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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/101242] Segfault in SLP vectorizor after
 g:2ad71efb5de
Date: Tue, 29 Jun 2021 07:51:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101242

--- Comment #6 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to David Binderman from comment #4)
> Created attachment 51078 [details]
> gzipped C++ source code
>=20
> I also see this with -O3 with the attached C++ code.

Poor example - too big to reduce easily. Here is some reduced
C code from a different example:

--- /home/dcb/cvise/test/bug733b.c ---
typedef struct {
  int height, width
} ufraw_image_data;
typedef struct {
  ufraw_image_data thumb
} ufraw_data;
ufraw_data ufraw_convert_embedded_uf;
int ufraw_convert_embedded_uf_1;
void ufraw_convert_embedded(void) {
  unsigned srcHeight =3D ufraw_convert_embedded_uf.thumb.height,
           srcWidth =3D ufraw_convert_embedded_uf.thumb.width;
  int scaleDenom =3D 1;
  srcSize();
  if (ufraw_convert_embedded_uf_1)
    scaleDenom =3D srcSize;
  unsigned dstWidth =3D srcWidth / scaleDenom;
  unsigned dstHeight =3D srcHeight / scaleDenom;
  if (dstWidth !=3D srcWidth || dstHeight !=3D srcHeight) {
    unsigned width =3D dstHeight;
    dstHeight =3D dstWidth;
    dstWidth =3D width;
  }
  ufraw_convert_embedded_uf.thumb.height =3D dstHeight;
  ufraw_convert_embedded_uf.thumb.width =3D dstWidth;
}=