Stub out assembly matcher (.s -> MCInst) tblgen backend.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75378 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 64 insertions, 1 deletions

diff --git a/utils/TableGen/AsmMatcherEmitter.cpp b/utils/TableGen/AsmMatcherEmitter.cpp
new file mode 100644
index 0000000000..e0ee9443b9
--- /dev/null
+++ b/utils/TableGen/AsmMatcherEmitter.cpp
@@ -0,0 +1,24 @@
+//===- AsmMatcherEmitter.cpp - Generate an assembly matcher ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tablegen backend emits a target specifier matcher for converting parsed
+// assembly operands in the MCInst structures.
+//
+//===----------------------------------------------------------------------===//
+
+#include "AsmMatcherEmitter.h"
+#include "CodeGenTarget.h"
+#include "Record.h"
+using namespace llvm;
+
+void AsmMatcherEmitter::run(raw_ostream &O) {
+  EmitSourceFileHeader("Assembly Matcher Source Fragment", O);
+
+  CodeGenTarget Target;
+}
diff --git a/utils/TableGen/AsmMatcherEmitter.h b/utils/TableGen/AsmMatcherEmitter.h
new file mode 100644
index 0000000000..729c938fcd
--- /dev/null
+++ b/utils/TableGen/AsmMatcherEmitter.h
@@ -0,0 +1,33 @@
+//===- AsmMatcherEmitter.h - Generate an assembly matcher -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This tablegen backend emits a target specifier matcher for converting parsed
+// assembly operands in the MCInst structures.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ASMMATCHER_EMITTER_H
+#define ASMMATCHER_EMITTER_H
+
+#include "TableGenBackend.h"
+#include <map>
+#include <vector>
+#include <cassert>
+
+namespace llvm {
+  class AsmMatcherEmitter : public TableGenBackend {
+    RecordKeeper &Records;
+  public:
+    AsmMatcherEmitter(RecordKeeper &R) : Records(R) {}
+
+    // run - Output the matcher, returning true on failure.
+    void run(raw_ostream &o);
+  };
+}
+#endif
diff --git a/utils/TableGen/TableGen.cpp b/utils/TableGen/TableGen.cpp
index 90fba063c5..376bec1eb9 100644
--- a/utils/TableGen/TableGen.cpp
+++ b/utils/TableGen/TableGen.cpp
@@ -23,6 +23,7 @@
 #include "InstrInfoEmitter.h"
 #include "InstrEnumEmitter.h"
 #include "AsmWriterEmitter.h"
+#include "AsmMatcherEmitter.h"
 #include "DAGISelEmitter.h"
 #include "FastISelEmitter.h"
 #include "SubtargetEmitter.h"
@@ -43,7 +44,7 @@ enum ActionType {
   PrintRecords,
   GenEmitter,
   GenRegisterEnums, GenRegister, GenRegisterHeader,
-  GenInstrEnums, GenInstrs, GenAsmWriter,
+  GenInstrEnums, GenInstrs, GenAsmWriter, GenAsmMatcher,
   GenCallingConv,
   GenClangDiagsDefs,
   GenClangDiagGroups,
@@ -77,6 +78,8 @@ namespace {
                                "Generate calling convention descriptions"),
                     clEnumValN(GenAsmWriter, "gen-asm-writer",
                                "Generate assembly writer"),
+                    clEnumValN(GenAsmMatcher, "gen-asm-matcher",
+                               "Generate assembly instruction matcher"),
                     clEnumValN(GenDAGISel, "gen-dag-isel",
                                "Generate a DAG instruction selector"),
                     clEnumValN(GenFastISel, "gen-fast-isel",
@@ -210,6 +213,9 @@ int main(int argc, char **argv) {
     case GenAsmWriter:
       AsmWriterEmitter(Records).run(*Out);
       break;
+    case GenAsmMatcher:
+      AsmMatcherEmitter(Records).run(*Out);
+      break;
     case GenClangDiagsDefs:
       ClangDiagsDefsEmitter(Records, ClangComponent).run(*Out);
       break;