[Bug tree-optimization/91482] __builtin_assume_aligned should not break write combining

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91482

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Aug 21 11:45:34 2019
New Revision: 274796

URL: https://gcc.gnu.org/viewcvs?rev=274796&root=gcc&view=rev
Log:
2019-08-21  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/91482
        * tree-ssa-ccp.c (ccp_folder::fold_stmt): Remove useless
        BUILT_IN_ASSUME_ALIGNED calls.

        * gcc.dg/tree-ssa/pr91482.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr91482.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c