1 //===-- BlackfinAsmPrinter.cpp - Blackfin 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 BLACKFIN assembly language.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "asm-printer"
17 #include "BlackfinInstrInfo.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/MC/MCStreamer.h"
27 #include "llvm/MC/MCAsmInfo.h"
28 #include "llvm/MC/MCContext.h"
29 #include "llvm/MC/MCSymbol.h"
30 #include "llvm/Target/TargetData.h"
31 #include "llvm/Target/TargetLoweringObjectFile.h"
32 #include "llvm/Target/TargetRegistry.h"
33 #include "llvm/Support/Mangler.h"
34 #include "llvm/ADT/Statistic.h"
35 #include "llvm/ADT/SmallString.h"
36 #include "llvm/Support/ErrorHandling.h"
37 #include "llvm/Support/FormattedStream.h"
40 STATISTIC(EmittedInsts, "Number of machine instrs printed");
43 class BlackfinAsmPrinter : public AsmPrinter {
45 BlackfinAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
46 const MCAsmInfo *MAI, bool V)
47 : AsmPrinter(O, TM, MAI, V) {}
49 virtual const char *getPassName() const {
50 return "Blackfin Assembly Printer";
53 void printOperand(const MachineInstr *MI, int opNum);
54 void printMemoryOperand(const MachineInstr *MI, int opNum);
55 void printInstruction(const MachineInstr *MI); // autogenerated.
56 static const char *getRegisterName(unsigned RegNo);
58 void emitLinkage(const std::string &n, GlobalValue::LinkageTypes l);
59 bool runOnMachineFunction(MachineFunction &F);
60 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
61 unsigned AsmVariant, const char *ExtraCode);
62 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
63 unsigned AsmVariant, const char *ExtraCode);
64 void PrintGlobalVariable(const GlobalVariable* GVar);
66 } // end of anonymous namespace
68 #include "BlackfinGenAsmWriter.inc"
70 extern "C" void LLVMInitializeBlackfinAsmPrinter() {
71 RegisterAsmPrinter<BlackfinAsmPrinter> X(TheBlackfinTarget);
74 void BlackfinAsmPrinter::emitLinkage(const std::string &name,
75 GlobalValue::LinkageTypes l) {
77 default: llvm_unreachable("Unknown linkage type!");
78 case GlobalValue::InternalLinkage: // Symbols default to internal.
79 case GlobalValue::PrivateLinkage:
80 case GlobalValue::LinkerPrivateLinkage:
82 case GlobalValue::ExternalLinkage:
83 O << MAI->getGlobalDirective() << name << "\n";
85 case GlobalValue::LinkOnceAnyLinkage:
86 case GlobalValue::LinkOnceODRLinkage:
87 case GlobalValue::WeakAnyLinkage:
88 case GlobalValue::WeakODRLinkage:
89 O << MAI->getGlobalDirective() << name << "\n";
90 O << MAI->getWeakDefDirective() << name << "\n";
95 void BlackfinAsmPrinter::PrintGlobalVariable(const GlobalVariable* GV) {
96 const TargetData *TD = TM.getTargetData();
98 if (!GV->hasInitializer() || EmitSpecialLLVMGlobal(GV))
101 std::string name = Mang->getMangledName(GV);
102 Constant *C = GV->getInitializer();
104 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(GV, Mang,
106 emitLinkage(name, GV->getLinkage());
107 EmitAlignment(TD->getPreferredAlignmentLog(GV), GV);
108 printVisibility(name, GV->getVisibility());
110 O << "\t.type " << name << ", STT_OBJECT\n";
111 O << "\t.size " << name << ',' << TD->getTypeAllocSize(C->getType()) << '\n';
113 EmitGlobalConstant(C);
116 /// runOnMachineFunction - This uses the printInstruction()
117 /// method to print assembly for each instruction.
119 bool BlackfinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
120 SetupMachineFunction(MF);
121 EmitConstantPool(MF.getConstantPool());
122 EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
124 const Function *F = MF.getFunction();
125 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
127 emitLinkage(CurrentFnName, F->getLinkage());
128 printVisibility(CurrentFnName, F->getVisibility());
130 O << "\t.type\t" << CurrentFnName << ", STT_FUNC\n"
131 << CurrentFnName << ":\n";
134 DW->BeginFunction(&MF);
136 // Print out code for the function.
137 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
139 // Print a label for the basic block.
140 EmitBasicBlockStart(I);
142 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
144 // Print the assembly for the instruction.
145 processDebugLoc(II, true);
147 printInstruction(II);
152 processDebugLoc(II, false);
157 O << "\t.size " << CurrentFnName << ", .-" << CurrentFnName << "\n";
160 DW->EndFunction(&MF);
165 void BlackfinAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
166 const MachineOperand &MO = MI->getOperand (opNum);
167 switch (MO.getType()) {
168 case MachineOperand::MO_Register:
169 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
170 "Virtual registers should be already mapped!");
171 O << getRegisterName(MO.getReg());
174 case MachineOperand::MO_Immediate:
177 case MachineOperand::MO_MachineBasicBlock:
178 GetMBBSymbol(MO.getMBB()->getNumber())->print(O, MAI);
180 case MachineOperand::MO_GlobalAddress:
181 O << Mang->getMangledName(MO.getGlobal());
182 printOffset(MO.getOffset());
184 case MachineOperand::MO_ExternalSymbol:
185 GetExternalSymbolSymbol(MO.getSymbolName())->print(O, MAI);
187 case MachineOperand::MO_ConstantPoolIndex:
188 O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
191 case MachineOperand::MO_JumpTableIndex:
192 O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
193 << '_' << MO.getIndex();
196 llvm_unreachable("<unknown operand type>");
201 void BlackfinAsmPrinter::printMemoryOperand(const MachineInstr *MI, int opNum) {
202 printOperand(MI, opNum);
204 if (MI->getOperand(opNum+1).isImm() && MI->getOperand(opNum+1).getImm() == 0)
208 printOperand(MI, opNum+1);
211 /// PrintAsmOperand - Print out an operand for an inline asm expression.
213 bool BlackfinAsmPrinter::PrintAsmOperand(const MachineInstr *MI,
216 const char *ExtraCode) {
217 if (ExtraCode && ExtraCode[0]) {
218 if (ExtraCode[1] != 0) return true; // Unknown modifier.
220 switch (ExtraCode[0]) {
221 default: return true; // Unknown modifier.
227 printOperand(MI, OpNo);
232 bool BlackfinAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
235 const char *ExtraCode) {
236 if (ExtraCode && ExtraCode[0])
237 return true; // Unknown modifier
240 printOperand(MI, OpNo);