2009-07-16 15:27:25 +02:00
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//===-- SystemZAsmPrinter.cpp - SystemZ 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 is distributed under the University of Illinois Open Source
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// 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 the SystemZ assembly language.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "asm-printer"
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#include "SystemZ.h"
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#include "SystemZInstrInfo.h"
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#include "SystemZTargetMachine.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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2009-08-13 03:36:44 +02:00
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#include "llvm/Assembly/Writer.h"
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2009-07-16 15:27:25 +02:00
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/CodeGen/DwarfWriter.h"
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#include "llvm/CodeGen/MachineModuleInfo.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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2009-08-19 07:49:37 +02:00
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#include "llvm/MC/MCStreamer.h"
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2009-08-22 22:48:53 +02:00
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#include "llvm/MC/MCAsmInfo.h"
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2009-09-13 19:14:04 +02:00
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#include "llvm/MC/MCSymbol.h"
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2009-07-16 15:27:25 +02:00
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#include "llvm/Target/TargetData.h"
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2009-07-28 05:13:23 +02:00
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#include "llvm/Target/TargetLoweringObjectFile.h"
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2009-07-16 16:36:52 +02:00
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#include "llvm/Target/TargetRegistry.h"
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2009-07-16 15:27:25 +02:00
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#include "llvm/ADT/Statistic.h"
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#include "llvm/Support/Compiler.h"
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2009-07-16 16:36:52 +02:00
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#include "llvm/Support/FormattedStream.h"
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2009-07-16 15:27:25 +02:00
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#include "llvm/Support/Mangler.h"
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using namespace llvm;
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STATISTIC(EmittedInsts, "Number of machine instrs printed");
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namespace {
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class VISIBILITY_HIDDEN SystemZAsmPrinter : public AsmPrinter {
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public:
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2009-07-16 16:36:52 +02:00
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SystemZAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
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2009-08-22 23:43:10 +02:00
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const MCAsmInfo *MAI, bool V)
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: AsmPrinter(O, TM, MAI, V) {}
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2009-07-16 15:27:25 +02:00
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virtual const char *getPassName() const {
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return "SystemZ Assembly Printer";
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}
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void printOperand(const MachineInstr *MI, int OpNum,
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const char* Modifier = 0);
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2009-07-16 16:16:05 +02:00
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void printPCRelImmOperand(const MachineInstr *MI, int OpNum);
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2009-07-16 15:43:18 +02:00
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void printRIAddrOperand(const MachineInstr *MI, int OpNum,
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const char* Modifier = 0);
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2009-07-16 15:44:00 +02:00
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void printRRIAddrOperand(const MachineInstr *MI, int OpNum,
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const char* Modifier = 0);
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2009-07-16 16:02:45 +02:00
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void printS16ImmOperand(const MachineInstr *MI, int OpNum) {
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O << (int16_t)MI->getOperand(OpNum).getImm();
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}
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void printS32ImmOperand(const MachineInstr *MI, int OpNum) {
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O << (int32_t)MI->getOperand(OpNum).getImm();
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}
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2009-08-08 03:32:19 +02:00
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void printInstruction(const MachineInstr *MI); // autogenerated.
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2009-09-13 22:19:22 +02:00
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static const char *getRegisterName(unsigned RegNo);
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2009-09-13 22:08:00 +02:00
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2009-07-16 15:27:25 +02:00
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void printMachineInstruction(const MachineInstr * MI);
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void emitFunctionHeader(const MachineFunction &MF);
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bool runOnMachineFunction(MachineFunction &F);
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2009-07-21 20:38:57 +02:00
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void PrintGlobalVariable(const GlobalVariable* GVar);
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2009-07-16 15:27:25 +02:00
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void getAnalysisUsage(AnalysisUsage &AU) const {
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AsmPrinter::getAnalysisUsage(AU);
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AU.setPreservesAll();
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}
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};
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} // end of anonymous namespace
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#include "SystemZGenAsmWriter.inc"
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void SystemZAsmPrinter::emitFunctionHeader(const MachineFunction &MF) {
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2009-07-16 16:36:52 +02:00
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unsigned FnAlign = MF.getAlignment();
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2009-07-16 15:27:25 +02:00
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const Function *F = MF.getFunction();
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2009-08-19 07:49:37 +02:00
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OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
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2009-07-16 15:27:25 +02:00
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EmitAlignment(FnAlign, F);
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switch (F->getLinkage()) {
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default: assert(0 && "Unknown linkage type!");
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case Function::InternalLinkage: // Symbols default to internal.
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case Function::PrivateLinkage:
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2009-07-20 03:03:30 +02:00
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case Function::LinkerPrivateLinkage:
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2009-07-16 15:27:25 +02:00
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break;
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case Function::ExternalLinkage:
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O << "\t.globl\t" << CurrentFnName << '\n';
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break;
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case Function::LinkOnceAnyLinkage:
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case Function::LinkOnceODRLinkage:
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case Function::WeakAnyLinkage:
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case Function::WeakODRLinkage:
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O << "\t.weak\t" << CurrentFnName << '\n';
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break;
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}
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printVisibility(CurrentFnName, F->getVisibility());
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O << "\t.type\t" << CurrentFnName << ",@function\n"
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<< CurrentFnName << ":\n";
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}
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bool SystemZAsmPrinter::runOnMachineFunction(MachineFunction &MF) {
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SetupMachineFunction(MF);
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O << "\n\n";
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2009-07-16 16:19:35 +02:00
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// Print out constants referenced by the function
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EmitConstantPool(MF.getConstantPool());
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2009-07-16 15:27:25 +02:00
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// Print the 'header' of function
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emitFunctionHeader(MF);
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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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2009-10-06 19:38:38 +02:00
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EmitBasicBlockStart(I);
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2009-07-16 15:27:25 +02:00
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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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printMachineInstruction(II);
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}
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2009-08-22 23:43:10 +02:00
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if (MAI->hasDotTypeDotSizeDirective())
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2009-07-16 15:27:25 +02:00
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O << "\t.size\t" << CurrentFnName << ", .-" << CurrentFnName << '\n';
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2009-07-16 16:07:50 +02:00
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// Print out jump tables referenced by the function.
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EmitJumpTableInfo(MF.getJumpTableInfo(), MF);
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2009-07-16 15:27:25 +02:00
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// We didn't modify anything
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return false;
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}
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void SystemZAsmPrinter::printMachineInstruction(const MachineInstr *MI) {
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++EmittedInsts;
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2009-10-06 04:19:11 +02:00
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processDebugLoc(MI, true);
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2009-09-10 01:14:36 +02:00
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2009-07-16 15:27:25 +02:00
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// Call the autogenerated instruction printer routines.
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2009-08-08 02:05:42 +02:00
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printInstruction(MI);
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2009-09-10 01:14:36 +02:00
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if (VerboseAsm && !MI->getDebugLoc().isUnknown())
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EmitComments(*MI);
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O << '\n';
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2009-10-06 04:19:11 +02:00
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processDebugLoc(MI, false);
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2009-07-16 15:27:25 +02:00
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}
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2009-09-13 19:14:04 +02:00
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void SystemZAsmPrinter::printPCRelImmOperand(const MachineInstr *MI, int OpNum){
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2009-07-16 16:16:05 +02:00
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const MachineOperand &MO = MI->getOperand(OpNum);
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switch (MO.getType()) {
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2009-07-16 16:17:07 +02:00
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case MachineOperand::MO_Immediate:
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O << MO.getImm();
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return;
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case MachineOperand::MO_MachineBasicBlock:
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2009-09-13 19:14:04 +02:00
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GetMBBSymbol(MO.getMBB()->getNumber())->print(O, MAI);
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2009-07-16 16:17:07 +02:00
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return;
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2009-07-16 16:16:05 +02:00
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case MachineOperand::MO_GlobalAddress: {
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const GlobalValue *GV = MO.getGlobal();
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2009-07-16 16:36:52 +02:00
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std::string Name = Mang->getMangledName(GV);
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2009-07-16 16:16:05 +02:00
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O << Name;
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// Assemble calls via PLT for externally visible symbols if PIC.
