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/Constants.h"
16 #include "llvm/DerivedTypes.h"
17 #include "llvm/GlobalVariable.h"
18 #include "llvm/Function.h"
19 #include "llvm/Module.h"
20 #include "llvm/Type.h"
21 #include "llvm/Target/TargetAsmInfo.h"
22 #include "llvm/Target/TargetData.h"
23 #include "llvm/Target/TargetMachine.h"
24 #include "llvm/Target/TargetOptions.h"
25 #include "llvm/Support/Dwarf.h"
26 #include "llvm/Support/ErrorHandling.h"
31 TargetAsmInfo::TargetAsmInfo(const TargetMachine &tm) : TM(tm) {
32 ZeroFillDirective = 0;
33 NonexecutableStackDirective = 0;
40 FirstOperandColumn = 0;
43 PrivateGlobalPrefix = ".";
44 LinkerPrivateGlobalPrefix = "";
45 JumpTableSpecialLabelPrefix = 0;
46 GlobalVarAddrPrefix = "";
47 GlobalVarAddrSuffix = "";
48 FunctionAddrPrefix = "";
49 FunctionAddrSuffix = "";
50 PersonalityPrefix = "";
51 PersonalitySuffix = "";
52 NeedsIndirectEncoding = false;
53 InlineAsmStart = "#APP";
54 InlineAsmEnd = "#NO_APP";
56 AllowQuotesInName = false;
57 ZeroDirective = "\t.zero\t";
58 ZeroDirectiveSuffix = 0;
59 AsciiDirective = "\t.ascii\t";
60 AscizDirective = "\t.asciz\t";
61 Data8bitsDirective = "\t.byte\t";
62 Data16bitsDirective = "\t.short\t";
63 Data32bitsDirective = "\t.long\t";
64 Data64bitsDirective = "\t.quad\t";
65 AlignDirective = "\t.align\t";
66 AlignmentIsInBytes = true;
67 TextAlignFillValue = 0;
68 SwitchToSectionDirective = "\t.section\t";
69 TextSectionStartSuffix = "";
70 DataSectionStartSuffix = "";
71 SectionEndDirectiveSuffix = 0;
72 JumpTableDirective = 0;
73 GlobalDirective = "\t.globl\t";
76 COMMDirective = "\t.comm\t";
77 COMMDirectiveTakesAlignment = true;
78 HasDotTypeDotSizeDirective = true;
79 HasSingleParameterDotFile = true;
83 // FIXME: These are ELFish - move to ELFTAI.
84 HiddenDirective = "\t.hidden\t";
85 ProtectedDirective = "\t.protected\t";
86 AbsoluteDebugSectionOffsets = false;
87 AbsoluteEHSectionOffsets = false;
89 HasDotLocAndDotFile = false;
90 SupportsDebugInformation = false;
91 SupportsExceptionHandling = false;
92 DwarfRequiresFrameSection = true;
93 DwarfUsesInlineInfoSection = false;
94 Is_EHSymbolPrivate = true;
95 GlobalEHDirective = 0;
96 SupportsWeakOmittedEHFrame = true;
97 DwarfSectionOffsetDirective = 0;
98 DwarfAbbrevSection = ".debug_abbrev";
99 DwarfInfoSection = ".debug_info";
100 DwarfLineSection = ".debug_line";
101 DwarfFrameSection = ".debug_frame";
102 DwarfPubNamesSection = ".debug_pubnames";
103 DwarfPubTypesSection = ".debug_pubtypes";
104 DwarfDebugInlineSection = ".debug_inlined";
105 DwarfStrSection = ".debug_str";
106 DwarfLocSection = ".debug_loc";
107 DwarfARangesSection = ".debug_aranges";
108 DwarfRangesSection = ".debug_ranges";
109 DwarfMacroInfoSection = ".debug_macinfo";
110 DwarfEHFrameSection = ".eh_frame";
114 TargetAsmInfo::~TargetAsmInfo() {
117 /// Measure the specified inline asm to determine an approximation of its
119 /// Comments (which run till the next SeparatorChar or newline) do not
120 /// count as an instruction.
121 /// Any other non-whitespace text is considered an instruction, with
122 /// multiple instructions separated by SeparatorChar or newlines.
123 /// Variable-length instructions are not handled here; this function
124 /// may be overloaded in the target code to do that.
125 unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
126 // Count the number of instructions in the asm.
127 bool atInsnStart = true;
129 for (; *Str; ++Str) {
130 if (*Str == '\n' || *Str == SeparatorChar)
132 if (atInsnStart && !isspace(*Str)) {
133 Length += MaxInstLength;
136 if (atInsnStart && strncmp(Str, CommentString, strlen(CommentString))==0)
143 unsigned TargetAsmInfo::PreferredEHDataFormat() const {
144 return dwarf::DW_EH_PE_absptr;
147 unsigned TargetAsmInfo::getULEB128Size(unsigned Value) {
151 Size += sizeof(int8_t);
156 unsigned TargetAsmInfo::getSLEB128Size(int Value) {
158 int Sign = Value >> (8 * sizeof(Value) - 1);
162 unsigned Byte = Value & 0x7f;
164 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
165 Size += sizeof(int8_t);