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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/101642] [12 Regression] ice in decompose, at
 wide-int.h:984
Date: Tue, 27 Jul 2021 12:55:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101642

Zdenek Sojka <zsojka at seznam dot cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |zsojka at seznam dot cz

--- Comment #6 from Zdenek Sojka <zsojka at seznam dot cz> ---
Even simpler testcase failing at -O1:
$ cat testcase.c
int x;

void
foo (void)
{
  __builtin_bswap16 (x) ? : x;
}
$ x86_64-pc-linux-gnu-gcc -O testcase.c=20
during GIMPLE pass: fre
testcase.c: In function 'foo':
testcase.c:7:1: internal compiler error: in decompose, at wide-int.h:984
    7 | }
      | ^
0x7f7b80 wi::int_traits<generic_wide_int<wide_int_ref_storage<false, false>=
 >
>::decompose(long*, unsigned int, generic_wide_int<wide_int_ref_storage<fal=
se,
false> > const&)
...=