mirror of
https://github.com/c64scene-ar/llvm-6502.git
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when compiled with debug information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18835 91177308-0d34-0410-b5e6-96231b3b80d8
713 lines
24 KiB
C++
713 lines
24 KiB
C++
//===-- PowerPCAsmPrinter.cpp - Print machine instrs to PowerPC assembly --===//
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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 PowerPC assembly language. This printer is
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// the output mechanism used by `llc'.
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//
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// Documentation at http://developer.apple.com/documentation/DeveloperTools/
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// Reference/Assembler/ASMIntroduction/chapter_1_section_1.html
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "asmprinter"
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#include "PowerPC.h"
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#include "PowerPCTargetMachine.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/MachineConstantPool.h"
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#include "llvm/CodeGen/MachineFunctionPass.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/CodeGen/ValueTypes.h"
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#include "llvm/Support/Mangler.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Target/MRegisterInfo.h"
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#include "llvm/Target/TargetInstrInfo.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/ADT/StringExtras.h"
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#include <set>
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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 PowerPCAsmPrinter : public AsmPrinter {
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std::set<std::string> FnStubs, GVStubs, LinkOnceStubs;
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std::set<std::string> Strings;
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PowerPCAsmPrinter(std::ostream &O, TargetMachine &TM)
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: AsmPrinter(O, TM), LabelNumber(0) {}
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/// Unique incrementer for label values for referencing Global values.
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///
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unsigned LabelNumber;
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virtual const char *getPassName() const {
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return "PowerPC Assembly Printer";
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}
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PowerPCTargetMachine &getTM() {
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return static_cast<PowerPCTargetMachine&>(TM);
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}
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/// printInstruction - This method is automatically generated by tablegen
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/// from the instruction set description. This method returns true if the
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/// machine instruction was sufficiently described to print it, otherwise it
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/// returns false.
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bool printInstruction(const MachineInstr *MI);
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void printMachineInstruction(const MachineInstr *MI);
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void printOp(const MachineOperand &MO, bool IsCallOp = false);
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void printOperand(const MachineInstr *MI, unsigned OpNo, MVT::ValueType VT){
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const MachineOperand &MO = MI->getOperand(OpNo);
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if (MO.getType() == MachineOperand::MO_MachineRegister) {
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assert(MRegisterInfo::isPhysicalRegister(MO.getReg())&&"Not physreg??");
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O << LowercaseString(TM.getRegisterInfo()->get(MO.getReg()).Name);
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} else if (MO.isImmediate()) {
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O << MO.getImmedValue();
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} else {
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printOp(MO);
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}
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}
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void printU5ImmOperand(const MachineInstr *MI, unsigned OpNo,
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MVT::ValueType VT) {
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unsigned char value = MI->getOperand(OpNo).getImmedValue();
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assert(value <= 31 && "Invalid u5imm argument!");
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O << (unsigned int)value;
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}
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void printU6ImmOperand(const MachineInstr *MI, unsigned OpNo,
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MVT::ValueType VT) {
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unsigned char value = MI->getOperand(OpNo).getImmedValue();
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assert(value <= 63 && "Invalid u6imm argument!");
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O << (unsigned int)value;
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}
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void printS16ImmOperand(const MachineInstr *MI, unsigned OpNo,
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MVT::ValueType VT) {
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O << (short)MI->getOperand(OpNo).getImmedValue();
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}
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void printU16ImmOperand(const MachineInstr *MI, unsigned OpNo,
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MVT::ValueType VT) {
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O << (unsigned short)MI->getOperand(OpNo).getImmedValue();
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}
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void printBranchOperand(const MachineInstr *MI, unsigned OpNo,
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MVT::ValueType VT) {
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// Branches can take an immediate operand. This is used by the branch
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// selection pass to print $+8, an eight byte displacement from the PC.
