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| author | Chris Lattner <sabre@nondot.org> | 2005-05-13 21:50:27 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-05-13 21:50:27 +0000 |
| commit | 79e9fa5de11594ac93dd040eb34a5fc4e1669726 (patch) | |
| tree | e0f73be7461f987a0869f560fabe7b06cfa21c47 /llvm/lib | |
| parent | 7d387d207d5225456a3936ba5a1f4c317539dcad (diff) | |
| download | bcm5719-llvm-79e9fa5de11594ac93dd040eb34a5fc4e1669726.tar.gz bcm5719-llvm-79e9fa5de11594ac93dd040eb34a5fc4e1669726.zip | |
Don't emit SAR X, 0 in the case of sdiv Y, 2
llvm-svn: 21986
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelPattern.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/llvm/lib/Target/X86/X86ISelPattern.cpp b/llvm/lib/Target/X86/X86ISelPattern.cpp index fcea635d47b..ba3644341cd 100644 --- a/llvm/lib/Target/X86/X86ISelPattern.cpp +++ b/llvm/lib/Target/X86/X86ISelPattern.cpp @@ -2699,8 +2699,13 @@ unsigned ISel::SelectExpr(SDOperand N) { } unsigned RegSize = MVT::getSizeInBits(N.getValueType()); Tmp1 = SelectExpr(N.getOperand(0)); - unsigned TmpReg = MakeReg(N.getValueType()); - BuildMI(BB, SAROpc, 2, TmpReg).addReg(Tmp1).addImm(Log-1); + unsigned TmpReg; + if (Log != 1) { + TmpReg = MakeReg(N.getValueType()); + BuildMI(BB, SAROpc, 2, TmpReg).addReg(Tmp1).addImm(Log-1); + } else { + TmpReg = Tmp1; + } unsigned TmpReg2 = MakeReg(N.getValueType()); BuildMI(BB, SHROpc, 2, TmpReg2).addReg(TmpReg).addImm(RegSize-Log); unsigned TmpReg3 = MakeReg(N.getValueType()); |
