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7520e3a2b5
InstAlias<{alias}, {aliasee}>;
The InstAlias instruction should be able to go from the MCInst to the
{alias}. All of the information is there to match the MCInst with the
{aliasee}. From there, it's a simple matter to emit the {alias}, with the
correct operands from the {aliasee}.
The code this patch generates can be used by the InstPrinter to automatically
print out the alias without having to write special C++ code to handle the
situation.
This is a WIP, and therefore are several limitations. For instance, it cannot
handle AsmOperands at the moment. It also doesn't know what to do when two
{alias}es match the same {aliasee}. (Currently, it just ignores those two cases
and allows the printInstruction method to handle them.)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126538 91177308-0d34-0410-b5e6-96231b3b80d8
56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
//===- AsmWriterEmitter.h - Generate an assembly writer ---------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This tablegen backend is responsible for emitting an assembly printer for the
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// code generator.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ASMWRITER_EMITTER_H
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#define ASMWRITER_EMITTER_H
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#include "TableGenBackend.h"
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#include <map>
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#include <vector>
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#include <cassert>
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namespace llvm {
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class AsmWriterInst;
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class CodeGenInstruction;
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class AsmWriterEmitter : public TableGenBackend {
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RecordKeeper &Records;
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std::map<const CodeGenInstruction*, AsmWriterInst*> CGIAWIMap;
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std::vector<const CodeGenInstruction*> NumberedInstructions;
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public:
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AsmWriterEmitter(RecordKeeper &R) : Records(R) {}
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// run - Output the asmwriter, returning true on failure.
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void run(raw_ostream &o);
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private:
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void EmitPrintInstruction(raw_ostream &o);
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void EmitGetRegisterName(raw_ostream &o);
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void EmitGetInstructionName(raw_ostream &o);
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void EmitPrintAliasInstruction(raw_ostream &O);
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AsmWriterInst *getAsmWriterInstByID(unsigned ID) const {
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assert(ID < NumberedInstructions.size());
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std::map<const CodeGenInstruction*, AsmWriterInst*>::const_iterator I =
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CGIAWIMap.find(NumberedInstructions[ID]);
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assert(I != CGIAWIMap.end() && "Didn't find inst!");
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return I->second;
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}
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void FindUniqueOperandCommands(std::vector<std::string> &UOC,
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std::vector<unsigned> &InstIdxs,
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std::vector<unsigned> &InstOpsUsed) const;
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};
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}
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#endif
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