1 //===-- MSP430AsmPrinter.cpp - MSP430 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 the MSP430 assembly language.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "asm-printer"
17 #include "MSP430InstrInfo.h"
18 #include "MSP430InstPrinter.h"
19 #include "MSP430MCAsmInfo.h"
20 #include "MSP430TargetMachine.h"
21 #include "llvm/Constants.h"
22 #include "llvm/DerivedTypes.h"
23 #include "llvm/Module.h"
24 #include "llvm/CodeGen/AsmPrinter.h"
25 #include "llvm/CodeGen/DwarfWriter.h"
26 #include "llvm/CodeGen/MachineModuleInfo.h"
27 #include "llvm/CodeGen/MachineFunctionPass.h"
28 #include "llvm/CodeGen/MachineConstantPool.h"
29 #include "llvm/CodeGen/MachineInstr.h"
30 #include "llvm/MC/MCStreamer.h"
31 #include "llvm/MC/MCSymbol.h"
32 #include "llvm/Target/TargetData.h"
33 #include "llvm/Target/TargetLoweringObjectFile.h"
34 #include "llvm/Target/TargetRegistry.h"
35 #include "llvm/ADT/Statistic.h"
36 #include "llvm/Support/Compiler.h"
37 #include "llvm/Support/FormattedStream.h"
38 #include "llvm/Support/Mangler.h"
39 #include "llvm/Support/ErrorHandling.h"
43 STATISTIC(EmittedInsts, "Number of machine instrs printed");
46 class VISIBILITY_HIDDEN MSP430AsmPrinter : public AsmPrinter {
48 MSP430AsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
49 const MCAsmInfo *MAI, bool V)
50 : AsmPrinter(O, TM, MAI, V) {}
52 virtual const char *getPassName() const {
53 return "MSP430 Assembly Printer";
56 void printMCInst(const MCInst *MI) {
57 MSP430InstPrinter(O, *MAI).printInstruction(MI);
59 void printOperand(const MachineInstr *MI, int OpNum,
60 const char* Modifier = 0);
61 void printSrcMemOperand(const MachineInstr *MI, int OpNum,
62 const char* Modifier = 0);
63 void printCCOperand(const MachineInstr *MI, int OpNum);
64 void printInstruction(const MachineInstr *MI); // autogenerated.
65 static const char *getRegisterName(unsigned RegNo);
67 void printMachineInstruction(const MachineInstr * MI);
68 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
70 const char *ExtraCode);
71 bool PrintAsmMemoryOperand(const MachineInstr *MI,
72 unsigned OpNo, unsigned AsmVariant,
73 const char *ExtraCode);
75 void emitFunctionHeader(const MachineFunction &MF);
76 bool runOnMachineFunction(MachineFunction &F);
78 virtual void PrintGlobalVariable(const GlobalVariable *GV) {
79 // FIXME: No support for global variables?
82 void getAnalysisUsage(AnalysisUsage &AU) const {
83 AsmPrinter::getAnalysisUsage(AU);
87 } // end of anonymous namespace
89 #include "MSP430GenAsmWriter.inc"
92 void MSP430AsmPrinter::emitFunctionHeader(const MachineFunction &MF) {
93 const Function *F = MF.getFunction();
95 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
97 unsigned FnAlign = MF.getAlignment();
98 EmitAlignment(FnAlign, F);
100 switch (F->getLinkage()) {
101 default: llvm_unreachable("Unknown linkage type!");
102 case Function::InternalLinkage: // Symbols default to internal.
103 case Function::PrivateLinkage:
104 case Function::LinkerPrivateLinkage:
106 case Function::ExternalLinkage:
107 O << "\t.globl\t" << CurrentFnName << '\n';
109 case Function::LinkOnceAnyLinkage:
110 case Function::LinkOnceODRLinkage:
111 case Function::WeakAnyLinkage:
112 case Function::WeakODRLinkage:
113 O << "\t.weak\t" << CurrentFnName << '\n';
117 printVisibility(CurrentFnName, F->getVisibility());
119 O << "\t.type\t" << CurrentFnName << ",@function\n"
120 << CurrentFnName << ":\n";
123 bool MSP430AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
124 SetupMachineFunction(MF);
127 // Print the 'header' of function
128 emitFunctionHeader(MF);
130 // Print out code for the function.
