gcc/testsuite/gcc.target/powerpc/doloop-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-unroll-loops" } */
   3
   4 unsigned int
   5 foo1 (unsigned int l, int *a)
   6 {
   7   unsigned int i;
   8   for(i = 0;i < l; i++)
   9     a[i] = i;
  10   return l;
  11 }
  12
  13 int
  14 foo2 (int l, int *a)
  15 {
  16   int i;
  17   for(i = 0;i < l; i++)
  18     a[i] = i;
  19   return l;
  20 }
  21
  22 /* The place where we were getting an extra -1 is when converting from 32bits
  23    to 64bits as the ctr register is used as 64bits on powerpc64.  We should be
  24    able to do this loop without "add -1/zero_ext/add 1" to the l to get the
  25    number of iterations of this loop still doing a do-loop.  */
  26
  27 /* { dg-final { scan-assembler-not {(?n)\maddi .*,.*,-1$} } } */
  28 /* { dg-final { scan-assembler-times "bdnz" 2 } } */
  29 /* { dg-final { scan-assembler-times "mtctr" 2 } } */