gcc/testsuite/gcc.dg/loop-unswitch-3.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -funswitch-loops -fdump-tree-unswitch-details" } */
   3
   4 #include <stdlib.h>
   5 #define N 32
   6 float *foo(int ustride, int size, float *src)
   7 {
   8    float *buffer, *p;
   9    int i, k;
  10
  11    if (!src)
  12     return NULL;
  13
  14    buffer = (float *) malloc(N * size * sizeof(float));
  15
  16    if(buffer)
  17       for(i=0, p=buffer; i<N; i++, src+=ustride)
  18         for(k=0; k<size; k++)
  19           *p++ = src[k];
  20
  21    return buffer;
  22 }
  23
  24 /* { dg-final { scan-tree-dump-times "guard hoisted" 1 "unswitch" } } */
  25 /* { dg-final { scan-tree-dump-not "Invalid sum" "unswitch" } } */
  26
  27