[Bug tree-optimization/90316] [8/9 Regression] large compile time increase in opt / alias stmt walking for Go example

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90316

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon May  6 08:54:40 2019
New Revision: 270902

URL: https://gcc.gnu.org/viewcvs?rev=270902&root=gcc&view=rev
Log:
2019-05-06  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/90316
        * tree-ssa-alias.c (maybe_skip_until): Pass in target BB,
        compute target on demand.
        (get_continuation_for_phi): Remove code walking stmts to
        get to a target virtual operand which could end up being
        quadratic.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-alias.c