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/MCAsmInfo.h"
28 #include "llvm/MC/MCStreamer.h"
29 #include "llvm/MC/MCSymbol.h"
30 #include "llvm/Target/TargetLoweringObjectFile.h"
31 #include "llvm/Target/TargetRegistry.h"
32 #include "llvm/ADT/Statistic.h"
33 #include "llvm/ADT/StringExtras.h"
34 #include "llvm/Support/CommandLine.h"
35 #include "llvm/Support/ErrorHandling.h"
36 #include "llvm/Support/FormattedStream.h"
37 #include "llvm/Support/Mangler.h"
38 #include "llvm/Support/MathExtras.h"
44 STATISTIC(EmittedInsts, "Number of machine instrs printed");
47 class VISIBILITY_HIDDEN SparcAsmPrinter : public AsmPrinter {
48 /// We name each basic block in a Function with a unique number, so
49 /// that we can consistently refer to them later. This is cleared
50 /// at the beginning of each call to runOnMachineFunction().
52 typedef std::map<const Value *, unsigned> ValueMapTy;
53 ValueMapTy NumberForBB;
56 explicit SparcAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
57 const MCAsmInfo *T, bool V)
58 : AsmPrinter(O, TM, T, V), BBNumber(0) {}
60 virtual const char *getPassName() const {
61 return "Sparc Assembly Printer";
64 void PrintGlobalVariable(const GlobalVariable *GVar);
65 void printOperand(const MachineInstr *MI, int opNum);
66 void printMemOperand(const MachineInstr *MI, int opNum,
67 const char *Modifier = 0);
68 void printCCOperand(const MachineInstr *MI, int opNum);
70 void printInstruction(const MachineInstr *MI); // autogenerated.
71 static const char *getRegisterName(unsigned RegNo);
73 bool runOnMachineFunction(MachineFunction &F);
74 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
75 unsigned AsmVariant, const char *ExtraCode);
76 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
77 unsigned AsmVariant, const char *ExtraCode);
79 } // end of anonymous namespace
81 #include "SparcGenAsmWriter.inc"
84 /// runOnMachineFunction - This uses the printInstruction()
85 /// method to print assembly for each instruction.
87 bool SparcAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
90 SetupMachineFunction(MF);
92 // Print out constants referenced by the function
93 EmitConstantPool(MF.getConstantPool());
95 // BBNumber is used here so that a given Printer will never give two
96 // BBs the same name. (If you have a better way, please let me know!)
100 // Print out the label for the function.
101 const Function *F = MF.getFunction();
102 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
103 EmitAlignment(MF.getAlignment(), F);
104 O << "\t.globl\t" << CurrentFnName << '\n';
106 printVisibility(CurrentFnName, F->getVisibility());
108 O << "\t.type\t" << CurrentFnName << ", #function\n";
109 O << CurrentFnName << ":\n";
110 // Emit pre-function debug information.
111 DW->BeginFunction(&MF);
113 // Number each basic block so that we can consistently refer to them
114 // in PC-relative references.
115 // FIXME: Why not use the MBB numbers?
117 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
119 NumberForBB[I->getBasicBlock()] = BBNumber++;
122 // Print out code for the function.
123 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
125 // Print a label for the basic block.
126 if (I != MF.begin()) {
127 EmitBasicBlockStart(I);
130 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
132 // Print the assembly for the instruction.
133 processDebugLoc(II->getDebugLoc());
134 printInstruction(II);
136 if (VerboseAsm && !II->getDebugLoc().isUnknown())
144 // Emit post-function debug information.
145 DW->EndFunction(&MF);
147 // We didn't modify anything.
151 void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
152 const MachineOperand &MO = MI->getOperand (opNum);
153 const TargetRegisterInfo &RI = *TM.getRegisterInfo();
154 bool CloseParen = false;
155 if (MI->getOpcode() == SP::SETHIi && !MO.isReg() && !MO.isImm()) {
158 } else if ((MI->getOpcode() == SP::ORri || MI->getOpcode() == SP::ADDri) &&
159 !MO.isReg() && !MO.isImm()) {
163 switch (MO.getType()) {
164 case MachineOperand::MO_Register:
165 if (TargetRegisterInfo::isPhysicalRegister(MO.getReg()))
166 O << "%" << LowercaseString (RI.get(MO.getReg()).AsmName);
168 O << "%reg" << MO.getReg();
171 case MachineOperand::MO_Immediate:
172 O << (int)MO.getImm();
174 case MachineOperand::MO_MachineBasicBlock:
175 GetMBBSymbol(MO.getMBB()->getNumber())->print(O, MAI);
177 case MachineOperand::MO_GlobalAddress:
178 O << Mang->getMangledName(MO.getGlobal());
180 case MachineOperand::MO_ExternalSymbol:
181 O << MO.getSymbolName();
183 case MachineOperand::MO_ConstantPoolIndex:
184 O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
188 llvm_unreachable("<unknown operand type>");
190 if (CloseParen) O << ")";
193 void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum,
194 const char *Modifier) {
195 printOperand(MI, opNum);
197 // If this is an ADD operand, emit it like normal operands.
