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expand PICLDR MC lowering to handle other PICLDR and PICSTR versions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114183 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2010-09-17 16:25:52 +00:00
parent 23bea41ec6
commit a28abbe245
1 changed files with 31 additions and 11 deletions
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42
lib/Target/ARM/ARMAsmPrinter.cpp
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@ -1351,10 +1351,17 @@ void ARMAsmPrinter::printInstructionThroughMCStreamer(const MachineInstr *MI) {
OutStreamer.EmitInstruction(AddInst);
return;
}
case ARM::PICLDR: {
case ARM::PICSTR:
case ARM::PICSTRB:
case ARM::PICSTRH:
case ARM::PICLDR:
case ARM::PICLDRB:
case ARM::PICLDRH:
case ARM::PICLDRSB:
case ARM::PICLDRSH: {
// This is a pseudo op for a label + instruction sequence, which looks like:
// LPC0:
// ldr r0, [pc, r0]
// OP r0, [pc, r0]
// The LCP0 label is referenced by a constant pool entry in order to get
// a PC-relative address at the ldr instruction.
@ -1367,16 +1374,29 @@ void ARMAsmPrinter::printInstructionThroughMCStreamer(const MachineInstr *MI) {
OutStreamer.EmitLabel(Label);
// Form and emit the load
MCInst LdrInst;
LdrInst.setOpcode(ARM::LDR);
LdrInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
LdrInst.addOperand(MCOperand::CreateReg(ARM::PC));
LdrInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
LdrInst.addOperand(MCOperand::CreateImm(0));
unsigned Opcode;
switch (MI->getOpcode()) {
default:
llvm_unreachable("Unexpected opcode!");
case ARM::PICSTR: Opcode = ARM::STR; break;
case ARM::PICSTRB: Opcode = ARM::STRB; break;
case ARM::PICSTRH: Opcode = ARM::STRH; break;
case ARM::PICLDR: Opcode = ARM::LDR; break;
case ARM::PICLDRB: Opcode = ARM::LDRB; break;
case ARM::PICLDRH: Opcode = ARM::LDRH; break;
case ARM::PICLDRSB: Opcode = ARM::LDRSB; break;
case ARM::PICLDRSH: Opcode = ARM::LDRSH; break;
}
MCInst LdStInst;
LdStInst.setOpcode(Opcode);
LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
LdStInst.addOperand(MCOperand::CreateReg(ARM::PC));
LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
LdStInst.addOperand(MCOperand::CreateImm(0));
// Add predicate operands.
LdrInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
LdrInst.addOperand(MCOperand::CreateReg(MI->getOperand(4).getReg()));
OutStreamer.EmitInstruction(LdrInst);
LdStInst.addOperand(MCOperand::CreateImm(MI->getOperand(3).getImm()));
LdStInst.addOperand(MCOperand::CreateReg(MI->getOperand(4).getReg()));
OutStreamer.EmitInstruction(LdStInst);
return;
}