[SYCL] Link sycl-devicelib-host lib in clang-cl + fscyl by default. (#6503)

Author: jinge90

clang/lib/Driver/ToolChains/Clang.cpp

@@ -8140,6 +8140,7 @@ void Clang::AddClangCLArgs(const ArgList &Args, types::ID InputType,
         CmdArgs.push_back("--dependent-lib=sycld");
       else
         CmdArgs.push_back("--dependent-lib=sycl");
+      CmdArgs.push_back("--dependent-lib=sycl-devicelib-host");
     }
   }
 

clang/test/Driver/sycl-device-lib-win.cpp

@@ -165,3 +165,9 @@
 // SYCL_LLVM_LINK_NO_DEVICE_LIB: clang{{.*}} "-cc1" {{.*}} "-fsycl-is-device"
 // SYCL_LLVM_LINK_NO_DEVICE_LIB-NOT: llvm-link{{.*}}  "-only-needed"
 // SYCL_LLVM_LINK_NO_DEVICE_LIB: sycl-post-link{{.*}}  "-symbols" "-spec-const=rt" {{.*}} "-o" "{{.*}}.table" "{{.*}}.bc"
+
+/// ###########################################################################
+/// test clang-cl behavior for linking sycl-devicelib-host.lib by default
+// RUN: %clang_cl -fsycl %s /winsysroot=%S/Inputs/SYCL-windows -### 2>&1 \
+// RUN:   | FileCheck %s -check-prefix=SYCL_DEVICE_HOST_LIB
+// SYCL_DEVICE_HOST_LIB: {{.*}} "--dependent-lib=sycl-devicelib-host" {{.*}}