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if (MI->getOperand(OpNo).isImmediate()) {
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O << "$+" << MI->getOperand(OpNo).getImmedValue() << '\n';
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} else {
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printOp(MI->getOperand(OpNo),
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TM.getInstrInfo()->isCall(MI->getOpcode()));
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}
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}
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void printPICLabel(const MachineInstr *MI, unsigned OpNo,
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MVT::ValueType VT) {
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// FIXME: should probably be converted to cout.width and cout.fill
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O << "\"L0000" << LabelNumber << "$pb\"\n";
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O << "\"L0000" << LabelNumber << "$pb\":";
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}
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void printSymbolHi(const MachineInstr *MI, unsigned OpNo,
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MVT::ValueType VT) {
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O << "ha16(";
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printOp(MI->getOperand(OpNo));
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O << "-\"L0000" << LabelNumber << "$pb\")";
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}
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void printSymbolLo(const MachineInstr *MI, unsigned OpNo,
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MVT::ValueType VT) {
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// FIXME: Because LFS, LFD, and LWZ can be used either with a s16imm or
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// a lo16 of a global or constant pool operand, we must handle both here.
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// this isn't a great design, but it works for now.
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if (MI->getOperand(OpNo).isImmediate()) {
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O << (short)MI->getOperand(OpNo).getImmedValue();
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} else {
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O << "lo16(";
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printOp(MI->getOperand(OpNo));
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O << "-\"L0000" << LabelNumber << "$pb\")";
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}
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}
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virtual void printConstantPool(MachineConstantPool *MCP) = 0;
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virtual bool runOnMachineFunction(MachineFunction &F) = 0;
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virtual bool doFinalization(Module &M) = 0;
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};
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/// DarwinAsmPrinter - PowerPC assembly printer, customized for Darwin/Mac OS
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/// X
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///
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struct DarwinAsmPrinter : public PowerPCAsmPrinter {
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DarwinAsmPrinter(std::ostream &O, TargetMachine &TM)
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: PowerPCAsmPrinter(O, TM) {
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CommentString = ";";
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GlobalPrefix = "_";
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ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
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Data64bitsDirective = 0; // we can't emit a 64-bit unit
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AlignmentIsInBytes = false; // Alignment is by power of 2.
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}
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virtual const char *getPassName() const {
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return "Darwin PPC Assembly Printer";
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}
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void printConstantPool(MachineConstantPool *MCP);
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bool runOnMachineFunction(MachineFunction &F);
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bool doFinalization(Module &M);
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};
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/// AIXAsmPrinter - PowerPC assembly printer, customized for AIX
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///
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struct AIXAsmPrinter : public PowerPCAsmPrinter {
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/// Map for labels corresponding to global variables
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///
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std::map<const GlobalVariable*,std::string> GVToLabelMap;
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AIXAsmPrinter(std::ostream &O, TargetMachine &TM)
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: PowerPCAsmPrinter(O, TM) {
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CommentString = "#";
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GlobalPrefix = "_";
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ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
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Data64bitsDirective = 0; // we can't emit a 64-bit unit
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AlignmentIsInBytes = false; // Alignment is by power of 2.
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}
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virtual const char *getPassName() const {
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return "AIX PPC Assembly Printer";
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}
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void printConstantPool(MachineConstantPool *MCP);
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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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// SwitchSection - Switch to the specified section of the executable if we are
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// not already in it!
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//
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static void SwitchSection(std::ostream &OS, std::string &CurSection,
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const char *NewSection) {
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if (CurSection != NewSection) {
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CurSection = NewSection;
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if (!CurSection.empty())
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OS << "\t" << NewSection << "\n";
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}
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}
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/// isStringCompatible - Can we treat the specified array as a string?
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/// Only if it is an array of ubytes or non-negative sbytes.
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///
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static bool isStringCompatible(const ConstantArray *CVA) {
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const Type *ETy = cast<ArrayType>(CVA->getType())->getElementType();
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if (ETy == Type::UByteTy) return true;
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if (ETy != Type::SByteTy) return false;
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for (unsigned i = 0; i < CVA->getNumOperands(); ++i)
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if (cast<ConstantSInt>(CVA->getOperand(i))->getValue() < 0)
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return false;
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return true;
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}
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/// toOctal - Convert the low order bits of X into an octal digit.
