| /* Verify that NRV optimizations are prohibited when the LHS is |
| something that may be call-clobbered. */ |
| /* { dg-do compile } */ |
| /* { dg-options "-O -fdump-tree-optimized" } */ |
| |
| typedef struct { int x[20]; void *y; } S; |
| typedef struct { int a; S b; } T; |
| S nrv_candidate (void); |
| void use_result (S); |
| void make_escape (S *); |
| void foo (void) |
| { |
| S result; |
| T result_arr[10][5]; |
| |
| make_escape (&result); |
| make_escape (&(result_arr[3][4].b)); |
| |
| /* Neither call should be allowed to use NRV optimization. */ |
| result = nrv_candidate (); |
| result_arr[3][4].b = nrv_candidate (); |
| |
| use_result (result); |
| use_result (result_arr[3][4].b); |
| } |
| |
| /* { dg-final { scan-tree-dump-times "return slot optimization" 0 "optimized" } } */ |
