| //===-- SparcAsmPrinter.cpp - Sparc LLVM assembly writer ------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file contains a printer that converts from our internal representation |
| // of machine-dependent LLVM code to GAS-format SPARC assembly language. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #define DEBUG_TYPE "asm-printer" |
| #include "Sparc.h" |
| #include "SparcInstrInfo.h" |
| #include "llvm/Constants.h" |
| #include "llvm/DerivedTypes.h" |
| #include "llvm/Module.h" |
| #include "llvm/CodeGen/AsmPrinter.h" |
| #include "llvm/CodeGen/MachineFunctionPass.h" |
| #include "llvm/CodeGen/MachineConstantPool.h" |
| #include "llvm/CodeGen/MachineInstr.h" |
| #include "llvm/Target/TargetAsmInfo.h" |
| #include "llvm/Target/TargetData.h" |
| #include "llvm/Target/TargetMachine.h" |
| #include "llvm/Support/Mangler.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include "llvm/ADT/Statistic.h" |
| #include "llvm/ADT/StringExtras.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/MathExtras.h" |
| #include <cctype> |
| #include <cstring> |
| #include <map> |
| using namespace llvm; |
| |
| STATISTIC(EmittedInsts, "Number of machine instrs printed"); |
| |
| namespace { |
| struct VISIBILITY_HIDDEN SparcAsmPrinter : public AsmPrinter { |
| SparcAsmPrinter(raw_ostream &O, TargetMachine &TM, const TargetAsmInfo *T) |
| : AsmPrinter(O, TM, T) { |
| } |
| |
| /// We name each basic block in a Function with a unique number, so |
| /// that we can consistently refer to them later. This is cleared |
| /// at the beginning of each call to runOnMachineFunction(). |
| /// |
| typedef std::map<const Value *, unsigned> ValueMapTy; |
| ValueMapTy NumberForBB; |
| |
| virtual const char *getPassName() const { |
| return "Sparc Assembly Printer"; |
| } |
| |
| void printModuleLevelGV(const GlobalVariable* GVar); |
| void printOperand(const MachineInstr *MI, int opNum); |
| void printMemOperand(const MachineInstr *MI, int opNum, |
| const char *Modifier = 0); |
| void printCCOperand(const MachineInstr *MI, int opNum); |
| |
| bool printInstruction(const MachineInstr *MI); // autogenerated. |
| bool runOnMachineFunction(MachineFunction &F); |
| bool doInitialization(Module &M); |
| bool doFinalization(Module &M); |
| bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo, |
| unsigned AsmVariant, const char *ExtraCode); |
| bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo, |
| unsigned AsmVariant, const char *ExtraCode); |
| }; |
| } // end of anonymous namespace |
| |
| #include "SparcGenAsmWriter.inc" |
| |
| /// createSparcCodePrinterPass - Returns a pass that prints the SPARC |
| /// assembly code for a MachineFunction to the given output stream, |
| /// using the given target machine description. This should work |
| /// regardless of whether the function is in SSA form. |
| /// |
| FunctionPass *llvm::createSparcCodePrinterPass(raw_ostream &o, |
| TargetMachine &tm) { |
| return new SparcAsmPrinter(o, tm, tm.getTargetAsmInfo()); |
| } |
| |
| /// runOnMachineFunction - This uses the printInstruction() |
| /// method to print assembly for each instruction. |
| /// |
| bool SparcAsmPrinter::runOnMachineFunction(MachineFunction &MF) { |
| SetupMachineFunction(MF); |
| |
| // Print out constants referenced by the function |
| EmitConstantPool(MF.getConstantPool()); |
| |
| // BBNumber is used here so that a given Printer will never give two |
| // BBs the same name. (If you have a better way, please let me know!) |
| static unsigned BBNumber = 0; |
| |
| O << "\n\n"; |
| // What's my mangled name? |
| CurrentFnName = Mang->getValueName(MF.getFunction()); |
