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a CC as an operand. Much smaller, much happier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25839 91177308-0d34-0410-b5e6-96231b3b80d8
296 lines
10 KiB
C++
296 lines
10 KiB
C++
//===-- SparcV8AsmPrinter.cpp - SparcV8 LLVM assembly writer --------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains a printer that converts from our internal representation
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// of machine-dependent LLVM code to GAS-format Sparc V8 assembly language.
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//
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//===----------------------------------------------------------------------===//
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#include "SparcV8.h"
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#include "SparcV8InstrInfo.h"
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Module.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineConstantPool.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Support/Mangler.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/MathExtras.h"
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#include <cctype>
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#include <iostream>
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using namespace llvm;
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namespace {
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Statistic<> EmittedInsts("asm-printer", "Number of machine instrs printed");
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struct SparcV8AsmPrinter : public AsmPrinter {
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SparcV8AsmPrinter(std::ostream &O, TargetMachine &TM) : AsmPrinter(O, TM) {
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Data16bitsDirective = "\t.half\t";
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Data32bitsDirective = "\t.word\t";
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Data64bitsDirective = 0; // .xword is only supported by V9.
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ZeroDirective = 0; // no .zero or .space!
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CommentString = "!";
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ConstantPoolSection = "\t.section \".rodata\",#alloc\n";
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}
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/// We name each basic block in a Function with a unique number, so
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/// that we can consistently refer to them later. This is cleared
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/// at the beginning of each call to runOnMachineFunction().
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///
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typedef std::map<const Value *, unsigned> ValueMapTy;
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ValueMapTy NumberForBB;
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virtual const char *getPassName() const {
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return "SparcV8 Assembly Printer";
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}
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void printOperand(const MachineInstr *MI, int opNum);
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void printMemOperand(const MachineInstr *MI, int opNum);
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void printV8CCOperand(const MachineInstr *MI, int opNum);
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bool printInstruction(const MachineInstr *MI); // autogenerated.
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bool runOnMachineFunction(MachineFunction &F);
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bool doInitialization(Module &M);
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bool doFinalization(Module &M);
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};
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} // end of anonymous namespace
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#include "SparcV8GenAsmWriter.inc"
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/// createSparcV8CodePrinterPass - Returns a pass that prints the SparcV8
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/// assembly code for a MachineFunction to the given output stream,
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/// using the given target machine description. This should work
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/// regardless of whether the function is in SSA form.
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///
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FunctionPass *llvm::createSparcV8CodePrinterPass (std::ostream &o,
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TargetMachine &tm) {
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return new SparcV8AsmPrinter(o, tm);
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}
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/// runOnMachineFunction - This uses the printMachineInstruction()
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/// method to print assembly for each instruction.
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///
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bool SparcV8AsmPrinter::runOnMachineFunction(MachineFunction &MF) {
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SetupMachineFunction(MF);
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// Print out constants referenced by the function
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EmitConstantPool(MF.getConstantPool());
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// BBNumber is used here so that a given Printer will never give two
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// BBs the same name. (If you have a better way, please let me know!)
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static unsigned BBNumber = 0;
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O << "\n\n";
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// What's my mangled name?
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CurrentFnName = Mang->getValueName(MF.getFunction());
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// Print out labels for the function.
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O << "\t.text\n";
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O << "\t.align 16\n";
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O << "\t.globl\t" << CurrentFnName << "\n";
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O << "\t.type\t" << CurrentFnName << ", #function\n";
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O << CurrentFnName << ":\n";
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// Number each basic block so that we can consistently refer to them
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// in PC-relative references.
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NumberForBB.clear();
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for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
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I != E; ++I) {
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NumberForBB[I->getBasicBlock()] = BBNumber++;
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}
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// Print out code for the function.
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for (MachineFunction::const_iterator I = MF.begin(), E = MF.end();
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I != E; ++I) {
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// Print a label for the basic block.
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if (I != MF.begin())
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O << ".LBB" << Mang->getValueName(MF.getFunction ())
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<< "_" << I->getNumber () << ":\t! "
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<< I->getBasicBlock ()->getName () << "\n";
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for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
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II != E; ++II) {
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// Print the assembly for the instruction.
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O << "\t";
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printInstruction(II);
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++EmittedInsts;
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}
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}
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// We didn't modify anything.
