[SYCL][ABI-break] Remove unused host SPIR‑V built‑ins and their symbol exports (#20848)

We don't support host device, so these can be removed.

Author: againull

sycl/doc/design/CompilerAndRuntimeDesign.md

@@ -890,9 +890,6 @@ The SPIR-V specific C++ enumerators and classes are declared in the file:
 The SPIR-V specific C++ function declarations are in the file:
 `sycl/include/CL/__spirv/spirv_ops.hpp`.
 
-The SPIR-V specific functions are implemented in for the SYCL host device here:
-`sycl/source/spirv_ops.cpp`.
-
 ### Address spaces handling
 
 SYCL specification uses C++ classes to represent pointers to disjoint memory

sycl/source/CMakeLists.txt

@@ -356,7 +356,6 @@ set(SYCL_COMMON_SOURCES
 )
 
 set(SYCL_NON_PREVIEW_SOURCES "${SYCL_COMMON_SOURCES}"
-  "spirv_ops.cpp"
 )
 
 

sycl/source/ld-version-script.txt

@@ -17,15 +17,6 @@
     /* Some functions are also in __host_std, export them as well */
     _ZN10__host_std*;
 
-    /* Export SPIR-V built-ins for host device */
-    /* #ifndef __INTEL_PREVIEW_BREAKING_CHANGES */
-    /* TODO: drop those in the next ABI-breaking window */
-    _Z23__spirv_GroupWaitEvents*;
-    _Z22__spirv_ControlBarrier*;
-    _Z21__spirv_MemoryBarrier*;
-    _Z20__spirv_ocl_prefetch*;
-    /* #endif // __INTEL_PREVIEW_BREAKING_CHANGES */
-
     /* Export offload image hooks */
     __sycl_register_lib;
     __sycl_unregister_lib;

sycl/source/spirv_ops.cpp

@@ -7,10 +7,6 @@
 # REQUIRES: linux
 # UNSUPPORTED: libcxx
 
-_Z20__spirv_ocl_prefetchPKcm
-_Z21__spirv_MemoryBarrierN5__spv5ScopeEj
-_Z22__spirv_ControlBarrierN5__spv5ScopeES0_j
-_Z23__spirv_GroupWaitEventsN5__spv5ScopeEjPPv
 _ZN4sycl3_V110__abs_implENS0_3vecIaLi16EEE
 _ZN4sycl3_V110__abs_implENS0_3vecIaLi1EEE
 _ZN4sycl3_V110__abs_implENS0_3vecIaLi2EEE

sycl/test/abi/sycl_symbols_linux.dump

@@ -3435,10 +3435,6 @@
 ?__smoothstep_impl@_V1@sycl@@YA?AVhalf@half_impl@detail@12@V34512@00@Z
 ?__smoothstep_impl@_V1@sycl@@YAMMMM@Z
 ?__smoothstep_impl@_V1@sycl@@YANNNN@Z
-?__spirv_ControlBarrier@@YAXUScope@__spv@@0I@Z
-?__spirv_GroupWaitEvents@@YAXUScope@__spv@@IPEAPEAX@Z
-?__spirv_MemoryBarrier@@YAXUScope@__spv@@I@Z
-?__spirv_ocl_prefetch@@YAXPEBD_K@Z
 ?__sqrt_impl@_V1@sycl@@YA?AV?$vec@M$00@12@V312@@Z
 ?__sqrt_impl@_V1@sycl@@YA?AV?$vec@M$01@12@V312@@Z
 ?__sqrt_impl@_V1@sycl@@YA?AV?$vec@M$02@12@V312@@Z