nsz Git - libfirm/blob - ir/be/test/codegen/spillharness2.c

   1 volatile int G1, G2, G3, G4, G5;
   2
   3 volatile int VG;
   4
   5 static void __attribute__((noinline)) f(int k)
   6 {
   7         (void) k;
   8 }
   9
  10 static void __attribute__((noinline)) test()
  11 {
  12         int foo = rand();
  13
  14         // spill foo.
  15         int t1 = G1;
  16         int t2 = G2;
  17         int t3 = G3;
  18         int t4 = G4;
  19         int t5 = G5;
  20
  21         int bar = rand();
  22         int i;
  23
  24         G1 = t1; G2 = t2; G3 = t3; G4 = t4; G5 = t5;
  25         G1 = t1; G2 = t2; G3 = t3; G4 = t4; G5 = t5;
  26         G1 = t1; G2 = t2; G3 = t3; G4 = t4; G5 = t5;
  27
  28         i = 10000;
  29         while (i--) {
  30                 VG = foo;  // really keep foo in a reg.
  31                 f(bar);   // bar live
  32                 G1 = t1;
  33                 VG = foo;
  34                 G2 = t2;
  35                 VG = foo;
  36                 G3 = t3;
  37                 VG = foo;
  38                 G4 = t4;
  39                 VG = foo;
  40                 G5 = t5;
  41
  42         }
  43 }
  44
  45 int main(void)
  46 {
  47         int i;
  48
  49         for(i = 0; i < 50000; ++i) {
  50                 test();
  51         }
  52 }