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| author | Chris Lattner <sabre@nondot.org> | 2006-11-10 23:38:52 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2006-11-10 23:38:52 +0000 |
| commit | d4dee405cbe030806fec016499e9e90d55062a55 (patch) | |
| tree | 78dc67a952f16867c9622d78c892aaff475c2627 /llvm/lib | |
| parent | d530a503dabae82c6214a4ae5155e351eb4c44af (diff) | |
| download | bcm5719-llvm-d4dee405cbe030806fec016499e9e90d55062a55.tar.gz bcm5719-llvm-d4dee405cbe030806fec016499e9e90d55062a55.zip | |
Fix InstCombine/2006-11-10-ashr-miscompile.ll a miscompilation introduced
by the shr -> [al]shr patch. This was reduced from 176.gcc.
llvm-svn: 31653
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/InstructionCombining.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp index 65ebf641d6f..f636442bb7f 100644 --- a/llvm/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/llvm/lib/Transforms/Scalar/InstructionCombining.cpp @@ -5082,10 +5082,10 @@ Instruction *InstCombiner::visitShiftInst(ShiftInst &I) { return ReplaceInstUsesWith(I, Op0); // X >>s undef -> X } - // shr int -1, X = -1 (for any arithmetic shift rights of ~0) - if (!isLeftShift) + // ashr int -1, X = -1 (for any arithmetic shift rights of ~0) + if (I.getOpcode() == Instruction::AShr) if (ConstantInt *CSI = dyn_cast<ConstantInt>(Op0)) - if (CSI->isAllOnesValue() && Op0->getType()->isSigned()) + if (CSI->isAllOnesValue()) return ReplaceInstUsesWith(I, CSI); // Try to fold constant and into select arguments. |
