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/MCSymbol.h"
29 #include "llvm/Target/TargetData.h"
30 #include "llvm/Target/TargetLoweringObjectFile.h"
31 #include "llvm/Target/TargetRegistry.h"
32 #include "llvm/Support/Mangler.h"
33 #include "llvm/ADT/Statistic.h"
34 #include "llvm/Support/FormattedStream.h"
38 STATISTIC(EmittedInsts, "Number of machine instrs printed");
41 class VISIBILITY_HIDDEN BlackfinAsmPrinter : public AsmPrinter {
43 BlackfinAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
44 const MCAsmInfo *MAI, bool V)
45 : AsmPrinter(O, TM, MAI, V) {}
47 virtual const char *getPassName() const {
48 return "Blackfin Assembly Printer";
51 void printOperand(const MachineInstr *MI, int opNum);
52 void printMemoryOperand(const MachineInstr *MI, int opNum);
53 void printInstruction(const MachineInstr *MI); // autogenerated.
54 static const char *getRegisterName(unsigned RegNo);
56 void emitLinkage(const std::string &n, GlobalValue::LinkageTypes l);
57 bool runOnMachineFunction(MachineFunction &F);
58 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
59 unsigned AsmVariant, const char *ExtraCode);
60 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
61 unsigned AsmVariant, const char *ExtraCode);
62 void PrintGlobalVariable(const GlobalVariable* GVar);
64 } // end of anonymous namespace
66 #include "BlackfinGenAsmWriter.inc"
68 extern "C" void LLVMInitializeBlackfinAsmPrinter() {
69 RegisterAsmPrinter<BlackfinAsmPrinter> X(TheBlackfinTarget);
72 void BlackfinAsmPrinter::emitLinkage(const std::string &name,
73 GlobalValue::LinkageTypes l) {
75 default: llvm_unreachable("Unknown linkage type!");
76 case GlobalValue::InternalLinkage: // Symbols default to internal.
77 case GlobalValue::PrivateLinkage:
78 case GlobalValue::LinkerPrivateLinkage:
80 case GlobalValue::ExternalLinkage:
81 O << MAI->getGlobalDirective() << name << "\n";
83 case GlobalValue::LinkOnceAnyLinkage:
84 case GlobalValue::LinkOnceODRLinkage:
85 case GlobalValue::WeakAnyLinkage:
86 case GlobalValue::WeakODRLinkage:
87 O << MAI->getGlobalDirective() << name << "\n";
88 O << MAI->getWeakDefDirective() << name << "\n";
93 void BlackfinAsmPrinter::PrintGlobalVariable(const GlobalVariable* GV) {
94 const TargetData *TD = TM.getTargetData();
96 if (!GV->hasInitializer() || EmitSpecialLLVMGlobal(GV))
99 std::string name = Mang->getMangledName(GV);
100 Constant *C = GV->getInitializer();
102 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(GV, Mang,
104 emitLinkage(name, GV->getLinkage());
105 EmitAlignment(TD->getPreferredAlignmentLog(GV), GV);
106 printVisibility(name, GV->getVisibility());
108 O << "\t.type " << name << ", STT_OBJECT\n";
109 O << "\t.size " << name << ',' << TD->getTypeAllocSize(C->getType()) << '\n';
111 EmitGlobalConstant(C);
114 /// runOnMachineFunction - This uses the printInstruction()
115 /// method to print assembly for each instruction.
117 bool BlackfinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
118 SetupMachineFunction(MF);
119 EmitConstantPool(MF.getConstantPool());
120 EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
122 const Function *F = MF.getFunction();
123 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
125 emitLinkage(CurrentFnName, F->getLinkage());
126 printVisibility(CurrentFnName, F->getVisibility());
128 O << "\t.type\t" << CurrentFnName << ", STT_FUNC\n"
129 << CurrentFnName << ":\n";
132 DW->BeginFunction(&MF);
134 // Print out code for the function.
135 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
137 // Print a label for the basic block.
138 EmitBasicBlockStart(I);
140 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
142 // Print the assembly for the instruction.
143 processDebugLoc(II, true);
145 printInstruction(II);
146 if (VerboseAsm && !II->getDebugLoc().isUnknown())
150 processDebugLoc(II, false);
155 O << "\t.size " << CurrentFnName << ", .-" << CurrentFnName << "\n";
158 DW->EndFunction(&MF);
163 void BlackfinAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
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 << getRegisterName(MO.getReg());
172 case MachineOperand::MO_Immediate:
175 case MachineOperand::MO_MachineBasicBlock:
176 GetMBBSymbol(MO.getMBB()->getNumber())->print(O, MAI);
178 case MachineOperand::MO_GlobalAddress:
179 O << Mang->getMangledName(MO.getGlobal());
180 printOffset(MO.getOffset());
182 case MachineOperand::MO_ExternalSymbol:
183 O << Mang->makeNameProper(MO.getSymbolName());
185 case MachineOperand::MO_ConstantPoolIndex:
186 O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
189 case MachineOperand::MO_JumpTableIndex:
190 O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
191 << '_' << MO.getIndex();
194 llvm_unreachable("<unknown operand type>");
199 void BlackfinAsmPrinter::printMemoryOperand(const MachineInstr *MI, int opNum) {
200 printOperand(MI, opNum);
202 if (MI->getOperand(opNum+1).isImm() && MI->getOperand(opNum+1).getImm() == 0)
206 printOperand(MI, opNum+1);
209 /// PrintAsmOperand - Print out an operand for an inline asm expression.
211 bool BlackfinAsmPrinter::PrintAsmOperand(const MachineInstr *MI,
214 const char *ExtraCode) {
215 if (ExtraCode && ExtraCode[0]) {
216 if (ExtraCode[1] != 0) return true; // Unknown modifier.
218 switch (ExtraCode[0]) {
219 default: return true; // Unknown modifier.
225 printOperand(MI, OpNo);
230 bool BlackfinAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
233 const char *ExtraCode) {
234 if (ExtraCode && ExtraCode[0])
235 return true; // Unknown modifier
238 printOperand(MI, OpNo);