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065031a098
Summary: Rename MemoryIndex to InitFlags and implement logic for determining data segment layout in ObjectYAML and MC. Also adds a "passive" flag for the .section assembler directive although this cannot be assembled yet because the assembler does not support data sections. Reviewers: sbc100, aardappel, aheejin, dschuff Subscribers: jgravelle-google, hiraditya, sunfish, rupprecht, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D57938 llvm-svn: 354397
95 lines
2.4 KiB
C++
95 lines
2.4 KiB
C++
//===- lib/MC/MCSectionWasm.cpp - Wasm 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/MCSectionWasm.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/MC/MCSymbol.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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// Decides whether a '.section' directive
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// should be printed before the section name.
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bool MCSectionWasm::shouldOmitSectionDirective(StringRef Name,
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const MCAsmInfo &MAI) const {
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return MAI.shouldOmitSectionDirective(Name);
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}
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static void printName(raw_ostream &OS, StringRef Name) {
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if (Name.find_first_not_of("0123456789_."
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"abcdefghijklmnopqrstuvwxyz"
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"ABCDEFGHIJKLMNOPQRSTUVWXYZ") == Name.npos) {
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OS << Name;
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return;
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}
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OS << '"';
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for (const char *B = Name.begin(), *E = Name.end(); B < E; ++B) {
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if (*B == '"') // Unquoted "
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OS << "\\\"";
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else if (*B != '\\') // Neither " or backslash
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OS << *B;
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else if (B + 1 == E) // Trailing backslash
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OS << "\\\\";
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else {
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OS << B[0] << B[1]; // Quoted character
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++B;
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}
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}
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OS << '"';
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}
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void MCSectionWasm::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 (shouldOmitSectionDirective(SectionName, MAI)) {
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OS << '\t' << getSectionName();
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if (Subsection) {
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OS << '\t';
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Subsection->print(OS, &MAI);
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}
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OS << '\n';
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return;
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}
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OS << "\t.section\t";
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printName(OS, getSectionName());
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OS << ",\"";
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if (IsPassive)
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OS << "passive";
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OS << '"';
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OS << ',';
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// If comment string is '@', e.g. as on ARM - use '%' instead
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if (MAI.getCommentString()[0] == '@')
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OS << '%';
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else
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OS << '@';
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// TODO: Print section type.
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if (isUnique())
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OS << ",unique," << UniqueID;
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OS << '\n';
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if (Subsection) {
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OS << "\t.subsection\t";
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Subsection->print(OS, &MAI);
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OS << '\n';
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}
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}
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bool MCSectionWasm::UseCodeAlign() const { return false; }
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bool MCSectionWasm::isVirtualSection() const { return false; }
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