Add xcselect test

Author: carlocab

clang/test/CMakeLists.txt

@@ -10,6 +10,7 @@ llvm_canonicalize_cmake_booleans(
   CLANG_PLUGIN_SUPPORT
   CLANG_SPAWN_CC1
   CLANG_ENABLE_CIR
+  CLANG_USE_XCSELECT
   ENABLE_BACKTRACES
   LLVM_BUILD_EXAMPLES
   LLVM_BYE_LINK_INTO_TOOLS

clang/test/Driver/xcselect.c

@@ -0,0 +1,5 @@
+// REQUIRES: xcselect
+// RUN: %clang -target arm64-apple-darwin -c -### %s 2> %t.log
+// RUN: FileCheck %s <%t.log
+
+// CHECK: "-isysroot" "{{.*}}/SDKs/MacOSX{{([0-9]+(\.[0-9]+)?)?}}.sdk"

clang/test/lit.cfg.py

@@ -338,6 +338,8 @@ def calculate_arch_features(arch_string):
 if config.have_llvm_driver:
     config.available_features.add("llvm-driver")
 
+if config.use_xcselect:
+    config.available_features.add("xcselect")
 
 # Some tests perform deep recursion, which requires a larger pthread stack size
 # than the relatively low default of 192 KiB for 64-bit processes on AIX. The

clang/test/lit.site.cfg.py.in

@@ -44,6 +44,7 @@ config.standalone_build = @CLANG_BUILT_STANDALONE@
 config.ppc_linux_default_ieeelongdouble = @PPC_LINUX_DEFAULT_IEEELONGDOUBLE@
 config.have_llvm_driver = @LLVM_TOOL_LLVM_DRIVER_BUILD@
 config.substitutions.append(("%llvm-version-major", "@LLVM_VERSION_MAJOR@"))
+config.use_xcselect = @CLANG_USE_XCSELECT@
 
 import lit.llvm
 lit.llvm.initialize(lit_config, config)