[Bug tree-optimization/92883] New: [10 Regression] ICE in compare_values_warnv

[krebbel at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92883

            Bug ID: 92883
           Summary: [10 Regression] ICE in compare_values_warnv
           Product: gcc
           Version: 10.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: krebbel at gcc dot gnu.org
  Target Milestone: ---

Created attachment 47456
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47456&action=edit
Reduced testcase

Compiling the attached testcase for IBM Z with

gcc -O2 -march=z13 t.c -c

during IPA pass: cp
crash0.c: At top level:
crash0.c:718:1: internal compiler error: in compare_values_warnv, at
tree-vrp.c:540
0x1b5cd43 compare_values_warnv(tree_node*, tree_node*, bool*)
        /home/andreas/gcc/gcc/tree-vrp.c:539
0x1b5ce15 compare_values(tree_node*, tree_node*)
        /home/andreas/gcc/gcc/tree-vrp.c:700
0x1ba9beb value_range::check()
        /home/andreas/gcc/gcc/value-range.cc:283
0x1baa673 value_range::set(tree_node*, tree_node*, value_range_kind)
        /home/andreas/gcc/gcc/value-range.cc:236
0x1bad70b value_range::set(tree_node*, tree_node*, value_range_kind)
        /home/andreas/gcc/gcc/value-range.cc:84
0x1bad70b value_range::intersect_helper(value_range const*, value_range const*)
        /home/andreas/gcc/gcc/value-range.cc:943
0x1bae4c7 value_range::intersect(value_range const*)
        /home/andreas/gcc/gcc/value-range.cc:1323
0x208db01 propagate_vr_across_jump_function
        /home/andreas/gcc/gcc/ipa-cp.c:2020
0x208db01 propagate_constants_across_call
        /home/andreas/gcc/gcc/ipa-cp.c:2393
0x20917d3 propagate_constants_topo
        /home/andreas/gcc/gcc/ipa-cp.c:3313
0x20917d3 ipcp_propagate_stage
        /home/andreas/gcc/gcc/ipa-cp.c:3409
0x20958f5 ipcp_driver
        /home/andreas/gcc/gcc/ipa-cp.c:5261
0x20958f5 execute
        /home/andreas/gcc/gcc/ipa-cp.c:5354
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.



The testcase compiles fine before r278185