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a056348a49
Summary: Use TE SMC instead of TC SMC in large code model mode, so that large code model TOC entries could get placed after all the small code model TOC entries, which reduces the chance of TOC overflow. Reviewed By: Xiangling_L Differential Revision: https://reviews.llvm.org/D85455
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//===- lib/MC/MCSectionXCOFF.cpp - XCOFF Code Section Representation ------===//
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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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#include "llvm/MC/MCSectionXCOFF.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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MCSectionXCOFF::~MCSectionXCOFF() = default;
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void MCSectionXCOFF::printCsectDirective(raw_ostream &OS) const {
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OS << "\t.csect " << QualName->getName() << "," << Log2_32(getAlignment())
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<< '\n';
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}
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void MCSectionXCOFF::PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
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raw_ostream &OS,
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const MCExpr *Subsection) const {
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if (getKind().isText()) {
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if (getMappingClass() != XCOFF::XMC_PR)
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report_fatal_error("Unhandled storage-mapping class for .text csect");
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printCsectDirective(OS);
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return;
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}
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if (getKind().isReadOnly()) {
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if (getMappingClass() != XCOFF::XMC_RO)
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report_fatal_error("Unhandled storage-mapping class for .rodata csect.");
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printCsectDirective(OS);
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return;
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}
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if (getKind().isData()) {
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switch (getMappingClass()) {
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case XCOFF::XMC_RW:
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case XCOFF::XMC_DS:
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printCsectDirective(OS);
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break;
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case XCOFF::XMC_TC:
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case XCOFF::XMC_TE:
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break;
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case XCOFF::XMC_TC0:
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OS << "\t.toc\n";
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break;
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default:
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report_fatal_error(
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"Unhandled storage-mapping class for .data csect.");
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}
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return;
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}
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if (getKind().isBSSLocal() || getKind().isCommon()) {
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assert((getMappingClass() == XCOFF::XMC_RW ||
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getMappingClass() == XCOFF::XMC_BS) &&
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"Generated a storage-mapping class for a common/bss csect we don't "
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"understand how to switch to.");
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assert(getCSectType() == XCOFF::XTY_CM &&
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"wrong csect type for .bss csect");
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// Don't have to print a directive for switching to section for commons.
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// '.comm' and '.lcomm' directives for the variable will create the needed
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// csect.
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return;
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}
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report_fatal_error("Printing for this SectionKind is unimplemented.");
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}
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bool MCSectionXCOFF::UseCodeAlign() const { return getKind().isText(); }
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bool MCSectionXCOFF::isVirtualSection() const { return XCOFF::XTY_CM == Type; }
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