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391c5d231a
an argument to every operand printing function. Requires some slight tweaks to x86, the only user. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24541 91177308-0d34-0410-b5e6-96231b3b80d8
668 lines
22 KiB
C++
668 lines
22 KiB
C++
//===-- PPCAsmPrinter.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 "PPC.h"
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#include "PPCTargetMachine.h"
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#include "PPCSubtarget.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/MachineInstr.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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class PPCAsmPrinter : public AsmPrinter {
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public:
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std::set<std::string> FnStubs, GVStubs, LinkOnceStubs;
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PPCAsmPrinter(std::ostream &O, TargetMachine &TM)
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: AsmPrinter(O, TM) {}
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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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PPCTargetMachine &getTM() {
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return static_cast<PPCTargetMachine&>(TM);
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}
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unsigned enumRegToMachineReg(unsigned enumReg) {
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switch (enumReg) {
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default: assert(0 && "Unhandled register!"); break;
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case PPC::CR0: return 0;
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case PPC::CR1: return 1;
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case PPC::CR2: return 2;
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case PPC::CR3: return 3;
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case PPC::CR4: return 4;
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case PPC::CR5: return 5;
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case PPC::CR6: return 6;
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case PPC::CR7: return 7;
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}
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abort();
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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);
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void printOperand(const MachineInstr *MI, unsigned OpNo){
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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 << 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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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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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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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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O << (unsigned short)MI->getOperand(OpNo).getImmedValue();
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}
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void printS16X4ImmOperand(const MachineInstr *MI, unsigned OpNo) {
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O << (short)MI->getOperand(OpNo).getImmedValue()*4;
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}
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void printBranchOperand(const MachineInstr *MI, unsigned OpNo) {
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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();
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} else {
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printOp(MI->getOperand(OpNo));
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}
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}
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void printCallOperand(const MachineInstr *MI, unsigned OpNo) {
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const MachineOperand &MO = MI->getOperand(OpNo);
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if (!PPCGenerateStaticCode) {
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if (MO.getType() == MachineOperand::MO_ExternalSymbol) {
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std::string Name(GlobalPrefix); Name += MO.getSymbolName();
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FnStubs.insert(Name);
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O << "L" << Name << "$stub";
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return;
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} else if (MO.getType() == MachineOperand::MO_GlobalAddress &&
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isa<Function>(MO.getGlobal()) &&
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cast<Function>(MO.getGlobal())->isExternal()) {
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// Dynamically-resolved functions need a stub for the function.
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std::string Name = Mang->getValueName(MO.getGlobal());
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FnStubs.insert(Name);
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O << "L" << Name << "$stub";
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return;
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}
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}
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printOp(MI->getOperand(OpNo));
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}
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void printAbsAddrOperand(const MachineInstr *MI, unsigned OpNo) {
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O << (int)MI->getOperand(OpNo).getImmedValue()*4;
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}
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void printPICLabel(const MachineInstr *MI, unsigned OpNo) {
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// FIXME: should probably be converted to cout.width and cout.fill
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O << "\"L0000" << getFunctionNumber() << "$pb\"\n";
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O << "\"L0000" << getFunctionNumber() << "$pb\":";
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}
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void printSymbolHi(const MachineInstr *MI, unsigned OpNo) {
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if (MI->getOperand(OpNo).isImmediate()) {
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printS16ImmOperand(MI, OpNo);
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} else {
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O << "ha16(";
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printOp(MI->getOperand(OpNo));
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if (PICEnabled)
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O << "-\"L0000" << getFunctionNumber() << "$pb\")";
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else
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O << ')';
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}
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}
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void printSymbolLo(const MachineInstr *MI, unsigned OpNo) {
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if (MI->getOperand(OpNo).isImmediate()) {
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printS16ImmOperand(MI, OpNo);
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} else {
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O << "lo16(";
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printOp(MI->getOperand(OpNo));
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if (PICEnabled)
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O << "-\"L0000" << getFunctionNumber() << "$pb\")";
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else
