[Bug tree-optimization/52666] [4.8 Regression] FAIL: scal-to-vec1.c

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52666

--- Comment #2 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-03-22 
13:00:53 UTC ---
Created attachment 26954
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26954
scal-to-vec1.c.149t.optimized

Dump created with

$ avr-gcc -mmcu=atmega128 -Os -fdump-tree-optimized

In the source from attachment 26953 there is

int main (int argc, char *argv[])
{
  vector(8, short) v0 = {one, 1, 2, 3, 4, 5, 6, 7};
  vector(8, short) v1;

  v1 = 2 & v0;   check (short, 8, v0, v1, 2, &, l);

  return 0;
}

But the .optimized dump has:

<bb 51>:
  v1 = { 0, 0, 0, 0, 0, 0, 0, 0 };

shouldn't there be non-zero values for the vector components that are 2 mod 4
or 3 mod 4?