// optional absolute include for libc++ from InitHeaderSearch.cpp also fires.
// CHECK-LIBCXX: "-stdlib=libc++"
-// CHECK-LIBCXX: "-internal-isystem" "{{[^"]*}}{{[/\\]}}Inputs{{[/\\]}}darwin_toolchain_tree{{[/\\]}}bin{{[/\\]}}include{{[/\\]}}c++{{[/\\]}}v1"
+// CHECK-LIBCXX: "-internal-isystem" "{{[^"]*}}{{/|\\\\}}Inputs{{/|\\\\}}darwin_toolchain_tree{{/|\\\\}}bin{{/|\\\\}}include{{/|\\\\}}c++{{/|\\\\}}v1"
// CHECK-LIBSTDCXX-NOT: -stdlib=libc++
// CHECK-LIBSTDCXX-NOT: -stdlib=libstdc++