1 //===-- TargetAsmInfo.cpp - Asm Info ---------------------------------------==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines target asm properties related what form asm statements
13 //===----------------------------------------------------------------------===//
15 #include "llvm/Target/TargetAsmInfo.h"
16 #include "llvm/Support/Dwarf.h"
22 TargetAsmInfo::TargetAsmInfo() :
23 TextSection("\t.text"),
24 DataSection("\t.data"),
26 TLSDataSection("\t.section .tdata,\"awT\",@progbits"),
27 TLSBSSSection("\t.section .tbss,\"awT\",@nobits"),
35 PrivateGlobalPrefix("."),
36 JumpTableSpecialLabelPrefix(0),
37 GlobalVarAddrPrefix(""),
38 GlobalVarAddrSuffix(""),
39 FunctionAddrPrefix(""),
40 FunctionAddrSuffix(""),
41 PersonalityPrefix(""),
42 PersonalitySuffix(""),
43 NeedsIndirectEncoding(false),
44 InlineAsmStart("#APP"),
45 InlineAsmEnd("#NO_APP"),
47 ZeroDirective("\t.zero\t"),
48 ZeroDirectiveSuffix(0),
49 AsciiDirective("\t.ascii\t"),
50 AscizDirective("\t.asciz\t"),
51 Data8bitsDirective("\t.byte\t"),
52 Data16bitsDirective("\t.short\t"),
53 Data32bitsDirective("\t.long\t"),
54 Data64bitsDirective("\t.quad\t"),
55 AlignDirective("\t.align\t"),
56 AlignmentIsInBytes(true),
57 SwitchToSectionDirective("\t.section\t"),
58 TextSectionStartSuffix(""),
59 DataSectionStartSuffix(""),
60 SectionEndDirectiveSuffix(0),
61 ConstantPoolSection("\t.section .rodata"),
62 JumpTableDataSection("\t.section .rodata"),
63 JumpTableDirective(0),
65 StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
66 StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
67 FourByteConstantSection(0),
68 EightByteConstantSection(0),
69 SixteenByteConstantSection(0),
71 GlobalDirective("\t.globl\t"),
74 COMMDirective("\t.comm\t"),
75 COMMDirectiveTakesAlignment(true),
76 HasDotTypeDotSizeDirective(true),
80 HiddenDirective("\t.hidden\t"),
81 ProtectedDirective("\t.protected\t"),
82 AbsoluteDebugSectionOffsets(false),
83 AbsoluteEHSectionOffsets(false),
85 HasDotLocAndDotFile(false),
86 SupportsDebugInformation(false),
87 SupportsExceptionHandling(false),
88 DwarfRequiresFrameSection(true),
90 SupportsWeakOmittedEHFrame(true),
91 ShortenEHDataOn64Bit(false),
92 DwarfSectionOffsetDirective(0),
93 DwarfAbbrevSection(".debug_abbrev"),
94 DwarfInfoSection(".debug_info"),
95 DwarfLineSection(".debug_line"),
96 DwarfFrameSection(".debug_frame"),
97 DwarfPubNamesSection(".debug_pubnames"),
98 DwarfPubTypesSection(".debug_pubtypes"),
99 DwarfStrSection(".debug_str"),
100 DwarfLocSection(".debug_loc"),
101 DwarfARangesSection(".debug_aranges"),
102 DwarfRangesSection(".debug_ranges"),
103 DwarfMacInfoSection(".debug_macinfo"),
104 DwarfEHFrameSection(".eh_frame"),
105 DwarfExceptionSection(".gcc_except_table"),
109 TargetAsmInfo::~TargetAsmInfo() {
112 /// Measure the specified inline asm to determine an approximation of its
114 /// Comments (which run till the next SeparatorChar or newline) do not
115 /// count as an instruction.
116 /// Any other non-whitespace text is considered an instruction, with
117 /// multiple instructions separated by SeparatorChar or newlines.
118 /// Variable-length instructions are not handled here; this function
119 /// may be overloaded in the target code to do that.
120 unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
121 // Count the number of instructions in the asm.
122 bool atInsnStart = true;
124 for (; *Str; ++Str) {
125 if (*Str == '\n' || *Str == SeparatorChar)
127 if (atInsnStart && !isspace(*Str)) {
128 Length += MaxInstLength;
131 if (atInsnStart && strncmp(Str, CommentString, strlen(CommentString))==0)
138 unsigned TargetAsmInfo::PreferredEHDataFormat(unsigned Reason,
140 return dwarf::DW_EH_PE_absptr;