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///
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static inline char toOctal(int X) {
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return (X&7)+'0';
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}
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// Possible states while outputting ASCII strings
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namespace {
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enum StringSection {
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None,
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Alpha,
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Numeric
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};
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}
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/// SwitchStringSection - manage the changes required to output bytes as
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/// characters in a string vs. numeric decimal values
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///
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static inline void SwitchStringSection(std::ostream &O, StringSection NewSect,
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StringSection &Current) {
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if (Current == None) {
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if (NewSect == Alpha)
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O << "\t.byte \"";
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else if (NewSect == Numeric)
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O << "\t.byte ";
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} else if (Current == Alpha) {
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if (NewSect == None)
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O << "\"";
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else if (NewSect == Numeric)
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O << "\"\n"
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<< "\t.byte ";
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} else if (Current == Numeric) {
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if (NewSect == Alpha)
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O << '\n'
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<< "\t.byte \"";
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else if (NewSect == Numeric)
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O << ", ";
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}
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Current = NewSect;
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}
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/// getAsCString - Return the specified array as a C compatible
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/// string, only if the predicate isStringCompatible is true.
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///
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static void printAsCString(std::ostream &O, const ConstantArray *CVA) {
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assert(isStringCompatible(CVA) && "Array is not string compatible!");
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if (CVA->getNumOperands() == 0)
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return;
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StringSection Current = None;
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for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i) {
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unsigned char C = cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
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if (C == '"') {
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SwitchStringSection(O, Alpha, Current);
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O << "\"\"";
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} else if (isprint(C)) {
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SwitchStringSection(O, Alpha, Current);
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O << C;
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} else {
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SwitchStringSection(O, Numeric, Current);
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O << utostr((unsigned)C);
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}
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}
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SwitchStringSection(O, None, Current);
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O << '\n';
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}
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/// createDarwinAsmPrinterPass - Returns a pass that prints the PPC assembly
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/// code for a MachineFunction to the given output stream, in a format that the
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/// Darwin assembler can deal with.
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///
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FunctionPass *llvm::createDarwinAsmPrinter(std::ostream &o, TargetMachine &tm) {
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return new DarwinAsmPrinter(o, tm);
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}
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/// createAIXAsmPrinterPass - Returns a pass that prints the PPC assembly code
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/// for a MachineFunction to the given output stream, in a format that the
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/// AIX 5L assembler can deal with.
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///
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FunctionPass *llvm::createAIXAsmPrinter(std::ostream &o, TargetMachine &tm) {
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return new AIXAsmPrinter(o, tm);
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}
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// Include the auto-generated portion of the assembly writer
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#include "PowerPCGenAsmWriter.inc"
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void PowerPCAsmPrinter::printOp(const MachineOperand &MO, bool IsCallOp) {
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const MRegisterInfo &RI = *TM.getRegisterInfo();
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int new_symbol;
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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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return;
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}
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// FALLTHROUGH
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case MachineOperand::MO_MachineRegister:
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case MachineOperand::MO_CCRegister:
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O << LowercaseString(RI.get(MO.getReg()).Name);
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return;
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case MachineOperand::MO_SignExtendedImmed:
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case MachineOperand::MO_UnextendedImmed:
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std::cerr << "printOp() does not handle immediate values\n";
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abort();
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return;
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case MachineOperand::MO_PCRelativeDisp:
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std::cerr << "Shouldn't use addPCDisp() when building PPC MachineInstrs";
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abort();
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return;
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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_ConstantPoolIndex:
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O << ".CPI" << CurrentFnName << "_" << MO.getConstantPoolIndex();
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return;
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case MachineOperand::MO_ExternalSymbol:
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O << MO.getSymbolName();
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return;
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case MachineOperand::MO_GlobalAddress: {
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GlobalValue *GV = MO.getGlobal();
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std::string Name = Mang->getValueName(GV);
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// Dynamically-resolved functions need a stub for the function. Be
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// wary however not to output $stub for external functions whose addresses
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// are taken. Those should be emitted as $non_lazy_ptr below.
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Function *F = dyn_cast<Function>(GV);
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if (F && IsCallOp && F->isExternal()) {
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FnStubs.insert(Name);
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O << "L" << Name << "$stub";
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return;
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}
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// External or weakly linked global variables need non-lazily-resolved stubs
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if ((GV->isExternal() || GV->hasWeakLinkage() || GV->hasLinkOnceLinkage())){
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if (GV->hasLinkOnceLinkage())
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LinkOnceStubs.insert(Name);
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else
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GVStubs.insert(Name);
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O << "L" << Name << "$non_lazy_ptr";
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return;
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}
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O << Mang->getValueName(GV);
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return;
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}
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default:
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O << "<unknown operand type: " << MO.getType() << ">";
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return;
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}
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}
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/// printMachineInstruction -- Print out a single PowerPC MI in Darwin syntax to
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/// the current output stream.
