diff options
Diffstat (limited to 'lib/Target/ARM/ARMISelDAGToDAG.cpp')
| -rw-r--r-- | lib/Target/ARM/ARMISelDAGToDAG.cpp | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/lib/Target/ARM/ARMISelDAGToDAG.cpp b/lib/Target/ARM/ARMISelDAGToDAG.cpp index a37c7c5a02..d165a09997 100644 --- a/lib/Target/ARM/ARMISelDAGToDAG.cpp +++ b/lib/Target/ARM/ARMISelDAGToDAG.cpp @@ -934,19 +934,21 @@ SDNode *ARMDAGToDAGISel::Select(SDValue Op) { case ISD::Constant: { unsigned Val = cast<ConstantSDNode>(N)->getZExtValue(); bool UseCP = true; - if (Subtarget->isThumb()) { - if (Subtarget->hasThumb2()) - // Thumb2 has the MOVT instruction, so all immediates can - // be done with MOV + MOVT, at worst. - UseCP = 0; - else + if (Subtarget->hasThumb2()) + // Thumb2-aware targets have the MOVT instruction, so all immediates can + // be done with MOV + MOVT, at worst. + UseCP = 0; + else { + if (Subtarget->isThumb()) { UseCP = (Val > 255 && // MOV ~Val > 255 && // MOV + MVN !ARM_AM::isThumbImmShiftedVal(Val)); // MOV + LSL - } else - UseCP = (ARM_AM::getSOImmVal(Val) == -1 && // MOV - ARM_AM::getSOImmVal(~Val) == -1 && // MVN - !ARM_AM::isSOImmTwoPartVal(Val)); // two instrs. + } else + UseCP = (ARM_AM::getSOImmVal(Val) == -1 && // MOV + ARM_AM::getSOImmVal(~Val) == -1 && // MVN + !ARM_AM::isSOImmTwoPartVal(Val)); // two instrs. + } + if (UseCP) { SDValue CPIdx = CurDAG->getTargetConstantPool(ConstantInt::get( |