1b41599cf8
The .syntax unified directive and .codeX/.code X directives are, other than some simple common printing code, exclusively implemented in the targets themselves. Thus, remove the corresponding MCAF_* flags and reimplement the directives solely within the targets. This avoids exposing all targets to all other targets' flags. Since MCAF_SubsectionsViaSymbols is all that remains, convert it to its own function like other directives, simplifying its implementation. Note that, on X86, we now always need a target streamer when parsing assembly, as it's now used for directives that aren't COFF-specific. It still does not however need to do anything when producing a non-COFF object file, so this commit does not introduce any new target streamers. There is some churn in test output, and corresponding UTC regex changes, due to comments no longer being flushed by these various directives (and EmitEOL is not exposed outside MCAsmStreamer.cpp so we couldn't do so even if we wanted to), but that was a bit odd to be doing anyway. This is motivated by Morello LLVM, which adds yet another assembler flag to distinguish A64 and C64 instruction sets, but did not update every switch and so emits warnings during the build. Rather than fix those warnings it seems better to instead make the problem not exist in the first place via this change.
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
//===- lib/MC/MCNullStreamer.cpp - Dummy Streamer Implementation ----------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringRef.h"
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#include "llvm/MC/MCDirectives.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/Support/SMLoc.h"
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namespace llvm {
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class MCContext;
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class MCExpr;
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class MCSection;
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class MCSymbol;
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} // namespace llvm
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using namespace llvm;
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namespace {
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class MCNullStreamer : public MCStreamer {
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public:
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MCNullStreamer(MCContext &Context) : MCStreamer(Context) {}
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/// @name MCStreamer Interface
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/// @{
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bool hasRawTextSupport() const override { return true; }
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void emitRawTextImpl(StringRef String) override {}
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bool emitSymbolAttribute(MCSymbol *Symbol,
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MCSymbolAttr Attribute) override {
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return true;
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}
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void emitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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Align ByteAlignment) override {}
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void emitSubsectionsViaSymbols() override {};
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void beginCOFFSymbolDef(const MCSymbol *Symbol) override {}
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void emitCOFFSymbolStorageClass(int StorageClass) override {}
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void emitCOFFSymbolType(int Type) override {}
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void endCOFFSymbolDef() override {}
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void
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emitXCOFFSymbolLinkageWithVisibility(MCSymbol *Symbol, MCSymbolAttr Linkage,
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MCSymbolAttr Visibility) override {}
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};
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}
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MCStreamer *llvm::createNullStreamer(MCContext &Context) {
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return new MCNullStreamer(Context);
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}
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