1 //===- lib/MC/MCSectionWasm.cpp - Wasm Code Section Representation --------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "llvm/MC/MCSectionWasm.h"
11 #include "llvm/MC/MCAsmInfo.h"
12 #include "llvm/MC/MCExpr.h"
13 #include "llvm/MC/MCSymbol.h"
14 #include "llvm/Support/raw_ostream.h"
15
16 using namespace llvm;
17
~MCSectionWasm()18 MCSectionWasm::~MCSectionWasm() {} // anchor.
19
20 // Decides whether a '.section' directive
21 // should be printed before the section name.
ShouldOmitSectionDirective(StringRef Name,const MCAsmInfo & MAI) const22 bool MCSectionWasm::ShouldOmitSectionDirective(StringRef Name,
23 const MCAsmInfo &MAI) const {
24 return MAI.shouldOmitSectionDirective(Name);
25 }
26
printName(raw_ostream & OS,StringRef Name)27 static void printName(raw_ostream &OS, StringRef Name) {
28 if (Name.find_first_not_of("0123456789_."
29 "abcdefghijklmnopqrstuvwxyz"
30 "ABCDEFGHIJKLMNOPQRSTUVWXYZ") == Name.npos) {
31 OS << Name;
32 return;
33 }
34 OS << '"';
35 for (const char *B = Name.begin(), *E = Name.end(); B < E; ++B) {
36 if (*B == '"') // Unquoted "
37 OS << "\\\"";
38 else if (*B != '\\') // Neither " or backslash
39 OS << *B;
40 else if (B + 1 == E) // Trailing backslash
41 OS << "\\\\";
42 else {
43 OS << B[0] << B[1]; // Quoted character
44 ++B;
45 }
46 }
47 OS << '"';
48 }
49
PrintSwitchToSection(const MCAsmInfo & MAI,const Triple & T,raw_ostream & OS,const MCExpr * Subsection) const50 void MCSectionWasm::PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
51 raw_ostream &OS,
52 const MCExpr *Subsection) const {
53
54 if (ShouldOmitSectionDirective(SectionName, MAI)) {
55 OS << '\t' << getSectionName();
56 if (Subsection) {
57 OS << '\t';
58 Subsection->print(OS, &MAI);
59 }
60 OS << '\n';
61 return;
62 }
63
64 OS << "\t.section\t";
65 printName(OS, getSectionName());
66 OS << ",\"";
67
68 // TODO: Print section flags.
69
70 OS << '"';
71
72 OS << ',';
73
74 // If comment string is '@', e.g. as on ARM - use '%' instead
75 if (MAI.getCommentString()[0] == '@')
76 OS << '%';
77 else
78 OS << '@';
79
80 // TODO: Print section type.
81
82 if (isUnique())
83 OS << ",unique," << UniqueID;
84
85 OS << '\n';
86
87 if (Subsection) {
88 OS << "\t.subsection\t";
89 Subsection->print(OS, &MAI);
90 OS << '\n';
91 }
92 }
93
UseCodeAlign() const94 bool MCSectionWasm::UseCodeAlign() const { return false; }
95
isVirtualSection() const96 bool MCSectionWasm::isVirtualSection() const { return false; }
97