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| author | Chris Lattner <sabre@nondot.org> | 2007-11-22 23:47:13 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-11-22 23:47:13 +0000 |
| commit | 1985d96dc9323741a9f579a1929c0e044db073e6 (patch) | |
| tree | ee3c3574b9f0369443fb06b6bc01512f07b8a98c /llvm/lib/Transforms/Scalar/InstructionCombining.cpp | |
| parent | a717ce7c70370edfd67a74f9e662659ad3814dc9 (diff) | |
| download | bcm5719-llvm-1985d96dc9323741a9f579a1929c0e044db073e6.tar.gz bcm5719-llvm-1985d96dc9323741a9f579a1929c0e044db073e6.zip | |
Fix PR1817.
llvm-svn: 44284
Diffstat (limited to 'llvm/lib/Transforms/Scalar/InstructionCombining.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/InstructionCombining.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp index e8cd86778ae..c8df4128643 100644 --- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp @@ -3463,7 +3463,12 @@ Instruction *InstCombiner::visitAnd(BinaryOperator &I) { LHSCC != ICmpInst::ICMP_UGE && LHSCC != ICmpInst::ICMP_ULE && RHSCC != ICmpInst::ICMP_UGE && RHSCC != ICmpInst::ICMP_ULE && LHSCC != ICmpInst::ICMP_SGE && LHSCC != ICmpInst::ICMP_SLE && - RHSCC != ICmpInst::ICMP_SGE && RHSCC != ICmpInst::ICMP_SLE) { + RHSCC != ICmpInst::ICMP_SGE && RHSCC != ICmpInst::ICMP_SLE && + + // Don't try to fold ICMP_SLT + ICMP_ULT. + (ICmpInst::isEquality(LHSCC) || ICmpInst::isEquality(RHSCC) || + ICmpInst::isSignedPredicate(LHSCC) == + ICmpInst::isSignedPredicate(RHSCC))) { // Ensure that the larger constant is on the RHS. ICmpInst::Predicate GT = ICmpInst::isSignedPredicate(LHSCC) ? ICmpInst::ICMP_SGT : ICmpInst::ICMP_UGT; |
