1 //===-- SparcAsmPrinter.cpp - Sparc 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 SPARC assembly language.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "asm-printer"
17 #include "SparcInstrInfo.h"
18 #include "SparcTargetMachine.h"
19 #include "llvm/Constants.h"
20 #include "llvm/DerivedTypes.h"
21 #include "llvm/Module.h"
22 #include "llvm/CodeGen/AsmPrinter.h"
23 #include "llvm/CodeGen/DwarfWriter.h"
24 #include "llvm/CodeGen/MachineFunctionPass.h"
25 #include "llvm/CodeGen/MachineConstantPool.h"
26 #include "llvm/CodeGen/MachineInstr.h"
27 #include "llvm/MC/MCStreamer.h"
28 #include "llvm/MC/MCAsmInfo.h"
29 #include "llvm/Target/TargetLoweringObjectFile.h"
30 #include "llvm/Target/TargetRegistry.h"
31 #include "llvm/ADT/Statistic.h"
32 #include "llvm/ADT/StringExtras.h"
33 #include "llvm/Support/CommandLine.h"
34 #include "llvm/Support/ErrorHandling.h"
35 #include "llvm/Support/FormattedStream.h"
36 #include "llvm/Support/Mangler.h"
37 #include "llvm/Support/MathExtras.h"
43 STATISTIC(EmittedInsts, "Number of machine instrs printed");
46 class VISIBILITY_HIDDEN SparcAsmPrinter : public AsmPrinter {
47 /// We name each basic block in a Function with a unique number, so
48 /// that we can consistently refer to them later. This is cleared
49 /// at the beginning of each call to runOnMachineFunction().
51 typedef std::map<const Value *, unsigned> ValueMapTy;
52 ValueMapTy NumberForBB;
55 explicit SparcAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
56 const MCAsmInfo *T, bool V)
57 : AsmPrinter(O, TM, T, V), BBNumber(0) {}
59 virtual const char *getPassName() const {
60 return "Sparc Assembly Printer";
63 void PrintGlobalVariable(const GlobalVariable *GVar);
64 void printOperand(const MachineInstr *MI, int opNum);
65 void printMemOperand(const MachineInstr *MI, int opNum,
66 const char *Modifier = 0);
67 void printCCOperand(const MachineInstr *MI, int opNum);
69 void printInstruction(const MachineInstr *MI); // autogenerated.
70 bool runOnMachineFunction(MachineFunction &F);
71 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
72 unsigned AsmVariant, const char *ExtraCode);
73 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
74 unsigned AsmVariant, const char *ExtraCode);
76 } // end of anonymous namespace
78 #include "SparcGenAsmWriter.inc"
81 /// runOnMachineFunction - This uses the printInstruction()
82 /// method to print assembly for each instruction.
84 bool SparcAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
87 SetupMachineFunction(MF);
89 // Print out constants referenced by the function
90 EmitConstantPool(MF.getConstantPool());
92 // BBNumber is used here so that a given Printer will never give two
93 // BBs the same name. (If you have a better way, please let me know!)
97 // Print out the label for the function.
98 const Function *F = MF.getFunction();
99 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
100 EmitAlignment(MF.getAlignment(), F);
101 O << "\t.globl\t" << CurrentFnName << '\n';
103 printVisibility(CurrentFnName, F->getVisibility());
105 O << "\t.type\t" << CurrentFnName << ", #function\n";
106 O << CurrentFnName << ":\n";
108 // Number each basic block so that we can consistently refer to them
109 // in PC-relative references.
110 // FIXME: Why not use the MBB numbers?
112 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
114 NumberForBB[I->getBasicBlock()] = BBNumber++;
117 // Print out code for the function.
118 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
120 // Print a label for the basic block.
121 if (I != MF.begin()) {
122 printBasicBlockLabel(I, true, true);
125 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
127 // Print the assembly for the instruction.
128 printInstruction(II);
133 // We didn't modify anything.
137 void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
138 const MachineOperand &MO = MI->getOperand (opNum);
139 const TargetRegisterInfo &RI = *TM.getRegisterInfo();
140 bool CloseParen = false;
141 if (MI->getOpcode() == SP::SETHIi && !MO.isReg() && !MO.isImm()) {
144 } else if ((MI->getOpcode() == SP::ORri || MI->getOpcode() == SP::ADDri) &&
145 !MO.isReg() && !MO.isImm()) {
149 switch (MO.getType()) {
150 case MachineOperand::MO_Register:
151 if (TargetRegisterInfo::isPhysicalRegister(MO.getReg()))
152 O << "%" << LowercaseString (RI.get(MO.getReg()).AsmName);
154 O << "%reg" << MO.getReg();
157 case MachineOperand::MO_Immediate:
158 O << (int)MO.getImm();
160 case MachineOperand::MO_MachineBasicBlock:
161 printBasicBlockLabel(MO.getMBB());
163 case MachineOperand::MO_GlobalAddress:
164 O << Mang->getMangledName(MO.getGlobal());
166 case MachineOperand::MO_ExternalSymbol:
167 O << MO.getSymbolName();
169 case MachineOperand::MO_ConstantPoolIndex:
170 O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
174 llvm_unreachable("<unknown operand type>");
176 if (CloseParen) O << ")";
179 void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum,
180 const char *Modifier) {
181 printOperand(MI, opNum);
183 // If this is an ADD operand, emit it like normal operands.
