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Fix ldrd / strd address mode matching code. It allows for +/- 8 bit offset. Also change the printer to make the scale 4 explicit.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75181 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2009-07-09 22:21:59 +00:00
parent 7b9547089f
commit 5c874172ac
3 changed files with 22 additions and 3 deletions
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3
lib/Target/ARM/ARMISelDAGToDAG.cpp
View File

@ -661,7 +661,8 @@ bool ARMDAGToDAGISel::SelectT2AddrModeImm8s4(SDValue Op, SDValue N,
if (N.getOpcode() == ISD::ADD) {
if (ConstantSDNode *RHS = dyn_cast<ConstantSDNode>(N.getOperand(1))) {
int RHSC = (int)RHS->getZExtValue();
if (((RHSC & 0x3) == 0) && (RHSC < 0 && RHSC > -0x400)) { // 8 bits.
if (((RHSC & 0x3) == 0) &&
((RHSC >= 0 && RHSC < 0x400) || (RHSC < 0 && RHSC > -0x400))) { // 8 bits.
Base = N.getOperand(0);
OffImm = CurDAG->getTargetConstant(RHSC, MVT::i32);
return true;

5
lib/Target/ARM/ARMInstrThumb2.td
View File

@ -111,10 +111,10 @@ def t2am_imm8_offset : Operand<i32>,
let PrintMethod = "printT2AddrModeImm8OffsetOperand";
}
// t2addrmode_imm8s4 := reg + (imm8 << 2)
// t2addrmode_imm8s4 := reg +/- (imm8 << 2)
def t2addrmode_imm8s4 : Operand<i32>,
ComplexPattern<i32, 2, "SelectT2AddrModeImm8s4", []> {
let PrintMethod = "printT2AddrModeImm8Operand";
let PrintMethod = "printT2AddrModeImm8s4Operand";
let MIOperandInfo = (ops GPR:$base, i32imm:$offsimm);
}
@ -661,6 +661,7 @@ def t2PICSTRH : T2I_picst<"strh", BinOpFrag<(truncstorei16 node:$LHS, node:$RHS
def t2PICSTRB : T2I_picst<"strb", BinOpFrag<(truncstorei8 node:$LHS, node:$RHS)>>;
} // isNotDuplicable = 1, AddedComplexity = 10
// FIXME: ldrd / strd pre / post variants
//===----------------------------------------------------------------------===//
// Load / store multiple Instructions.

17
lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
View File

@ -122,6 +122,7 @@ namespace {
void printT2SOOperand(const MachineInstr *MI, int OpNum);
void printT2AddrModeImm12Operand(const MachineInstr *MI, int OpNum);
void printT2AddrModeImm8Operand(const MachineInstr *MI, int OpNum);
void printT2AddrModeImm8s4Operand(const MachineInstr *MI, int OpNum);
void printT2AddrModeImm8OffsetOperand(const MachineInstr *MI, int OpNum);
void printT2AddrModeSoRegOperand(const MachineInstr *MI, int OpNum);
@ -739,6 +740,22 @@ void ARMAsmPrinter::printT2AddrModeImm8Operand(const MachineInstr *MI,
O << "]";
}
void ARMAsmPrinter::printT2AddrModeImm8s4Operand(const MachineInstr *MI,
int OpNum) {
const MachineOperand &MO1 = MI->getOperand(OpNum);
const MachineOperand &MO2 = MI->getOperand(OpNum+1);
O << "[" << TM.getRegisterInfo()->get(MO1.getReg()).AsmName;
int32_t OffImm = (int32_t)MO2.getImm() / 4;
// Don't print +0.
if (OffImm < 0)
O << ", #-" << -OffImm << " * 4";
else if (OffImm > 0)
O << ", #+" << OffImm << " * 4";
O << "]";
}
void ARMAsmPrinter::printT2AddrModeImm8OffsetOperand(const MachineInstr *MI,
int OpNum) {
const MachineOperand &MO1 = MI->getOperand(OpNum);