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From: "slyfox at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/109643] [14 Regression] IPA inline ICE on pkg-config-0.29.2
 since r14-249-g3c9372dfee0bb8
Date: Thu, 27 Apr 2023 07:57:40 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109643

--- Comment #3 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
Got a slightly nicer backtrace with debugging symbols:

(gdb) bt
#0  0x0000000000f70d7b in canonize (val=3D0x7fffffff9120, len=3Dlen@entry=
=3D0,
precision=3Dprecision@entry=3D576) at ../../source/gcc/wide-int.cc:96
#1  0x0000000000f71699 in wi::force_to_size (val=3Dval@entry=3D0x7fffffff91=
20,
xval=3Dxval@entry=3D0x7fffffffa320, xlen=3D<optimized out>,
    xprecision=3D<optimized out>, precision=3Dprecision@entry=3D576, sgn=3D=
<optimized
out>) at ../../source/gcc/wide-int.cc:400
#2  0x0000000000bd6c3d in fixed_wide_int_storage<576>::from (sgn=3D<optimiz=
ed
out>, x=3D...) at ../../source/gcc/wide-int.h:1292

Looks like canonize() below has `val` of zero length:

  (gdb) print len
  $1 =3D 0
  (gdb) print val
  $2 =3D (long *) 0x7fffffff9120

static unsigned int
canonize (HOST_WIDE_INT *val, unsigned int len, unsigned int precision)
{
  unsigned int blocks_needed =3D BLOCKS_NEEDED (precision);
  HOST_WIDE_INT top;
  int i;

  if (len > blocks_needed)
    len =3D blocks_needed;

  if (len =3D=3D 1)
    return len;

  top =3D val[len - 1];
  ...=