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| author | Dan Gohman <gohman@apple.com> | 2008-09-11 00:25:00 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-09-11 00:25:00 +0000 |
| commit | 7f85fbd9de5a4bb1474075b46eb3a8246ea5220d (patch) | |
| tree | 02718e4f6d77999aeb13b351dda3c94a106fa639 | |
| parent | 1df3fd66835453a5516fe3336cd725778b39be97 (diff) | |
In my analysis for r56076 I missed the case where the original
multiplication overflows.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56082 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 8f578200d6..46ac762b0a 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -5789,7 +5789,8 @@ Instruction *InstCombiner::FoldICmpDivCst(ICmpInst &ICI, BinaryOperator *DivI, // e.g. X/-5 op -3 --> [15, 20) LoBound = Prod; LoOverflow = HiOverflow = ProdOV ? 1 : 0; - HiOverflow = SubWithOverflow(HiBound, Prod, DivRHS, true); + if (!HiOverflow) + HiOverflow = SubWithOverflow(HiBound, Prod, DivRHS, true); } // Dividing by a negative swaps the condition. LT <-> GT |