LLVM  10.0.0svn
MCAsmInfoCOFF.cpp
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1 //===- MCAsmInfoCOFF.cpp - COFF asm properties ----------------------------===//
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 // This file defines target asm properties related what form asm statements
10 // should take in general on COFF-based targets
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "llvm/MC/MCAsmInfoCOFF.h"
15 #include "llvm/MC/MCDirectives.h"
16 
17 using namespace llvm;
18 
19 void MCAsmInfoCOFF::anchor() {}
20 
22  // MingW 4.5 and later support .comm with log2 alignment, but .lcomm uses byte
23  // alignment.
28  WeakRefDirective = "\t.weak\t";
29  HasLinkOnceDirective = true;
30 
31  // Doesn't support visibility:
34 
35  // Set up DWARF directives
38 
40 
41  // At least MSVC inline-asm does AShr.
42  UseLogicalShr = false;
43 
44  // If this is a COFF target, assume that it supports associative comdats. It's
45  // part of the spec.
47 
48  // We can generate constants in comdat sections that can be shared,
49  // but in order not to create null typed symbols, we actually need to
50  // make them global symbols as well.
52 }
53 
54 void MCAsmInfoMicrosoft::anchor() {}
55 
57 
58 void MCAsmInfoGNUCOFF::anchor() {}
59 
61  // If this is a GNU environment (mingw or cygwin), don't use associative
62  // comdats for jump tables, unwind information, and other data associated with
63  // a function.
65 
66  // We don't create constants in comdat sections for MinGW.
67  HasCOFFComdatConstants = false;
68 }
bool HasSingleParameterDotFile
True if the target has a single parameter .file directive, this is true for ELF targets.
Definition: MCAsmInfo.h:287
LCOMM::LCOMMType LCOMMDirectiveAlignmentType
Describes if the .lcomm directive for the target supports an alignment argument and how it is interpr...
Definition: MCAsmInfo.h:275
bool UseIntegratedAssembler
Should we use the integrated assembler? The integrated assembler should be enabled by default (by the...
Definition: MCAsmInfo.h:375
This class represents lattice values for constants.
Definition: AllocatorList.h:23
Not a valid directive.
Definition: MCDirectives.h:19
bool HasDotTypeDotSizeDirective
True if the target has .type and .size directives, this is true for most ELF targets.
Definition: MCAsmInfo.h:283
bool UseLogicalShr
True if the integrated assembler should interpret 'a >> b' constant expressions as logical rather tha...
Definition: MCAsmInfo.h:385
bool HasCOFFComdatConstants
True if this is a non-GNU COFF target.
Definition: MCAsmInfo.h:94
MCSymbolAttr HiddenVisibilityAttr
This attribute, if not MCSA_Invalid, is used to declare a symbol as having hidden visibility...
Definition: MCAsmInfo.h:322
bool HasLinkOnceDirective
True if we have a .linkonce directive.
Definition: MCAsmInfo.h:318
bool COMMDirectiveAlignmentIsInBytes
True is .comm's and .lcomms optional alignment is to be specified in bytes instead of log2(n)...
Definition: MCAsmInfo.h:271
bool SupportsDebugInformation
True if target supports emission of debugging information.
Definition: MCAsmInfo.h:336
const char * WeakRefDirective
This directive, if non-null, is used to declare a global as being a weak undefined symbol...
Definition: MCAsmInfo.h:306
MCSymbolAttr ProtectedVisibilityAttr
This attribute, if not MCSA_Invalid, is used to declare a symbol as having protected visibility...
Definition: MCAsmInfo.h:330
bool NeedsDwarfSectionOffsetDirective
Definition: MCAsmInfo.h:227
MCSymbolAttr HiddenDeclarationVisibilityAttr
This attribute, if not MCSA_Invalid, is used to declare an undefined symbol as having hidden visibili...
Definition: MCAsmInfo.h:326
bool HasCOFFAssociativeComdats
True if this is a non-GNU COFF target.
Definition: MCAsmInfo.h:90