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O << ')';
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}
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}
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void printcrbitm(const MachineInstr *MI, unsigned OpNo) {
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unsigned CCReg = MI->getOperand(OpNo).getReg();
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unsigned RegNo = enumRegToMachineReg(CCReg);
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O << (0x80 >> RegNo);
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}
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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 PPCAsmPrinter {
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DarwinAsmPrinter(std::ostream &O, TargetMachine &TM)
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: PPCAsmPrinter(O, TM) {
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CommentString = ";";
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GlobalPrefix = "_";
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PrivateGlobalPrefix = "L"; // Marker for constant pool idxs
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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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ConstantPoolSection = "\t.const\t";
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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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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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/// AIXAsmPrinter - PowerPC assembly printer, customized for AIX
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///
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struct AIXAsmPrinter : public PPCAsmPrinter {
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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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: PPCAsmPrinter(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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ConstantPoolSection = "\t.const\t";
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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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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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/// 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 "PPCGenAsmWriter.inc"
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void PPCAsmPrinter::printOp(const MachineOperand &MO) {
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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 << 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 << PrivateGlobalPrefix << "BB" << getFunctionNumber() << "_"
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<< MBBOp->getNumber() << "\t; " << 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 << PrivateGlobalPrefix << "CPI" << getFunctionNumber()
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<< '_' << MO.getConstantPoolIndex();
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return;
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case MachineOperand::MO_ExternalSymbol:
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O << GlobalPrefix << 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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// External or weakly linked global variables need non-lazily-resolved stubs
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if (!PPCGenerateStaticCode &&
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((GV->isExternal() || GV->hasWeakLinkage() ||
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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 << Name;
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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 PPCAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
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++EmittedInsts;
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// Check for slwi/srwi mnemonics.
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if (MI->getOpcode() == PPC::RLWINM) {
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bool FoundMnemonic = false;
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unsigned char SH = MI->getOperand(2).getImmedValue();
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unsigned char MB = MI->getOperand(3).getImmedValue();
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unsigned char ME = MI->getOperand(4).getImmedValue();
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if (SH <= 31 && MB == 0 && ME == (31-SH)) {
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O << "slwi "; FoundMnemonic = true;
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}
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if (SH <= 31 && MB == (32-SH) && ME == 31) {
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O << "srwi "; FoundMnemonic = true;
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SH = 32-SH;
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}
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if (FoundMnemonic) {
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printOperand(MI, 0);
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O << ", ";
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printOperand(MI, 1);
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O << ", " << (unsigned int)SH << "\n";
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return;
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}
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}
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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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EmitConstantPool(MF.getConstantPool());
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// Print out labels for the function.
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const Function *F = MF.getFunction();
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SwitchSection(".text", F);
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EmitAlignment(4, F);
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if (!F->hasInternalLinkage())
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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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if (I != MF.begin()) {
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O << PrivateGlobalPrefix << "BB" << getFunctionNumber() << '_'
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<< I->getNumber() << ":\t";
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if (!I->getBasicBlock()->getName().empty())
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O << CommentString << " " << I->getBasicBlock()->getName();
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O << "\n";
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}
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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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// We didn't modify anything.
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return false;
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}
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bool DarwinAsmPrinter::doInitialization(Module &M) {
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if (TM.getSubtarget<PPCSubtarget>().isGigaProcessor())
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O << "\t.machine ppc970\n";
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AsmPrinter::doInitialization(M);
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// Darwin wants symbols to be quoted if they have complex names.
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Mang->setUseQuotes(true);
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return false;
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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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// Print out module-level global variables here.
