| //===- lib/MC/MCSectionWasm.cpp - Wasm Code Section Representation --------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/MC/MCSectionWasm.h" |
| #include "llvm/MC/MCAsmInfo.h" |
| #include "llvm/MC/MCExpr.h" |
| #include "llvm/MC/MCSymbol.h" |
| #include "llvm/MC/MCSymbolWasm.h" |
| #include "llvm/Support/raw_ostream.h" |
| |
| using namespace llvm; |
| |
| // Decides whether a '.section' directive |
| // should be printed before the section name. |
| bool MCSectionWasm::shouldOmitSectionDirective(StringRef Name, |
| const MCAsmInfo &MAI) const { |
| return MAI.shouldOmitSectionDirective(Name); |
| } |
| |
| static void printName(raw_ostream &OS, StringRef Name) { |
| if (Name.find_first_not_of("0123456789_." |
| "abcdefghijklmnopqrstuvwxyz" |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZ") == Name.npos) { |
| OS << Name; |
| return; |
| } |
| OS << '"'; |
| for (const char *B = Name.begin(), *E = Name.end(); B < E; ++B) { |
| if (*B == '"') // Unquoted " |
| OS << "\\\""; |
| else if (*B != '\\') // Neither " or backslash |
| OS << *B; |
| else if (B + 1 == E) // Trailing backslash |
| OS << "\\\\"; |
| else { |
| OS << B[0] << B[1]; // Quoted character |
| ++B; |
| } |
| } |
| OS << '"'; |
| } |
| |
| void MCSectionWasm::PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T, |
| raw_ostream &OS, |
| const MCExpr *Subsection) const { |
| |
| if (shouldOmitSectionDirective(getName(), MAI)) { |
| OS << '\t' << getName(); |
| if (Subsection) { |
| OS << '\t'; |
| Subsection->print(OS, &MAI); |
| } |
| OS << '\n'; |
| return; |
| } |
| |
| OS << "\t.section\t"; |
| printName(OS, getName()); |
| OS << ",\""; |
| |
| if (IsPassive) |
| OS << 'p'; |
| if (Group) |
| OS << 'G'; |
| if (SegmentFlags & wasm::WASM_SEG_FLAG_STRINGS) |
| OS << 'S'; |
| if (SegmentFlags & wasm::WASM_SEG_FLAG_TLS) |
| OS << 'T'; |
| |
| OS << '"'; |
| |
| OS << ','; |
| |
| // If comment string is '@', e.g. as on ARM - use '%' instead |
| if (MAI.getCommentString()[0] == '@') |
| OS << '%'; |
| else |
| OS << '@'; |
| |
| // TODO: Print section type. |
| |
| if (Group) { |
| OS << ","; |
| printName(OS, Group->getName()); |
| OS << ",comdat"; |
| } |
| |
| if (isUnique()) |
| OS << ",unique," << UniqueID; |
| |
| OS << '\n'; |
| |
| if (Subsection) { |
| OS << "\t.subsection\t"; |
| Subsection->print(OS, &MAI); |
| OS << '\n'; |
| } |
| } |
| |
| bool MCSectionWasm::UseCodeAlign() const { return false; } |
| |
| bool MCSectionWasm::isVirtualSection() const { return false; } |