LLVM  12.0.0git
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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 //===----------------------------------------------------------------------===//
14 #include "llvm/MC/MCAsmInfoCOFF.h"
15 #include "llvm/MC/MCDirectives.h"
17 using namespace llvm;
19 void MCAsmInfoCOFF::anchor() {}
22  // MingW 4.5 and later support .comm with log2 alignment, but .lcomm uses byte
23  // alignment.
28  WeakRefDirective = "\t.weak\t";
29  AvoidWeakIfComdat = true;
31  // Doesn't support visibility:
35  // Set up DWARF directives
39  // At least MSVC inline-asm does AShr.
40  UseLogicalShr = false;
42  // If this is a COFF target, assume that it supports associative comdats. It's
43  // part of the spec.
46  // We can generate constants in comdat sections that can be shared,
47  // but in order not to create null typed symbols, we actually need to
48  // make them global symbols as well.
50 }
52 void MCAsmInfoMicrosoft::anchor() {}
56 void MCAsmInfoGNUCOFF::anchor() {}
59  // If this is a GNU environment (mingw or cygwin), don't use associative
60  // comdats for jump tables, unwind information, and other data associated with
61  // a function.
64  // We don't create constants in comdat sections for MinGW.
65  HasCOFFComdatConstants = false;
66 }
bool HasSingleParameterDotFile
True if the target has a single parameter .file directive, this is true for ELF targets.
Definition: MCAsmInfo.h:300
LCOMM::LCOMMType LCOMMDirectiveAlignmentType
Describes if the .lcomm directive for the target supports an alignment argument and how it is interpr...
Definition: MCAsmInfo.h:288
This class represents lattice values for constants.
Definition: AllocatorList.h:23
Not a valid directive.
Definition: MCDirectives.h:19
linkonce if the symbol has a comdat *Defaults to false *bool AvoidWeakIfComdat
Definition: MCAsmInfo.h:332
bool HasDotTypeDotSizeDirective
True if the target has .type and .size directives, this is true for most ELF targets.
Definition: MCAsmInfo.h:296
bool UseLogicalShr
True if the integrated assembler should interpret 'a >> b' constant expressions as logical rather tha...
Definition: MCAsmInfo.h:399
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:336
bool COMMDirectiveAlignmentIsInBytes
True is .comm's and .lcomms optional alignment is to be specified in bytes instead of log2(n)...
Definition: MCAsmInfo.h:284
bool SupportsDebugInformation
True if target supports emission of debugging information.
Definition: MCAsmInfo.h:350
const char * WeakRefDirective
This directive, if non-null, is used to declare a global as being a weak undefined symbol...
Definition: MCAsmInfo.h:319
MCSymbolAttr ProtectedVisibilityAttr
This attribute, if not MCSA_Invalid, is used to declare a symbol as having protected visibility...
Definition: MCAsmInfo.h:344
bool NeedsDwarfSectionOffsetDirective
Definition: MCAsmInfo.h:240
MCSymbolAttr HiddenDeclarationVisibilityAttr
This attribute, if not MCSA_Invalid, is used to declare an undefined symbol as having hidden visibili...
Definition: MCAsmInfo.h:340
bool HasCOFFAssociativeComdats
True if this is a non-GNU COFF target.
Definition: MCAsmInfo.h:90