Tests: fix some Clang failures on Windows

* Execute MSVCRuntimeLibrary tests for GNU command line mode Clang on
  Windows using the MSVC ABI
* Assembler tests should be executed with the Ninja generator
* Assembler tests shouldn't be executed with clang-cl
* Fixed a condition in the Preprocess test for clang-cl
* Adjusted the conditions on some MSVC specific tests

4 files changed, 14 insertions, 8 deletions

diff --git a/Tests/Assembler/CMakeLists.txt b/Tests/Assembler/CMakeLists.txt
index fb17ebb609..21b265cea4 100644
--- a/Tests/Assembler/CMakeLists.txt
+++ b/Tests/Assembler/CMakeLists.txt
@@ -7,9 +7,10 @@ set(SRCS)
 
 # (at least) the following toolchains can process assembler files directly
 # and also generate assembler files from C:
-if("${CMAKE_GENERATOR}" MATCHES "Makefile|Xcode" AND
+if("${CMAKE_GENERATOR}" MATCHES "Makefile|Xcode|Ninja" AND
     NOT CMAKE_OSX_ARCHITECTURES)
-  if((CMAKE_C_COMPILER_ID MATCHES "^(GNU|Clang|AppleClang|HP|SunPro|XL)$") OR (CMAKE_C_COMPILER_ID STREQUAL "Intel"  AND  UNIX))
+  if((CMAKE_C_COMPILER_ID MATCHES "^(GNU|Clang|AppleClang|HP|SunPro|XL)$") OR (CMAKE_C_COMPILER_ID STREQUAL "Intel"  AND  UNIX)
+     AND NOT (CMAKE_C_COMPILER_ID STREQUAL "Clang" AND "x${CMAKE_C_COMPILER_FRONTEND_VARIANT}" STREQUAL "xMSVC"))
     set(C_FLAGS "${CMAKE_C_FLAGS}")
     separate_arguments(C_FLAGS)
     if(CMAKE_OSX_SYSROOT AND CMAKE_C_SYSROOT_FLAG AND NOT ";${C_FLAGS};" MATCHES ";${CMAKE_C_SYSROOT_FLAG};")
diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index b8b7e21d8c..d9513168e5 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -1877,9 +1877,11 @@ ${CMake_SOURCE_DIR}/Utilities/Release/push.bash --dir dev -- '${CMake_BUILD_NIGH
   endif ()
   list(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/SubDir")
 
-  if(MSVC)
-    ADD_TEST_MACRO(ForceInclude foo)
+  if(MSVC OR (CMAKE_C_COMPILER_ID STREQUAL "Clang" AND CMAKE_C_SIMULATE_ID STREQUAL "MSVC"))
     ADD_TEST_MACRO(PDBDirectoryAndName myexe)
+    if(NOT CMAKE_C_COMPILER_ID STREQUAL "Clang" OR NOT "x${CMAKE_C_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
+      ADD_TEST_MACRO(ForceInclude foo)
+    endif()
     if(NOT CMAKE_C_COMPILER_ID STREQUAL "Clang")
       ADD_TEST_MACRO(PrecompiledHeader foo)
     endif()
diff --git a/Tests/PDBDirectoryAndName/CMakeLists.txt b/Tests/PDBDirectoryAndName/CMakeLists.txt
index 6d8d6cc003..44194ca1a9 100644
--- a/Tests/PDBDirectoryAndName/CMakeLists.txt
+++ b/Tests/PDBDirectoryAndName/CMakeLists.txt
@@ -3,8 +3,8 @@ cmake_policy(SET CMP0054 NEW)
 project(PDBDirectoryAndName C)
 
 # Make sure the proper compiler is in use.
-if(NOT MSVC AND NOT CMAKE_C_COMPILER_ID STREQUAL "Intel")
-  message(FATAL_ERROR "The PDBDirectoryAndName test works only with MSVC or Intel")
+if(NOT MSVC AND NOT CMAKE_C_COMPILER_ID STREQUAL "Intel" AND NOT CMAKE_C_COMPILER_ID STREQUAL "Clang")
+  message(FATAL_ERROR "The PDBDirectoryAndName test works only with MSVC, Clang or Intel")
 endif()
 
 # Intel 11.1 does not support /Fd but Intel 14.0 does.
diff --git a/Tests/Preprocess/CMakeLists.txt b/Tests/Preprocess/CMakeLists.txt
index 588af03204..bce1b3f072 100644
--- a/Tests/Preprocess/CMakeLists.txt
+++ b/Tests/Preprocess/CMakeLists.txt
@@ -29,7 +29,10 @@ if("${CMAKE_GENERATOR}" MATCHES "Visual Studio")
   set(PP_VS 1)
 endif()
 if(CMAKE_C_COMPILER_ID STREQUAL "Clang" AND
-   "x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC" AND
+   "x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC")
+   set(CLANG_MSVC_WINDOWS 1)
+endif()
+if(CLANG_MSVC_WINDOWS AND
    "x${CMAKE_C_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
    set(CLANG_GNULIKE_WINDOWS 1)
 endif()
@@ -106,7 +109,7 @@ endif()
 set(EXPR_OP1 "/")
 if((NOT MSVC OR PP_NMAKE) AND
    NOT CMAKE_C_COMPILER_ID STREQUAL "Intel" AND
-   NOT CLANG_GNULIKE_WINDOWS)
+   NOT CLANG_MSVC_WINDOWS)
   # MSVC cl, Intel icl: %
   # When the cl compiler is invoked from the command line then % must
   # be written %% (to distinguish from %ENV% syntax).  However cl does