[Bug libstdc++/112097] New: _PSTL_EARLYEXIT_PRESENT macro doesn't correctly identify intel compilers.

[Bug libstdc++/112097] New: _PSTL_EARLYEXIT_PRESENT macro doesn't correctly identify intel compilers.

[denis.yaroshevskij at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112097

            Bug ID: 112097
           Summary: _PSTL_EARLYEXIT_PRESENT macro doesn't correctly
                    identify intel compilers.
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: denis.yaroshevskij at gmail dot com
  Target Milestone: ---

simd first code: 

https://github.com/gcc-mirror/gcc/blob/be34a8b538c0f04b11a428bd1a9340eb19dec13f/libstdc%2B%2B-v3/include/pstl/unseq_backend_simd.h#L164C13-L164C36

find_if(std::unseq on icx goes to the block = 8 part

https://godbolt.org/z/6fdT4j4cz

despite it supporting the `#pragma omp simd early_exit`
https://godbolt.org/z/Yre19vxdG

[Bug libstdc++/112097] _PSTL_EARLYEXIT_PRESENT macro doesn't correctly identify intel compilers.

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112097

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2023-10-26
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is set in <pstl/pstl_config.h> which does:

#if defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 1800
#   define _PSTL_EARLYEXIT_PRESENT
#   define _PSTL_MONOTONIC_PRESENT
#endif

That was written by Intel, but maybe before icc was replaced by icx.

The relevant macros for icx are:

#define __INTEL_CLANG_COMPILER 20230200
#define __INTEL_LLVM_COMPILER 20230200

[Bug libstdc++/112097] _PSTL_EARLYEXIT_PRESENT macro doesn't correctly identify intel compilers.

[denis.yaroshevskij at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112097

--- Comment #2 from Denis Yaroshevskiy <denis.yaroshevskij at gmail dot com> ---
I was maybe wrong - there is a high chance the pragma doesn't do anything here.
Someone who knows intel compiler and this things should answer.

[Bug libstdc++/112097] _PSTL_EARLYEXIT_PRESENT macro doesn't correctly identify intel compilers.

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112097

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I hope the Intel devs got it right :)