int AlphaCodeEmitter::getMachineOpValue(MachineInstr &MI, MachineOperand &MO) { int rv = 0; // Return value; defaults to 0 for unhandled cases // or things that get fixed up later by the JIT. if (MO.isRegister()) { rv = getAlphaRegNumber(MO.getReg()); } else if (MO.isImmediate()) { rv = MO.getImm(); } else if (MO.isGlobalAddress() || MO.isExternalSymbol() || MO.isConstantPoolIndex()) { DOUT << MO << " is a relocated op for " << MI << "\n"; unsigned Reloc = 0; int Offset = 0; bool useGOT = false; switch (MI.getOpcode()) { case Alpha::BSR: Reloc = Alpha::reloc_bsr; break; case Alpha::LDLr: case Alpha::LDQr: case Alpha::LDBUr: case Alpha::LDWUr: case Alpha::LDSr: case Alpha::LDTr: case Alpha::LDAr: case Alpha::STQr: case Alpha::STLr: case Alpha::STWr: case Alpha::STBr: case Alpha::STSr: case Alpha::STTr: Reloc = Alpha::reloc_gprellow; break; case Alpha::LDAHr: Reloc = Alpha::reloc_gprelhigh; break; case Alpha::LDQl: Reloc = Alpha::reloc_literal; useGOT = true; break; case Alpha::LDAg: case Alpha::LDAHg: Reloc = Alpha::reloc_gpdist; Offset = MI.getOperand(3).getImm(); break; default: assert(0 && "unknown relocatable instruction"); abort(); } if (MO.isGlobalAddress()) MCE.addRelocation(MachineRelocation::getGV(MCE.getCurrentPCOffset(), Reloc, MO.getGlobal(), Offset, isa<Function>(MO.getGlobal()), useGOT)); else if (MO.isExternalSymbol()) MCE.addRelocation(MachineRelocation::getExtSym(MCE.getCurrentPCOffset(), Reloc, MO.getSymbolName(), Offset, true)); else MCE.addRelocation(MachineRelocation::getConstPool(MCE.getCurrentPCOffset(), Reloc, MO.getIndex(), Offset)); } else if (MO.isMachineBasicBlock()) { MCE.addRelocation(MachineRelocation::getBB(MCE.getCurrentPCOffset(), Alpha::reloc_bsr, MO.getMBB())); }else { cerr << "ERROR: Unknown type of MachineOperand: " << MO << "\n"; abort(); } return rv; }