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return false;
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}
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void SparcV8AsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
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const MachineOperand &MO = MI->getOperand (opNum);
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const MRegisterInfo &RI = *TM.getRegisterInfo();
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bool CloseParen = false;
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if (MI->getOpcode() == V8::SETHIi && !MO.isRegister() && !MO.isImmediate()) {
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O << "%hi(";
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CloseParen = true;
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} else if ((MI->getOpcode() == V8::ORri || MI->getOpcode() == V8::ADDri)
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&& !MO.isRegister() && !MO.isImmediate()) {
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O << "%lo(";
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CloseParen = true;
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}
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switch (MO.getType()) {
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case MachineOperand::MO_VirtualRegister:
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if (Value *V = MO.getVRegValueOrNull()) {
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O << "<" << V->getName() << ">";
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break;
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}
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// FALLTHROUGH
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case MachineOperand::MO_MachineRegister:
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if (MRegisterInfo::isPhysicalRegister(MO.getReg()))
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O << "%" << LowercaseString (RI.get(MO.getReg()).Name);
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else
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O << "%reg" << MO.getReg();
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break;
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case MachineOperand::MO_SignExtendedImmed:
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case MachineOperand::MO_UnextendedImmed:
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O << (int)MO.getImmedValue();
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break;
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case MachineOperand::MO_MachineBasicBlock: {
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MachineBasicBlock *MBBOp = MO.getMachineBasicBlock();
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O << ".LBB" << Mang->getValueName(MBBOp->getParent()->getFunction())
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<< "_" << MBBOp->getNumber () << "\t! "
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<< MBBOp->getBasicBlock ()->getName ();
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return;
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}
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case MachineOperand::MO_PCRelativeDisp:
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std::cerr << "Shouldn't use addPCDisp() when building SparcV8 MachineInstrs";
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abort ();
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return;
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case MachineOperand::MO_GlobalAddress:
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O << Mang->getValueName(MO.getGlobal());
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break;
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case MachineOperand::MO_ExternalSymbol:
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O << MO.getSymbolName();
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break;
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case MachineOperand::MO_ConstantPoolIndex:
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O << PrivateGlobalPrefix << "CPI" << getFunctionNumber() << "_"
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<< MO.getConstantPoolIndex();
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break;
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default:
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O << "<unknown operand type>"; abort (); break;
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}
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if (CloseParen) O << ")";
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}
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void SparcV8AsmPrinter::printMemOperand(const MachineInstr *MI, int opNum) {
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printOperand(MI, opNum);
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MachineOperand::MachineOperandType OpTy = MI->getOperand(opNum+1).getType();
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if ((OpTy == MachineOperand::MO_VirtualRegister ||
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OpTy == MachineOperand::MO_MachineRegister) &&
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MI->getOperand(opNum+1).getReg() == V8::G0)
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return; // don't print "+%g0"
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if ((OpTy == MachineOperand::MO_SignExtendedImmed ||
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OpTy == MachineOperand::MO_UnextendedImmed) &&
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MI->getOperand(opNum+1).getImmedValue() == 0)
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return; // don't print "+0"
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O << "+";
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if (OpTy == MachineOperand::MO_GlobalAddress ||
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OpTy == MachineOperand::MO_ConstantPoolIndex) {
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O << "%lo(";
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printOperand(MI, opNum+1);
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O << ")";
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} else {
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printOperand(MI, opNum+1);
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}
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}
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void SparcV8AsmPrinter::printV8CCOperand(const MachineInstr *MI, int opNum) {
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int CC = (int)MI->getOperand(opNum).getImmedValue();
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O << SPARCCondCodeToString((V8CC::CondCodes)CC);
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}
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bool SparcV8AsmPrinter::doInitialization(Module &M) {
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Mang = new Mangler(M);
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return false; // success
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}
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bool SparcV8AsmPrinter::doFinalization(Module &M) {
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const TargetData &TD = TM.getTargetData();
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// Print out module-level global variables here.
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for (Module::const_global_iterator I = M.global_begin(), E = M.global_end(); I != E; ++I)
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if (I->hasInitializer()) { // External global require no code
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O << "\n\n";
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std::string name = Mang->getValueName(I);
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Constant *C = I->getInitializer();
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unsigned Size = TD.getTypeSize(C->getType());
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unsigned Align = TD.getTypeAlignment(C->getType());
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if (C->isNullValue() &&
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(I->hasLinkOnceLinkage() || I->hasInternalLinkage() ||
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I->hasWeakLinkage() /* FIXME: Verify correct */)) {
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SwitchSection(".data", I);
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if (I->hasInternalLinkage())
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O << "\t.local " << name << "\n";
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O << "\t.comm " << name << "," << TD.getTypeSize(C->getType())
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<< "," << (unsigned)TD.getTypeAlignment(C->getType());
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O << "\t\t! ";
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WriteAsOperand(O, I, true, true, &M);
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O << "\n";
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} else {
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switch (I->getLinkage()) {
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case GlobalValue::LinkOnceLinkage:
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case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
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// Nonnull linkonce -> weak
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O << "\t.weak " << name << "\n";
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SwitchSection("", I);
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O << "\t.section\t\".llvm.linkonce.d." << name
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<< "\",\"aw\",@progbits\n";
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break;
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case GlobalValue::AppendingLinkage:
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// FIXME: appending linkage variables should go into a section of
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// their name or something. For now, just emit them as external.
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case GlobalValue::ExternalLinkage:
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// If external or appending, declare as a global symbol
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O << "\t.globl " << name << "\n";
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// FALL THROUGH
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case GlobalValue::InternalLinkage:
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if (C->isNullValue())
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SwitchSection(".bss", I);
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else
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SwitchSection(".data", I);
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break;
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case GlobalValue::GhostLinkage:
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std::cerr << "Should not have any unmaterialized functions!\n";
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abort();
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}
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O << "\t.align " << Align << "\n";
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O << "\t.type " << name << ",#object\n";
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O << "\t.size " << name << "," << Size << "\n";
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O << name << ":\t\t\t\t! ";
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WriteAsOperand(O, I, true, true, &M);
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O << " = ";
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WriteAsOperand(O, C, false, false, &M);
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O << "\n";
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EmitGlobalConstant(C);
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}
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}
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AsmPrinter::doFinalization(M);
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return false; // success
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}
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