[SYCL] Remove unnecessary fallback-cassert file for CUDA/AMD assert

libdevice/cmake/modules/SYCLLibdevice.cmake

@@ -580,11 +580,6 @@ else()
   endif()
 endif()
 
-add_devicelibs(libsycl-fallback-cassert
-  SRC fallback-cassert.cpp
-  BUILD_ARCHS ${full_build_archs}
-  DEPENDENCIES ${crt_obj_deps}
-  EXTRA_OPTS -fno-sycl-instrument-device-code)
 add_devicelibs(libsycl-fallback-cstring
   SRC fallback-cstring.cpp
   BUILD_ARCHS ${full_build_archs}

libdevice/crt_wrapper.cpp

@@ -134,6 +134,11 @@ void srand(unsigned int seed) {
   RAND_NEXT_ACC[gid1] = seed;
 }
 
+#if defined(__NVPTX__) || defined(__AMDGCN__)
+DEVICE_EXTERN_C void __assertfail(const char *__message, const char *__file,
+                                  unsigned __line, const char *__function,
+                                  size_t charSize);
+#endif
 #if defined(_WIN32)
 // Truncates a wide (16 or 32 bit) string (wstr) into an ASCII string (str).
 // Any non-ASCII characters are replaced by question mark '?'.
@@ -157,21 +162,29 @@ void _wassert(const wchar_t *wexpr, const wchar_t *wfile, unsigned line) {
   char expr[256];
   __truncate_wchar_char_str(wexpr, expr, sizeof(expr));
 
+#if defined(__NVPTX__) || defined(__AMDGCN__)
+  __assertfail(expr, file, line, nullptr, 1);
+#else
   __devicelib_assert_fail(
       expr, file, line, /*func=*/nullptr, __spirv_BuiltInGlobalInvocationId(0),
       __spirv_BuiltInGlobalInvocationId(1),
       __spirv_BuiltInGlobalInvocationId(2), __spirv_BuiltInLocalInvocationId(0),
       __spirv_BuiltInLocalInvocationId(1), __spirv_BuiltInLocalInvocationId(2));
+#endif
 }
 #else
 DEVICE_EXTERN_C
 void __assert_fail(const char *expr, const char *file, unsigned int line,
                    const char *func) {
+#if defined(__NVPTX__) || defined(__AMDGCN__)
+  __assertfail(expr, file, line, func, 1);
+#else
   __devicelib_assert_fail(
       expr, file, line, func, __spirv_BuiltInGlobalInvocationId(0),
       __spirv_BuiltInGlobalInvocationId(1),
       __spirv_BuiltInGlobalInvocationId(2), __spirv_BuiltInLocalInvocationId(0),
       __spirv_BuiltInLocalInvocationId(1), __spirv_BuiltInLocalInvocationId(2));
+#endif
 }
 
 // In GCC-15, std::__glibcxx_assert_fail is added to do runtime check for some