diff --git a/lib/Target/ARM/ARMISelDAGToDAG.cpp b/lib/Target/ARM/ARMISelDAGToDAG.cpp index 1ed9e8080a2..d3c3047fc9a 100644 --- a/lib/Target/ARM/ARMISelDAGToDAG.cpp +++ b/lib/Target/ARM/ARMISelDAGToDAG.cpp @@ -579,17 +579,18 @@ SDNode *ARMDAGToDAGISel::Select(SDValue Op) { switch (N->getOpcode()) { default: break; case ISD::Constant: { - // ARMv6T2 and later should materialize imms via MOV / MOVT pair. - if (Subtarget->hasV6T2Ops() || Subtarget->hasThumb2()) - break; - unsigned Val = cast(N)->getZExtValue(); bool UseCP = true; - if (Subtarget->isThumb()) - UseCP = (Val > 255 && // MOV - ~Val > 255 && // MOV + MVN - !ARM_AM::isThumbImmShiftedVal(Val)); // MOV + LSL - else + 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 + 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.