[Bug target/99724] New: [11 Regression] CE in in extract_insn, at recog.c:2770

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99724

            Bug ID: 99724
           Summary: [11 Regression] CE in in extract_insn, at recog.c:2770
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-linux-gnu
            Target: arm-linux-gnueabi

The following causes an ICE:

$ arm-linux-gnueabi-gcc
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/fold-minus-1.c -mcpu=iwmmxt2
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/fold-minus-1.c: In function
‘g’:
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/fold-minus-1.c:13:1: error:
unrecognizable insn:
   13 | }
      | ^
(insn 10 9 11 2 (set (reg:V2SI 114 [ _2 ])
        (not:V2SI (reg:V2SI 113 [ _1 ])))
"/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/fold-minus-1.c":10:11 -1
     (nil))
during RTL pass: vregs
/home/marxin/Programming/gcc/gcc/testsuite/gcc.dg/fold-minus-1.c:13:1: internal
compiler error: in extract_insn, at recog.c:2770