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///
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void PowerPCAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
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++EmittedInsts;
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if (printInstruction(MI))
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return; // Printer was automatically generated
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assert(0 && "Unhandled instruction in asm writer!");
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abort();
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return;
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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 DarwinAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
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setupMachineFunction(MF);
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O << "\n\n";
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// Print out constants referenced by the function
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printConstantPool(MF.getConstantPool());
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// Print out labels for the function.
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O << "\t.text\n";
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emitAlignment(2);
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O << "\t.globl\t" << CurrentFnName << "\n";
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O << CurrentFnName << ":\n";
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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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O << ".LBB" << CurrentFnName << "_" << I->getNumber() << ":\t"
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<< CommentString << " " << 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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printMachineInstruction(II);
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}
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}
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++LabelNumber;
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// We didn't modify anything.
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return false;
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}
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/// printConstantPool - Print to the current output stream assembly
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/// representations of the constants in the constant pool MCP. This is
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/// used to print out constants which have been "spilled to memory" by
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/// the code generator.
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///
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void DarwinAsmPrinter::printConstantPool(MachineConstantPool *MCP) {
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const std::vector<Constant*> &CP = MCP->getConstants();
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const TargetData &TD = TM.getTargetData();
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if (CP.empty()) return;
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for (unsigned i = 0, e = CP.size(); i != e; ++i) {
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O << "\t.const\n";
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emitAlignment(TD.getTypeAlignmentShift(CP[i]->getType()));
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O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t" << CommentString
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<< *CP[i] << "\n";
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emitGlobalConstant(CP[i]);
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}
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}
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bool DarwinAsmPrinter::doFinalization(Module &M) {
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const TargetData &TD = TM.getTargetData();
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std::string CurSection;
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// Print out module-level global variables here.
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for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
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if (I->hasInitializer()) { // External global require no code
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O << '\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.getTypeAlignmentShift(C->getType());
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if (C->isNullValue() && /* FIXME: Verify correct */
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(I->hasInternalLinkage() || I->hasWeakLinkage() ||
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I->hasLinkOnceLinkage())) {
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SwitchSection(O, CurSection, ".data");
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if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
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if (I->hasInternalLinkage())
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O << ".lcomm " << name << "," << Size << "," << Align;
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else
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O << ".comm " << name << "," << Size;
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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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O << ".section __TEXT,__textcoal_nt,coalesced,no_toc\n"
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<< ".weak_definition " << name << '\n'
|
|
<< ".private_extern " << name << '\n'
|
|
<< ".section __DATA,__datacoal_nt,coalesced,no_toc\n";
|
|
LinkOnceStubs.insert(name);
|
|
break;
|
|
case GlobalValue::WeakLinkage: // FIXME: Verify correct for weak.