131 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
133 // Print a label for the basic block.
134 EmitBasicBlockStart(I);
136 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
138 // Print the assembly for the instruction.
139 printMachineInstruction(II);
142 if (MAI->hasDotTypeDotSizeDirective())
143 O << "\t.size\t" << CurrentFnName << ", .-" << CurrentFnName << '\n';
145 // We didn't modify anything
149 void MSP430AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
152 processDebugLoc(MI, true);
154 // Call the autogenerated instruction printer routines.
155 printInstruction(MI);
157 if (VerboseAsm && !MI->getDebugLoc().isUnknown())
161 processDebugLoc(MI, false);
164 void MSP430AsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
165 const char* Modifier) {
166 const MachineOperand &MO = MI->getOperand(OpNum);
167 switch (MO.getType()) {
168 case MachineOperand::MO_Register:
169 O << getRegisterName(MO.getReg());
171 case MachineOperand::MO_Immediate:
172 if (!Modifier || strcmp(Modifier, "nohash"))
176 case MachineOperand::MO_MachineBasicBlock:
177 GetMBBSymbol(MO.getMBB()->getNumber())->print(O, MAI);
179 case MachineOperand::MO_GlobalAddress: {
180 bool isMemOp = Modifier && !strcmp(Modifier, "mem");
181 std::string Name = Mang->getMangledName(MO.getGlobal());
182 uint64_t Offset = MO.getOffset();
184 O << (isMemOp ? '&' : '#');
186 O << '(' << Offset << '+';
194 case MachineOperand::MO_ExternalSymbol: {
195 bool isMemOp = Modifier && !strcmp(Modifier, "mem");
196 std::string Name(MAI->getGlobalPrefix());
197 Name += MO.getSymbolName();
199 O << (isMemOp ? '&' : '#') << Name;
204 llvm_unreachable("Not implemented yet!");
208 void MSP430AsmPrinter::printSrcMemOperand(const MachineInstr *MI, int OpNum,
209 const char* Modifier) {
210 const MachineOperand &Base = MI->getOperand(OpNum);
211 const MachineOperand &Disp = MI->getOperand(OpNum+1);
214 printOperand(MI, OpNum, "mem");
215 else if (Disp.isImm() && !Base.getReg())
216 printOperand(MI, OpNum);
217 else if (Base.getReg()) {
219 printOperand(MI, OpNum + 1, "nohash");
221 printOperand(MI, OpNum);
225 printOperand(MI, OpNum);
228 llvm_unreachable("Unsupported memory operand");
231 void MSP430AsmPrinter::printCCOperand(const MachineInstr *MI, int OpNum) {
232 unsigned CC = MI->getOperand(OpNum).getImm();
236 llvm_unreachable("Unsupported CC code");
241 case MSP430::COND_NE:
244 case MSP430::COND_HS:
247 case MSP430::COND_LO:
250 case MSP430::COND_GE:
259 /// PrintAsmOperand - Print out an operand for an inline asm expression.
261 bool MSP430AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
263 const char *ExtraCode) {
264 // Does this asm operand have a single letter operand modifier?
265 if (ExtraCode && ExtraCode[0])
266 return true; // Unknown modifier.
268 printOperand(MI, OpNo);
272 bool MSP430AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
273 unsigned OpNo, unsigned AsmVariant,
274 const char *ExtraCode) {
275 if (ExtraCode && ExtraCode[0]) {
276 return true; // Unknown modifier.
278 printSrcMemOperand(MI, OpNo);
282 // Force static initialization.
283 extern "C" void LLVMInitializeMSP430AsmPrinter() {
284 RegisterAsmPrinter<MSP430AsmPrinter> X(TheMSP430Target);