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 "MSP430TargetMachine.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/MachineModuleInfo.h"
25 #include "llvm/CodeGen/MachineFunctionPass.h"
26 #include "llvm/CodeGen/MachineConstantPool.h"
27 #include "llvm/CodeGen/MachineInstr.h"
28 #include "llvm/Target/TargetAsmInfo.h"
29 #include "llvm/Target/TargetData.h"
30 #include "llvm/ADT/Statistic.h"
31 #include "llvm/Support/Compiler.h"
32 #include "llvm/Support/Mangler.h"
33 #include "llvm/Support/raw_ostream.h"
37 STATISTIC(EmittedInsts, "Number of machine instrs printed");
40 class VISIBILITY_HIDDEN MSP430AsmPrinter : public AsmPrinter {
42 MSP430AsmPrinter(raw_ostream &O, MSP430TargetMachine &TM,
43 const TargetAsmInfo *TAI,
44 CodeGenOpt::Level OL, bool V)
45 : AsmPrinter(O, TM, TAI, OL, V) {}
47 virtual const char *getPassName() const {
48 return "MSP430 Assembly Printer";
51 void printOperand(const MachineInstr *MI, int OpNum,
52 const char* Modifier = 0);
53 void printSrcMemOperand(const MachineInstr *MI, int OpNum,
54 const char* Modifier = 0);
55 void printCCOperand(const MachineInstr *MI, int OpNum);
56 bool printInstruction(const MachineInstr *MI); // autogenerated.
57 void printMachineInstruction(const MachineInstr * MI);
59 void emitFunctionHeader(const MachineFunction &MF);
60 bool runOnMachineFunction(MachineFunction &F);
61 bool doInitialization(Module &M);
62 bool doFinalization(Module &M);
64 void getAnalysisUsage(AnalysisUsage &AU) const {
65 AsmPrinter::getAnalysisUsage(AU);
69 } // end of anonymous namespace
71 #include "MSP430GenAsmWriter.inc"
73 /// createMSP430CodePrinterPass - Returns a pass that prints the MSP430
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::createMSP430CodePrinterPass(raw_ostream &o,
79 MSP430TargetMachine &tm,
80 CodeGenOpt::Level OptLevel,
82 return new MSP430AsmPrinter(o, tm, tm.getTargetAsmInfo(), OptLevel, verbose);
85 bool MSP430AsmPrinter::doInitialization(Module &M) {
86 Mang = new Mangler(M, "", TAI->getPrivateGlobalPrefix());
87 return false; // success
91 bool MSP430AsmPrinter::doFinalization(Module &M) {
92 return AsmPrinter::doFinalization(M);
95 void MSP430AsmPrinter::emitFunctionHeader(const MachineFunction &MF) {
96 const Function *F = MF.getFunction();
98 SwitchToSection(TAI->SectionForGlobal(F));
100 unsigned FnAlign = 4;
101 if (F->hasFnAttr(Attribute::OptimizeForSize))
104 EmitAlignment(FnAlign, F);
106 switch (F->getLinkage()) {
107 default: assert(0 && "Unknown linkage type!");
108 case Function::InternalLinkage: // Symbols default to internal.
109 case Function::PrivateLinkage:
111 case Function::ExternalLinkage:
112 O << "\t.globl\t" << CurrentFnName << '\n';
114 case Function::LinkOnceAnyLinkage:
115 case Function::LinkOnceODRLinkage:
116 case Function::WeakAnyLinkage:
117 case Function::WeakODRLinkage:
118 O << "\t.weak\t" << CurrentFnName << '\n';
122 printVisibility(CurrentFnName, F->getVisibility());
124 O << "\t.type\t" << CurrentFnName << ",@function\n"
125 << CurrentFnName << ":\n";
128 bool MSP430AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
129 SetupMachineFunction(MF);
132 // Print the 'header' of function
133 emitFunctionHeader(MF);
135 // Print out code for the function.
136 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
138 // Print a label for the basic block.
139 if (!VerboseAsm && (I->pred_empty() || I->isOnlyReachableByFallthrough())) {
140 // This is an entry block or a block that's only reachable via a
141 // fallthrough edge. In non-VerboseAsm mode, don't print the label.
143 printBasicBlockLabel(I, true, true, VerboseAsm);
147 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
149 // Print the assembly for the instruction.
150 printMachineInstruction(II);
153 if (TAI->hasDotTypeDotSizeDirective())
154 O << "\t.size\t" << CurrentFnName << ", .-" << CurrentFnName << '\n';
158 // We didn't modify anything
162 void MSP430AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
165 // Call the autogenerated instruction printer routines.
166 if (printInstruction(MI))
169 assert(0 && "Should not happen");
172 void MSP430AsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
173 const char* Modifier) {
174 const MachineOperand &MO = MI->getOperand(OpNum);
175 switch (MO.getType()) {
176 case MachineOperand::MO_Register:
177 assert (TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
178 "Virtual registers should be already mapped!");
179 O << TM.getRegisterInfo()->get(MO.getReg()).AsmName;
181 case MachineOperand::MO_Immediate:
182 if (!Modifier || strcmp(Modifier, "nohash"))
186 case MachineOperand::MO_MachineBasicBlock:
187 printBasicBlockLabel(MO.getMBB());
189 case MachineOperand::MO_GlobalAddress: {
190 bool isMemOp = Modifier && !strcmp(Modifier, "mem");
191 bool isCallOp = Modifier && !strcmp(Modifier, "call");
192 std::string Name = Mang->getValueName(MO.getGlobal());
193 assert(MO.getOffset() == 0 && "No offsets allowed!");
204 case MachineOperand::MO_ExternalSymbol: {
205 bool isCallOp = Modifier && !strcmp(Modifier, "call");
206 std::string Name(TAI->getGlobalPrefix());
207 Name += MO.getSymbolName();
214 assert(0 && "Not implemented yet!");
218 void MSP430AsmPrinter::printSrcMemOperand(const MachineInstr *MI, int OpNum,
219 const char* Modifier) {
220 const MachineOperand &Base = MI->getOperand(OpNum);
221 const MachineOperand &Disp = MI->getOperand(OpNum+1);
224 printOperand(MI, OpNum, "mem");
225 else if (Disp.isImm() && !Base.getReg())
226 printOperand(MI, OpNum);
227 else if (Base.getReg()) {
229 printOperand(MI, OpNum + 1, "nohash");
231 printOperand(MI, OpNum);
235 printOperand(MI, OpNum);
238 assert(0 && "Unsupported memory operand");
241 void MSP430AsmPrinter::printCCOperand(const MachineInstr *MI, int OpNum) {
242 unsigned CC = MI->getOperand(OpNum).getImm();
246 assert(0 && "Unsupported CC code");
251 case MSP430::COND_NE:
254 case MSP430::COND_HS:
257 case MSP430::COND_LO:
260 case MSP430::COND_GE: