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https://github.com/c64scene-ar/llvm-6502.git
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1d09d56fe1
This adds the actual lib/Target/SystemZ target files necessary to implement the SystemZ target. Note that at this point, the target cannot yet be built since the configure bits are missing. Those will be provided shortly by a follow-on patch. This version of the patch incorporates feedback from reviews by Chris Lattner and Anton Korobeynikov. Thanks to all reviewers! Patch by Richard Sandiford. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181203 91177308-0d34-0410-b5e6-96231b3b80d8
114 lines
4.1 KiB
C++
114 lines
4.1 KiB
C++
//===-- SystemZAsmPrinter.cpp - SystemZ LLVM assembly printer -------------===//
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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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// Streams SystemZ assembly language and associated data, in the form of
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// MCInsts and MCExprs respectively.
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//
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//===----------------------------------------------------------------------===//
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#include "SystemZAsmPrinter.h"
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#include "InstPrinter/SystemZInstPrinter.h"
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#include "SystemZConstantPoolValue.h"
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#include "SystemZMCInstLower.h"
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#include "llvm/CodeGen/MachineModuleInfoImpls.h"
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#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Target/Mangler.h"
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using namespace llvm;
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void SystemZAsmPrinter::EmitInstruction(const MachineInstr *MI) {
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SystemZMCInstLower Lower(Mang, MF->getContext(), *this);
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MCInst LoweredMI;
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Lower.lower(MI, LoweredMI);
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OutStreamer.EmitInstruction(LoweredMI);
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}
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// Convert a SystemZ-specific constant pool modifier into the associated
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// MCSymbolRefExpr variant kind.
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static MCSymbolRefExpr::VariantKind
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getModifierVariantKind(SystemZCP::SystemZCPModifier Modifier) {
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switch (Modifier) {
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case SystemZCP::NTPOFF: return MCSymbolRefExpr::VK_NTPOFF;
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}
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llvm_unreachable("Invalid SystemCPModifier!");
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}
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void SystemZAsmPrinter::
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EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
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SystemZConstantPoolValue *ZCPV =
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static_cast<SystemZConstantPoolValue*>(MCPV);
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const MCExpr *Expr =
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MCSymbolRefExpr::Create(Mang->getSymbol(ZCPV->getGlobalValue()),
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getModifierVariantKind(ZCPV->getModifier()),
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OutContext);
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uint64_t Size = TM.getDataLayout()->getTypeAllocSize(ZCPV->getType());
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OutStreamer.EmitValue(Expr, Size);
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}
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bool SystemZAsmPrinter::PrintAsmOperand(const MachineInstr *MI,
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unsigned OpNo,
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unsigned AsmVariant,
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const char *ExtraCode,
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raw_ostream &OS) {
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if (ExtraCode && *ExtraCode == 'n') {
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if (!MI->getOperand(OpNo).isImm())
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return true;
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OS << -int64_t(MI->getOperand(OpNo).getImm());
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} else {
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SystemZMCInstLower Lower(Mang, MF->getContext(), *this);
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MCOperand MO(Lower.lowerOperand(MI->getOperand(OpNo)));
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SystemZInstPrinter::printOperand(MO, OS);
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}
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return false;
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}
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bool SystemZAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
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unsigned OpNo,
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unsigned AsmVariant,
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const char *ExtraCode,
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raw_ostream &OS) {
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SystemZInstPrinter::printAddress(MI->getOperand(OpNo).getReg(),
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MI->getOperand(OpNo + 1).getImm(),
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MI->getOperand(OpNo + 2).getReg(), OS);
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return false;
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}
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void SystemZAsmPrinter::EmitEndOfAsmFile(Module &M) {
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if (Subtarget->isTargetELF()) {
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const TargetLoweringObjectFileELF &TLOFELF =
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static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
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MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
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// Output stubs for external and common global variables.
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MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
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if (!Stubs.empty()) {
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OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
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const DataLayout *TD = TM.getDataLayout();
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for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
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OutStreamer.EmitLabel(Stubs[i].first);
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OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(),
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TD->getPointerSize(0), 0);
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}
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Stubs.clear();
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}
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}
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}
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// Force static initialization.
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extern "C" void LLVMInitializeSystemZAsmPrinter() {
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RegisterAsmPrinter<SystemZAsmPrinter> X(TheSystemZTarget);
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}
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