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/FormattedStream.h"
33 #include "llvm/Support/Mangler.h"
34 #include "llvm/Support/ErrorHandling.h"
38 STATISTIC(EmittedInsts, "Number of machine instrs printed");
41 class VISIBILITY_HIDDEN MSP430AsmPrinter : public AsmPrinter {
43 MSP430AsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
44 const TargetAsmInfo *TAI, bool V)
45 : AsmPrinter(O, TM, TAI, 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);
62 virtual void PrintGlobalVariable(const GlobalVariable *GV) {
63 // FIXME: No support for global variables?
66 void getAnalysisUsage(AnalysisUsage &AU) const {
67 AsmPrinter::getAnalysisUsage(AU);
71 } // end of anonymous namespace
73 #include "MSP430GenAsmWriter.inc"
75 /// createMSP430CodePrinterPass - Returns a pass that prints the MSP430
76 /// assembly code for a MachineFunction to the given output stream,
77 /// using the given target machine description. This should work
78 /// regardless of whether the function is in SSA form.
80 FunctionPass *llvm::createMSP430CodePrinterPass(formatted_raw_ostream &o,
83 return new MSP430AsmPrinter(o, tm, tm.getTargetAsmInfo(), verbose);
87 void MSP430AsmPrinter::emitFunctionHeader(const MachineFunction &MF) {
88 const Function *F = MF.getFunction();
90 SwitchToSection(TAI->SectionForGlobal(F));
92 unsigned FnAlign = MF.getAlignment();
93 EmitAlignment(FnAlign, F);
95 switch (F->getLinkage()) {
96 default: llvm_unreachable("Unknown linkage type!");
97 case Function::InternalLinkage: // Symbols default to internal.
98 case Function::PrivateLinkage:
99 case Function::LinkerPrivateLinkage:
101 case Function::ExternalLinkage:
102 O << "\t.globl\t" << CurrentFnName << '\n';
104 case Function::LinkOnceAnyLinkage:
105 case Function::LinkOnceODRLinkage:
106 case Function::WeakAnyLinkage:
107 case Function::WeakODRLinkage:
108 O << "\t.weak\t" << CurrentFnName << '\n';
112 printVisibility(CurrentFnName, F->getVisibility());
114 O << "\t.type\t" << CurrentFnName << ",@function\n"
115 << CurrentFnName << ":\n";
118 bool MSP430AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
119 SetupMachineFunction(MF);
122 // Print the 'header' of function
123 emitFunctionHeader(MF);
125 // Print out code for the function.
126 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
128 // Print a label for the basic block.
129 if (!VerboseAsm && (I->pred_empty() || I->isOnlyReachableByFallthrough())) {
130 // This is an entry block or a block that's only reachable via a
131 // fallthrough edge. In non-VerboseAsm mode, don't print the label.
133 printBasicBlockLabel(I, true, true, VerboseAsm);
137 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
139 // Print the assembly for the instruction.
140 printMachineInstruction(II);
143 if (TAI->hasDotTypeDotSizeDirective())
144 O << "\t.size\t" << CurrentFnName << ", .-" << CurrentFnName << '\n';
148 // We didn't modify anything
152 void MSP430AsmPrinter::printMachineInstruction(const MachineInstr *MI) {
155 // Call the autogenerated instruction printer routines.
156 if (printInstruction(MI))
159 llvm_unreachable("Should not happen");
162 void MSP430AsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
163 const char* Modifier) {
164 const MachineOperand &MO = MI->getOperand(OpNum);
165 switch (MO.getType()) {
166 case MachineOperand::MO_Register:
167 assert (TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
168 "Virtual registers should be already mapped!");
169 O << TM.getRegisterInfo()->get(MO.getReg()).AsmName;
171 case MachineOperand::MO_Immediate:
172 if (!Modifier || strcmp(Modifier, "nohash"))
176 case MachineOperand::MO_MachineBasicBlock:
177 printBasicBlockLabel(MO.getMBB());
179 case MachineOperand::MO_GlobalAddress: {
180 bool isMemOp = Modifier && !strcmp(Modifier, "mem");
181 bool isCallOp = Modifier && !strcmp(Modifier, "call");
182 std::string Name = Mang->getMangledName(MO.getGlobal());
183 assert(MO.getOffset() == 0 && "No offsets allowed!");
194 case MachineOperand::MO_ExternalSymbol: {
195 bool isCallOp = Modifier && !strcmp(Modifier, "call");
196 std::string Name(TAI->getGlobalPrefix());
197 Name += MO.getSymbolName();
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: