lib/Target/TargetAsmInfo.cpp

   1 //===-- TargetAsmInfo.cpp - Asm Info ---------------------------------------==//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by James M. Laskey and is distributed under
   6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file defines target asm properties related what form asm statements
  11 // should take.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "llvm/Target/TargetAsmInfo.h"
  16
  17 using namespace llvm;
  18
  19 TargetAsmInfo::TargetAsmInfo() :
  20   TextSection(".text"),
  21   DataSection(".data"),
  22   BSSSection(".bss"),
  23   ZeroFillDirective(0),
  24   AddressSize(4),
  25   NeedsSet(false),
  26   MaxInstLength(4),
  27   SeparatorChar(';'),
  28   CommentString("#"),
  29   GlobalPrefix(""),
  30   PrivateGlobalPrefix("."),
  31   JumpTableSpecialLabelPrefix(0),
  32   GlobalVarAddrPrefix(""),
  33   GlobalVarAddrSuffix(""),
  34   FunctionAddrPrefix(""),
  35   FunctionAddrSuffix(""),
  36   InlineAsmStart("#APP"),
  37   InlineAsmEnd("#NO_APP"),
  38   AssemblerDialect(0),
  39   ZeroDirective("\t.zero\t"),
  40   ZeroDirectiveSuffix(0),
  41   AsciiDirective("\t.ascii\t"),
  42   AscizDirective("\t.asciz\t"),
  43   Data8bitsDirective("\t.byte\t"),
  44   Data16bitsDirective("\t.short\t"),
  45   Data32bitsDirective("\t.long\t"),
  46   Data64bitsDirective("\t.quad\t"),
  47   AlignDirective("\t.align\t"),
  48   AlignmentIsInBytes(true),
  49   SwitchToSectionDirective("\t.section\t"),
  50   TextSectionStartSuffix(""),
  51   DataSectionStartSuffix(""),
  52   SectionEndDirectiveSuffix(0),
  53   ConstantPoolSection("\t.section .rodata\n"),
  54   JumpTableDataSection("\t.section .rodata\n"),
  55   JumpTableDirective(0),
  56   CStringSection(0),
  57   StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
  58   StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
  59   FourByteConstantSection(0),
  60   EightByteConstantSection(0),
  61   SixteenByteConstantSection(0),
  62   GlobalDirective(0),
  63   SetDirective(0),
  64   LCOMMDirective(0),
  65   COMMDirective("\t.comm\t"),
  66   COMMDirectiveTakesAlignment(true),
  67   HasDotTypeDotSizeDirective(true),
  68   UsedDirective(0),
  69   WeakRefDirective(0),
  70   HiddenDirective("\t.hidden\t"),
  71   HasLEB128(false),
  72   HasDotLoc(false),
  73   HasDotFile(false),
  74   SupportsExceptionHandling(false),
  75   DwarfRequiresFrameSection(true),
  76   DwarfAbbrevSection(".debug_abbrev"),
  77   DwarfInfoSection(".debug_info"),
  78   DwarfLineSection(".debug_line"),
  79   DwarfFrameSection(".debug_frame"),
  80   DwarfPubNamesSection(".debug_pubnames"),
  81   DwarfPubTypesSection(".debug_pubtypes"),
  82   DwarfStrSection(".debug_str"),
  83   DwarfLocSection(".debug_loc"),
  84   DwarfARangesSection(".debug_aranges"),
  85   DwarfRangesSection(".debug_ranges"),
  86   DwarfMacInfoSection(".debug_macinfo"),
  87   AsmTransCBE(0) {
  88 }
  89
  90 TargetAsmInfo::~TargetAsmInfo() {
  91 }
  92
  93 /// Measure the specified inline asm to determine an approximation of its
  94 /// length.
  95 unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
  96   // Count the number of instructions in the asm.
  97   unsigned NumInsts = 0;
  98   for (; *Str; ++Str) {
  99     if (*Str == '\n' || *Str == SeparatorChar)
 100       ++NumInsts;
 101   }
 102
 103   // Multiply by the worst-case length for each instruction.
 104   return NumInsts * MaxInstLength;
 105 }