| |
| // Print out the label for the function. |
| const Function *F = MF.getFunction(); |
| SwitchToSection(TAI->SectionForGlobal(F)); |
| EmitAlignment(4, F); |
| O << "\t.globl\t" << CurrentFnName << '\n'; |
| |
| printVisibility(CurrentFnName, F->getVisibility()); |
| |
| O << "\t.type\t" << CurrentFnName << ", #function\n"; |
| O << CurrentFnName << ":\n"; |
| |
| // Number each basic block so that we can consistently refer to them |
| // in PC-relative references. |
| // FIXME: Why not use the MBB numbers? |
| NumberForBB.clear(); |
| for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); |
| I != E; ++I) { |
| NumberForBB[I->getBasicBlock()] = BBNumber++; |
| } |
| |
| // Print out code for the function. |
| for (MachineFunction::const_iterator I = MF.begin(), E = MF.end(); |
| I != E; ++I) { |
| // Print a label for the basic block. |
| if (I != MF.begin()) { |
| printBasicBlockLabel(I, true, true); |
| O << '\n'; |
| } |
| for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end(); |
| II != E; ++II) { |
| // Print the assembly for the instruction. |
| printInstruction(II); |
| ++EmittedInsts; |
| } |
| } |
| |
| // We didn't modify anything. |
| return false; |
| } |
| |
| void SparcAsmPrinter::printOperand(const MachineInstr *MI, int opNum) { |
| const MachineOperand &MO = MI->getOperand (opNum); |
| const TargetRegisterInfo &RI = *TM.getRegisterInfo(); |
| bool CloseParen = false; |
| if (MI->getOpcode() == SP::SETHIi && !MO.isReg() && !MO.isImm()) { |
| O << "%hi("; |
| CloseParen = true; |
| } else if ((MI->getOpcode() == SP::ORri || MI->getOpcode() == SP::ADDri) && |
| !MO.isReg() && !MO.isImm()) { |
| O << "%lo("; |
| CloseParen = true; |
| } |
| switch (MO.getType()) { |
| case MachineOperand::MO_Register: |
| if (TargetRegisterInfo::isPhysicalRegister(MO.getReg())) |
| O << "%" << LowercaseString (RI.get(MO.getReg()).AsmName); |
| else |
| O << "%reg" << MO.getReg(); |
| break; |
| |
| case MachineOperand::MO_Immediate: |
| O << (int)MO.getImm(); |
| break; |
| case MachineOperand::MO_MachineBasicBlock: |
| printBasicBlockLabel(MO.getMBB()); |
| return; |
| case MachineOperand::MO_GlobalAddress: |
| O << Mang->getValueName(MO.getGlobal()); |
| break; |
| case MachineOperand::MO_ExternalSymbol: |
| O << MO.getSymbolName(); |
| break; |
| case MachineOperand::MO_ConstantPoolIndex: |
| O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_" |
| << MO.getIndex(); |
| break; |
| default: |
| O << "<unknown operand type>"; abort (); break; |
| } |
| if (CloseParen) O << ")"; |
| } |
| |
| void SparcAsmPrinter::printMemOperand(const MachineInstr *MI, int opNum, |
| const char *Modifier) { |
| printOperand(MI, opNum); |
| |
| // If this is an ADD operand, emit it like normal operands. |
| if (Modifier && !strcmp(Modifier, "arith")) { |
| O << ", "; |
| printOperand(MI, opNum+1); |
| return; |
| } |
| |
| if (MI->getOperand(opNum+1).isReg() && |
| MI->getOperand(opNum+1).getReg() == SP::G0) |
| return; // don't print "+%g0" |
| if (MI->getOperand(opNum+1).isImm() && |
| MI->getOperand(opNum+1).getImm() == 0) |
| return; // don't print "+0" |
| |
| O << "+"; |
| if (MI->getOperand(opNum+1).isGlobal() || |
| MI->getOperand(opNum+1).isCPI()) { |
| O << "%lo("; |
| printOperand(MI, opNum+1); |
| O << ")"; |
| } else { |
| printOperand(MI, opNum+1); |
| } |
| } |
| |
| void SparcAsmPrinter::printCCOperand(const MachineInstr *MI, int opNum) { |
| int CC = (int)MI->getOperand(opNum).getImm(); |
| O << SPARCCondCodeToString((SPCC::CondCodes)CC); |
| } |
| |
| bool SparcAsmPrinter::doInitialization(Module &M) { |
