[cmake] Some NFC changes in preparation for accomodating `Ninja Multi-Config`

* Use `MATCHES` so that `Ninja Multi-Config` generator also satisfies the Ninja check
* Pull out a couple of values into variables, inside `function(tablegen project ofn)`, NFC

Differential Revision: https://reviews.llvm.org/D118100

llvm/cmake/config-ix.cmake

@@ -602,7 +602,7 @@ find_program(GOLD_EXECUTABLE NAMES ${LLVM_DEFAULT_TARGET_TRIPLE}-ld.gold ld.gold
 set(LLVM_BINUTILS_INCDIR "" CACHE PATH
     "PATH to binutils/include containing plugin-api.h for gold plugin.")
 
-if(CMAKE_GENERATOR STREQUAL "Ninja")
+if(CMAKE_GENERATOR MATCHES "Ninja")
   execute_process(COMMAND ${CMAKE_MAKE_PROGRAM} --version
     OUTPUT_VARIABLE NINJA_VERSION
     OUTPUT_STRIP_TRAILING_WHITESPACE)
@@ -610,7 +610,7 @@ if(CMAKE_GENERATOR STREQUAL "Ninja")
   message(STATUS "Ninja version: ${NINJA_VERSION}")
 endif()
 
-if(CMAKE_GENERATOR STREQUAL "Ninja" AND
+if(CMAKE_GENERATOR MATCHES "Ninja" AND
     NOT "${NINJA_VERSION}" VERSION_LESS "1.9.0" AND
     CMAKE_HOST_APPLE AND CMAKE_HOST_SYSTEM_VERSION VERSION_GREATER "15.6.0")
   set(LLVM_TOUCH_STATIC_LIBRARIES ON)

llvm/cmake/modules/HandleLLVMOptions.cmake

@@ -34,7 +34,7 @@ string(TOUPPER "${LLVM_ENABLE_LTO}" uppercase_LLVM_ENABLE_LTO)
 set(LLVM_PARALLEL_COMPILE_JOBS "" CACHE STRING
   "Define the maximum number of concurrent compilation jobs (Ninja only).")
 if(LLVM_PARALLEL_COMPILE_JOBS)
-  if(NOT CMAKE_GENERATOR STREQUAL "Ninja")
+  if(NOT CMAKE_GENERATOR MATCHES "Ninja")
     message(WARNING "Job pooling is only available with Ninja generators.")
   else()
     set_property(GLOBAL APPEND PROPERTY JOB_POOLS compile_job_pool=${LLVM_PARALLEL_COMPILE_JOBS})
@@ -44,7 +44,7 @@ endif()
 
 set(LLVM_PARALLEL_LINK_JOBS "" CACHE STRING
   "Define the maximum number of concurrent link jobs (Ninja only).")
-if(CMAKE_GENERATOR STREQUAL "Ninja")
+if(CMAKE_GENERATOR MATCHES "Ninja")
   if(NOT LLVM_PARALLEL_LINK_JOBS AND uppercase_LLVM_ENABLE_LTO STREQUAL "THIN")
     message(STATUS "ThinLTO provides its own parallel linking - limiting parallel link jobs to 2.")
     set(LLVM_PARALLEL_LINK_JOBS "2")
@@ -920,7 +920,7 @@ add_definitions( -D__STDC_LIMIT_MACROS )
 
 # clang and gcc don't default-print colored diagnostics when invoked from Ninja.
 if (UNIX AND
-    CMAKE_GENERATOR STREQUAL "Ninja" AND
+    CMAKE_GENERATOR MATCHES "Ninja" AND
     (CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR
      (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND
       NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9))))
@@ -928,7 +928,7 @@ if (UNIX AND
 endif()
 
 # lld doesn't print colored diagnostics when invoked from Ninja
-if (UNIX AND CMAKE_GENERATOR STREQUAL "Ninja")
+if (UNIX AND CMAKE_GENERATOR MATCHES "Ninja")
   include(LLVMCheckLinkerFlag)
   llvm_check_linker_flag(CXX "-Wl,--color-diagnostics" LINKER_SUPPORTS_COLOR_DIAGNOSTICS)
   append_if(LINKER_SUPPORTS_COLOR_DIAGNOSTICS "-Wl,--color-diagnostics"

llvm/cmake/modules/TableGen.cmake

@@ -10,7 +10,7 @@ function(tablegen project ofn)
   endif()
 
   # Use depfile instead of globbing arbitrary *.td(s) for Ninja.
-  if(CMAKE_GENERATOR STREQUAL "Ninja")
+  if(CMAKE_GENERATOR MATCHES "Ninja")
     # Make output path relative to build.ninja, assuming located on
     # ${CMAKE_BINARY_DIR}.
     # CMake emits build targets as relative paths but Ninja doesn't identify
@@ -93,8 +93,11 @@ function(tablegen project ofn)
   get_directory_property(tblgen_includes INCLUDE_DIRECTORIES)
   list(TRANSFORM tblgen_includes PREPEND -I)
 
+  set(tablegen_exe ${${project}_TABLEGEN_EXE})
+  set(tablegen_depends ${${project}_TABLEGEN_TARGET} ${tablegen_exe})
+
   add_custom_command(OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${ofn}
-    COMMAND ${${project}_TABLEGEN_EXE} ${ARGN} -I ${CMAKE_CURRENT_SOURCE_DIR}
+    COMMAND ${tablegen_exe} ${ARGN} -I ${CMAKE_CURRENT_SOURCE_DIR}
     ${tblgen_includes}
     ${LLVM_TABLEGEN_FLAGS}
     ${LLVM_TARGET_DEFINITIONS_ABSOLUTE}
@@ -103,7 +106,7 @@ function(tablegen project ofn)
     # The file in LLVM_TARGET_DEFINITIONS may be not in the current
     # directory and local_tds may not contain it, so we must
     # explicitly list it here:
-    DEPENDS ${${project}_TABLEGEN_TARGET} ${${project}_TABLEGEN_EXE}
+    DEPENDS ${tablegen_depends}
       ${local_tds} ${global_tds}
     ${LLVM_TARGET_DEFINITIONS_ABSOLUTE}
     ${LLVM_TARGET_DEPENDS}
@@ -137,7 +140,7 @@ macro(add_tablegen target project)
   set(LLVM_LINK_COMPONENTS ${LLVM_LINK_COMPONENTS} TableGen)
 
   # CMake doesn't let compilation units depend on their dependent libraries on some generators.
-  if(NOT CMAKE_GENERATOR STREQUAL "Ninja" AND NOT XCODE)
+  if(NOT CMAKE_GENERATOR MATCHES "Ninja" AND NOT XCODE)
     # FIXME: It leaks to user, callee of add_tablegen.
     set(LLVM_ENABLE_OBJLIB ON)
   endif()