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   AddressSize(4),
  23   NeedsSet(false),
  24   MaxInstLength(4),
  25   SeparatorChar(';'),
  26   CommentString("#"),
  27   GlobalPrefix(""),
  28   PrivateGlobalPrefix("."),
  29   GlobalVarAddrPrefix(""),
  30   GlobalVarAddrSuffix(""),
  31   FunctionAddrPrefix(""),
  32   FunctionAddrSuffix(""),
  33   InlineAsmStart("#APP"),
  34   InlineAsmEnd("#NO_APP"),
  35   AssemblerDialect(0),
  36   ZeroDirective("\t.zero\t"),
  37   ZeroDirectiveSuffix(0),
  38   AsciiDirective("\t.ascii\t"),
  39   AscizDirective("\t.asciz\t"),
  40   Data8bitsDirective("\t.byte\t"),
  41   Data16bitsDirective("\t.short\t"),
  42   Data32bitsDirective("\t.long\t"),
  43   Data64bitsDirective("\t.quad\t"),
  44   AlignDirective("\t.align\t"),
  45   AlignmentIsInBytes(true),
  46   SwitchToSectionDirective("\t.section\t"),
  47   TextSectionStartSuffix(""),
  48   DataSectionStartSuffix(""),
  49   SectionEndDirectiveSuffix(0),
  50   ConstantPoolSection("\t.section .rodata\n"),
  51   JumpTableDataSection("\t.section .rodata\n"),
  52   JumpTableDirective(0),
  53   CStringSection(0),
  54   StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
  55   StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
  56   FourByteConstantSection(0),
  57   EightByteConstantSection(0),
  58   SixteenByteConstantSection(0),
  59   SetDirective(0),
  60   LCOMMDirective(0),
  61   COMMDirective("\t.comm\t"),
  62   COMMDirectiveTakesAlignment(true),
  63   HasDotTypeDotSizeDirective(true),
  64   UsedDirective(0),
  65   WeakRefDirective(0),
  66   HiddenDirective("\t.hidden\t"),
  67   HasLEB128(false),
  68   HasDotLoc(false),
  69   HasDotFile(false),
  70   DwarfRequiresFrameSection(true),
  71   DwarfAbbrevSection(".debug_abbrev"),
  72   DwarfInfoSection(".debug_info"),
  73   DwarfLineSection(".debug_line"),
  74   DwarfFrameSection(".debug_frame"),
  75   DwarfPubNamesSection(".debug_pubnames"),
  76   DwarfPubTypesSection(".debug_pubtypes"),
  77   DwarfStrSection(".debug_str"),
  78   DwarfLocSection(".debug_loc"),
  79   DwarfARangesSection(".debug_aranges"),
  80   DwarfRangesSection(".debug_ranges"),
  81   DwarfMacInfoSection(".debug_macinfo"),
  82   AsmTransCBE(0) {
  83 }
  84
  85 TargetAsmInfo::~TargetAsmInfo() {
  86 }
  87
  88 /// Measure the specified inline asm to determine an approximation of its
  89 /// length.
  90 unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
  91   // Count the number of instructions in the asm.
  92   unsigned NumInsts = 0;
  93   for (; *Str; ++Str) {
  94     if (*Str == '\n' || *Str == SeparatorChar)
  95       ++NumInsts;
  96   }
  97
  98   // Multiply by the worst-case length for each instruction.
  99   return NumInsts * MaxInstLength;
 100 }