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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/98287] [10/11 Regression] ICE: in
 expand_expr_real_2, at expr.c:10000 with -O2 -fno-tree-ccp -fno-tree-forwprop
Date: Mon, 21 Dec 2020 11:22:23 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98287

--- Comment #2 from Zdenek Sojka <zsojka at seznam dot cz> ---
Created attachment 49818
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D49818&action=3Dedit
another testcase

$ x86_64-pc-linux-gnu-gcc -Og -fipa-cp another_testcase.c
during RTL pass: expand
another_testcase.c: In function 'bar.constprop':
another_testcase.c:7:23: internal compiler error: in expand_expr_real_2, at
expr.c:10000
    7 |   return v << (s & 3) >> (s & 3);
      |          ~~~~~~~~~~~~~^~~~~~~~~~
0x667803 expand_expr_real_2(separate_ops*, rtx_def*, machine_mode,
expand_modifier)
        /repo/gcc-trunk/gcc/expr.c:10000
0xc280cb expand_expr_real_1(tree_node*, rtx_def*, machine_mode,
expand_modifier, rtx_def**, bool)
        /repo/gcc-trunk/gcc/expr.c:10201
0xaf2b5b expand_expr
        /repo/gcc-trunk/gcc/expr.h:282
0xaf2b5b expand_return
        /repo/gcc-trunk/gcc/cfgexpand.c:3764
0xaf2b5b expand_gimple_stmt_1
        /repo/gcc-trunk/gcc/cfgexpand.c:3873
0xaf2b5b expand_gimple_stmt
        /repo/gcc-trunk/gcc/cfgexpand.c:3999
0xaf80fb expand_gimple_basic_block
        /repo/gcc-trunk/gcc/cfgexpand.c:6036
0xaf9c76 execute
        /repo/gcc-trunk/gcc/cfgexpand.c:6720
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.=