gcc/testsuite/gcc.dg/tree-ssa/pr61743-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -funroll-loops -fdump-tree-cunroll-details" } */
   3
   4 #define N 8
   5 #define M 14
   6 typedef unsigned char e_u8;
   7 e_u8 x[256];
   8 #define MAX(a,b) ((a)>=(b)?(a):(b))
   9 #define btype e_u8
  10
  11 static inline void bar1(e_u8 a[4][N], e_u8 b[4][N], btype n)
  12 {
  13   int i, j;
  14
  15   for(i = 0; i < 4; i++)
  16     for(j = 0; j < n; j++)
  17       a[i][j] ^= b[i][j];
  18 }
  19
  20 static inline void bar2(e_u8 a[4][N], e_u8 b[256], btype n)
  21 {
  22   int i, j;
  23
  24   for(i = 0; i < 4; i++)
  25     for(j = 0; j < n; j++)
  26       a[i][j] = b[a[i][j]] ;
  27 }
  28
  29 int foo1 (e_u8 a[4][N], int b1, int b2, e_u8 b[M+1][4][N])
  30 {
  31   btype n;
  32   int r, m;
  33
  34   switch (b2) {
  35     case 128: n = 4; break;
  36     case 192: n = 6; break;
  37     case 256: n = 8; break;
  38     default : return (-2);
  39   }
  40   switch (MAX(b1,b2)) {
  41     case 128: m = 10; break;
  42     case 192: m = 12; break;
  43     case 256: m = 14; break;
  44     default : return (-3);
  45   }
  46   bar1(a,b[m],n);
  47   bar2(a,x,n);
  48   return 0;
  49 }
  50
  51 /* { dg-final { scan-tree-dump-times "loop with 4 iterations completely unrolled" 2 "cunroll" } } */
  52 /* { dg-final { scan-tree-dump-times "loop with 8 iterations completely unrolled" 2 "cunroll" } } */
  53 /* { dg-final { cleanup-tree-dump "cunroll" } } */