ebcf7f91ff
A HLASM source file must end with the END instruction. It is implemented by adding a new function to the target streamer. This change also turns SystemZHLASMSAsmString.h into a proper header file, and only uses the SystemZTargetHLASMStreamer when HLASM output is generated.
69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
//==-- SystemZTargetStreamer.cpp - SystemZ Target Streamer Methods ----------=//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file defines SystemZ-specific target streamer classes.
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/// These are for implementing support for target-specific assembly directives.
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///
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//===----------------------------------------------------------------------===//
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#include "SystemZTargetStreamer.h"
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#include "SystemZHLASMAsmStreamer.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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using namespace llvm;
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void SystemZTargetStreamer::emitConstantPools() {
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// Emit EXRL target instructions.
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if (EXRLTargets2Sym.empty())
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return;
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// Switch to the .text section.
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const MCObjectFileInfo &OFI = *Streamer.getContext().getObjectFileInfo();
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Streamer.switchSection(OFI.getTextSection());
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for (auto &I : EXRLTargets2Sym) {
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Streamer.emitLabel(I.second);
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const MCInstSTIPair &MCI_STI = I.first;
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Streamer.emitInstruction(MCI_STI.first, *MCI_STI.second);
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}
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EXRLTargets2Sym.clear();
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}
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SystemZHLASMAsmStreamer &SystemZTargetHLASMStreamer::getHLASMStreamer() {
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return static_cast<SystemZHLASMAsmStreamer &>(getStreamer());
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}
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void SystemZTargetHLASMStreamer::emitExtern(StringRef Sym) {
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getStreamer().emitRawText(Twine(" EXTRN ") + Twine(Sym));
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}
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void SystemZTargetHLASMStreamer::emitEnd() { getHLASMStreamer().emitEnd(); }
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// HLASM statements can only perform a single operation at a time
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const MCExpr *SystemZTargetHLASMStreamer::createWordDiffExpr(
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MCContext &Ctx, const MCSymbol *Hi, const MCSymbol *Lo) {
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assert(Hi && Lo && "Symbols required to calculate expression");
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MCSymbol *Temp = Ctx.createTempSymbol();
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OS << Temp->getName() << " EQU ";
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const MCBinaryExpr *TempExpr = MCBinaryExpr::createSub(
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MCSymbolRefExpr::create(Hi, Ctx), MCSymbolRefExpr::create(Lo, Ctx), Ctx);
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Ctx.getAsmInfo()->printExpr(OS, *TempExpr);
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OS << "\n";
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return MCBinaryExpr::createLShr(MCSymbolRefExpr::create(Temp, Ctx),
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MCConstantExpr::create(1, Ctx), Ctx);
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}
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const MCExpr *SystemZTargetGOFFStreamer::createWordDiffExpr(
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MCContext &Ctx, const MCSymbol *Hi, const MCSymbol *Lo) {
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assert(Hi && Lo && "Symbols required to calculate expression");
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return MCBinaryExpr::createLShr(
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MCBinaryExpr::createSub(MCSymbolRefExpr::create(Hi, Ctx),
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MCSymbolRefExpr::create(Lo, Ctx), Ctx),
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MCConstantExpr::create(1, Ctx), Ctx);
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}
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