198 if (Modifier && !strcmp(Modifier, "arith")) {
200 printOperand(MI, opNum+1);
204 if (MI->getOperand(opNum+1).isReg() &&
205 MI->getOperand(opNum+1).getReg() == SP::G0)
206 return; // don't print "+%g0"
207 if (MI->getOperand(opNum+1).isImm() &&
208 MI->getOperand(opNum+1).getImm() == 0)
209 return; // don't print "+0"
212 if (MI->getOperand(opNum+1).isGlobal() ||
213 MI->getOperand(opNum+1).isCPI()) {
215 printOperand(MI, opNum+1);
218 printOperand(MI, opNum+1);
222 void SparcAsmPrinter::printCCOperand(const MachineInstr *MI, int opNum) {
223 int CC = (int)MI->getOperand(opNum).getImm();
224 O << SPARCCondCodeToString((SPCC::CondCodes)CC);
227 void SparcAsmPrinter::PrintGlobalVariable(const GlobalVariable* GVar) {
228 const TargetData *TD = TM.getTargetData();
230 if (!GVar->hasInitializer())
231 return; // External global require no code
233 // Check to see if this is a special global used by LLVM, if so, emit it.
234 if (EmitSpecialLLVMGlobal(GVar))
238 std::string name = Mang->getMangledName(GVar);
239 Constant *C = GVar->getInitializer();
240 unsigned Size = TD->getTypeAllocSize(C->getType());
241 unsigned Align = TD->getPreferredAlignment(GVar);
243 printVisibility(name, GVar->getVisibility());
245 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(GVar, Mang,
248 if (C->isNullValue() && !GVar->hasSection()) {
249 if (!GVar->isThreadLocal() &&
250 (GVar->hasLocalLinkage() || GVar->isWeakForLinker())) {
251 if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
253 if (GVar->hasLocalLinkage())
254 O << "\t.local " << name << '\n';
256 O << MAI->getCOMMDirective() << name << ',' << Size;
257 if (MAI->getCOMMDirectiveTakesAlignment())
258 O << ',' << (1 << Align);
265 switch (GVar->getLinkage()) {
266 case GlobalValue::CommonLinkage:
267 case GlobalValue::LinkOnceAnyLinkage:
268 case GlobalValue::LinkOnceODRLinkage:
269 case GlobalValue::WeakAnyLinkage: // FIXME: Verify correct for weak.
270 case GlobalValue::WeakODRLinkage: // FIXME: Verify correct for weak.
271 // Nonnull linkonce -> weak
272 O << "\t.weak " << name << '\n';
274 case GlobalValue::AppendingLinkage:
275 // FIXME: appending linkage variables should go into a section of
276 // their name or something. For now, just emit them as external.
277 case GlobalValue::ExternalLinkage:
278 // If external or appending, declare as a global symbol
279 O << MAI->getGlobalDirective() << name << '\n';
281 case GlobalValue::PrivateLinkage:
282 case GlobalValue::LinkerPrivateLinkage:
283 case GlobalValue::InternalLinkage:
285 case GlobalValue::GhostLinkage:
286 llvm_unreachable("Should not have any unmaterialized functions!");
287 case GlobalValue::DLLImportLinkage:
288 llvm_unreachable("DLLImport linkage is not supported by this target!");
289 case GlobalValue::DLLExportLinkage:
290 llvm_unreachable("DLLExport linkage is not supported by this target!");
292 llvm_unreachable("Unknown linkage type!");
295 EmitAlignment(Align, GVar);
297 if (MAI->hasDotTypeDotSizeDirective()) {
298 O << "\t.type " << name << ",#object\n";
299 O << "\t.size " << name << ',' << Size << '\n';
303 EmitGlobalConstant(C);
306 /// PrintAsmOperand - Print out an operand for an inline asm expression.
308 bool SparcAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
310 const char *ExtraCode) {
311 if (ExtraCode && ExtraCode[0]) {
312 if (ExtraCode[1] != 0) return true; // Unknown modifier.
314 switch (ExtraCode[0]) {
315 default: return true; // Unknown modifier.
321 printOperand(MI, OpNo);
326 bool SparcAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
329 const char *ExtraCode) {
330 if (ExtraCode && ExtraCode[0])
331 return true; // Unknown modifier
334 printMemOperand(MI, OpNo);
340 // Force static initialization.
341 extern "C" void LLVMInitializeSparcAsmPrinter() {
342 RegisterAsmPrinter<SparcAsmPrinter> X(TheSparcTarget);