gcc/testsuite/gcc.dg/tree-ssa/ssa-dse-43.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O -fdump-tree-dse1-details" } */
   3
   4 struct X { int x; };
   5 struct X x;
   6
   7 extern struct X foo (void);
   8 void bar()
   9 {
  10   x = foo();
  11   x = (struct X){};
  12 }
  13
  14 extern struct X __attribute__((const)) foo2 (int);
  15 void bar2()
  16 {
  17   x = foo2 (1);
  18   x = foo2 (2);
  19 }
  20
  21 /* { dg-final { scan-tree-dump-times "Deleted dead store in call LHS: x = foo " 1 "dse1" } } */
  22 /* { dg-final { scan-tree-dump-times "Deleted dead store: x = foo2 " 1 "dse1" } } */