llvm/lib/MC/MCAsmInfoXCOFF.cpp

   1 //===- MC/MCAsmInfoXCOFF.cpp - XCOFF asm properties ------------ *- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/MC/MCAsmInfoXCOFF.h"
  10 #include "llvm/ADT/StringExtras.h"
  11 #include "llvm/Support/CommandLine.h"
  12
  13 using namespace llvm;
  14
  15 namespace llvm {
  16 extern cl::opt<cl::boolOrDefault> UseLEB128Directives;
  17 }
  18
  19 void MCAsmInfoXCOFF::anchor() {}
  20
  21 MCAsmInfoXCOFF::MCAsmInfoXCOFF() {
  22   IsLittleEndian = false;
  23   HasVisibilityOnlyWithLinkage = true;
  24   HasBasenameOnlyForFileDirective = false;
  25   HasFourStringsDotFile = true;
  26
  27   // For XCOFF, string constant consists of any number of characters enclosed in
  28   // "" (double quotation marks).
  29   HasPairedDoubleQuoteStringConstants = true;
  30
  31   PrivateGlobalPrefix = "L..";
  32   PrivateLabelPrefix = "L..";
  33   SupportsQuotedNames = false;
  34   UseDotAlignForAlignment = true;
  35   UsesDwarfFileAndLocDirectives = false;
  36   DwarfSectionSizeRequired = false;
  37   if (UseLEB128Directives == cl::BOU_UNSET)
  38     HasLEB128Directives = false;
  39   ZeroDirective = "\t.space\t";
  40   ZeroDirectiveSupportsNonZeroValue = false;
  41   AsciiDirective = nullptr; // not supported
  42   AscizDirective = nullptr; // not supported
  43   ByteListDirective = "\t.byte\t";
  44   PlainStringDirective = "\t.string\t";
  45   CharacterLiteralSyntax = ACLS_SingleQuotePrefix;
  46
  47   // Use .vbyte for data definition to avoid directives that apply an implicit
  48   // alignment.
  49   Data16bitsDirective = "\t.vbyte\t2, ";
  50   Data32bitsDirective = "\t.vbyte\t4, ";
  51
  52   COMMDirectiveAlignmentIsInBytes = false;
  53   LCOMMDirectiveAlignmentType = LCOMM::Log2Alignment;
  54   HasDotTypeDotSizeDirective = false;
  55   ParseInlineAsmUsingAsmParser = true;
  56   NeedsFunctionDescriptors = true;
  57
  58   ExceptionsType = ExceptionHandling::AIX;
  59 }
  60
  61 bool MCAsmInfoXCOFF::isAcceptableChar(char C) const {
  62   // QualName is allowed for a MCSymbolXCOFF, and
  63   // QualName contains '[' and ']'.
  64   if (C == '[' || C == ']')
  65     return true;
  66
  67   // For AIX assembler, symbols may consist of numeric digits,
  68   // underscores, periods, uppercase or lowercase letters, or
  69   // any combination of these.
  70   return isAlnum(C) || C == '_' || C == '.';
  71 }