[Bug target/106966] alpha cross build crashes gcc-12 "internal compiler error: in emit_move_insn"

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106966

Uroš Bizjak <ubizjak at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2022-09-23

--- Comment #6 from Uroš Bizjak <ubizjak at gmail dot com> ---
Testcase:

void
do_console (unsigned short *vga)
{
  vga[0] = 'H';
  vga[1] = 'e';
  vga[2] = 'l';
  vga[3] = 'l';
  vga[4] = 'o';
}

cc1 -O2 -mbuild-constants:

during RTL pass: expand
pr106966.c: In function ‘do_console’:
pr106966.c:4:10: internal compiler error: in emit_move_insn, at expr.cc:4052
    4 |   vga[0] = 'H';
      |   ~~~~~~~^~~~~
0x5ed664 emit_move_insn(rtx_def*, rtx_def*)
        ../../git/gcc/gcc/expr.cc:4052
0x113a708 alpha_emit_set_long_const
        ../../git/gcc/gcc/config/alpha/alpha.cc:2090
0x113abfc alpha_split_const_mov(machine_mode, rtx_def**)
        ../../git/gcc/gcc/config/alpha/alpha.cc:2204
0x113ade7 alpha_expand_mov(machine_mode, rtx_def**)
        ../../git/gcc/gcc/config/alpha/alpha.cc:2250
0x15510a8 gen_movv4hi(rtx_def*, rtx_def*)
        ../../git/gcc/gcc/config/alpha/alpha.md:4463
...


(gdb) bt
#0  internal_error (gmsgid=gmsgid@entry=0x1a9cf85 "in %s, at %s:%d") at
../../git/gcc/gcc/diagnostic.cc:2107
#1  0x00000000007918d6 in fancy_abort (file=file@entry=0x1910cf9
"../../git/gcc/gcc/expr.cc", line=line@entry=4052, 
    function=function@entry=0x1a23a78 "emit_move_insn") at
../../git/gcc/gcc/diagnostic.cc:2211
#2  0x00000000005ed665 in emit_move_insn (x=<optimized out>, y=<optimized out>)
at ../../git/gcc/gcc/expr.cc:4052
#3  0x000000000113a709 in alpha_emit_set_long_const (target=0x7fffea2ef9f0,
c1=7077888) at ../../git/gcc/gcc/config/alpha/alpha.cc:2090
#4  0x000000000113abfd in alpha_split_const_mov (mode=E_V4HImode,
operands=0x7fffffffd5a0) at ../../git/gcc/gcc/config/alpha/alpha.cc:2204
#5  0x000000000113ade8 in alpha_expand_mov (mode=E_V4HImode,
operands=0x7fffffffd5a0) at ../../git/gcc/gcc/config/alpha/alpha.cc:2250
#6  0x00000000015510a9 in gen_movv4hi (operand0=0x7fffea2ef9f0,
operand1=0x7fffea29ebc0) at ../../git/gcc/gcc/config/alpha/alpha.md:4463

(gdb) f 3
#3  0x000000000113a709 in alpha_emit_set_long_const (target=0x7fffea2ef9f0,
c1=7077888) at ../../git/gcc/gcc/config/alpha/alpha.cc:2090
2090            emit_move_insn (target, gen_rtx_PLUS (DImode, target, GEN_INT
(d3)));
(gdb) p debug_rtx (target)
(reg:V4HI 71)
$1 = void