[ESIMD]Replace use of vc intrinsic with spirv extension for rdtsc API (#13536)

Author: fineg74

clang/lib/Driver/ToolChains/Clang.cpp

@@ -10428,6 +10428,7 @@ static void getOtherSPIRVTransOpts(Compilation &C,
       ",+SPV_INTEL_fpga_invocation_pipelining_attributes"
       ",+SPV_INTEL_fpga_latency_control"
       ",+SPV_INTEL_task_sequence"
+      ",+SPV_KHR_shader_clock"
       ",+SPV_INTEL_bindless_images";
   ExtArg = ExtArg + DefaultExtArg + INTELExtArg;
   if (C.getDriver().IsFPGAHWMode())

clang/test/Driver/sycl-spirv-ext.c

@@ -48,6 +48,7 @@
 // CHECK-DEFAULT-SAME:,+SPV_INTEL_fpga_invocation_pipelining_attributes
 // CHECK-DEFAULT-SAME:,+SPV_INTEL_fpga_latency_control
 // CHECK-DEFAULT-SAME:,+SPV_INTEL_task_sequence
+// CHECK-DEFAULT-SAME:,+SPV_KHR_shader_clock
 // CHECK-DEFAULT-SAME:,+SPV_INTEL_bindless_images
 // CHECK-DEFAULT-SAME:,+SPV_INTEL_token_type
 // CHECK-DEFAULT-SAME:,+SPV_INTEL_bfloat16_conversion
@@ -125,4 +126,3 @@
 // CHECK-CPU-SAME:,+SPV_KHR_non_semantic_info
 // CHECK-CPU-SAME:,+SPV_KHR_cooperative_matrix
 // CHECK-CPU-SAME:,+SPV_INTEL_fp_max_error"
-

sycl/include/CL/__spirv/spirv_ops.hpp

@@ -1280,6 +1280,7 @@ __CLC_BF16_SCAL_VEC(uint32_t)
 
 extern __DPCPP_SYCL_EXTERNAL int32_t __spirv_BuiltInGlobalHWThreadIDINTEL();
 extern __DPCPP_SYCL_EXTERNAL int32_t __spirv_BuiltInSubDeviceIDINTEL();
+extern __DPCPP_SYCL_EXTERNAL uint64_t __spirv_ReadClockKHR(int);
 
 template <typename from, typename to>
 extern __DPCPP_SYCL_EXTERNAL

sycl/include/sycl/ext/intel/esimd/detail/math_intrin.hpp

@@ -244,8 +244,6 @@ __ESIMD_INTRIN __ESIMD_raw_vec_t(T1, N)
     __esimd_ssdp4a_sat(__ESIMD_raw_vec_t(T2, N) src0,
                        __ESIMD_raw_vec_t(T3, N) src1,
                        __ESIMD_raw_vec_t(T4, N) src2) __ESIMD_INTRIN_END;
-__ESIMD_INTRIN __ESIMD_raw_vec_t(uint32_t, 4)
-    __esimd_timestamp() __ESIMD_INTRIN_END;
 
 template <typename T0, typename T1, int SZ>
 __ESIMD_INTRIN __ESIMD_raw_vec_t(T0, SZ)

sycl/include/sycl/ext/intel/esimd/math.hpp

@@ -1844,8 +1844,11 @@ __ESIMD_API uint32_t subb(uint32_t &borrow, uint32_t src0, uint32_t src1) {
 /// rdtsc - get the value of timestamp counter.
 /// @return the current value of timestamp counter
 __ESIMD_API uint64_t rdtsc() {
-  __ESIMD_NS::simd<uint32_t, 4> retv = __esimd_timestamp();
-  return retv.template bit_cast_view<uint64_t>()[0];
+#ifdef __SYCL_DEVICE_ONLY__
+  return __spirv_ReadClockKHR(0);
+#else
+  __ESIMD_UNSUPPORTED_ON_HOST;
+#endif
 }
 
 /// @} sycl_esimd_math