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Allow [ fi#c, imm ] as ARM load / store addresses. 

llvm-svn: 33474
This commit is contained in:
Evan Cheng 2007-01-24 02:45:25 +00:00
parent dda311a784
commit 8942551dee
1 changed files with 39 additions and 25 deletions
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64
llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp
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@ -122,17 +122,21 @@ bool ARMDAGToDAGISel::SelectAddrMode2(SDOperand Op, SDOperand N,
if (N.getOpcode() == ISD::ADD)
if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
int RHSC = (int)RHS->getValue();
if (RHSC >= 0 && RHSC < 0x1000) { // 12 bits.
if ((RHSC >= 0 && RHSC < 0x1000) ||
(RHSC < 0 && RHSC > -0x1000)) { // 12 bits.
Base = N.getOperand(0);
if (Base.getOpcode() == ISD::FrameIndex) {
int FI = cast<FrameIndexSDNode>(Base)->getIndex();
Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy());
}
Offset = CurDAG->getRegister(0, MVT::i32);
Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(ARM_AM::add, RHSC,
ARM_AM::no_shift),
MVT::i32);
return true;
} else if (RHSC < 0 && RHSC > -0x1000) {
Base = N.getOperand(0);
Offset = CurDAG->getRegister(0, MVT::i32);
Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(ARM_AM::sub, -RHSC,
ARM_AM::AddrOpc AddSub = ARM_AM::add;
if (RHSC < 0) {
AddSub = ARM_AM::sub;
RHSC = - RHSC;
}
Opc = CurDAG->getTargetConstant(ARM_AM::getAM2Opc(AddSub, RHSC,
ARM_AM::no_shift),
MVT::i32);
return true;
@ -245,17 +249,21 @@ bool ARMDAGToDAGISel::SelectAddrMode3(SDOperand Op, SDOperand N,
// If the RHS is +/- imm8, fold into addr mode.
if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
int RHSC = (int)RHS->getValue();
if (RHSC >= 0 && RHSC < 256) {
if ((RHSC >= 0 && RHSC < 256) ||
(RHSC < 0 && RHSC > -256)) { // note -256 itself isn't allowed.
Base = N.getOperand(0);
if (Base.getOpcode() == ISD::FrameIndex) {
int FI = cast<FrameIndexSDNode>(Base)->getIndex();
Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy());
}
Offset = CurDAG->getRegister(0, MVT::i32);
Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(ARM_AM::add, RHSC),
MVT::i32);
return true;
} else if (RHSC < 0 && RHSC > -256) { // note -256 itself isn't allowed.
Base = N.getOperand(0);
Offset = CurDAG->getRegister(0, MVT::i32);
Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(ARM_AM::sub, -RHSC),
MVT::i32);
ARM_AM::AddrOpc AddSub = ARM_AM::add;
if (RHSC < 0) {
AddSub = ARM_AM::sub;
RHSC = - RHSC;
}
Opc = CurDAG->getTargetConstant(ARM_AM::getAM3Opc(AddSub, RHSC),MVT::i32);
return true;
}
}
@ -309,14 +317,20 @@ bool ARMDAGToDAGISel::SelectAddrMode5(SDOperand Op, SDOperand N,
int RHSC = (int)RHS->getValue();
if ((RHSC & 3) == 0) { // The constant is implicitly multiplied by 4.
RHSC >>= 2;
if (RHSC >= 0 && RHSC < 256) {
if ((RHSC >= 0 && RHSC < 256) ||
(RHSC < 0 && RHSC > -256)) { // note -256 itself isn't allowed.
Base = N.getOperand(0);
Offset = CurDAG->getTargetConstant(ARM_AM::getAM5Opc(ARM_AM::add, RHSC),
MVT::i32);
return true;
} else if (RHSC < 0 && RHSC > -256) { // note -256 itself isn't allowed.
Base = N.getOperand(0);
Offset = CurDAG->getTargetConstant(ARM_AM::getAM5Opc(ARM_AM::sub,-RHSC),
if (Base.getOpcode() == ISD::FrameIndex) {
int FI = cast<FrameIndexSDNode>(Base)->getIndex();
Base = CurDAG->getTargetFrameIndex(FI, TLI.getPointerTy());
}
ARM_AM::AddrOpc AddSub = ARM_AM::add;
if (RHSC < 0) {
AddSub = ARM_AM::sub;
RHSC = - RHSC;
}
Offset = CurDAG->getTargetConstant(ARM_AM::getAM5Opc(AddSub, RHSC),
MVT::i32);
return true;
}