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   GlobalVarAddrPrefix(""),
  32   GlobalVarAddrSuffix(""),
  33   FunctionAddrPrefix(""),
  34   FunctionAddrSuffix(""),
  35   InlineAsmStart("#APP"),
  36   InlineAsmEnd("#NO_APP"),
  37   AssemblerDialect(0),
  38   ZeroDirective("\t.zero\t"),
  39   ZeroDirectiveSuffix(0),
  40   AsciiDirective("\t.ascii\t"),
  41   AscizDirective("\t.asciz\t"),
  42   Data8bitsDirective("\t.byte\t"),
  43   Data16bitsDirective("\t.short\t"),
  44   Data32bitsDirective("\t.long\t"),
  45   Data64bitsDirective("\t.quad\t"),
  46   AlignDirective("\t.align\t"),
  47   AlignmentIsInBytes(true),
  48   SwitchToSectionDirective("\t.section\t"),
  49   TextSectionStartSuffix(""),
  50   DataSectionStartSuffix(""),
  51   SectionEndDirectiveSuffix(0),
  52   ConstantPoolSection("\t.section .rodata\n"),
  53   JumpTableDataSection("\t.section .rodata\n"),
  54   JumpTableDirective(0),
  55   CStringSection(0),
  56   StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
  57   StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
  58   FourByteConstantSection(0),
  59   EightByteConstantSection(0),
  60   SixteenByteConstantSection(0),
  61   SetDirective(0),
  62   LCOMMDirective(0),
  63   COMMDirective("\t.comm\t"),
  64   COMMDirectiveTakesAlignment(true),
  65   HasDotTypeDotSizeDirective(true),
  66   UsedDirective(0),
  67   WeakRefDirective(0),
  68   HiddenDirective("\t.hidden\t"),
  69   HasLEB128(false),
  70   HasDotLoc(false),
  71   HasDotFile(false),
  72   DwarfRequiresFrameSection(true),
  73   DwarfAbbrevSection(".debug_abbrev"),
  74   DwarfInfoSection(".debug_info"),
  75   DwarfLineSection(".debug_line"),
  76   DwarfFrameSection(".debug_frame"),
  77   DwarfPubNamesSection(".debug_pubnames"),
  78   DwarfPubTypesSection(".debug_pubtypes"),
  79   DwarfStrSection(".debug_str"),
  80   DwarfLocSection(".debug_loc"),
  81   DwarfARangesSection(".debug_aranges"),
  82   DwarfRangesSection(".debug_ranges"),
  83   DwarfMacInfoSection(".debug_macinfo"),
  84   AsmTransCBE(0) {
  85 }
  86
  87 TargetAsmInfo::~TargetAsmInfo() {
  88 }
  89
  90 /// Measure the specified inline asm to determine an approximation of its
  91 /// length.
  92 unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
  93   // Count the number of instructions in the asm.
  94   unsigned NumInsts = 0;
  95   for (; *Str; ++Str) {
  96     if (*Str == '\n' || *Str == SeparatorChar)
  97       ++NumInsts;
  98   }
  99
 100   // Multiply by the worst-case length for each instruction.
 101   return NumInsts * MaxInstLength;
 102 }