From c7e6e8d9a54e79ba12a966f96f0a7a7be106e0a1 Mon Sep 17 00:00:00 2001
From: Sameer Rahmani <lxsameer@gnu.org>
Date: Sat, 22 Jan 2022 19:10:57 +0000
Subject: [PATCH] Create a very basic tablegen instance

---
 include/serene/errors/errors.td               | 25 ++++++++++++++++++-
 tools/tbl-srn/CMakeLists.txt                  |  6 ++++-
 tools/tbl-srn/main.cpp                        | 20 +++++++++------
 tools/tbl-srn/{ => serene}/errors-backend.cpp |  8 ++++--
 tools/tbl-srn/{ => serene}/errors-backend.h   |  0
 5 files changed, 48 insertions(+), 11 deletions(-)
 rename tools/tbl-srn/{ => serene}/errors-backend.cpp (84%)
 rename tools/tbl-srn/{ => serene}/errors-backend.h (100%)

diff --git a/include/serene/errors/errors.td b/include/serene/errors/errors.td
index bfd4a27..fd765d1 100644
--- a/include/serene/errors/errors.td
+++ b/include/serene/errors/errors.td
@@ -1 +1,24 @@
-def Err;
+
+class Error<string _title = "", string _desc = ""> {
+      string title = _title;
+      string description = _desc;
+}
+
+def Err : Error<"Err1 titel"> {
+    let description = [{
+        err1
+        multiline
+        desc
+    }];
+}
+
+def Err2 : Error {
+    let title = "err 2 titel";
+    let description = "err2 desc";
+}
+
+def Err3 : Error<"err3", [{
+err3
+multiline
+desc
+}]>;
diff --git a/tools/tbl-srn/CMakeLists.txt b/tools/tbl-srn/CMakeLists.txt
index 97bbdd8..8958ef0 100644
--- a/tools/tbl-srn/CMakeLists.txt
+++ b/tools/tbl-srn/CMakeLists.txt
@@ -16,8 +16,12 @@
 
 set(LLVM_LINK_COMPONENTS Support TableGen)
 
+#TODO: Make sure that we don't include the project wide header files
+#      path here
+include_directories(${PROJECT_SOURCE_DIR}/tools/tbl-srn)
+
 add_executable(tbl-srn
-  errors-backend.cpp
+  serene/errors-backend.cpp
   main.cpp
 )
 
diff --git a/tools/tbl-srn/main.cpp b/tools/tbl-srn/main.cpp
index 4f2e411..31cf776 100644
--- a/tools/tbl-srn/main.cpp
+++ b/tools/tbl-srn/main.cpp
@@ -23,7 +23,7 @@
  * instances.
  */
 
-#include <errors-backend.h>
+#include "serene/errors-backend.h"
 
 #include <llvm/Support/CommandLine.h>
 #include <llvm/Support/InitLLVM.h>
@@ -34,19 +34,25 @@
 namespace cl = llvm::cl;
 
 namespace serene {
-enum ActionType { ErrorsBackend };
+enum ActionType { PrintRecords, ErrorsBackend };
 
-cl::opt<ActionType>
-    action(cl::desc("Action to perform:"),
-           cl::values(clEnumValN(
-               ErrorsBackend, "errors-backend",
-               "Generate a C++ file containing errors in the input file")));
+cl::opt<ActionType> action(
+    cl::desc("Action to perform:"),
+
+    cl::values(
+        clEnumValN(ErrorsBackend, "errors-backend",
+                   "Generate a C++ file containing errors in the input file"),
+        clEnumValN(PrintRecords, "print-records",
+                   "Print all records to stdout (default)")));
 
 bool llvmTableGenMain(llvm::raw_ostream &os, llvm::RecordKeeper &records) {
   switch (action) {
   case ErrorsBackend:
     emitErrors(records, os);
     break;
+  case PrintRecords:
+    os << records;
+    break;
   }
   return false;
 }
diff --git a/tools/tbl-srn/errors-backend.cpp b/tools/tbl-srn/serene/errors-backend.cpp
similarity index 84%
rename from tools/tbl-srn/errors-backend.cpp
rename to tools/tbl-srn/serene/errors-backend.cpp
index 3e0d206..d1252b6 100644
--- a/tools/tbl-srn/errors-backend.cpp
+++ b/tools/tbl-srn/serene/errors-backend.cpp
@@ -16,7 +16,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <errors-backend.h>
+// The "serene/" part is due to a convention that we use in the project
+#include "serene/errors-backend.h"
 
 #include <llvm/Support/Format.h>
 
@@ -39,7 +40,10 @@ public:
 
 void ErrorsBackend::run(llvm::raw_ostream &os) {
   llvm::emitSourceFileHeader("Serene's Errors collection", os);
-
+  for (const auto &classPair : records.getClasses()) {
+    llvm::Record *classRec = classPair.second.get();
+    os << classRec << "--\n";
+  }
   (void)records;
 }
 
diff --git a/tools/tbl-srn/errors-backend.h b/tools/tbl-srn/serene/errors-backend.h
similarity index 100%
rename from tools/tbl-srn/errors-backend.h
rename to tools/tbl-srn/serene/errors-backend.h