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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 | 45408eab89c4239612ebb90937bd73d38dd1b305 (patch) | |
| tree | 02718e4f6d77999aeb13b351dda3c94a106fa639 /lib | |
| parent | b80d5614b02a56709f72656df8ace6415ab64f4a (diff) | |
| download | external_llvm-45408eab89c4239612ebb90937bd73d38dd1b305.zip external_llvm-45408eab89c4239612ebb90937bd73d38dd1b305.tar.gz external_llvm-45408eab89c4239612ebb90937bd73d38dd1b305.tar.bz2 | |
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
Diffstat (limited to 'lib')
| -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 8f57820..46ac762 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 |