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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 | 8a18d6b48f9877dbb7fbb88cb294201b20b9fb05 (patch) | |
| tree | ad5f02d1fd5d69b7d0bc3ff781d8227ae108e576 /lib/Analysis/ScalarEvolution.cpp | |
| parent | 49bda917dbfbb09e2410272ebb1c6e4a2a3f45a2 (diff) | |
When computing a new ConservativeResult, intersect it with
the old one instead of replacing it, to be more precise.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107256 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ScalarEvolution.cpp')
| -rw-r--r-- | lib/Analysis/ScalarEvolution.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index b5acd6bfd6..240126eef8 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/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()) { |