1 //===-- AlphaAsmPrinter.cpp - Alpha LLVM assembly writer ------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains a printer that converts from our internal representation
11 // of machine-dependent LLVM code to GAS-format Alpha assembly language.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "asm-printer"
17 #include "AlphaInstrInfo.h"
18 #include "AlphaTargetMachine.h"
19 #include "llvm/Module.h"
20 #include "llvm/Type.h"
21 #include "llvm/Assembly/Writer.h"
22 #include "llvm/CodeGen/AsmPrinter.h"
23 #include "llvm/CodeGen/DwarfWriter.h"
24 #include "llvm/MC/MCStreamer.h"
25 #include "llvm/MC/MCAsmInfo.h"
26 #include "llvm/MC/MCSymbol.h"
27 #include "llvm/Target/TargetLoweringObjectFile.h"
28 #include "llvm/Target/TargetMachine.h"
29 #include "llvm/Target/TargetRegistry.h"
30 #include "llvm/Support/ErrorHandling.h"
31 #include "llvm/Support/FormattedStream.h"
35 struct AlphaAsmPrinter : public AsmPrinter {
36 /// Unique incrementer for label values for referencing Global values.
39 explicit AlphaAsmPrinter(formatted_raw_ostream &o, TargetMachine &tm,
40 MCContext &Ctx, MCStreamer &Streamer,
42 : AsmPrinter(o, tm, Ctx, Streamer, T) {}
44 virtual const char *getPassName() const {
45 return "Alpha Assembly Printer";
47 void printInstruction(const MachineInstr *MI);
48 void EmitInstruction(const MachineInstr *MI) {
52 static const char *getRegisterName(unsigned RegNo);
54 void printOp(const MachineOperand &MO, bool IsCallOp = false);
55 void printOperand(const MachineInstr *MI, int opNum);
56 void printBaseOffsetPair(const MachineInstr *MI, int i, bool brackets=true);
57 virtual void EmitFunctionBodyStart();
58 virtual void EmitFunctionBodyEnd();
59 void EmitStartOfAsmFile(Module &M);
61 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
62 unsigned AsmVariant, const char *ExtraCode);
63 bool PrintAsmMemoryOperand(const MachineInstr *MI,
66 const char *ExtraCode);
68 } // end of anonymous namespace
70 #include "AlphaGenAsmWriter.inc"
72 void AlphaAsmPrinter::printOperand(const MachineInstr *MI, int opNum)
74 const MachineOperand &MO = MI->getOperand(opNum);
75 if (MO.getType() == MachineOperand::MO_Register) {
76 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
78 O << getRegisterName(MO.getReg());
79 } else if (MO.isImm()) {
81 assert(MO.getImm() < (1 << 30));
88 void AlphaAsmPrinter::printOp(const MachineOperand &MO, bool IsCallOp) {
89 switch (MO.getType()) {
90 case MachineOperand::MO_Register:
91 O << getRegisterName(MO.getReg());
94 case MachineOperand::MO_Immediate:
95 llvm_unreachable("printOp() does not handle immediate values");
98 case MachineOperand::MO_MachineBasicBlock:
99 O << *MO.getMBB()->getSymbol(OutContext);
102 case MachineOperand::MO_ConstantPoolIndex:
103 O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
107 case MachineOperand::MO_ExternalSymbol:
108 O << MO.getSymbolName();
111 case MachineOperand::MO_GlobalAddress:
112 O << *GetGlobalValueSymbol(MO.getGlobal());
115 case MachineOperand::MO_JumpTableIndex:
116 O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
117 << '_' << MO.getIndex();
121 O << "<unknown operand type: " << MO.getType() << ">";
126 /// EmitFunctionBodyStart - Targets can override this to emit stuff before
127 /// the first basic block in the function.
128 void AlphaAsmPrinter::EmitFunctionBodyStart() {
129 O << "\t.ent " << *CurrentFnSym << "\n";
132 /// EmitFunctionBodyEnd - Targets can override this to emit stuff after
133 /// the last basic block in the function.
134 void AlphaAsmPrinter::EmitFunctionBodyEnd() {
135 O << "\t.end " << *CurrentFnSym << "\n";
138 void AlphaAsmPrinter::EmitStartOfAsmFile(Module &M) {
139 if (TM.getSubtarget<AlphaSubtarget>().hasCT())
140 O << "\t.arch ev6\n"; //This might need to be ev67, so leave this test here
142 O << "\t.arch ev6\n";
143 O << "\t.set noat\n";
146 /// PrintAsmOperand - Print out an operand for an inline asm expression.
148 bool AlphaAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
150 const char *ExtraCode) {
151 printOperand(MI, OpNo);
155 bool AlphaAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
158 const char *ExtraCode) {
159 if (ExtraCode && ExtraCode[0])
160 return true; // Unknown modifier.
162 printOperand(MI, OpNo);
167 // Force static initialization.
168 extern "C" void LLVMInitializeAlphaAsmPrinter() {
169 RegisterAsmPrinter<AlphaAsmPrinter> X(TheAlphaTarget);