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   TLSDataSection("\t.section .tdata,\"awT\",@progbits"),
  24   TLSBSSSection("\t.section .tbss,\"awT\",@nobits"),
  25   ZeroFillDirective(0),
  26   AddressSize(4),
  27   NeedsSet(false),
  28   MaxInstLength(4),
  29   PCSymbol("$"),
  30   SeparatorChar(';'),
  31   CommentString("#"),
  32   GlobalPrefix(""),
  33   PrivateGlobalPrefix("."),
  34   JumpTableSpecialLabelPrefix(0),
  35   GlobalVarAddrPrefix(""),
  36   GlobalVarAddrSuffix(""),
  37   FunctionAddrPrefix(""),
  38   FunctionAddrSuffix(""),
  39   InlineAsmStart("#APP"),
  40   InlineAsmEnd("#NO_APP"),
  41   AssemblerDialect(0),
  42   ZeroDirective("\t.zero\t"),
  43   ZeroDirectiveSuffix(0),
  44   AsciiDirective("\t.ascii\t"),
  45   AscizDirective("\t.asciz\t"),
  46   Data8bitsDirective("\t.byte\t"),
  47   Data16bitsDirective("\t.short\t"),
  48   Data32bitsDirective("\t.long\t"),
  49   Data64bitsDirective("\t.quad\t"),
  50   AlignDirective("\t.align\t"),
  51   AlignmentIsInBytes(true),
  52   SwitchToSectionDirective("\t.section\t"),
  53   TextSectionStartSuffix(""),
  54   DataSectionStartSuffix(""),
  55   SectionEndDirectiveSuffix(0),
  56   ConstantPoolSection("\t.section .rodata\n"),
  57   JumpTableDataSection("\t.section .rodata\n"),
  58   JumpTableDirective(0),
  59   CStringSection(0),
  60   StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
  61   StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
  62   FourByteConstantSection(0),
  63   EightByteConstantSection(0),
  64   SixteenByteConstantSection(0),
  65   ReadOnlySection(0),
  66   GlobalDirective(0),
  67   SetDirective(0),
  68   LCOMMDirective(0),
  69   COMMDirective("\t.comm\t"),
  70   COMMDirectiveTakesAlignment(true),
  71   HasDotTypeDotSizeDirective(true),
  72   UsedDirective(0),
  73   WeakRefDirective(0),
  74   HiddenDirective("\t.hidden\t"),
  75   AbsoluteSectionOffsets(false),
  76   HasLEB128(false),
  77   HasDotLoc(false),
  78   HasDotFile(false),
  79   SupportsExceptionHandling(false),
  80   DwarfRequiresFrameSection(true),
  81   DwarfSectionOffsetDirective(0),
  82   DwarfAbbrevSection(".debug_abbrev"),
  83   DwarfInfoSection(".debug_info"),
  84   DwarfLineSection(".debug_line"),
  85   DwarfFrameSection(".debug_frame"),
  86   DwarfPubNamesSection(".debug_pubnames"),
  87   DwarfPubTypesSection(".debug_pubtypes"),
  88   DwarfStrSection(".debug_str"),
  89   DwarfLocSection(".debug_loc"),
  90   DwarfARangesSection(".debug_aranges"),
  91   DwarfRangesSection(".debug_ranges"),
  92   DwarfMacInfoSection(".debug_macinfo"),
  93   DwarfEHFrameSection(".eh_frame"),
  94   DwarfExceptionSection(".gcc_except_table"),
  95   AsmTransCBE(0) {
  96 }
  97
  98 TargetAsmInfo::~TargetAsmInfo() {
  99 }
 100
 101 /// Measure the specified inline asm to determine an approximation of its
 102 /// length.
 103 unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
 104   // Count the number of instructions in the asm.
 105   unsigned NumInsts = 0;
 106   for (; *Str; ++Str) {
 107     if (*Str == '\n' || *Str == SeparatorChar)
 108       ++NumInsts;
 109   }
 110
 111   // Multiply by the worst-case length for each instruction.
 112   return NumInsts * MaxInstLength;
 113 }
 114