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/Target/TargetData.h"
29 #include "llvm/Target/TargetLoweringObjectFile.h"
30 #include "llvm/Target/TargetRegistry.h"
31 #include "llvm/Support/Mangler.h"
32 #include "llvm/ADT/Statistic.h"
33 #include "llvm/Support/FormattedStream.h"
37 STATISTIC(EmittedInsts, "Number of machine instrs printed");
40 class VISIBILITY_HIDDEN BlackfinAsmPrinter : public AsmPrinter {
42 BlackfinAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
43 const MCAsmInfo *MAI, bool V)
44 : AsmPrinter(O, TM, MAI, V) {}
46 virtual const char *getPassName() const {
47 return "Blackfin Assembly Printer";
50 void printOperand(const MachineInstr *MI, int opNum);
51 void printMemoryOperand(const MachineInstr *MI, int opNum);
52 void printInstruction(const MachineInstr *MI); // autogenerated.
53 void emitLinkage(const std::string &n, GlobalValue::LinkageTypes l);
54 bool runOnMachineFunction(MachineFunction &F);
55 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
56 unsigned AsmVariant, const char *ExtraCode);
57 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
58 unsigned AsmVariant, const char *ExtraCode);
59 void PrintGlobalVariable(const GlobalVariable* GVar);
61 } // end of anonymous namespace
63 #include "BlackfinGenAsmWriter.inc"
65 extern "C" void LLVMInitializeBlackfinAsmPrinter() {
66 RegisterAsmPrinter<BlackfinAsmPrinter> X(TheBlackfinTarget);
69 void BlackfinAsmPrinter::emitLinkage(const std::string &name,
70 GlobalValue::LinkageTypes l) {
72 default: llvm_unreachable("Unknown linkage type!");
73 case GlobalValue::InternalLinkage: // Symbols default to internal.
74 case GlobalValue::PrivateLinkage:
75 case GlobalValue::LinkerPrivateLinkage:
77 case GlobalValue::ExternalLinkage:
78 O << MAI->getGlobalDirective() << name << "\n";
80 case GlobalValue::LinkOnceAnyLinkage:
81 case GlobalValue::LinkOnceODRLinkage:
82 case GlobalValue::WeakAnyLinkage:
83 case GlobalValue::WeakODRLinkage:
84 O << MAI->getGlobalDirective() << name << "\n";
85 O << MAI->getWeakDefDirective() << name << "\n";
90 void BlackfinAsmPrinter::PrintGlobalVariable(const GlobalVariable* GV) {
91 const TargetData *TD = TM.getTargetData();
93 if (!GV->hasInitializer() || EmitSpecialLLVMGlobal(GV))
96 std::string name = Mang->getMangledName(GV);
97 Constant *C = GV->getInitializer();
99 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(GV, Mang,
101 emitLinkage(name, GV->getLinkage());
102 EmitAlignment(TD->getPreferredAlignmentLog(GV), GV);
103 printVisibility(name, GV->getVisibility());
105 O << "\t.type " << name << ", STT_OBJECT\n";
106 O << "\t.size " << name << ',' << TD->getTypeAllocSize(C->getType()) << '\n';
108 EmitGlobalConstant(C);
111 /// runOnMachineFunction - This uses the printInstruction()
112 /// method to print assembly for each instruction.
114 bool BlackfinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
115 SetupMachineFunction(MF);
116 EmitConstantPool(MF.getConstantPool());
117 EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
119 const Function *F = MF.getFunction();
120 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
122 emitLinkage(CurrentFnName, F->getLinkage());
123 printVisibility(CurrentFnName, F->getVisibility());
125 O << "\t.type\t" << CurrentFnName << ", STT_FUNC\n"
126 << CurrentFnName << ":\n";
129 DW->BeginFunction(&MF);
131 // Print out code for the function.
132 for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
134 // Print a label for the basic block.
135 if (!VerboseAsm && (I->pred_empty() || I->isOnlyReachableByFallthrough())) {
136 // This is an entry block or a block that's only reachable via a
137 // fallthrough edge. In non-VerboseAsm mode, don't print the label.
139 printBasicBlockLabel(I, true, true, VerboseAsm);
143 for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
145 // Print the assembly for the instruction.
146 processDebugLoc(II->getDebugLoc());
148 printInstruction(II);
149 if (VerboseAsm && !II->getDebugLoc().isUnknown())
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 const TargetRegisterInfo &RI = *TM.getRegisterInfo();
168 switch (MO.getType()) {
169 case MachineOperand::MO_Register:
170 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
171 "Virtual registers should be already mapped!");
172 O << RI.get(MO.getReg()).AsmName;
175 case MachineOperand::MO_Immediate:
178 case MachineOperand::MO_MachineBasicBlock:
179 printBasicBlockLabel(MO.getMBB(), false, false, false);
181 case MachineOperand::MO_GlobalAddress:
182 O << Mang->getMangledName(MO.getGlobal());
183 printOffset(MO.getOffset());
185 case MachineOperand::MO_ExternalSymbol:
186 O << Mang->makeNameProper(MO.getSymbolName());
188 case MachineOperand::MO_ConstantPoolIndex:
189 O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
192 case MachineOperand::MO_JumpTableIndex:
193 O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
194 << '_' << MO.getIndex();
197 llvm_unreachable("<unknown operand type>");
202 void BlackfinAsmPrinter::printMemoryOperand(const MachineInstr *MI, int opNum) {
203 printOperand(MI, opNum);
205 if (MI->getOperand(opNum+1).isImm() && MI->getOperand(opNum+1).getImm() == 0)
209 printOperand(MI, opNum+1);
212 /// PrintAsmOperand - Print out an operand for an inline asm expression.
214 bool BlackfinAsmPrinter::PrintAsmOperand(const MachineInstr *MI,
217 const char *ExtraCode) {
218 if (ExtraCode && ExtraCode[0]) {
219 if (ExtraCode[1] != 0) return true; // Unknown modifier.
221 switch (ExtraCode[0]) {
222 default: return true; // Unknown modifier.
228 printOperand(MI, OpNo);
233 bool BlackfinAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
236 const char *ExtraCode) {
237 if (ExtraCode && ExtraCode[0])
238 return true; // Unknown modifier
241 printOperand(MI, OpNo);