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2e1f51b8a5
instructions, and only instructions that take no operands at that! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15386 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.8 KiB
C++
49 lines
1.8 KiB
C++
//===- AsmWriterEmitter.cpp - Generate an assembly writer -----------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source 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 emits an assembly printer for the current target.
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// Note that this is currently fairly skeletal, but will grow over time.
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//
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//===----------------------------------------------------------------------===//
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#include "AsmWriterEmitter.h"
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#include "CodeGenTarget.h"
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#include <ostream>
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using namespace llvm;
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void AsmWriterEmitter::run(std::ostream &O) {
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EmitSourceFileHeader("Assembly Writer Source Fragment", O);
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CodeGenTarget Target;
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O <<
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"/// printInstruction - This method is automatically generated by tablegen\n"
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"/// from the instruction set description. This method returns true if the\n"
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"/// machine instruction was sufficiently described to print it, otherwise\n"
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"/// it returns false.\n"
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"bool " << Target.getName()
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<< "AsmPrinter::printInstruction(const MachineInstr *MI) {\n";
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O << " switch (MI->getOpcode()) {\n"
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" default: return false;\n";
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std::string Namespace = Target.inst_begin()->second.Namespace;
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for (CodeGenTarget::inst_iterator I = Target.inst_begin(),
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E = Target.inst_end(); I != E; ++I)
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if (!I->second.AsmString.empty()) {
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const std::string &AsmString = I->second.AsmString;
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O << " case " << Namespace << "::" << I->first << ": O << \""
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<< AsmString << "\" << '\\n'; break;\n";
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}
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O << " }\n"
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" return true;\n"
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"}\n";
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EmitSourceFileTail(O);
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}
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