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 "llvm/Constants.h"
19 #include "llvm/DerivedTypes.h"
20 #include "llvm/Module.h"
21 #include "llvm/CodeGen/AsmPrinter.h"
22 #include "llvm/CodeGen/DwarfWriter.h"
23 #include "llvm/CodeGen/MachineFunctionPass.h"
24 #include "llvm/CodeGen/MachineConstantPool.h"
25 #include "llvm/CodeGen/MachineInstr.h"
26 #include "llvm/Target/TargetAsmInfo.h"
27 #include "llvm/Target/TargetData.h"
28 #include "llvm/Target/TargetMachine.h"
29 #include "llvm/Support/Mangler.h"
30 #include "llvm/Support/raw_ostream.h"
31 #include "llvm/ADT/Statistic.h"
32 #include "llvm/ADT/StringExtras.h"
33 #include "llvm/Support/CommandLine.h"
34 #include "llvm/Support/MathExtras.h"
40 STATISTIC(EmittedInsts, "Number of machine instrs printed");
43 class VISIBILITY_HIDDEN SparcAsmPrinter : public AsmPrinter {
44 /// We name each basic block in a Function with a unique number, so
45 /// that we can consistently refer to them later. This is cleared
46 /// at the beginning of each call to runOnMachineFunction().
48 typedef std::map<const Value *, unsigned> ValueMapTy;
49 ValueMapTy NumberForBB;
51 explicit SparcAsmPrinter(raw_ostream &O, TargetMachine &TM,
52 const TargetAsmInfo *T, CodeGenOpt::Level OL,
54 : AsmPrinter(O, TM, T, OL, V) {}
56 virtual const char *getPassName() const {
57 return "Sparc Assembly Printer";
60 void printModuleLevelGV(const GlobalVariable* GVar);
61 void printOperand(const MachineInstr *MI, int opNum);
62 void printMemOperand(const MachineInstr *MI, int opNum,
63 const char *Modifier = 0);
64 void printCCOperand(const MachineInstr *MI, int opNum);
66 bool printInstruction(const MachineInstr *MI); // autogenerated.
67 bool runOnMachineFunction(MachineFunction &F);
68 bool doInitialization(Module &M);
69 bool doFinalization(Module &M);
70 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
71 unsigned AsmVariant, const char *ExtraCode);
72 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
73 unsigned AsmVariant, const char *ExtraCode);
75 } // end of anonymous namespace
77 #include "SparcGenAsmWriter.inc"
79 /// createSparcCodePrinterPass - Returns a pass that prints the SPARC
80 /// assembly code for a MachineFunction to the given output stream,
81 /// using the given target machine description. This should work
82 /// regardless of whether the function is in SSA form.
84 FunctionPass *llvm::createSparcCodePrinterPass(raw_ostream &o,
86 CodeGenOpt::Level OptLevel,
88 return new SparcAsmPrinter(o, tm, tm.getTargetAsmInfo(), OptLevel, verbose);
91 /// runOnMachineFunction - This uses the printInstruction()
92 /// method to print assembly for each instruction.
94 bool SparcAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
97 SetupMachineFunction(MF);
99 // Print out constants referenced by the function
100 EmitConstantPool(MF.getConstantPool());
102 // BBNumber is used here so that a given Printer will never give two
103 // BBs the same name. (If you have a better way, please let me know!)
104 static unsigned BBNumber = 0;
108 // Print out the label for the function.
109 const Function *F = MF.getFunction();
110 SwitchToSection(TAI->SectionForGlobal(F));
112 O << "\t.globl\t" << CurrentFnName << '\n';
114 printVisibility(CurrentFnName, F->getVisibility());
116 O << "\t.type\t" << CurrentFnName << ", #function\n";
117 O << CurrentFnName << ":\n";
119 // Number each basic block so that we can consistently refer to them
120 // in PC-relative references.
121 // FIXME: Why not use the MBB numbers?
123 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
125 NumberForBB[I->getBasicBlock()] = BBNumber++;
128 // Print out code for the function.
129 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
131 // Print a label for the basic block.
132 if (I != MF.begin()) {
133 printBasicBlockLabel(I, true, true);
136 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
138 // Print the assembly for the instruction.
139 printInstruction(II);
144 // We didn't modify anything.