|
|
// Nonnull linkonce -> weak
|
|
O << "\t.weak " << name << "\n";
|
|
SwitchSection(O, CurSection, "");
|
|
O << "\t.section\t.llvm.linkonce.d." << name << ",\"aw\",@progbits\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 << "\t.globl " << name << "\n";
|
|
// FALL THROUGH
|
|
case GlobalValue::InternalLinkage:
|
|
SwitchSection(O, CurSection, ".data");
|
|
break;
|
|
case GlobalValue::GhostLinkage:
|
|
std::cerr << "Error: unmaterialized (GhostLinkage) function in asm!";
|
|
abort();
|
|
}
|
|
|
|
emitAlignment(Align);
|
|
O << name << ":\t\t\t\t; ";
|
|
WriteAsOperand(O, I, true, true, &M);
|
|
O << " = ";
|
|
WriteAsOperand(O, C, false, false, &M);
|
|
O << "\n";
|
|
emitGlobalConstant(C);
|
|
}
|
|
}
|
|
|
|
// Output stubs for dynamically-linked functions
|
|
for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
|
|
i != e; ++i)
|
|
{
|
|
O << ".data\n";
|
|
O << ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32\n";
|
|
emitAlignment(2);
|
|
O << "L" << *i << "$stub:\n";
|
|
O << "\t.indirect_symbol " << *i << "\n";
|
|
O << "\tmflr r0\n";
|
|
O << "\tbcl 20,31,L0$" << *i << "\n";
|
|
O << "L0$" << *i << ":\n";
|
|
O << "\tmflr r11\n";
|
|
O << "\taddis r11,r11,ha16(L" << *i << "$lazy_ptr-L0$" << *i << ")\n";
|
|
O << "\tmtlr r0\n";
|
|
O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr-L0$" << *i << ")(r11)\n";
|
|
O << "\tmtctr r12\n";
|
|
O << "\tbctr\n";
|
|
O << ".data\n";
|
|
O << ".lazy_symbol_pointer\n";
|
|
O << "L" << *i << "$lazy_ptr:\n";
|
|
O << "\t.indirect_symbol " << *i << "\n";
|
|
O << "\t.long dyld_stub_binding_helper\n";
|
|
}
|
|
|
|
O << "\n";
|
|
|
|
// Output stubs for external global variables
|
|
if (GVStubs.begin() != GVStubs.end())
|
|
O << ".data\n.non_lazy_symbol_pointer\n";
|
|
for (std::set<std::string>::iterator i = GVStubs.begin(), e = GVStubs.end();
|
|
i != e; ++i) {
|
|
O << "L" << *i << "$non_lazy_ptr:\n";
|
|
O << "\t.indirect_symbol " << *i << "\n";
|
|
O << "\t.long\t0\n";
|
|
}
|
|
|
|
// Output stubs for link-once variables
|
|
if (LinkOnceStubs.begin() != LinkOnceStubs.end())
|
|
O << ".data\n.align 2\n";
|
|
for (std::set<std::string>::iterator i = LinkOnceStubs.begin(),
|
|
e = LinkOnceStubs.end(); i != e; ++i) {
|
|
O << "L" << *i << "$non_lazy_ptr:\n"
|
|
<< "\t.long\t" << *i << '\n';
|
|
}
|
|
|
|
AsmPrinter::doFinalization(M);
|
|
return false; // success
|
|
}
|
|
|
|
/// runOnMachineFunction - This uses the printMachineInstruction()
|
|
/// method to print assembly for each instruction.
|
|
///
|
|
bool AIXAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
|
|
CurrentFnName = MF.getFunction()->getName();
|
|
|
|
// Print out constants referenced by the function
|
|
printConstantPool(MF.getConstantPool());
|
|
|
|
// Print out header for the function.
|
|
O << "\t.csect .text[PR]\n"
|
|
<< "\t.align 2\n"
|
|
<< "\t.globl " << CurrentFnName << '\n'
|
|
<< "\t.globl ." << CurrentFnName << '\n'
|
|
<< "\t.csect " << CurrentFnName << "[DS],3\n"
|
|
<< CurrentFnName << ":\n"
|
|
<< "\t.llong ." << CurrentFnName << ", TOC[tc0], 0\n"
|
|
<< "\t.csect .text[PR]\n"
|
|
<< '.' << CurrentFnName << ":\n";
|
|
|
|
// 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.
|
|
O << "LBB" << CurrentFnName << "_" << I->getNumber() << ":\t# "
|
|
<< I->getBasicBlock()->getName() << "\n";
|
|
for (MachineBasicBlock::const_iterator II = I->begin(), E = I->end();
|
|
II != E; ++II) {
|
|
// Print the assembly for the instruction.
|
|
O << "\t";
|
|
printMachineInstruction(II);
|
|
}
|
|
}
|
|
++LabelNumber;
|
|
|
|
O << "LT.." << CurrentFnName << ":\n"
|
|
<< "\t.long 0\n"
|
|
<< "\t.byte 0,0,32,65,128,0,0,0\n"
|
|
<< "\t.long LT.." << CurrentFnName << "-." << CurrentFnName << '\n'
|
|
<< "\t.short 3\n"
|
|
<< "\t.byte \"" << CurrentFnName << "\"\n"
|
|
<< "\t.align 2\n";
|
|
|
|
// We didn't modify anything.
