gcc/testsuite/gcc.target/i386/pr48721.c

   1 /* PR rtl-optimization/48721 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O -foptimize-sibling-calls -fsched2-use-superblocks -fschedule-insns2 -mtune=core2" } */
   4
   5 extern unsigned char a[];
   6 extern int b[], d[], e[], f[], g[], *h[], m[], *n[], o[];
   7 extern char c[];
   8
   9 struct S
  10 {
  11   unsigned char s1;
  12   int s2, s3, s4, s5, s6, s7, s8;
  13 };
  14
  15 __attribute__((noinline, noclone)) int
  16 foo (int x)
  17 {
  18   return 0;
  19 }
  20
  21 int
  22 bar (int x, struct S *y)
  23 {
  24   int z;
  25   switch (x)
  26     {
  27     case 1:
  28     case 2:
  29       {
  30         int t2, t4, t5, t6, t7, t8;
  31         z = o[y->s8 * 6];
  32         t8 = *n[m[x] * 5];
  33         t4 = *h[y->s7];
  34         t7 = z;
  35         z = g[f[x] + y->s6];
  36         t6 = e[y->s5];
  37         t5 = d[c[x] + y->s3 * 17];
  38         if (z)
  39           t2 = b[z];
  40         if (a[z] != y->s1)
  41           return foo (x);
  42         y->s8 = t8;
  43         y->s4 = t4;
  44         y->s7 = t7;
  45         y->s6 = t6;
  46         y->s5 = t5;
  47         y->s2 = t2;
  48       }
  49     }
  50   return 0;
  51 }