[Bug rtl-optimization/97540] New: [11 Regression] ICE in lra_set_insn_recog_data, at lra.c:1004 since r11-4202-g4de7b010038933dd

[marxin at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97540

            Bug ID: 97540
           Summary: [11 Regression] ICE in lra_set_insn_recog_data, at
                    lra.c:1004 since r11-4202-g4de7b010038933dd
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: hjl at gcc dot gnu.org
  Target Milestone: ---

The following fails, it's reduced from linux kernel:

$ cat mediatek.i
int mt7615_add_interface_dev_0;
int ffs(int x) { asm("" : : "rm"(x)); }
int mt7615_add_interface() { ffs(~mt7615_add_interface_dev_0); }

$ gcc mediatek.i -c -O2
during RTL pass: reload
mediatek.i: In function ‘mt7615_add_interface’:
mediatek.i:3:64: internal compiler error: in lra_set_insn_recog_data, at
lra.c:1004
    3 | int mt7615_add_interface() { ffs(~mt7615_add_interface_dev_0); }
      |                                                                ^
0x6a2457 lra_set_insn_recog_data(rtx_insn*)
        /home/marxin/Programming/gcc/gcc/lra.c:1004
0xc2434f lra_get_insn_recog_data
        /home/marxin/Programming/gcc/gcc/lra-int.h:488
0xc2434f remove_scratches_1
        /home/marxin/Programming/gcc/gcc/lra.c:2064
0xc244a3 lra_emit_move(rtx_def*, rtx_def*)
        /home/marxin/Programming/gcc/gcc/lra.c:506
0xc368c6 curr_insn_transform
        /home/marxin/Programming/gcc/gcc/lra-constraints.c:4523
0xc37db6 lra_constraints(bool)
        /home/marxin/Programming/gcc/gcc/lra-constraints.c:5123
0xc24d8c lra(_IO_FILE*)
        /home/marxin/Programming/gcc/gcc/lra.c:2415
0xbe0171 do_reload
        /home/marxin/Programming/gcc/gcc/ira.c:5529
0xbe0171 execute
        /home/marxin/Programming/gcc/gcc/ira.c:5715
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with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.