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
17using namespace llvm;
18
19void MCAsmInfoCOFF::anchor() {}
20
21MCAsmInfoCOFF::MCAsmInfoCOFF() {
22  // MingW 4.5 and later support .comm with log2 alignment, but .lcomm uses byte
23  // alignment.
24  COMMDirectiveAlignmentIsInBytes = false;
25  LCOMMDirectiveAlignmentType = LCOMM::ByteAlignment;
26  HasDotTypeDotSizeDirective = false;
27  HasSingleParameterDotFile = true;
28  WeakRefDirective = "\t.weak\t";
29  AvoidWeakIfComdat = true;
30
31  // Doesn't support visibility:
32  HiddenVisibilityAttr = HiddenDeclarationVisibilityAttr = MCSA_Invalid;
33  ProtectedVisibilityAttr = MCSA_Invalid;
34
35  // Set up DWARF directives
36  SupportsDebugInformation = true;
37  NeedsDwarfSectionOffsetDirective = true;
38
39  // At least MSVC inline-asm does AShr.
40  UseLogicalShr = false;
41
42  // If this is a COFF target, assume that it supports associative comdats. It's
43  // part of the spec.
44  HasCOFFAssociativeComdats = true;
45
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.
49  HasCOFFComdatConstants = true;
50}
51
52void MCAsmInfoMicrosoft::anchor() {}
53
54MCAsmInfoMicrosoft::MCAsmInfoMicrosoft() = default;
55
56void MCAsmInfoGNUCOFF::anchor() {}
57
58MCAsmInfoGNUCOFF::MCAsmInfoGNUCOFF() {
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.
62  HasCOFFAssociativeComdats = false;
63
64  // We don't create constants in comdat sections for MinGW.
65  HasCOFFComdatConstants = false;
66}
67