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llvm-mirror/lib/MC/MCAsmInfoCOFF.cpp
Chandler Carruth ae65e281f3 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00

69 lines
2.2 KiB
C++

//===- MCAsmInfoCOFF.cpp - COFF asm properties ----------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines target asm properties related what form asm statements
// should take in general on COFF-based targets
//
//===----------------------------------------------------------------------===//
#include "llvm/MC/MCAsmInfoCOFF.h"
#include "llvm/MC/MCDirectives.h"
using namespace llvm;
void MCAsmInfoCOFF::anchor() {}
MCAsmInfoCOFF::MCAsmInfoCOFF() {
// MingW 4.5 and later support .comm with log2 alignment, but .lcomm uses byte
// alignment.
COMMDirectiveAlignmentIsInBytes = false;
LCOMMDirectiveAlignmentType = LCOMM::ByteAlignment;
HasDotTypeDotSizeDirective = false;
HasSingleParameterDotFile = true;
WeakRefDirective = "\t.weak\t";
HasLinkOnceDirective = true;
// Doesn't support visibility:
HiddenVisibilityAttr = HiddenDeclarationVisibilityAttr = MCSA_Invalid;
ProtectedVisibilityAttr = MCSA_Invalid;
// Set up DWARF directives
SupportsDebugInformation = true;
NeedsDwarfSectionOffsetDirective = true;
UseIntegratedAssembler = true;
// At least MSVC inline-asm does AShr.
UseLogicalShr = false;
// If this is a COFF target, assume that it supports associative comdats. It's
// part of the spec.
HasCOFFAssociativeComdats = true;
// We can generate constants in comdat sections that can be shared,
// but in order not to create null typed symbols, we actually need to
// make them global symbols as well.
HasCOFFComdatConstants = true;
}
void MCAsmInfoMicrosoft::anchor() {}
MCAsmInfoMicrosoft::MCAsmInfoMicrosoft() = default;
void MCAsmInfoGNUCOFF::anchor() {}
MCAsmInfoGNUCOFF::MCAsmInfoGNUCOFF() {
// If this is a GNU environment (mingw or cygwin), don't use associative
// comdats for jump tables, unwind information, and other data associated with
// a function.
HasCOFFAssociativeComdats = false;
// We don't create constants in comdat sections for MinGW.
HasCOFFComdatConstants = false;
}