[Bug c/61240] [6/7/8 Regression] Incorrect warning "integer overflow in expression" on pointer-pointer subtraction

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61240

--- Comment #19 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Thu Jan 18 08:29:14 2018
New Revision: 256838

URL: https://gcc.gnu.org/viewcvs?rev=256838&root=gcc&view=rev
Log:
        PR c/61240
        * match.pd ((P + A) - P, P - (P + A), (P + A) - (P + B)): For
        pointer_diff optimizations use view_convert instead of convert.

        * gcc.dg/pr61240.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr61240.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog