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author | Chris Lattner <sabre@nondot.org> | 2004-08-01 05:59:33 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2004-08-01 05:59:33 +0000 |
commit | 2e1f51b8a583649d74cb666ca5e4cf680cc1ced9 (patch) | |
tree | 9d3918655c2d43639de8e63e519beb837528ba00 /utils/TableGen/AsmWriterEmitter.cpp | |
parent | ec3524064c57fbc2c5976ca301bbaadc94006d07 (diff) | |
download | external_llvm-2e1f51b8a583649d74cb666ca5e4cf680cc1ced9.zip external_llvm-2e1f51b8a583649d74cb666ca5e4cf680cc1ced9.tar.gz external_llvm-2e1f51b8a583649d74cb666ca5e4cf680cc1ced9.tar.bz2 |
Initial cut at an asm writer emitter. So far, this only handles emission of
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
Diffstat (limited to 'utils/TableGen/AsmWriterEmitter.cpp')
-rw-r--r-- | utils/TableGen/AsmWriterEmitter.cpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/utils/TableGen/AsmWriterEmitter.cpp b/utils/TableGen/AsmWriterEmitter.cpp new file mode 100644 index 0000000..b2cf107 --- /dev/null +++ b/utils/TableGen/AsmWriterEmitter.cpp @@ -0,0 +1,48 @@ +//===- AsmWriterEmitter.cpp - Generate an assembly writer -----------------===// +// +// The LLVM Compiler Infrastructure +// +// This file was developed by the LLVM research group and is distributed under +// the University of Illinois Open Source License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This tablegen backend is emits an assembly printer for the current target. +// Note that this is currently fairly skeletal, but will grow over time. +// +//===----------------------------------------------------------------------===// + +#include "AsmWriterEmitter.h" +#include "CodeGenTarget.h" +#include <ostream> +using namespace llvm; + +void AsmWriterEmitter::run(std::ostream &O) { + EmitSourceFileHeader("Assembly Writer Source Fragment", O); + + CodeGenTarget Target; + O << + "/// printInstruction - This method is automatically generated by tablegen\n" + "/// from the instruction set description. This method returns true if the\n" + "/// machine instruction was sufficiently described to print it, otherwise\n" + "/// it returns false.\n" + "bool " << Target.getName() + << "AsmPrinter::printInstruction(const MachineInstr *MI) {\n"; + O << " switch (MI->getOpcode()) {\n" + " default: return false;\n"; + + std::string Namespace = Target.inst_begin()->second.Namespace; + + for (CodeGenTarget::inst_iterator I = Target.inst_begin(), + E = Target.inst_end(); I != E; ++I) + if (!I->second.AsmString.empty()) { + const std::string &AsmString = I->second.AsmString; + O << " case " << Namespace << "::" << I->first << ": O << \"" + << AsmString << "\" << '\\n'; break;\n"; + } + + O << " }\n" + " return true;\n" + "}\n"; + EmitSourceFileTail(O); +} |