Line data    Source code

       1             : //===- MCAsmInfoCOFF.cpp - COFF asm properties ----------------------------===//
       2             : //
       3             : //                     The LLVM Compiler Infrastructure
       4             : //
       5             : // This file is distributed under the University of Illinois Open Source
       6             : // License. See LICENSE.TXT for details.
       7             : //
       8             : //===----------------------------------------------------------------------===//
       9             : //
      10             : // This file defines target asm properties related what form asm statements
      11             : // should take in general on COFF-based targets
      12             : //
      13             : //===----------------------------------------------------------------------===//
      14             : 
      15             : #include "llvm/MC/MCAsmInfoCOFF.h"
      16             : #include "llvm/MC/MCDirectives.h"
      17             : 
      18             : using namespace llvm;
      19             : 
      20           0 : void MCAsmInfoCOFF::anchor() {}
      21             : 
      22        1857 : MCAsmInfoCOFF::MCAsmInfoCOFF() {
      23             :   // MingW 4.5 and later support .comm with log2 alignment, but .lcomm uses byte
      24             :   // alignment.
      25        1857 :   COMMDirectiveAlignmentIsInBytes = false;
      26        1857 :   LCOMMDirectiveAlignmentType = LCOMM::ByteAlignment;
      27        1857 :   HasDotTypeDotSizeDirective = false;
      28        1857 :   HasSingleParameterDotFile = false;
      29        1857 :   WeakRefDirective = "\t.weak\t";
      30        1857 :   HasLinkOnceDirective = true;
      31             : 
      32             :   // Doesn't support visibility:
      33        1857 :   HiddenVisibilityAttr = HiddenDeclarationVisibilityAttr = MCSA_Invalid;
      34        1857 :   ProtectedVisibilityAttr = MCSA_Invalid;
      35             : 
      36             :   // Set up DWARF directives
      37        1857 :   SupportsDebugInformation = true;
      38        1857 :   NeedsDwarfSectionOffsetDirective = true;
      39             : 
      40        1857 :   UseIntegratedAssembler = true;
      41             : 
      42             :   // At least MSVC inline-asm does AShr.
      43        1857 :   UseLogicalShr = false;
      44             : 
      45             :   // If this is a COFF target, assume that it supports associative comdats. It's
      46             :   // part of the spec.
      47        1857 :   HasCOFFAssociativeComdats = true;
      48             : 
      49             :   // We can generate constants in comdat sections that can be shared,
      50             :   // but in order not to create null typed symbols, we actually need to
      51             :   // make them global symbols as well.
      52        1857 :   HasCOFFComdatConstants = true;
      53        1857 : }
      54             : 
      55           0 : void MCAsmInfoMicrosoft::anchor() {}
      56             : 
      57             : MCAsmInfoMicrosoft::MCAsmInfoMicrosoft() = default;
      58             : 
      59           0 : void MCAsmInfoGNUCOFF::anchor() {}
      60             : 
      61         374 : MCAsmInfoGNUCOFF::MCAsmInfoGNUCOFF() {
      62             :   // If this is a GNU environment (mingw or cygwin), don't use associative
      63             :   // comdats for jump tables, unwind information, and other data associated with
      64             :   // a function.
      65         374 :   HasCOFFAssociativeComdats = false;
      66             : 
      67             :   // We don't create constants in comdat sections for MinGW.
      68         374 :   HasCOFFComdatConstants = false;
      69         374 : }