gcc/testsuite/gcc.dg/torture/pr54894.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target size32plus } */
   3
   4 typedef unsigned long long uint64_t;
   5
   6 #define n 4096
   7 double A[n][n] __attribute__((aligned(16)));
   8 double B[n][n] __attribute__((aligned(16)));
   9 double C[n][n] __attribute__((aligned(16)));
  10
  11 #define tilesize 128
  12
  13 typedef double adouble __attribute__((__aligned__(16)));
  14
  15 void foo ()
  16 {
  17   int ih, jh, kh, il, kl, jl;
  18   for (ih = 0; ih < n; ih += tilesize)
  19     for (jh = 0; jh < n; jh += tilesize)
  20       for (kh = 0; kh < n; kh += tilesize)
  21         for (il = 0; il < tilesize; ++il)
  22           {
  23             adouble *Ap = (adouble *)&A[ih+il][kh];
  24             for (kl = 0; kl < tilesize; ++kl)
  25               for (jl = 0; jl < tilesize; ++jl)
  26                 C[ih+il][jh+jl] += Ap[kl] * B[kh+kl][jh+jl];
  27           }
  28 }