1 //===-- SystemZAsmPrinter.cpp - SystemZ 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 the SystemZ assembly language.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "asm-printer"
17 #include "SystemZInstrInfo.h"
18 #include "SystemZTargetMachine.h"
19 #include "llvm/Constants.h"
20 #include "llvm/DerivedTypes.h"
21 #include "llvm/Module.h"
22 #include "llvm/Assembly/Writer.h"
23 #include "llvm/CodeGen/AsmPrinter.h"
24 #include "llvm/CodeGen/DwarfWriter.h"
25 #include "llvm/CodeGen/MachineModuleInfo.h"
26 #include "llvm/CodeGen/MachineFunctionPass.h"
27 #include "llvm/CodeGen/MachineConstantPool.h"
28 #include "llvm/CodeGen/MachineInstr.h"
29 #include "llvm/MC/MCStreamer.h"
30 #include "llvm/MC/MCAsmInfo.h"
31 #include "llvm/MC/MCSymbol.h"
32 #include "llvm/Target/TargetData.h"
33 #include "llvm/Target/TargetLoweringObjectFile.h"
34 #include "llvm/Target/TargetRegistry.h"
35 #include "llvm/Support/ErrorHandling.h"
36 #include "llvm/Support/FormattedStream.h"
40 class SystemZAsmPrinter : public AsmPrinter {
42 SystemZAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
43 MCContext &Ctx, MCStreamer &Streamer,
45 : AsmPrinter(O, TM, Ctx, Streamer, MAI) {}
47 virtual const char *getPassName() const {
48 return "SystemZ Assembly Printer";
51 void printOperand(const MachineInstr *MI, int OpNum,
52 const char* Modifier = 0);
53 void printPCRelImmOperand(const MachineInstr *MI, int OpNum);
54 void printRIAddrOperand(const MachineInstr *MI, int OpNum,
55 const char* Modifier = 0);
56 void printRRIAddrOperand(const MachineInstr *MI, int OpNum,
57 const char* Modifier = 0);
58 void printS16ImmOperand(const MachineInstr *MI, int OpNum) {
59 O << (int16_t)MI->getOperand(OpNum).getImm();
61 void printS32ImmOperand(const MachineInstr *MI, int OpNum) {
62 O << (int32_t)MI->getOperand(OpNum).getImm();
65 void printInstruction(const MachineInstr *MI); // autogenerated.
66 static const char *getRegisterName(unsigned RegNo);
68 void EmitInstruction(const MachineInstr *MI);
70 void getAnalysisUsage(AnalysisUsage &AU) const {
71 AsmPrinter::getAnalysisUsage(AU);
75 } // end of anonymous namespace
77 #include "SystemZGenAsmWriter.inc"
79 void SystemZAsmPrinter::EmitInstruction(const MachineInstr *MI) {
80 // Call the autogenerated instruction printer routines.
82 OutStreamer.AddBlankLine();
85 void SystemZAsmPrinter::printPCRelImmOperand(const MachineInstr *MI, int OpNum){
86 const MachineOperand &MO = MI->getOperand(OpNum);
87 switch (MO.getType()) {
88 case MachineOperand::MO_Immediate:
91 case MachineOperand::MO_MachineBasicBlock:
92 O << *MO.getMBB()->getSymbol(OutContext);
94 case MachineOperand::MO_GlobalAddress: {
95 const GlobalValue *GV = MO.getGlobal();
96 O << *GetGlobalValueSymbol(GV);
98 // Assemble calls via PLT for externally visible symbols if PIC.
99 if (TM.getRelocationModel() == Reloc::PIC_ &&
100 !GV->hasHiddenVisibility() && !GV->hasProtectedVisibility() &&
101 !GV->hasLocalLinkage())
104 printOffset(MO.getOffset());
107 case MachineOperand::MO_ExternalSymbol: {
108 std::string Name(MAI->getGlobalPrefix());
109 Name += MO.getSymbolName();
112 if (TM.getRelocationModel() == Reloc::PIC_)
118 assert(0 && "Not implemented yet!");
123 void SystemZAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
124 const char* Modifier) {
125 const MachineOperand &MO = MI->getOperand(OpNum);
126 switch (MO.getType()) {
127 case MachineOperand::MO_Register: {
128 assert (TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
129 "Virtual registers should be already mapped!");
130 unsigned Reg = MO.getReg();
131 if (Modifier && strncmp(Modifier, "subreg", 6) == 0) {
132 if (strncmp(Modifier + 7, "even", 4) == 0)
133 Reg = TRI->getSubReg(Reg, SystemZ::SUBREG_EVEN);
134 else if (strncmp(Modifier + 7, "odd", 3) == 0)
135 Reg = TRI->getSubReg(Reg, SystemZ::SUBREG_ODD);
137 assert(0 && "Invalid subreg modifier");
140 O << '%' << getRegisterName(Reg);
143 case MachineOperand::MO_Immediate:
146 case MachineOperand::MO_MachineBasicBlock:
147 O << *MO.getMBB()->getSymbol(OutContext);
149 case MachineOperand::MO_JumpTableIndex:
150 O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() << '_'
154 case MachineOperand::MO_ConstantPoolIndex:
155 O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
158 printOffset(MO.getOffset());
160 case MachineOperand::MO_GlobalAddress:
161 O << *GetGlobalValueSymbol(MO.getGlobal());
163 case MachineOperand::MO_ExternalSymbol: {
164 O << *GetExternalSymbolSymbol(MO.getSymbolName());
168 assert(0 && "Not implemented yet!");
171 switch (MO.getTargetFlags()) {
173 llvm_unreachable("Unknown target flag on GV operand");
174 case SystemZII::MO_NO_FLAG:
176 case SystemZII::MO_GOTENT: O << "@GOTENT"; break;
177 case SystemZII::MO_PLT: O << "@PLT"; break;
180 printOffset(MO.getOffset());
183 void SystemZAsmPrinter::printRIAddrOperand(const MachineInstr *MI, int OpNum,
184 const char* Modifier) {
185 const MachineOperand &Base = MI->getOperand(OpNum);
187 // Print displacement operand.
188 printOperand(MI, OpNum+1);
190 // Print base operand (if any)
193 printOperand(MI, OpNum);
198 void SystemZAsmPrinter::printRRIAddrOperand(const MachineInstr *MI, int OpNum,
199 const char* Modifier) {
200 const MachineOperand &Base = MI->getOperand(OpNum);
201 const MachineOperand &Index = MI->getOperand(OpNum+2);
203 // Print displacement operand.
204 printOperand(MI, OpNum+1);
206 // Print base operand (if any)
209 printOperand(MI, OpNum);
210 if (Index.getReg()) {
212 printOperand(MI, OpNum+2);
216 assert(!Index.getReg() && "Should allocate base register first!");
219 // Force static initialization.
220 extern "C" void LLVMInitializeSystemZAsmPrinter() {
221 RegisterAsmPrinter<SystemZAsmPrinter> X(TheSystemZTarget);