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Allow use of the 16-bit literal move instruction in CMOVs for ARM mode.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115884 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2010-10-07 00:42:42 +00:00
parent 1bb9adae4c
commit 3bbdcea49a
4 changed files with 32 additions and 17 deletions
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18
lib/Target/ARM/ARMISelDAGToDAG.cpp
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@@ -193,7 +193,7 @@ private:
SDNode *SelectT2CMOVSoImmOp(SDNode *N, SDValue FalseVal, SDValue TrueVal,
ARMCC::CondCodes CCVal, SDValue CCR,
SDValue InFlag);
SDNode *SelectARMCMOVSoImmOp(SDNode *N, SDValue FalseVal, SDValue TrueVal,
SDNode *SelectARMCMOVImmOp(SDNode *N, SDValue FalseVal, SDValue TrueVal,
ARMCC::CondCodes CCVal, SDValue CCR,
SDValue InFlag);
@@ -1521,18 +1521,20 @@ SelectT2CMOVSoImmOp(SDNode *N, SDValue FalseVal, SDValue TrueVal,
}
SDNode *ARMDAGToDAGISel::
SelectARMCMOVSoImmOp(SDNode *N, SDValue FalseVal, SDValue TrueVal,
SelectARMCMOVImmOp(SDNode *N, SDValue FalseVal, SDValue TrueVal,
ARMCC::CondCodes CCVal, SDValue CCR, SDValue InFlag) {
ConstantSDNode *T = dyn_cast<ConstantSDNode>(TrueVal);
if (!T)
return 0;
if (Pred_so_imm(TrueVal.getNode())) {
SDValue True = CurDAG->getTargetConstant(T->getZExtValue(), MVT::i32);
unsigned TrueImm = T->getZExtValue();
bool isSoImm = Pred_so_imm(TrueVal.getNode());
if (isSoImm || (Subtarget->hasV6T2Ops() && TrueImm <= 0xffff)) {
SDValue True = CurDAG->getTargetConstant(TrueImm, MVT::i32);
SDValue CC = CurDAG->getTargetConstant(CCVal, MVT::i32);
SDValue Ops[] = { FalseVal, True, CC, CCR, InFlag };
return CurDAG->SelectNodeTo(N,
ARM::MOVCCi, MVT::i32, Ops, 5);
return CurDAG->SelectNodeTo(N, (isSoImm ? ARM::MOVCCi : ARM::MOVCCi16),
MVT::i32, Ops, 5);
}
return 0;
}
@@ -1589,10 +1591,10 @@ SDNode *ARMDAGToDAGISel::SelectCMOVOp(SDNode *N) {
if (Res)
return Res;
} else {
SDNode *Res = SelectARMCMOVSoImmOp(N, FalseVal, TrueVal,
SDNode *Res = SelectARMCMOVImmOp(N, FalseVal, TrueVal,
CCVal, CCR, InFlag);
if (!Res)
Res = SelectARMCMOVSoImmOp(N, TrueVal, FalseVal,
Res = SelectARMCMOVImmOp(N, TrueVal, FalseVal,
ARMCC::getOppositeCondition(CCVal), CCR, InFlag);
if (Res)
return Res;