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for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
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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(".data", I);
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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; '" << I->getName() << "'\n";
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} else {
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switch (I->getLinkage()) {
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case GlobalValue::LinkOnceLinkage:
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SwitchSection("", 0);
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O << ".section __TEXT,__textcoal_nt,coalesced,no_toc\n"
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<< ".weak_definition " << name << '\n'
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<< ".private_extern " << name << '\n'
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<< ".section __DATA,__datacoal_nt,coalesced,no_toc\n";
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LinkOnceStubs.insert(name);
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break;
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case GlobalValue::WeakLinkage:
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O << ".weak_definition " << name << '\n'
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<< ".private_extern " << name << '\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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SwitchSection(".data", I);
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break;
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default:
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std::cerr << "Unknown linkage type!";
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abort();
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}
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EmitAlignment(Align, I);
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O << name << ":\t\t\t\t; '" << I->getName() << "'\n";
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EmitGlobalConstant(C);
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}
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}
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// Output stubs for dynamically-linked functions
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for (std::set<std::string>::iterator i = FnStubs.begin(), e = FnStubs.end();
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i != e; ++i)
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{
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if (PICEnabled) {
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O << ".data\n";
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O << ".section __TEXT,__picsymbolstub1,symbol_stubs,pure_instructions,32\n";
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EmitAlignment(2);
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O << "L" << *i << "$stub:\n";
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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 << "$lazy_ptr:\n";
|
|
O << "\t.indirect_symbol " << *i << "\n";
|
|
O << "\t.long dyld_stub_binding_helper\n";
|
|
} else {
|
|
O << "\t.section __TEXT,__symbol_stub1,symbol_stubs,pure_instructions,16\n";
|
|
EmitAlignment(4);
|
|
O << "L" << *i << "$stub:\n";
|
|
O << "\t.indirect_symbol " << *i << "\n";
|
|
O << "\tlis r11,ha16(L" << *i << "$lazy_ptr)\n";
|
|
O << "\tlwzu r12,lo16(L" << *i << "$lazy_ptr)(r11)\n";
|
|
O << "\tmtctr r12\n";
|
|
O << "\tbctr\n";
|
|
O << "\t.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';
|
|
}
|
|
|
|
// Funny Darwin hack: This flag tells the linker that no global symbols
|
|
// contain code that falls through to other global symbols (e.g. the obvious
|
|
// implementation of multiple entry points). If this doesn't occur, the
|
|
// linker can safely perform dead code stripping. Since LLVM never generates
|
|
// code that does this, it is always safe to set.
|
|
O << "\t.subsections_via_symbols\n";
|
|
|
|
AsmPrinter::doFinalization(M);
|
|
return false; // success
|
|
}
|
|
|
|
/// runOnMachineFunction - This uses the printMachineInstruction()
|
|
/// method to print assembly for each instruction.
|
|
///
|
|
bool AIXAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
|
|
SetupMachineFunction(MF);
|
|
|
|
// Print out constants referenced by the function
|
|
EmitConstantPool(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 << PrivateGlobalPrefix << "BB" << getFunctionNumber() << '_'
|
|
<< I->getNumber()
|
|
<< ":\t" << CommentString << 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);
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
bool AIXAsmPrinter::doInitialization(Module &M) {
|
|
SwitchSection("", 0);
|
|
const TargetData &TD = TM.getTargetData();
|
|
|
|
O << "\t.machine \"ppc64\"\n"
|
|
<< "\t.toc\n"
|
|
<< "\t.csect .text[PR]\n";
|
|
|
|
// Print out module-level global variables
|
|
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
|
|
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.global_begin() != M.global_end()) O << "\t.toc\n";
|
|
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
|
|
I != E; ++I) {
|
|
const GlobalVariable *GV = I;
|
|
// Do not output labels for unused variables
|
|
if (GV->isExternal() && GV->use_begin() == GV->use_end())
|
|
continue;
|
|
|
|
IncrementFunctionNumber();
|
|
std::string Name = GV->getName();
|
|
std::string Label = "LC.." + utostr(getFunctionNumber());
|
|
GVToLabelMap[GV] = Label;
|
|
O << Label << ":\n"
|
|
<< "\t.tc " << Name << "[TC]," << Name;
|
|
if (GV->isExternal()) O << "[RW]";
|
|
O << '\n';
|
|
}
|
|
|
|
AsmPrinter::doInitialization(M);
|
|
return false; // success
|
|
}
|
|
|
|
bool AIXAsmPrinter::doFinalization(Module &M) {
|
|
const TargetData &TD = TM.getTargetData();
|
|
// Print out module-level global variables
|
|
for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
|
|
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_32((unsigned)TD.getTypeAlignment(I->getType()));
|
|
}
|
|
O << "\t\t" << CommentString << " ";
|
|
WriteAsOperand(O, I, false, true, &M);
|
|
O << "\n";
|
|
}
|
|
|
|
O << "_section_.text:\n"
|
|
<< "\t.csect .data[RW],3\n"
|
|
<< "\t.llong _section_.text\n";
|
|
AsmPrinter::doFinalization(M);
|
|
return false; // success
|
|
}
|