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| author | Dan Gohman <gohman@apple.com> | 2009-04-27 01:41:10 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-04-27 01:41:10 +0000 |
| commit | d6c329532bed7a60f760b3a009b3582c624bc270 (patch) | |
| tree | be03175da682845c2982d401fa3dcb63b48d190b /lib/Analysis/ScalarEvolution.cpp | |
| parent | 0324205bbb0ea8fb70e2bdfd5ea201c3a5fc24ec (diff) | |
Handle ands with ~0 correctly too. This fixes PR4052.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70176 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ScalarEvolution.cpp')
| -rw-r--r-- | lib/Analysis/ScalarEvolution.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index 495290d8d7..a9521bb581 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/lib/Analysis/ScalarEvolution.cpp @@ -1756,6 +1756,8 @@ SCEVHandle ScalarEvolution::createSCEV(Value *V) { if (ConstantInt *CI = dyn_cast<ConstantInt>(U->getOperand(1))) { if (CI->isNullValue()) return getSCEV(U->getOperand(1)); + if (CI->isAllOnesValue()) + return getSCEV(U->getOperand(0)); const APInt &A = CI->getValue(); unsigned Ones = A.countTrailingOnes(); if (APIntOps::isMask(Ones, A)) |