MLIR: #1 CMake Modifications to allow MLIR Support

MLIR: #2 CMake - Adding FindMLIR.cmake
MLIR: #3 CMake - Updating FindMLIR
MLIR: #4 CMake - Updating Path 
MLIR: #5 CMake - Adding MLIRLibs
MLIR: #6 CMake - Supporting Dialect on FindMLIR
MLIR: #7 CMake - Adding Message of Ops.ts
MLIR: ldc-developers#8 CMake - Removing duplicated messages
MLIR: ldc-developers#9 CMake: Updating paths and setting libs
MLIR: ldc-developers#10 CMake - Removing duplicated MLIR Headers
Make MLIR optional, use MLIR_LIBRARIES

CMakeLists.txt

@@ -348,6 +348,27 @@ endif()
 message(STATUS "LDC version identifier: ${LDC_VERSION}")
 configure_file(driver/ldc-version.cpp.in driver/ldc-version.cpp)
 
+#
+# Setting MLIR headers
+#
+
+find_package(MLIR)
+if(MLIR_FOUND)
+    message(STATUS "Buiding with MLIR support")
+    include_directories(${MLIR_ROOT_DIR})
+    include_directories(${MLIR_INCLUDE_DIRS})
+    include_directories(${MLIR_BUILD_INCLUDE_DIRS})
+    include_directories(${MLIR_LIB_DIRS})
+    add_definitions("-DLDC_MLIR_ENABLED")
+
+    set(LLVM_LINK_COMPONENTS
+        Support
+    )
+
+set(LLVM_LIBRARIES "${MLIR_LIBRARIES}" ${LLVM_LIBRARIES})
+
+endif() #if MLIR_FOUND
+
 # Also add the header files to the build so that they are available in IDE
 # project files generated via CMake.
 file(GLOB_RECURSE FE_SRC_D dmd/*.d)

cmake/Modules/FindMLIR.cmake

@@ -0,0 +1,68 @@
+# - Try to find MLIR project at LLVM
+#
+# The following are set after configuration is done:
+#   MLIR_FOUND
+#   MLIR_ROOT_DIRS
+#   MLIR_INCLUDE_DIRS
+#   MLIR_BUILD_INCLUDE_DIR
+project(ldc)
+
+find_path(MLIR_ROOT_DIR NAMES "LICENSE.TXT" HINTS ${LLVM_ROOT_DIR}/../mlir)
+
+#Used to get the main header files
+find_path(MLIR_INCLUDE_DIR NAMES "Parser.h" HINTS ${MLIR_ROOT_DIR}/include/mlir)
+
+#Lib directories
+find_path(MLIR_LIB_DIR NAMES "CMakeLists.txt" HINTS ${MLIR_ROOT_DIR}/lib/IR)
+
+#Used to get StandardOps.h.inc
+find_path(MLIR_BUILD_INCLUDE_DIR NAMES "cmake_install.cmake"
+        HINTS ${LLVM_ROOT_DIR}/tools/mlir/include/mlir)
+
+message(STATUS "MLIR Dir: ${MLIR_ROOT_DIR}")
+message(STATUS "MLIR Include Dir: ${MLIR_INCLUDE_DIR}/..")
+message(STATUS "MLIR Lib Dir: ${MLIR_LIB_DIR}/..")
+message(STATUS "MLIR Build Include Dir: ${MLIR_BUILD_INCLUDE_DIR}/..")
+
+set(MLIR_ROOT_DIRS ${MLIR_ROOT_DIR})
+set(MLIR_INCLUDE_DIRS ${MLIR_INCLUDE_DIR}/..)
+set(MLIR_BUILD_INCLUDE_DIRS ${MLIR_BUILD_INCLUDE_DIR}/..)
+set(MLIR_LIB_DIRS ${MLIR_LIB_DIR}/..)
+
+if(EXISTS ${MLIR_ROOT_DIR})
+#Resources to automatically generate Ops.h.inc and Ops.cpp.inc, assuming that
+#mlir-tblgen is already built and is on the usual directory at llvm dir
+set(MLIR_MAIN_SRC_DIR ${MLIR_INCLUDE_DIR}/.. )
+set(MLIR_TABLEGEN_EXE ${LLVM_ROOT_DIR}/bin/mlir-tblgen)
+set(MLIR_INCLUDE_DIR ${MLIR_BUILD_INCLUDE_DIR}/..)
+
+function(mlir_tablegen)
+    cmake_parse_arguments(
+     ARG
+     "NAME"
+     "TARGET;OUTS;FLAG;SRCS"
+     ${ARGN}
+     )
+
+    MESSAGE(STATUS "Setting target for Ops_" ${ARG_TARGET})
+
+    set(TABLEGEN_OUTPUT ${TABLEGEN_OUTPUT} ${CMAKE_CURRENT_SOURCE_DIR}/${ARG_SRCS}
+            PARENT_SCOPE)
+    #mlir-tblgen ops.td --gen-op-* -I*-o=ops.*.inc
+    add_custom_command(
+            OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/${ARG_OUTS}
+            COMMAND ${MLIR_TABLEGEN_EXE} ${CMAKE_CURRENT_SOURCE_DIR}/${ARG_SRCS} -I${MLIR_MAIN_SRC_DIR} -I${MLIR_INCLUDE_DIR}  -o=${CMAKE_CURRENT_SOURCE_DIR}/${ARG_OUTS}
+            ARGS ${ARG_FLAG}
+    )
+    add_custom_target(Ops_${ARG_TARGET} ALL DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${ARG_OUTS})
+endfunction()
+
+# Handle the QUIETLY and REQUIRED arguments and set the MLIR_FOUND to TRUE
+# if all listed variables are TRUE
+include(FindPackageHandleStandardArgs)
+
+find_package_handle_standard_args(MLIR DEFAULT_MSG MLIR_ROOT_DIRS MLIR_INCLUDE_DIRS
+                                            MLIR_BUILD_INCLUDE_DIRS MLIR_LIB_DIRS)
+
+mark_as_advanced(MLIR_ROOT_DIRS MLIR_INCLUDE_DIRS MLIR_BUILD_INCLUDE_DIRS MLIR_LIB_DIRS)
+endif()