[Bug tree-optimization/93199] [8/9/10 Regression] Compile time hog in sink_clobbers

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93199

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jan  8 14:30:44 2020
New Revision: 280006

URL: https://gcc.gnu.org/viewcvs?rev=280006&root=gcc&view=rev
Log:
2020-01-08  Richard Biener  <rguent...@suse.de>

        PR middle-end/93199
        * tree-eh.c (sink_clobbers): Update virtual operands for
        the first and last stmt only.  Add a dry-run capability.
        (pass_lower_eh_dispatch::execute): Perform clobber sinking
        after CFG manipulations and in RPO order to catch all
        secondary opportunities reliably.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-eh.c