gcc/testsuite/g++.dg/tree-ssa/pr28003.C

   1 // PR tree-optimization/28003
   2 // Alias grouping needs to be computed after call clobbering, because it
   3 // changes around the tags and variables in a way that makes our
   4 // call clobbering computation incorrect.
   5 // { dg-do run }
   6 // { dg-options "-O2" }
   7 extern "C" void abort(void);
   8 struct A
   9 {
  10   int i, j[9];
  11   A() : i(1) { j[0]=j[1]=j[2]=j[3]=j[4]=j[5]=j[6]=j[7]=j[8]=0; }
  12 };
  13
  14 struct B
  15 {
  16   A a;
  17 };
  18
  19 B b[] =
  20 {
  21   {}, {}, {}, {}, {}, {}, {}, {}, {}, {},
  22   {}, {}, {}, {}, {}, {}, {}, {}, {}, {},
  23   {}, {}, {}, {}, {}
  24 };
  25
  26 int main()
  27 {
  28   if (1 - b[sizeof(b)/sizeof(B) - 1].a.i != 0)
  29     abort();
  30   return 0;
  31 }