1 //===-- SparcAsmPrinter.cpp - Sparc LLVM assembly writer ------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source 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 //===----------------------------------------------------------------------===//
16 #include "SparcInstrInfo.h"
17 #include "llvm/Constants.h"
18 #include "llvm/DerivedTypes.h"
19 #include "llvm/Module.h"
20 #include "llvm/Assembly/Writer.h"
21 #include "llvm/CodeGen/AsmPrinter.h"
22 #include "llvm/CodeGen/MachineFunctionPass.h"
23 #include "llvm/CodeGen/MachineConstantPool.h"
24 #include "llvm/CodeGen/MachineInstr.h"
25 #include "llvm/Target/TargetMachine.h"
26 #include "llvm/Support/Mangler.h"
27 #include "llvm/ADT/Statistic.h"
28 #include "llvm/ADT/StringExtras.h"
29 #include "llvm/Support/CommandLine.h"
30 #include "llvm/Support/MathExtras.h"
36 Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
38 struct SparcAsmPrinter : public AsmPrinter {
39 SparcAsmPrinter(std::ostream &O, TargetMachine &TM) : AsmPrinter(O, TM) {
40 Data16bitsDirective = "\t.half\t";
41 Data32bitsDirective = "\t.word\t";
42 Data64bitsDirective = 0; // .xword is only supported by V9.
43 ZeroDirective = "\t.skip\t";
45 ConstantPoolSection = "\t.section \".rodata\",#alloc\n";
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;
55 virtual const char *getPassName() const {
56 return "Sparc Assembly Printer";
59 void printOperand(const MachineInstr *MI, int opNum);
60 void printMemOperand(const MachineInstr *MI, int opNum,
61 const char *Modifier = 0);
62 void printCCOperand(const MachineInstr *MI, int opNum);
64 bool printInstruction(const MachineInstr *MI); // autogenerated.
65 bool runOnMachineFunction(MachineFunction &F);
66 bool doInitialization(Module &M);
67 bool doFinalization(Module &M);
69 } // end of anonymous namespace
71 #include "SparcGenAsmWriter.inc"
73 /// createSparcCodePrinterPass - Returns a pass that prints the SPARC
74 /// assembly code for a MachineFunction to the given output stream,
75 /// using the given target machine description. This should work
76 /// regardless of whether the function is in SSA form.
78 FunctionPass *llvm::createSparcCodePrinterPass(std::ostream &o,
80 return new SparcAsmPrinter(o, tm);
83 /// runOnMachineFunction - This uses the printMachineInstruction()
84 /// method to print assembly for each instruction.
86 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!)
94 static unsigned BBNumber = 0;
97 // What's my mangled name?
98 CurrentFnName = Mang->getValueName(MF.getFunction());
100 // Print out labels for the function.
101 SwitchToTextSection(".text", MF.getFunction());
102 EmitAlignment(4, MF.getFunction());
103 O << "\t.globl\t" << CurrentFnName << "\n";
104 O << "\t.type\t" << CurrentFnName << ", #function\n";
105 O << CurrentFnName << ":\n";
107 // Number each basic block so that we can consistently refer to them
108 // in PC-relative references.
110 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
112 NumberForBB[I->getBasicBlock()] = BBNumber++;
115 // Print out code for the function.
116 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
118 // Print a label for the basic block.
119 if (I != MF.begin()) {
120 printBasicBlockLabel(I, true);
123 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
125 // Print the assembly for the instruction.
127 printInstruction(II);
132 // We didn't modify anything.
136 void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
137 const MachineOperand &MO = MI->getOperand (opNum);
138 const MRegisterInfo &RI = *TM.getRegisterInfo();
139 bool CloseParen = false;
140 if (MI->getOpcode() == SP::SETHIi && !MO.isRegister() && !MO.isImmediate()) {
143 } else if ((MI->getOpcode() == SP::ORri || MI->getOpcode() == SP::ADDri)
144 && !MO.isRegister() && !MO.isImmediate()) {
148 switch (MO.getType()) {
149 case MachineOperand::MO_Register:
150 if (MRegisterInfo::isPhysicalRegister(MO.getReg()))
151 O << "%" << LowercaseString (RI.get(MO.getReg()).Name);
153 O << "%reg" << MO.getReg();
156 case MachineOperand::MO_Immediate:
157 O << (int)MO.getImmedValue();
159 case MachineOperand::MO_MachineBasicBlock:
160 printBasicBlockLabel(MO.getMachineBasicBlock());
162 case MachineOperand::MO_GlobalAddress:
163 O << Mang->getValueName(MO.getGlobal());
165 case MachineOperand::MO_ExternalSymbol:
166 O << MO.getSymbolName();
168 case MachineOperand::MO_ConstantPoolIndex:
169 O << PrivateGlobalPrefix << "CPI" << getFunctionNumber() << "_"
170 << MO.getConstantPoolIndex();
173 O << "<unknown operand type>"; abort (); break;
175 if (CloseParen) O << ")";
178 void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum,
179 const char *Modifier) {
180 printOperand(MI, opNum);
182 // If this is an ADD operand, emit it like normal operands.
