[Bug tree-optimization/101242] Segfault in SLP vectorizor after g:2ad71efb5de

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101242

--- 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
> 
> 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 = ufraw_convert_embedded_uf.thumb.height,
           srcWidth = ufraw_convert_embedded_uf.thumb.width;
  int scaleDenom = 1;
  srcSize();
  if (ufraw_convert_embedded_uf_1)
    scaleDenom = srcSize;
  unsigned dstWidth = srcWidth / scaleDenom;
  unsigned dstHeight = srcHeight / scaleDenom;
  if (dstWidth != srcWidth || dstHeight != srcHeight) {
    unsigned width = dstHeight;
    dstHeight = dstWidth;
    dstWidth = width;
  }
  ufraw_convert_embedded_uf.thumb.height = dstHeight;
  ufraw_convert_embedded_uf.thumb.width = dstWidth;
}