[Bug target/58421] New: [4.9 regression] FAIL: gcc.c-torture/compile/20051216-1.c -O3 -fomit-frame-pointer (internal compiler error)

[schwab@linux-m68k.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58421

            Bug ID: 58421
           Summary: [4.9 regression] FAIL:
                    gcc.c-torture/compile/20051216-1.c  -O3
                    -fomit-frame-pointer  (internal compiler error)
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: schwab@linux-m68k.org
                CC: rguenther at suse dot de
            Target: ia64-*-*

Broken by r202525.

$ gcc/xgcc -Bgcc/ -fno-diagnostics-show-caret -fdiagnostics-color=never -O3
-fomit-frame-pointer -w -c -o 20051216-1.o
../gcc/testsuite/gcc.c-torture/compile/20051216-1.c
../gcc/testsuite/gcc.c-torture/compile/20051216-1.c: In function ‘test’:
../gcc/testsuite/gcc.c-torture/compile/20051216-1.c:131:1: internal compiler
error: in add_insn_before_nobb, at emit-rtl.c:3836
0x40000000004ad1df add_insn_before_nobb
        ../../gcc/emit-rtl.c:3836
0x40000000004b886f add_insn_before(rtx_def*, rtx_def*, basic_block_def*)
        ../../gcc/emit-rtl.c:3898
0x40000000004b8b1f emit_pattern_before_noloc
        ../../gcc/emit-rtl.c:4179
0x40000000004b8c5f emit_pattern_before_setloc
        ../../gcc/emit-rtl.c:4586
0x4000000000952cff get_nop_from_pool(rtx_def*)
        ../../gcc/sel-sched-ir.c:1048
0x4000000000972ddf prepare_place_to_insert
        ../../gcc/sel-sched.c:5263
0x4000000000972ddf schedule_expr_on_boundary
        ../../gcc/sel-sched.c:5503
0x400000000097710f fill_insns
        ../../gcc/sel-sched.c:5646
0x400000000097710f schedule_on_fences
        ../../gcc/sel-sched.c:7423
0x400000000097710f sel_sched_region_2
        ../../gcc/sel-sched.c:7557
0x400000000097f64f sel_sched_region_1
        ../../gcc/sel-sched.c:7670
0x400000000097f64f sel_sched_region(int)
        ../../gcc/sel-sched.c:7697
0x40000000009810ef run_selective_scheduling()
        ../../gcc/sel-sched.c:7773
0x4000000000e70d2f ia64_reorg
        ../../gcc/config/ia64/ia64.c:9723
0x400000000090610f rest_of_handle_machine_reorg
        ../../gcc/reorg.c:3920
0x400000000090610f execute
        ../../gcc/reorg.c:3950