add MCInstLower support for lowering ARM::PICADD, a pseudo op for pic stuffola.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84553 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
index 4685c0e..1394772 100644
--- a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
@@ -1313,6 +1313,7 @@
void ARMAsmPrinter::printInstructionThroughMCStreamer(const MachineInstr *MI) {
ARMMCInstLower MCInstLowering(OutContext, *Mang, getFunctionNumber(), *MAI);
switch (MI->getOpcode()) {
+ default: break;
case TargetInstrInfo::DBG_LABEL:
case TargetInstrInfo::EH_LABEL:
case TargetInstrInfo::GC_LABEL:
@@ -1327,7 +1328,29 @@
case TargetInstrInfo::IMPLICIT_DEF:
printImplicitDef(MI);
return;
- default: break;
+ case ARM::PICADD: { // FIXME: Remove asm string from td file.
+ // This is a pseudo op for a label + instruction sequence, which looks like:
+ // LPC0:
+ // add r0, pc, r0
+ // This adds the address of LPC0 to r0.
+
+ // Emit the label.
+ // FIXME: MOVE TO SHARED PLACE.
+ SmallString<60> Name;
+ int Id = (int)MI->getOperand(2).getImm();
+ raw_svector_ostream(Name) << MAI->getPrivateGlobalPrefix() << "PC" << Id;
+ OutStreamer.EmitLabel(OutContext.GetOrCreateSymbol(Name.str()));
+
+
+ // Form and emit tha dd.
+ MCInst AddInst;
+ AddInst.setOpcode(ARM::ADDrr);
+ AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));
+ AddInst.addOperand(MCOperand::CreateReg(ARM::PC));
+ AddInst.addOperand(MCOperand::CreateReg(MI->getOperand(1).getReg()));
+ printMCInst(&AddInst);
+ return;
+ }
}
MCInst TmpInst;