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/Compiler.h"
31 #include "llvm/Support/ErrorHandling.h"
32 #include "llvm/Support/Mangler.h"
33 #include "llvm/Support/FormattedStream.h"
34 #include "llvm/ADT/Statistic.h"
37 STATISTIC(EmittedInsts, "Number of machine instrs printed");
40 struct VISIBILITY_HIDDEN AlphaAsmPrinter : public AsmPrinter {
41 /// Unique incrementer for label values for referencing Global values.
44 explicit AlphaAsmPrinter(formatted_raw_ostream &o, TargetMachine &tm,
45 const MCAsmInfo *T, bool V)
46 : AsmPrinter(o, tm, T, V) {}
48 virtual const char *getPassName() const {
49 return "Alpha Assembly Printer";
51 void printInstruction(const MachineInstr *MI);
52 void printOp(const MachineOperand &MO, bool IsCallOp = false);
53 void printOperand(const MachineInstr *MI, int opNum);
54 void printBaseOffsetPair(const MachineInstr *MI, int i, bool brackets=true);
55 void PrintGlobalVariable(const GlobalVariable *GVar);
56 bool runOnMachineFunction(MachineFunction &F);
57 bool doInitialization(Module &M);
59 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
60 unsigned AsmVariant, const char *ExtraCode);
61 bool PrintAsmMemoryOperand(const MachineInstr *MI,
64 const char *ExtraCode);
66 } // end of anonymous namespace
68 #include "AlphaGenAsmWriter.inc"
70 void AlphaAsmPrinter::printOperand(const MachineInstr *MI, int opNum)
72 const MachineOperand &MO = MI->getOperand(opNum);
73 if (MO.getType() == MachineOperand::MO_Register) {
74 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
76 O << TM.getRegisterInfo()->get(MO.getReg()).AsmName;
77 } else if (MO.isImm()) {
79 assert(MO.getImm() < (1 << 30));
86 void AlphaAsmPrinter::printOp(const MachineOperand &MO, bool IsCallOp) {
87 const TargetRegisterInfo &RI = *TM.getRegisterInfo();
89 switch (MO.getType()) {
90 case MachineOperand::MO_Register:
91 O << RI.get(MO.getReg()).AsmName;
94 case MachineOperand::MO_Immediate:
95 llvm_unreachable("printOp() does not handle immediate values");
98 case MachineOperand::MO_MachineBasicBlock:
99 GetMBBSymbol(MO.getMBB()->getNumber())->print(O, MAI);
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 << Mang->getMangledName(MO.getGlobal());
115 case MachineOperand::MO_JumpTableIndex:
116 O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
117 << '_' << MO.getIndex();
121 O << "<unknown operand type: " << MO.getType() << ">";
126 /// runOnMachineFunction - This uses the printMachineInstruction()
127 /// method to print assembly for each instruction.
129 bool AlphaAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
132 SetupMachineFunction(MF);
135 // Print out constants referenced by the function
136 EmitConstantPool(MF.getConstantPool());
138 // Print out jump tables referenced by the function
139 EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
141 // Print out labels for the function.
142 const Function *F = MF.getFunction();
143 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
145 EmitAlignment(MF.getAlignment(), F);
146 switch (F->getLinkage()) {
147 default: llvm_unreachable("Unknown linkage type!");
148 case Function::InternalLinkage: // Symbols default to internal.
149 case Function::PrivateLinkage:
150 case Function::LinkerPrivateLinkage:
152 case Function::ExternalLinkage:
153 O << "\t.globl " << CurrentFnName << "\n";
155 case Function::WeakAnyLinkage:
156 case Function::WeakODRLinkage:
157 case Function::LinkOnceAnyLinkage:
158 case Function::LinkOnceODRLinkage:
159 O << MAI->getWeakRefDirective() << CurrentFnName << "\n";
163 printVisibility(CurrentFnName, F->getVisibility());
165 O << "\t.ent " << CurrentFnName << "\n";
167 O << CurrentFnName << ":\n";
169 // Print out code for the function.
170 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
172 if (I != MF.begin()) {
173 printBasicBlockLabel(I, true, true);
176 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
178 // Print the assembly for the instruction.
180 processDebugLoc(II->getDebugLoc());
182 printInstruction(II);
184 if (VerboseAsm && !II->getDebugLoc().isUnknown())
190 O << "\t.end " << CurrentFnName << "\n";
192 // We didn't modify anything.
196 bool AlphaAsmPrinter::doInitialization(Module &M)
198 if(TM.getSubtarget<AlphaSubtarget>().hasCT())
199 O << "\t.arch ev6\n"; //This might need to be ev67, so leave this test here
201 O << "\t.arch ev6\n";
202 O << "\t.set noat\n";
203 return AsmPrinter::doInitialization(M);
206 void AlphaAsmPrinter::PrintGlobalVariable(const GlobalVariable *GVar) {
207 const TargetData *TD = TM.getTargetData();
209 if (!GVar->hasInitializer()) return; // External global require no code
211 // Check to see if this is a special global used by LLVM, if so, emit it.
212 if (EmitSpecialLLVMGlobal(GVar))
215 std::string name = Mang->getMangledName(GVar);
216 Constant *C = GVar->getInitializer();
217 unsigned Size = TD->getTypeAllocSize(C->getType());
218 unsigned Align = TD->getPreferredAlignmentLog(GVar);
220 // 0: Switch to section
221 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(GVar, Mang,
224 // 1: Check visibility
225 printVisibility(name, GVar->getVisibility());
228 switch (GVar->getLinkage()) {
229 case GlobalValue::LinkOnceAnyLinkage:
230 case GlobalValue::LinkOnceODRLinkage:
231 case GlobalValue::WeakAnyLinkage:
232 case GlobalValue::WeakODRLinkage:
233 case GlobalValue::CommonLinkage:
234 O << MAI->getWeakRefDirective() << name << '\n';
236 case GlobalValue::AppendingLinkage:
237 case GlobalValue::ExternalLinkage:
238 O << MAI->getGlobalDirective() << name << "\n";
240 case GlobalValue::InternalLinkage:
241 case GlobalValue::PrivateLinkage:
242 case GlobalValue::LinkerPrivateLinkage:
245 llvm_unreachable("Unknown linkage type!");
248 // 3: Type, Size, Align
249 if (MAI->hasDotTypeDotSizeDirective()) {
250 O << "\t.type\t" << name << ", @object\n";
251 O << "\t.size\t" << name << ", " << Size << "\n";
254 EmitAlignment(Align, GVar);
258 EmitGlobalConstant(C);
262 /// PrintAsmOperand - Print out an operand for an inline asm expression.
264 bool AlphaAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
266 const char *ExtraCode) {
267 printOperand(MI, OpNo);
271 bool AlphaAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
274 const char *ExtraCode) {
275 if (ExtraCode && ExtraCode[0])
276 return true; // Unknown modifier.
278 printOperand(MI, OpNo);
283 // Force static initialization.
284 extern "C" void LLVMInitializeAlphaAsmPrinter() {
285 RegisterAsmPrinter<AlphaAsmPrinter> X(TheAlphaTarget);