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| author | Craig Topper <craig.topper@gmail.com> | 2017-04-06 04:02:28 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2017-04-06 04:02:28 +0000 |
| commit | faf5a8553c024e42e2eb08ef02829146a4a9094d (patch) | |
| tree | 2f10a1d9f6db224b349e1a9bb63cbde7d544370e /llvm/lib/CodeGen/SelectionDAG | |
| parent | 0d622a4bf9035bfd55c29b511c5acd2d23ea62ad (diff) | |
| download | bcm5719-llvm-faf5a8553c024e42e2eb08ef02829146a4a9094d.tar.gz bcm5719-llvm-faf5a8553c024e42e2eb08ef02829146a4a9094d.zip | |
foo
llvm-svn: 299618
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp index d3ccdcd5ffd..753e5281bfc 100644 --- a/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp @@ -791,6 +791,9 @@ bool TargetLowering::SimplifyDemandedBits(SDValue Op, // TODO: Should we check for other forms of sign-bit comparisons? // Examples: X <= -1, X >= 0 } + if (getBooleanContents(Op.getOperand(0).getValueType()) == + BooleanContent::ZeroOrOneBooleanContent && BitWidth > 1) + KnownZero.setBitsFrom(1); break; } case ISD::SHL: |
