[Bug tree-optimization/94809] [8/9 Regression] Different results between gcc-9 and gcc-6

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94809

--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-9 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:522022361984407ebc84cde22bdbd199261d0443

commit r9-8888-g522022361984407ebc84cde22bdbd199261d0443
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Tue Apr 28 11:26:56 2020 +0200

    tree: Fix up TREE_SIDE_EFFECTS on internal calls [PR94809]

    On the following testcase, match.pd during GENERIC folding
    changes the -1U / x < y into __imag__ .MUL_OVERFLOW (x, y),
    but unfortunately unlike for normal calls nothing sets TREE_SIDE_EFFECTS on
    the call.  There is the process_call_operands function that non-internal
    call creation calls and it is usable for internal calls too,
    e.g. TREE_SIDE_EFFECTS is derived from checking whether the
    call has side-effects (non-ECF_{CONST,PURE}; we have those for internal
    calls) and from whether any of the arguments has TREE_SIDE_EFFECTS.

    2020-04-28  Jakub Jelinek  <jakub@redhat.com>

            PR tree-optimization/94809
            * tree.c (build_call_expr_internal_loc_array): Call
            process_call_operands.

            * gcc.c-torture/execute/pr94809.c: New test.

    (cherry picked from commit 34f6b14ff33e0c64b3a4a1a2cd871df715d69151)