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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug rtl-optimization/105383] [11/12 Regression] ICE: in
 change_insns, at rtl-ssa/changes.cc:674 with -Os -fno-tree-dominator-opts
 -fno-tree-vrp -msseregparm -m32 since r11-6188-g0b76990a9d75d97b
Date: Tue, 26 Apr 2022 15:27:10 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105383

--- Comment #2 from Zdenek Sojka <zsojka at seznam dot cz> ---
Created attachment 52886
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D52886&action=3Dedit
a bit different testcase

A bit different testcase, a bit different flags:
$ x86_64-pc-linux-gnu-gcc -Os -fnon-call-exceptions -fno-tree-bit-ccp -m32
testcase2.c=20
during RTL pass: fwprop1
testcase2.c: In function 'foo':
testcase2.c:15:1: internal compiler error: in change_insns, at
rtl-ssa/changes.cc:674
   15 | }
      | ^
0xd3c823
rtl_ssa::function_info::change_insns(array_slice<rtl_ssa::insn_change*>)
        /repo/gcc-trunk/gcc/rtl-ssa/changes.cc:674
0x24b9c97 rtl_ssa::function_info::change_insn(rtl_ssa::insn_change&)
        /repo/gcc-trunk/gcc/rtl-ssa/changes.cc:717
0x2368548 try_fwprop_subst_pattern
        /repo/gcc-trunk/gcc/fwprop.cc:553
0x2368548 try_fwprop_subst
        /repo/gcc-trunk/gcc/fwprop.cc:627
0x2368c6c forward_propagate_and_simplify
        /repo/gcc-trunk/gcc/fwprop.cc:823
0x2368c6c forward_propagate_into
        /repo/gcc-trunk/gcc/fwprop.cc:886
0x2368f1b forward_propagate_into
        /repo/gcc-trunk/gcc/fwprop.cc:835
0x2368f1b fwprop_insn
        /repo/gcc-trunk/gcc/fwprop.cc:943
0x2368ff9 fwprop
        /repo/gcc-trunk/gcc/fwprop.cc:995
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.=