[Bug middle-end/49603] [4.7 Regression] 177.mesa in SPEC CPU 2000 failed to build

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49603

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> 2011-07-01 02:50:25 UTC ---
[hjl@gnu-34 delta]$ cat testcase.c
struct gl_visual {
  float AlphaScale;
};
struct gl_context {
  struct gl_visual *Visual;
};
void quickdraw_rgb( struct gl_context * ctx,
            int width, int height)
{
  int i, j;
  unsigned char alpha[1600];
  for (j=0; j<width; j++)
    alpha[j] = (int) ctx->Visual->AlphaScale; 
  for (i=0; i<height; i++)
    foo( alpha);
}
[hjl@gnu-34 delta]$ /export/regression/rrs/175704/usr/bin/gcc -O3 -S testcase.c
-S 
testcase.c: In function \u2018quickdraw_rgb\u2019:
testcase.c:7:6: internal compiler error: in vectorizable_load, at
tree-vect-stmts.c:4589
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[hjl@gnu-34 delta]$