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if (TM.getRelocationModel() == Reloc::PIC_ &&
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!GV->hasHiddenVisibility() && !GV->hasProtectedVisibility() &&
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!GV->hasLocalLinkage())
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O << "@PLT";
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printOffset(MO.getOffset());
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return;
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}
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case MachineOperand::MO_ExternalSymbol: {
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2009-08-22 23:43:10 +02:00
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std::string Name(MAI->getGlobalPrefix());
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2009-07-16 16:16:05 +02:00
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Name += MO.getSymbolName();
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O << Name;
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if (TM.getRelocationModel() == Reloc::PIC_)
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O << "@PLT";
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return;
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}
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default:
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assert(0 && "Not implemented yet!");
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}
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}
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2009-07-16 15:27:25 +02:00
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void SystemZAsmPrinter::printOperand(const MachineInstr *MI, int OpNum,
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2009-07-16 15:43:18 +02:00
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const char* Modifier) {
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2009-07-16 15:29:38 +02:00
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const MachineOperand &MO = MI->getOperand(OpNum);
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switch (MO.getType()) {
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2009-07-16 16:04:01 +02:00
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case MachineOperand::MO_Register: {
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2009-07-16 15:29:38 +02:00
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assert (TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
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"Virtual registers should be already mapped!");
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2009-07-16 16:04:01 +02:00
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unsigned Reg = MO.getReg();
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if (Modifier && strncmp(Modifier, "subreg", 6) == 0) {
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if (strncmp(Modifier + 7, "even", 4) == 0)
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Reg = TRI->getSubReg(Reg, SystemZ::SUBREG_EVEN);
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else if (strncmp(Modifier + 7, "odd", 3) == 0)
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Reg = TRI->getSubReg(Reg, SystemZ::SUBREG_ODD);
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else
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assert(0 && "Invalid subreg modifier");
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}
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2009-09-13 22:31:40 +02:00
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O << '%' << getRegisterName(Reg);
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2009-07-16 15:29:38 +02:00
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return;
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2009-07-16 16:04:01 +02:00
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}
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2009-07-16 15:29:38 +02:00
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case MachineOperand::MO_Immediate:
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2009-07-16 16:01:10 +02:00
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O << MO.getImm();
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2009-07-16 15:29:38 +02:00
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return;
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case MachineOperand::MO_MachineBasicBlock:
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2009-09-13 19:14:04 +02:00
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GetMBBSymbol(MO.getMBB()->getNumber())->print(O, MAI);
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2009-07-16 16:07:50 +02:00
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return;
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case MachineOperand::MO_JumpTableIndex:
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2009-08-22 23:43:10 +02:00
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O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber() << '_'
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2009-07-16 16:07:50 +02:00
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<< MO.getIndex();
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2009-07-16 15:29:38 +02:00
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return;
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2009-07-16 16:19:35 +02:00
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case MachineOperand::MO_ConstantPoolIndex:
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2009-08-22 23:43:10 +02:00
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O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
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2009-07-16 16:19:35 +02:00
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<< MO.getIndex();
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printOffset(MO.getOffset());
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break;
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2009-07-16 15:50:21 +02:00
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case MachineOperand::MO_GlobalAddress: {
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2009-07-16 16:04:22 +02:00
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const GlobalValue *GV = MO.getGlobal();
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2009-07-16 16:36:52 +02:00
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std::string Name = Mang->getMangledName(GV);
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2009-07-16 15:50:21 +02:00
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O << Name;
