2305a39a5d1a58.tar.gz bcm5719-llvm-9396b42ca4518bdf410351ee9c2305a39a5d1a58.zip | |
When computing a new ConservativeResult, intersect it with
the old one instead of replacing it, to be more precise.
llvm-svn: 107256
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Analysis/ScalarEvolution.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp index b5acd6bfd6e..240126eef8c 100644 --- a/llvm/lib/Analysis/ScalarEvolution.cpp +++ b/llvm/lib/Analysis/ScalarEvolution.cpp @@ -2958,7 +2958,8 @@ ScalarEvolution::getUnsignedRange(const SCEV *S) { if (const SCEVConstant *C = dyn_cast<SCEVConstant>(AddRec->getStart())) if (!C->getValue()->isZero()) ConservativeResult = - ConstantRange(C->getValue()->getValue(), APInt(BitWidth, 0)); + ConservativeResult.intersectWith( + ConstantRange(C->getValue()->getValue(), APInt(BitWidth, 0))); // TODO: non-affine addrec if (AddRec->isAffine()) { |