184 if (Modifier && !strcmp(Modifier, "arith")) {
186 printOperand(MI, opNum+1);
190 if (MI->getOperand(opNum+1).isReg() &&
191 MI->getOperand(opNum+1).getReg() == SP::G0)
192 return; // don't print "+%g0"
193 if (MI->getOperand(opNum+1).isImm() &&
194 MI->getOperand(opNum+1).getImm() == 0)
195 return; // don't print "+0"
198 if (MI->getOperand(opNum+1).isGlobal() ||
199 MI->getOperand(opNum+1).isCPI()) {
201 printOperand(MI, opNum+1);
204 printOperand(MI, opNum+1);
208 void SparcAsmPrinter::printCCOperand(const MachineInstr *MI, int opNum) {
209 int CC = (int)MI->getOperand(opNum).getImm();
210 O << SPARCCondCodeToString((SPCC::CondCodes)CC);
213 void SparcAsmPrinter::PrintGlobalVariable(const GlobalVariable* GVar) {
214 const TargetData *TD = TM.getTargetData();
216 if (!GVar->hasInitializer())
217 return; // External global require no code
219 // Check to see if this is a special global used by LLVM, if so, emit it.
220 if (EmitSpecialLLVMGlobal(GVar))
224 std::string name = Mang->getMangledName(GVar);
225 Constant *C = GVar->getInitializer();
226 unsigned Size = TD->getTypeAllocSize(C->getType());
227 unsigned Align = TD->getPreferredAlignment(GVar);
229 printVisibility(name, GVar->getVisibility());
231 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(GVar, Mang,
234 if (C->isNullValue() && !GVar->hasSection()) {
235 if (!GVar->isThreadLocal() &&
236 (GVar->hasLocalLinkage() || GVar->isWeakForLinker())) {
237 if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
239 if (GVar->hasLocalLinkage())
240 O << "\t.local " << name << '\n';
242 O << MAI->getCOMMDirective() << name << ',' << Size;
243 if (MAI->getCOMMDirectiveTakesAlignment())
244 O << ',' << (1 << Align);
251 switch (GVar->getLinkage()) {
252 case GlobalValue::CommonLinkage:
253 case GlobalValue::LinkOnceAnyLinkage:
254 case GlobalValue::LinkOnceODRLinkage:
255 case GlobalValue::WeakAnyLinkage: // FIXME: Verify correct for weak.
256 case GlobalValue::WeakODRLinkage: // FIXME: Verify correct for weak.
257 // Nonnull linkonce -> weak
258 O << "\t.weak " << name << '\n';
260 case GlobalValue::AppendingLinkage:
261 // FIXME: appending linkage variables should go into a section of
262 // their name or something. For now, just emit them as external.
263 case GlobalValue::ExternalLinkage:
264 // If external or appending, declare as a global symbol
265 O << MAI->getGlobalDirective() << name << '\n';
267 case GlobalValue::PrivateLinkage:
268 case GlobalValue::LinkerPrivateLinkage:
269 case GlobalValue::InternalLinkage:
271 case GlobalValue::GhostLinkage:
272 llvm_unreachable("Should not have any unmaterialized functions!");
273 case GlobalValue::DLLImportLinkage:
274 llvm_unreachable("DLLImport linkage is not supported by this target!");
275 case GlobalValue::DLLExportLinkage:
276 llvm_unreachable("DLLExport linkage is not supported by this target!");
278 llvm_unreachable("Unknown linkage type!");
281 EmitAlignment(Align, GVar);
283 if (MAI->hasDotTypeDotSizeDirective()) {
284 O << "\t.type " << name << ",#object\n";
285 O << "\t.size " << name << ',' << Size << '\n';
289 EmitGlobalConstant(C);
292 /// PrintAsmOperand - Print out an operand for an inline asm expression.
294 bool SparcAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
296 const char *ExtraCode) {
297 if (ExtraCode && ExtraCode[0]) {
298 if (ExtraCode[1] != 0) return true; // Unknown modifier.
300 switch (ExtraCode[0]) {
301 default: return true; // Unknown modifier.
307 printOperand(MI, OpNo);
312 bool SparcAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
315 const char *ExtraCode) {
316 if (ExtraCode && ExtraCode[0])
317 return true; // Unknown modifier
320 printMemOperand(MI, OpNo);
326 // Force static initialization.
327 extern "C" void LLVMInitializeSparcAsmPrinter() {
328 RegisterAsmPrinter<SparcAsmPrinter> X(TheSparcTarget);