148 void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
149 const MachineOperand &MO = MI->getOperand (opNum);
150 const TargetRegisterInfo &RI = *TM.getRegisterInfo();
151 bool CloseParen = false;
152 if (MI->getOpcode() == SP::SETHIi && !MO.isReg() && !MO.isImm()) {
155 } else if ((MI->getOpcode() == SP::ORri || MI->getOpcode() == SP::ADDri) &&
156 !MO.isReg() && !MO.isImm()) {
160 switch (MO.getType()) {
161 case MachineOperand::MO_Register:
162 if (TargetRegisterInfo::isPhysicalRegister(MO.getReg()))
163 O << "%" << LowercaseString (RI.get(MO.getReg()).AsmName);
165 O << "%reg" << MO.getReg();
168 case MachineOperand::MO_Immediate:
169 O << (int)MO.getImm();
171 case MachineOperand::MO_MachineBasicBlock:
172 printBasicBlockLabel(MO.getMBB());
174 case MachineOperand::MO_GlobalAddress:
176 const GlobalValue *GV = MO.getGlobal();
177 O << Mang->getValueName(GV);
180 case MachineOperand::MO_ExternalSymbol:
181 O << MO.getSymbolName();
183 case MachineOperand::MO_ConstantPoolIndex:
184 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
188 O << "<unknown operand type>"; abort (); break;
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 bool SparcAsmPrinter::doInitialization(Module &M) {
228 Mang = new Mangler(M, "", TAI->getPrivateGlobalPrefix());
229 return false; // success
232 bool SparcAsmPrinter::doFinalization(Module &M) {
233 // Print out module-level global variables here.
234 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
236 printModuleLevelGV(I);
240 return AsmPrinter::doFinalization(M);
243 void SparcAsmPrinter::printModuleLevelGV(const GlobalVariable* GVar) {
244 const TargetData *TD = TM.getTargetData();
246 if (!GVar->hasInitializer())
247 return; // External global require no code
249 // Check to see if this is a special global used by LLVM, if so, emit it.
250 if (EmitSpecialLLVMGlobal(GVar))
254 std::string name = Mang->getValueName(GVar);
255 Constant *C = GVar->getInitializer();
256 unsigned Size = TD->getTypeAllocSize(C->getType());
257 unsigned Align = TD->getPreferredAlignment(GVar);
259 printVisibility(name, GVar->getVisibility());
261 SwitchToSection(TAI->SectionForGlobal(GVar));
263 if (C->isNullValue() && !GVar->hasSection()) {
264 if (!GVar->isThreadLocal() &&
265 (GVar->hasLocalLinkage() || GVar->isWeakForLinker())) {
266 if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
268 if (GVar->hasLocalLinkage())
269 O << "\t.local " << name << '\n';
271 O << TAI->getCOMMDirective() << name << ',' << Size;
272 if (TAI->getCOMMDirectiveTakesAlignment())
273 O << ',' << (1 << Align);
280 switch (GVar->getLinkage()) {
281 case GlobalValue::CommonLinkage:
282 case GlobalValue::LinkOnceAnyLinkage:
283 case GlobalValue::LinkOnceODRLinkage:
284 case GlobalValue::WeakAnyLinkage: // FIXME: Verify correct for weak.
285 case GlobalValue::WeakODRLinkage: // FIXME: Verify correct for weak.
286 // Nonnull linkonce -> weak
287 O << "\t.weak " << name << '\n';
289 case GlobalValue::AppendingLinkage:
290 // FIXME: appending linkage variables should go into a section of
291 // their name or something. For now, just emit them as external.
292 case GlobalValue::ExternalLinkage:
293 // If external or appending, declare as a global symbol
294 O << TAI->getGlobalDirective() << name << '\n';
296 case GlobalValue::PrivateLinkage:
297 case GlobalValue::InternalLinkage:
299 case GlobalValue::GhostLinkage:
300 cerr << "Should not have any unmaterialized functions!\n";
302 case GlobalValue::DLLImportLinkage:
303 cerr << "DLLImport linkage is not supported by this target!\n";
305 case GlobalValue::DLLExportLinkage:
306 cerr << "DLLExport linkage is not supported by this target!\n";
309 assert(0 && "Unknown linkage type!");
312 EmitAlignment(Align, GVar);
314 if (TAI->hasDotTypeDotSizeDirective()) {
315 O << "\t.type " << name << ",#object\n";
316 O << "\t.size " << name << ',' << Size << '\n';
320 EmitGlobalConstant(C);
323 /// PrintAsmOperand - Print out an operand for an inline asm expression.
325 bool SparcAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
327 const char *ExtraCode) {
328 if (ExtraCode && ExtraCode[0]) {
329 if (ExtraCode[1] != 0) return true; // Unknown modifier.
331 switch (ExtraCode[0]) {
332 default: return true; // Unknown modifier.
338 printOperand(MI, OpNo);
343 bool SparcAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
346 const char *ExtraCode) {
347 if (ExtraCode && ExtraCode[0])
348 return true; // Unknown modifier
351 printMemOperand(MI, OpNo);