[Bug tree-optimization/88553] [9 Regression] ICE: tree check: expected ssa_name, have var_decl in SSA_VAL, at tree-ssa-sccvn.c:461

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88553

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2018-12-19
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  GCC 8 ICEs with

during GIMPLE pass: ifcvt
pr81768-2.c: In function ‘foo._omp_fn.1’:
pr81768-2.c:10:9: internal compiler error: in execute_todo, at passes.c:2043
 #pragma omp target parallel for schedule(static, 32) collapse(3)
         ^~~
0xec47fc execute_todo
        /space/rguenther/src/svn/gcc-8-branch/gcc/passes.c:2043
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

GCC 7 with

pr81768-2.c: In function ‘foo._omp_fn.1’:
pr81768-2.c:10:9: internal compiler error: in make_decl_rtl, at varasm.c:1310
 #pragma omp target parallel for schedule(static, 32) collapse(3)
         ^~~
0x12debba make_decl_rtl(tree_node*)
        /space/rguenther/src/svn/gcc-7-branch/gcc/varasm.c:1306
0xac61f0 expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /space/rguenther/src/svn/gcc-7-branch/gcc/expr.c:9873
0xabeec1 expand_expr_real(tree_node*, rtx_def*, machine_mode, expand_modifier,
rtx_def**, bool)
        /space/rguenther/src/svn/gcc-7-branch/gcc/expr.c:8141
0xaa5945 expand_expr

all probably the same underlying issue of if-conversion mucking up SSA form
in unexpected ways.