[Bug tree-optimization/91162] [9/10 Regression] ICE: tree check: expected class 'type', have 'exceptional' (error_mark) in useless_type_conversion_p, at gimple-expr.c:86 (error: invalid 'PHI' argument)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91162

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Jul 15 12:48:47 2019
New Revision: 273492

URL: https://gcc.gnu.org/viewcvs?rev=273492&root=gcc&view=rev
Log:
2019-07-15  Richard Biener  <rguenther@suse.de>

        PR middle-end/91162
        * tree-cfg.c (move_block_to_fn): When releasing a virtual PHI
        node make sure to replace all uses with something valid.

        * gcc.dg/autopar/pr91162.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/autopar/pr91162.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-cfg.c