[SYCL] Remove experimental/builtins.hpp from sycl.hpp due to C++17 (#6386)

C++17 usage of if constexpr etc was added to experimental/builtins.hpp as requested in #5964, but I did not remove this header from sycl.hpp since there were no failing tests and I didn't notice it was included in sycl.hpp. Apparently sycl.hpp should not include any usage of C++17. This may be related to some of the failing tests that appear only on the CI: intel/llvm-test-suite#975 (comment). Necessary changes to the tests are added here : intel/llvm-test-suite#1072

Signed-off-by: JackAKirk jack.kirk@codeplay.com

Author: JackAKirk

sycl/include/CL/sycl.hpp

@@ -61,7 +61,6 @@
 #include <sycl/ext/oneapi/backend/level_zero.hpp>
 #endif
 #include <sycl/ext/oneapi/device_global/properties.hpp>
-#include <sycl/ext/oneapi/experimental/builtins.hpp>
 #include <sycl/ext/oneapi/experimental/cuda/barrier.hpp>
 #include <sycl/ext/oneapi/filter_selector.hpp>
 #include <sycl/ext/oneapi/group_algorithm.hpp>

sycl/test/basic_tests/built-ins.cpp

@@ -7,7 +7,8 @@
 // Hits an assertion with AMD:
 // XFAIL: hip_amd
 
-#include <CL/sycl.hpp>
+#include <sycl/ext/oneapi/experimental/builtins.hpp>
+#include <sycl/sycl.hpp>
 
 #include <cassert>
 

sycl/test/extensions/experimental-printf.cpp

@@ -16,7 +16,8 @@
 // CHECK: Constant [[#TYPE]] [[#CONST:]]
 // CHECK: ExtInst [[#]] [[#]] [[#]] printf [[#]] [[#CONST]]
 
-#include <CL/sycl.hpp>
+#include <sycl/ext/oneapi/experimental/builtins.hpp>
+#include <sycl/sycl.hpp>
 
 #ifdef __SYCL_DEVICE_ONLY__
 #define __SYCL_CONSTANT_AS __attribute__((opencl_constant))