[patch][x86] Fix PR83618

[Koval, Julia]

Fix bug, when rdpid intrinsic used eax instead of rax in 64bit mode. Ok for 
trunk?

gcc/
        * config/i386/i386.c (ix86_expand_builtin): Handle IX86_BUILTIN_RDPID.
        * config/i386/i386.md (rdpid_rex64) New.
        (rdpid): Make 32bit only.

gcc/testsuite/
        * gcc.target/i386/rdpid.c: Remove "eax".

Thanks,
Julia

0001-fix.patch
Description: 0001-fix.patch