| 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 | |
| 21 | MCAsmInfoCOFF::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 | |
| 52 | void MCAsmInfoMicrosoft::anchor() {} |
| 53 | |
| 54 | MCAsmInfoMicrosoft::MCAsmInfoMicrosoft() = default; |
| 55 | |
| 56 | void MCAsmInfoGNUCOFF::anchor() {} |
| 57 | |
| 58 | MCAsmInfoGNUCOFF::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 |