[Bug rtl-optimization/64157] New: [5.0 regression] FAIL: gcc.dg/torture/pr52429.c -O2 -flto -fno-use-linker-plugin -flto-partition=none (internal compiler error)

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64157

            Bug ID: 64157
           Summary: [5.0 regression] FAIL: gcc.dg/torture/pr52429.c   -O2
                    -flto -fno-use-linker-plugin -flto-partition=none
                    (internal compiler error)
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
            Target: powerpc*-*-*

$ gcc/xgcc -Bgcc/ ../gcc/testsuite/gcc.dg/torture/pr52429.c -O2 -flto
-fno-use-linker-plugin -flto-partition=none -g -ftree-parallelize-loops=4 -S
-m64 -o pr52429.s
../gcc/testsuite/gcc.dg/torture/pr52429.c: In function ‘foo’:
../gcc/testsuite/gcc.dg/torture/pr52429.c:24:1: internal compiler error:
Segmentation fault
 }
 ^
0x1066862b crash_signal
        ../../gcc/toplev.c:359
0x104ca167 record_operand_costs
        ../../gcc/ira-costs.c:1303
0x104ca7e7 scan_one_insn
        ../../gcc/ira-costs.c:1483
0x104ca7e7 process_bb_for_costs
        ../../gcc/ira-costs.c:1604
0x104c3f67 ira_traverse_loop_tree(bool, ira_loop_tree_node*, void
(*)(ira_loop_tree_node*), void (*)(ira_loop_tree_node*))
        ../../gcc/ira-build.c:1838
0x104ccceb find_costs_and_classes
        ../../gcc/ira-costs.c:1701
0x104cd187 ira_costs()
        ../../gcc/ira-costs.c:2216
0x104c5cfb ira_build()
        ../../gcc/ira-build.c:3459
0x104bbbdb ira
        ../../gcc/ira.c:5227
0x104bbbdb execute
        ../../gcc/ira.c:5518