|
|
return false;
|
|
}
|
|
|
|
/// printConstantPool - Print to the current output stream assembly
|
|
/// representations of the constants in the constant pool MCP. This is
|
|
/// used to print out constants which have been "spilled to memory" by
|
|
/// the code generator.
|
|
///
|
|
void AIXAsmPrinter::printConstantPool(MachineConstantPool *MCP) {
|
|
const std::vector<Constant*> &CP = MCP->getConstants();
|
|
const TargetData &TD = TM.getTargetData();
|
|
|
|
if (CP.empty()) return;
|
|
|
|
for (unsigned i = 0, e = CP.size(); i != e; ++i) {
|
|
O << "\t.const\n";
|
|
O << "\t.align " << (unsigned)TD.getTypeAlignment(CP[i]->getType())
|
|
<< "\n";
|
|
O << ".CPI" << CurrentFnName << "_" << i << ":\t\t\t\t\t;"
|
|
<< *CP[i] << "\n";
|
|
emitGlobalConstant(CP[i]);
|
|
}
|
|
}
|
|
|
|
bool AIXAsmPrinter::doInitialization(Module &M) {
|
|
const TargetData &TD = TM.getTargetData();
|
|
std::string CurSection;
|
|
|
|
O << "\t.machine \"ppc64\"\n"
|
|
<< "\t.toc\n"
|
|
<< "\t.csect .text[PR]\n";
|
|
|
|
// Print out module-level global variables
|
|
for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I) {
|
|
if (!I->hasInitializer())
|
|
continue;
|
|
|
|
std::string Name = I->getName();
|
|
Constant *C = I->getInitializer();
|
|
// N.B.: We are defaulting to writable strings
|
|
if (I->hasExternalLinkage()) {
|
|
O << "\t.globl " << Name << '\n'
|
|
<< "\t.csect .data[RW],3\n";
|
|
} else {
|
|
O << "\t.csect _global.rw_c[RW],3\n";
|
|
}
|
|
O << Name << ":\n";
|
|
emitGlobalConstant(C);
|
|
}
|
|
|
|
// Output labels for globals
|
|
if (M.gbegin() != M.gend()) O << "\t.toc\n";
|
|
for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I) {
|
|
const GlobalVariable *GV = I;
|
|
// Do not output labels for unused variables
|
|
if (GV->isExternal() && GV->use_begin() == GV->use_end())
|
|
continue;
|
|
|
|
std::string Name = GV->getName();
|
|
std::string Label = "LC.." + utostr(LabelNumber++);
|
|
GVToLabelMap[GV] = Label;
|
|
O << Label << ":\n"
|
|
<< "\t.tc " << Name << "[TC]," << Name;
|
|
if (GV->isExternal()) O << "[RW]";
|
|
O << '\n';
|
|
}
|
|
|
|
Mang = new Mangler(M, ".");
|
|
return false; // success
|
|
}
|
|
|
|
bool AIXAsmPrinter::doFinalization(Module &M) {
|
|
const TargetData &TD = TM.getTargetData();
|
|
// Print out module-level global variables
|
|
for (Module::const_giterator I = M.gbegin(), E = M.gend(); I != E; ++I) {
|
|
if (I->hasInitializer() || I->hasExternalLinkage())
|
|
continue;
|
|
|
|
std::string Name = I->getName();
|
|
if (I->hasInternalLinkage()) {
|
|
O << "\t.lcomm " << Name << ",16,_global.bss_c";
|
|
} else {
|
|
O << "\t.comm " << Name << "," << TD.getTypeSize(I->getType())
|
|
<< "," << log2((unsigned)TD.getTypeAlignment(I->getType()));
|
|
}
|
|
O << "\t\t# ";
|
|
WriteAsOperand(O, I, true, true, &M);
|
|
O << "\n";
|
|
}
|
|
|
|
O << "_section_.text:\n"
|
|
<< "\t.csect .data[RW],3\n"
|
|
<< "\t.llong _section_.text\n";
|
|
|
|
delete Mang;
|
|
return false; // success
|
|
}
|