[Bug tree-optimization/98272] [11 Regression] ICE: during GIMPLE pass: switchlower: in decompose, at wide-int.h:984 with -O -fno-tree-forwprop by r11-5836

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98272

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Eric Botcazou <ebotcazou@gcc.gnu.org>:

https://gcc.gnu.org/g:61e3c180ad6913fa5af39059de5ba7b3bde50cda

commit r11-6110-g61e3c180ad6913fa5af39059de5ba7b3bde50cda
Author: Eric Botcazou <ebotcazou@adacore.com>
Date:   Wed Dec 16 09:39:07 2020 +0100

    Fix PR tree-optimization/98272

    This fixes the precision mismatch introduced by the previous change.

    gcc/ChangeLog:
            PR tree-optimization/98272
            * tree-switch-conversion.c (bit_test_cluster::emit): When finding
            out whether the entry test can be merged in the bit test, do the
            computation using the type of the index expression.

    gcc/testsuite/ChangeLog:
            * gcc.dg/pr98272.c: New test.