| /* { dg-options "-O2 -fdump-tree-modref1 -fdump-tree-optimized" } */ |
| /* { dg-do compile } */ |
| int c; |
| __attribute__ ((noinline)) |
| int *test (int *b) |
| { |
| c++; |
| return *b ? &c : 0; |
| } |
| __attribute__ ((noinline, pure)) |
| int *pure_test (int *b) |
| { |
| return *b && c ? &c : 0; |
| } |
| __attribute__ ((noinline, const)) |
| int *const_test (int *b) |
| { |
| return b ? &c : 0; |
| } |
| void escape (int *); |
| |
| int test2() |
| { |
| int a = 42; |
| escape (test (&a)); |
| escape (pure_test (&a)); |
| escape (const_test (&a)); |
| return a; |
| } |
| /* Flags for normal call. */ |
| /* { dg-final { scan-tree-dump "parm 0 flags: direct noclobber noescape nodirectescape not_returned" "modref1" } } */ |
| /* Flags for pure call. */ |
| /* { dg-final { scan-tree-dump "parm 0 flags: direct not_returned" "modref1" } } */ |
| /* Flags for const call. */ |
| /* { dg-final { scan-tree-dump "parm 0 flags: not_returned" "modref1" } } */ |
| /* Overall we want to make "int a" non escaping. */ |
| /* { dg-final { scan-tree-dump "return 42" "optimized" } } */ |
