1 /* { dg-do compile } */ 2 /* { dg-options "-O -fno-tree-ccp -fdump-tree-forwprop1" } */ 3 foo(int x)4int foo (int x) 5 { 6 int y = 0; 7 int z = x + 1; 8 int w = z + y; /* becomes z */ 9 return w - z; /* becomes 0 */ 10 } 11 12 /* The original y = 0 stmt is also retained. */ 13 /* { dg-final { scan-tree-dump-times "= 0;" 2 "forwprop1" } } */ 14 /* { dg-final { scan-tree-dump-times "-" 0 "forwprop1" } } */ 15 /* { dg-final { scan-tree-dump-times "\\+" 1 "forwprop1" } } */ 16