1 //===- lib/MC/MCSectionWasm.cpp - Wasm Code Section Representation --------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "llvm/MC/MCSectionWasm.h"
10 #include "llvm/MC/MCAsmInfo.h"
11 #include "llvm/MC/MCExpr.h"
12 #include "llvm/MC/MCSymbol.h"
13 #include "llvm/Support/raw_ostream.h"
14
15 using namespace llvm;
16
17 // Decides whether a '.section' directive
18 // should be printed before the section name.
shouldOmitSectionDirective(StringRef Name,const MCAsmInfo & MAI) const19 bool MCSectionWasm::shouldOmitSectionDirective(StringRef Name,
20 const MCAsmInfo &MAI) const {
21 return MAI.shouldOmitSectionDirective(Name);
22 }
23
printName(raw_ostream & OS,StringRef Name)24 static void printName(raw_ostream &OS, StringRef Name) {
25 if (Name.find_first_not_of("0123456789_."
26 "abcdefghijklmnopqrstuvwxyz"
27 "ABCDEFGHIJKLMNOPQRSTUVWXYZ") == Name.npos) {
28 OS << Name;
29 return;
30 }
31 OS << '"';
32 for (const char *B = Name.begin(), *E = Name.end(); B < E; ++B) {
33 if (*B == '"') // Unquoted "
34 OS << "\\\"";
35 else if (*B != '\\') // Neither " or backslash
36 OS << *B;
37 else if (B + 1 == E) // Trailing backslash
38 OS << "\\\\";
39 else {
40 OS << B[0] << B[1]; // Quoted character
41 ++B;
42 }
43 }
44 OS << '"';
45 }
46
PrintSwitchToSection(const MCAsmInfo & MAI,const Triple & T,raw_ostream & OS,const MCExpr * Subsection) const47 void MCSectionWasm::PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
48 raw_ostream &OS,
49 const MCExpr *Subsection) const {
50
51 if (shouldOmitSectionDirective(SectionName, MAI)) {
52 OS << '\t' << getSectionName();
53 if (Subsection) {
54 OS << '\t';
55 Subsection->print(OS, &MAI);
56 }
57 OS << '\n';
58 return;
59 }
60
61 OS << "\t.section\t";
62 printName(OS, getSectionName());
63 OS << ",\"";
64
65 if (IsPassive)
66 OS << "passive";
67
68 OS << '"';
69
70 OS << ',';
71
72 // If comment string is '@', e.g. as on ARM - use '%' instead
73 if (MAI.getCommentString()[0] == '@')
74 OS << '%';
75 else
76 OS << '@';
77
78 // TODO: Print section type.
79
80 if (isUnique())
81 OS << ",unique," << UniqueID;
82
83 OS << '\n';
84
85 if (Subsection) {
86 OS << "\t.subsection\t";
87 Subsection->print(OS, &MAI);
88 OS << '\n';
89 }
90 }
91
UseCodeAlign() const92 bool MCSectionWasm::UseCodeAlign() const { return false; }
93
isVirtualSection() const94 bool MCSectionWasm::isVirtualSection() const { return false; }
95