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2009-07-16 16:16:05 +02:00
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break;
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2009-07-16 15:50:21 +02:00
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}
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case MachineOperand::MO_ExternalSymbol: {
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2009-08-22 23:43:10 +02:00
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std::string Name(MAI->getGlobalPrefix());
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2009-07-16 15:50:21 +02:00
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Name += MO.getSymbolName();
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O << Name;
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2009-07-16 16:16:05 +02:00
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break;
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2009-07-16 15:50:21 +02:00
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}
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2009-07-16 15:29:38 +02:00
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default:
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assert(0 && "Not implemented yet!");
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}
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2009-07-16 16:16:05 +02:00
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switch (MO.getTargetFlags()) {
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default:
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2009-07-18 15:33:17 +02:00
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llvm_unreachable("Unknown target flag on GV operand");
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2009-07-16 16:16:05 +02:00
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case SystemZII::MO_NO_FLAG:
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break;
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case SystemZII::MO_GOTENT: O << "@GOTENT"; break;
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case SystemZII::MO_PLT: O << "@PLT"; break;
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}
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printOffset(MO.getOffset());
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2009-07-16 15:27:25 +02:00
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}
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2009-07-16 15:43:18 +02:00
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void SystemZAsmPrinter::printRIAddrOperand(const MachineInstr *MI, int OpNum,
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const char* Modifier) {
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const MachineOperand &Base = MI->getOperand(OpNum);
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// Print displacement operand.
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printOperand(MI, OpNum+1);
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// Print base operand (if any)
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2009-07-16 15:44:00 +02:00
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if (Base.getReg()) {
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2009-07-16 15:43:18 +02:00
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O << '(';
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printOperand(MI, OpNum);
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O << ')';
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}
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}
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2009-07-16 15:44:00 +02:00
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void SystemZAsmPrinter::printRRIAddrOperand(const MachineInstr *MI, int OpNum,
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const char* Modifier) {
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const MachineOperand &Base = MI->getOperand(OpNum);
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2009-07-16 15:48:42 +02:00
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const MachineOperand &Index = MI->getOperand(OpNum+2);
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2009-07-16 15:44:00 +02:00
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// Print displacement operand.
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2009-07-16 15:48:42 +02:00
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printOperand(MI, OpNum+1);
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2009-07-16 15:44:00 +02:00
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// Print base operand (if any)
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if (Base.getReg()) {
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O << '(';
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printOperand(MI, OpNum);
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if (Index.getReg()) {
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O << ',';
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2009-07-16 15:48:42 +02:00
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printOperand(MI, OpNum+2);
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2009-07-16 15:44:00 +02:00
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}
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O << ')';
|
|
|
|
} else
|
|
|
|
assert(!Index.getReg() && "Should allocate base register first!");
|
|
|
|
}
|
|
|
|
|
2009-07-21 20:38:57 +02:00
|
|
|
void SystemZAsmPrinter::PrintGlobalVariable(const GlobalVariable* GVar) {
|
2009-07-16 16:04:22 +02:00
|
|
|
const TargetData *TD = TM.getTargetData();
|
|
|
|
|
|
|
|
if (!GVar->hasInitializer())
|
|
|
|
return; // External global require no code
|
|
|
|
|
|
|
|
// Check to see if this is a special global used by LLVM, if so, emit it.
|
|
|
|
if (EmitSpecialLLVMGlobal(GVar))
|
|
|
|
return;
|
|
|
|
|
2009-07-16 16:36:52 +02:00
|
|
|
std::string name = Mang->getMangledName(GVar);
|
2009-07-16 16:04:22 +02:00
|
|
|
Constant *C = GVar->getInitializer();
|
2009-07-16 16:36:52 +02:00
|
|
|
unsigned Size = TD->getTypeAllocSize(C->getType());
|
2009-07-16 16:04:22 +02:00
|
|
|
unsigned Align = std::max(1U, TD->getPreferredAlignmentLog(GVar));
|
|
|
|
|
|
|
|
printVisibility(name, GVar->getVisibility());
|
|
|
|
|
|
|
|
O << "\t.type\t" << name << ",@object\n";
|
|
|
|
|
2009-08-19 07:49:37 +02:00
|
|
|
OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(GVar, Mang,
|
|
|
|
TM));
|
2009-07-16 16:04:22 +02:00
|
|
|
|
|
|
|
if (C->isNullValue() && !GVar->hasSection() &&
|
|
|
|
!GVar->isThreadLocal() &&
|
|
|
|
(GVar->hasLocalLinkage() || GVar->isWeakForLinker())) {
|
|
|
|
|
|
|
|
if (Size == 0) Size = 1; // .comm Foo, 0 is undefined, avoid it.
