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49cf4f2457
Follow up from D92955 and D83636. This patch makes the base cpp files OMP.cpp and ACC.cpp normal files and they now include the XXX.inc file generated by tablegen. This reduces the number of file generated by the DirectiveEmitter backend and makes it closer to the proposal in D83636. Reviewed By: Meinersbur Differential Revision: https://reviews.llvm.org/D93560
100 lines
4.6 KiB
C++
100 lines
4.6 KiB
C++
//===- TableGenBackends.h - Declarations for LLVM TableGen Backends -------===//
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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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//
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// This file contains the declarations for all of the LLVM TableGen
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// backends. A "TableGen backend" is just a function. See below for a
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// precise description.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_UTILS_TABLEGEN_TABLEGENBACKENDS_H
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#define LLVM_UTILS_TABLEGEN_TABLEGENBACKENDS_H
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// A TableGen backend is a function that looks like
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//
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// EmitFoo(RecordKeeper &RK, raw_ostream &OS /*, anything else you need */ )
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//
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// What you do inside of that function is up to you, but it will usually
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// involve generating C++ code to the provided raw_ostream.
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//
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// The RecordKeeper is just a top-level container for an in-memory
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// representation of the data encoded in the TableGen file. What a TableGen
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// backend does is walk around that in-memory representation and generate
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// stuff based on the information it contains.
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//
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// The in-memory representation is a node-graph (think of it like JSON but
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// with a richer ontology of types), where the nodes are subclasses of
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// Record. The methods `getClass`, `getDef` are the basic interface to
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// access the node-graph. RecordKeeper also provides a handy method
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// `getAllDerivedDefinitions`. Consult "include/llvm/TableGen/Record.h" for
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// the exact interfaces provided by Record's and RecordKeeper.
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//
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// A common pattern for TableGen backends is for the EmitFoo function to
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// instantiate a class which holds some context for the generation process,
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// and then have most of the work happen in that class's methods. This
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// pattern partly has historical roots in the previous TableGen backend API
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// that involved a class and an invocation like `FooEmitter(RK).run(OS)`.
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//
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// Remember to wrap private things in an anonymous namespace. For most
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// backends, this means that the EmitFoo function is the only thing not in
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// the anonymous namespace.
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// FIXME: Reorganize TableGen so that build dependencies can be more
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// accurately expressed. Currently, touching any of the emitters (or
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// anything that they transitively depend on) causes everything dependent
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// on TableGen to be rebuilt (this includes all the targets!). Perhaps have
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// a standalone TableGen binary and have the backends be loadable modules
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// of some sort; then the dependency could be expressed as being on the
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// module, and all the modules would have a common dependency on the
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// TableGen binary with as few dependencies as possible on the rest of
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// LLVM.
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namespace llvm {
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class raw_ostream;
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class RecordKeeper;
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void EmitIntrinsicEnums(RecordKeeper &RK, raw_ostream &OS);
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void EmitIntrinsicImpl(RecordKeeper &RK, raw_ostream &OS);
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void EmitAsmMatcher(RecordKeeper &RK, raw_ostream &OS);
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void EmitAsmWriter(RecordKeeper &RK, raw_ostream &OS);
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void EmitCallingConv(RecordKeeper &RK, raw_ostream &OS);
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void EmitCodeEmitter(RecordKeeper &RK, raw_ostream &OS);
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void EmitCodeBeads(RecordKeeper &RK, raw_ostream &OS);
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void EmitDAGISel(RecordKeeper &RK, raw_ostream &OS);
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void EmitDFAPacketizer(RecordKeeper &RK, raw_ostream &OS);
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void EmitDisassembler(RecordKeeper &RK, raw_ostream &OS);
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void EmitFastISel(RecordKeeper &RK, raw_ostream &OS);
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void EmitInstrInfo(RecordKeeper &RK, raw_ostream &OS);
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void EmitInstrDocs(RecordKeeper &RK, raw_ostream &OS);
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void EmitPseudoLowering(RecordKeeper &RK, raw_ostream &OS);
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void EmitCompressInst(RecordKeeper &RK, raw_ostream &OS);
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void EmitRegisterInfo(RecordKeeper &RK, raw_ostream &OS);
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void EmitSubtarget(RecordKeeper &RK, raw_ostream &OS);
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void EmitMapTable(RecordKeeper &RK, raw_ostream &OS);
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void EmitOptParser(RecordKeeper &RK, raw_ostream &OS);
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void EmitOptRST(RecordKeeper &RK, raw_ostream &OS);
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void EmitCTags(RecordKeeper &RK, raw_ostream &OS);
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void EmitAttributes(RecordKeeper &RK, raw_ostream &OS);
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void EmitSearchableTables(RecordKeeper &RK, raw_ostream &OS);
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void EmitGlobalISel(RecordKeeper &RK, raw_ostream &OS);
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void EmitGICombiner(RecordKeeper &RK, raw_ostream &OS);
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void EmitX86EVEX2VEXTables(RecordKeeper &RK, raw_ostream &OS);
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void EmitX86FoldTables(RecordKeeper &RK, raw_ostream &OS);
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void EmitRegisterBank(RecordKeeper &RK, raw_ostream &OS);
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void EmitExegesis(RecordKeeper &RK, raw_ostream &OS);
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void EmitAutomata(RecordKeeper &RK, raw_ostream &OS);
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void EmitDirectivesDecl(RecordKeeper &RK, raw_ostream &OS);
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void EmitDirectivesImpl(RecordKeeper &RK, raw_ostream &OS);
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} // End llvm namespace
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#endif
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