[Bug target/84945] [8 Regression] UBSAN: gcc/config/i386/i386.c:33312:22: runtime error: shift exponent 32 is too large for 32-bit type 'int'

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84945

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Mar 20 08:14:42 2018
New Revision: 258673

URL: https://gcc.gnu.org/viewcvs?rev=258673&root=gcc&view=rev
Log:
        PR target/84945
        * config/i386/i386.c (fold_builtin_cpu): For features above 31
        use __cpu_features2 variable instead of __cpu_model.__cpu_features[0].
        Use 1U instead of 1.  Formatting fixes.

        * gcc.target/i386/pr84945.c: New test.

        * config/i386/cpuinfo.h (__cpu_features2): Declare.
        * config/i386/cpuinfo.c (__cpu_features2): New variable for
        ifndef SHARED only.
        (set_feature): Define.
        (get_available_features): Use set_feature macro.  Set __cpu_features2
        to the second word of features ifndef SHARED.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr84945.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.c
    trunk/gcc/testsuite/ChangeLog
    trunk/libgcc/ChangeLog
    trunk/libgcc/config/i386/cpuinfo.c
    trunk/libgcc/config/i386/cpuinfo.h