|
|
|
|
|
|
|
|
if (GVar->hasLocalLinkage())
|
|
|
|
O << "\t.local\t" << name << '\n';
|
|
|
|
|
2009-08-22 23:43:10 +02:00
|
|
|
O << MAI->getCOMMDirective() << name << ',' << Size;
|
|
|
|
if (MAI->getCOMMDirectiveTakesAlignment())
|
|
|
|
O << ',' << (MAI->getAlignmentIsInBytes() ? (1 << Align) : Align);
|
2009-07-16 16:04:22 +02:00
|
|
|
|
|
|
|
if (VerboseAsm) {
|
2009-08-22 23:43:10 +02:00
|
|
|
O << "\t\t" << MAI->getCommentString() << ' ';
|
2009-08-13 03:36:44 +02:00
|
|
|
WriteAsOperand(O, GVar, /*PrintType=*/false, GVar->getParent());
|
2009-07-16 16:04:22 +02:00
|
|
|
}
|
|
|
|
O << '\n';
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (GVar->getLinkage()) {
|
|
|
|
case GlobalValue::CommonLinkage:
|
|
|
|
case GlobalValue::LinkOnceAnyLinkage:
|
|
|
|
case GlobalValue::LinkOnceODRLinkage:
|
|
|
|
case GlobalValue::WeakAnyLinkage:
|
|
|
|
case GlobalValue::WeakODRLinkage:
|
|
|
|
O << "\t.weak\t" << name << '\n';
|
|
|
|
break;
|
|
|
|
case GlobalValue::DLLExportLinkage:
|
|
|
|
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::PrivateLinkage:
|
2009-07-20 03:03:30 +02:00
|
|
|
case GlobalValue::LinkerPrivateLinkage:
|
2009-07-16 16:04:22 +02:00
|
|
|
case GlobalValue::InternalLinkage:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
assert(0 && "Unknown linkage type!");
|
|
|
|
}
|
|
|
|
|
|
|
|
// Use 16-bit alignment by default to simplify bunch of stuff
|
|
|
|
EmitAlignment(Align, GVar, 1);
|
|
|
|
O << name << ":";
|
|
|
|
if (VerboseAsm) {
|
2009-08-22 23:43:10 +02:00
|
|
|
O << "\t\t\t\t" << MAI->getCommentString() << ' ';
|
2009-08-13 03:36:44 +02:00
|
|
|
WriteAsOperand(O, GVar, /*PrintType=*/false, GVar->getParent());
|
2009-07-16 16:04:22 +02:00
|
|
|
}
|
|
|
|
O << '\n';
|
2009-08-22 23:43:10 +02:00
|
|
|
if (MAI->hasDotTypeDotSizeDirective())
|
2009-07-16 16:04:22 +02:00
|
|
|
O << "\t.size\t" << name << ", " << Size << '\n';
|
|
|
|
|
|
|
|
EmitGlobalConstant(C);
|
|
|
|
}
|
2009-07-16 16:36:52 +02:00
|
|
|
|
|
|
|
// Force static initialization.
|
|
|
|
extern "C" void LLVMInitializeSystemZAsmPrinter() {
|
2009-07-25 08:49:55 +02:00
|
|
|
RegisterAsmPrinter<SystemZAsmPrinter> X(TheSystemZTarget);
|
2009-07-16 16:36:52 +02:00
|
|
|
}
|