183 if (Modifier && !strcmp(Modifier, "arith")) {
185 printOperand(MI, opNum+1);
189 MachineOperand::MachineOperandType OpTy = MI->getOperand(opNum+1).getType();
191 if (MI->getOperand(opNum+1).isRegister() &&
192 MI->getOperand(opNum+1).getReg() == SP::G0)
193 return; // don't print "+%g0"
194 if (MI->getOperand(opNum+1).isImmediate() &&
195 MI->getOperand(opNum+1).getImmedValue() == 0)
196 return; // don't print "+0"
199 if (MI->getOperand(opNum+1).isGlobalAddress() ||
200 MI->getOperand(opNum+1).isConstantPoolIndex()) {
202 printOperand(MI, opNum+1);
205 printOperand(MI, opNum+1);
209 void SparcAsmPrinter::printCCOperand(const MachineInstr *MI, int opNum) {
210 int CC = (int)MI->getOperand(opNum).getImmedValue();
211 O << SPARCCondCodeToString((SPCC::CondCodes)CC);
216 bool SparcAsmPrinter::doInitialization(Module &M) {
217 Mang = new Mangler(M);
218 return false; // success
221 bool SparcAsmPrinter::doFinalization(Module &M) {
222 const TargetData *TD = TM.getTargetData();
224 // Print out module-level global variables here.
225 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
227 if (I->hasInitializer()) { // External global require no code
228 // Check to see if this is a special global used by LLVM, if so, emit it.
229 if (EmitSpecialLLVMGlobal(I))
233 std::string name = Mang->getValueName(I);
234 Constant *C = I->getInitializer();
235 unsigned Size = TD->getTypeSize(C->getType());
236 unsigned Align = TD->getTypeAlignment(C->getType());
238 if (C->isNullValue() &&
239 (I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
240 I->hasWeakLinkage() /* FIXME: Verify correct */)) {
241 SwitchToDataSection(".data", I);
242 if (I->hasInternalLinkage())
243 O << "\t.local " << name << "\n";
245 O << "\t.comm " << name << "," << TD->getTypeSize(C->getType())
246 << "," << (unsigned)TD->getTypeAlignment(C->getType());
248 WriteAsOperand(O, I, true, true, &M);
251 switch (I->getLinkage()) {
252 case GlobalValue::LinkOnceLinkage:
253 case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
254 // Nonnull linkonce -> weak
255 O << "\t.weak " << name << "\n";
256 SwitchToDataSection("", I);
257 O << "\t.section\t\".llvm.linkonce.d." << name
258 << "\",\"aw\",@progbits\n";
261 case GlobalValue::AppendingLinkage:
262 // FIXME: appending linkage variables should go into a section of
263 // their name or something. For now, just emit them as external.
264 case GlobalValue::ExternalLinkage:
265 // If external or appending, declare as a global symbol
266 O << "\t.globl " << name << "\n";
268 case GlobalValue::InternalLinkage:
269 if (C->isNullValue())
270 SwitchToDataSection(".bss", I);
272 SwitchToDataSection(".data", I);
274 case GlobalValue::GhostLinkage:
275 std::cerr << "Should not have any unmaterialized functions!\n";
279 O << "\t.align " << Align << "\n";
280 O << "\t.type " << name << ",#object\n";
281 O << "\t.size " << name << "," << Size << "\n";
282 O << name << ":\t\t\t\t! ";
283 WriteAsOperand(O, I, true, true, &M);
285 EmitGlobalConstant(C);
289 AsmPrinter::doFinalization(M);
290 return false; // success