| Mang = new Mangler(M); |
| return false; // success |
| } |
| |
| bool SparcAsmPrinter::doFinalization(Module &M) { |
| // Print out module-level global variables here. |
| for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); |
| I != E; ++I) |
| printModuleLevelGV(I); |
| |
| O << '\n'; |
| |
| return AsmPrinter::doFinalization(M); |
| } |
| |
| void SparcAsmPrinter::printModuleLevelGV(const GlobalVariable* GVar) { |
| const TargetData *TD = TM.getTargetData(); |
| |
| if (!GVar->hasInitializer()) |
| return; // External global require no code |
| |
| // Check to see if this is a special global used by LLVM, if so, emit it. |
| if (EmitSpecialLLVMGlobal(GVar)) |
| return; |
| |
| O << "\n\n"; |
| std::string name = Mang->getValueName(GVar); |
| Constant *C = GVar->getInitializer(); |
| unsigned Size = TD->getTypePaddedSize(C->getType()); |
| unsigned Align = TD->getPreferredAlignment(GVar); |
| |
| printVisibility(name, GVar->getVisibility()); |
| |
| SwitchToSection(TAI->SectionForGlobal(GVar)); |
| |
| if (C->isNullValue() && !GVar->hasSection()) { |
| if (!GVar->isThreadLocal() && |
| (GVar->hasInternalLinkage() || GVar->mayBeOverridden())) { |
| if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it. |
| |
| if (GVar->hasInternalLinkage()) |
| O << "\t.local " << name << '\n'; |
| |
| O << TAI->getCOMMDirective() << name << ',' << Size; |
| if (TAI->getCOMMDirectiveTakesAlignment()) |
| O << ',' << (1 << Align); |
| |
| O << '\n'; |
| return; |
| } |
| } |
| |
| switch (GVar->getLinkage()) { |
| case GlobalValue::CommonLinkage: |
| case GlobalValue::LinkOnceLinkage: |
| case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak. |
| // Nonnull linkonce -> weak |
| O << "\t.weak " << name << '\n'; |
| break; |
| case GlobalValue::AppendingLinkage: |
| // FIXME: appending linkage variables should go into a section of |
| // their name or something. For now, just emit them as external. |
| case GlobalValue::ExternalLinkage: |
| // If external or appending, declare as a global symbol |
| O << TAI->getGlobalDirective() << name << '\n'; |
| // FALL THROUGH |
| case GlobalValue::InternalLinkage: |
| break; |
| case GlobalValue::GhostLinkage: |
| cerr << "Should not have any unmaterialized functions!\n"; |
| abort(); |
| case GlobalValue::DLLImportLinkage: |
| cerr << "DLLImport linkage is not supported by this target!\n"; |
| abort(); |
| case GlobalValue::DLLExportLinkage: |
| cerr << "DLLExport linkage is not supported by this target!\n"; |
| abort(); |
| default: |
| assert(0 && "Unknown linkage type!"); |
| } |
| |
| EmitAlignment(Align, GVar); |
| |
| if (TAI->hasDotTypeDotSizeDirective()) { |
| O << "\t.type " << name << ",#object\n"; |
| O << "\t.size " << name << ',' << Size << '\n'; |
| } |
| |
| O << name << ":\n"; |
| EmitGlobalConstant(C); |
| } |
| |
| /// PrintAsmOperand - Print out an operand for an inline asm expression. |
| /// |
| bool SparcAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo, |
| unsigned AsmVariant, |
| const char *ExtraCode) { |
| if (ExtraCode && ExtraCode[0]) { |
| if (ExtraCode[1] != 0) return true; // Unknown modifier. |
| |
| switch (ExtraCode[0]) { |
| default: return true; // Unknown modifier. |
| case 'r': |
| break; |
| } |
| } |
| |
| printOperand(MI, OpNo); |
| |
| return false; |
| } |
| |
| bool SparcAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, |
| unsigned OpNo, |
| unsigned AsmVariant, |
| const char *ExtraCode) { |
| if (ExtraCode && ExtraCode[0]) |
| return true; // Unknown modifier |
| |
| O << '['; |
| printMemOperand(MI, OpNo); |
| O << ']'; |
| |
| return false; |
| } |