Sketch TableGen disassembler emitter, based on patch by Sean Callanan.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89833 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 66 insertions, 0 deletions

diff --git a/utils/TableGen/CMakeLists.txt b/utils/TableGen/CMakeLists.txt
index d9ec6f7d1a..daf8676826 100644
--- a/utils/TableGen/CMakeLists.txt
+++ b/utils/TableGen/CMakeLists.txt
@@ -8,6 +8,7 @@ add_executable(tblgen
   CodeGenInstruction.cpp
   CodeGenTarget.cpp
   DAGISelEmitter.cpp
+  DisassemblerEmitter.cpp
   FastISelEmitter.cpp
   InstrEnumEmitter.cpp
   InstrInfoEmitter.cpp
diff --git a/utils/TableGen/DisassemblerEmitter.cpp b/utils/TableGen/DisassemblerEmitter.cpp
new file mode 100644
index 0000000000..cc131257cf
--- /dev/null
+++ b/utils/TableGen/DisassemblerEmitter.cpp
@@ -0,0 +1,30 @@
+//===- DisassemblerEmitter.cpp - Generate a disassembler ------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "DisassemblerEmitter.h"
+#include "CodeGenTarget.h"
+#include "Record.h"
+using namespace llvm;
+
+void DisassemblerEmitter::run(raw_ostream &OS) {
+  CodeGenTarget Target;
+
+  OS << "/*===- TableGen'erated file "
+     << "---------------------------------------*- C -*-===*\n"
+     << " *\n"
+     << " * " << Target.getName() << " Disassembler\n"
+     << " *\n"
+     << " * Automatically generated file, do not edit!\n"
+     << " *\n"
+     << " *===---------------------------------------------------------------"
+     << "-------===*/\n";
+
+  throw TGError(Target.getTargetRecord()->getLoc(),
+                "Unable to generate disassembler for this target");
+}
diff --git a/utils/TableGen/DisassemblerEmitter.h b/utils/TableGen/DisassemblerEmitter.h
new file mode 100644
index 0000000000..7229d81649
--- /dev/null
+++ b/utils/TableGen/DisassemblerEmitter.h
@@ -0,0 +1,28 @@
+//===- DisassemblerEmitter.h - Disassembler Generator -----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef DISASSEMBLEREMITTER_H
+#define DISASSEMBLEREMITTER_H
+
+#include "TableGenBackend.h"
+
+namespace llvm {
+
+  class DisassemblerEmitter : public TableGenBackend {
+    RecordKeeper &Records;
+  public:
+    DisassemblerEmitter(RecordKeeper &R) : Records(R) {}
+
+    /// run - Output the disassembler.
+    void run(raw_ostream &o);
+  };
+
+} // end llvm namespace
+
+#endif
diff --git a/utils/TableGen/TableGen.cpp b/utils/TableGen/TableGen.cpp
index c6c4306295..7c8d288db9 100644
--- a/utils/TableGen/TableGen.cpp
+++ b/utils/TableGen/TableGen.cpp
@@ -21,6 +21,7 @@
 #include "ClangDiagnosticsEmitter.h"
 #include "CodeEmitterGen.h"
 #include "DAGISelEmitter.h"
+#include "DisassemblerEmitter.h"
 #include "FastISelEmitter.h"
 #include "InstrEnumEmitter.h"
 #include "InstrInfoEmitter.h"
@@ -46,6 +47,7 @@ enum ActionType {
   GenEmitter,
   GenRegisterEnums, GenRegister, GenRegisterHeader,
   GenInstrEnums, GenInstrs, GenAsmWriter, GenAsmMatcher,
+  GenDisassembler,
   GenCallingConv,
   GenClangDiagsDefs,
   GenClangDiagGroups,
@@ -80,6 +82,8 @@ namespace {
                                "Generate calling convention descriptions"),
                     clEnumValN(GenAsmWriter, "gen-asm-writer",
                                "Generate assembly writer"),
+                    clEnumValN(GenDisassembler, "gen-disassembler",
+                               "Generate disassembler"),
                     clEnumValN(GenAsmMatcher, "gen-asm-matcher",
                                "Generate assembly instruction matcher"),
                     clEnumValN(GenDAGISel, "gen-dag-isel",
@@ -228,6 +232,9 @@ int main(int argc, char **argv) {
     case GenClangDiagGroups:
       ClangDiagGroupsEmitter(Records).run(*Out);
       break;
+    case GenDisassembler:
+      DisassemblerEmitter(Records).run(*Out);
+      break;
     case GenOptParserDefs:
       OptParserEmitter(Records, true).run(*Out);
       break;