old-autovect-branch/gcc/testsuite/gcc.target/i386/pr17692.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -mfpmath=sse -msse2" } */
   3 /* The fact that t1 and t2 are uninitialized is critical.  With them
   4    uninitialized, the register allocator is free to put them in the same
   5    hard register, which results in
   6
   7         xmm0 = xmm0 >= xmm0 ? xmm0 : xmm0
   8
   9    Which is of course a nop, but one for which we would ICE splitting the
  10    pattern.  */
  11
  12 double out;
  13
  14 static void foo(void)
  15 {
  16     double t1, t2, t3, t4;
  17
  18     t4 = t1 >= t2 ? t1 : t2;
  19     t4 = t4 >= t3 ? t4 : t3;
  20     out = t4;
  21 }