diff options
Diffstat (limited to 'gcc/cgraph.c')
| -rw-r--r-- | gcc/cgraph.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/cgraph.c b/gcc/cgraph.c index 32ad190..470fb5a 100644 --- a/gcc/cgraph.c +++ b/gcc/cgraph.c @@ -2709,6 +2709,33 @@ cgraph_edge_cannot_lead_to_return (struct cgraph_edge *e) return cgraph_node_cannot_return (e->callee); } +/* Return true when function NODE can be removed from callgraph + if all direct calls are eliminated. */ + +bool +cgraph_can_remove_if_no_direct_calls_and_refs_p (struct cgraph_node *node) +{ + /* When function is needed, we can not remove it. */ + if (node->needed || node->reachable_from_other_partition) + return false; + /* Only COMDAT functions can be removed if externally visible. */ + if (node->local.externally_visible + && (!DECL_COMDAT (node->decl) || node->local.used_from_object_file)) + return false; + /* Constructors and destructors are executed by the runtime, however + we can get rid of all pure constructors and destructors. */ + if (DECL_STATIC_CONSTRUCTOR (node->decl) + || DECL_STATIC_DESTRUCTOR (node->decl)) + { + int flags = flags_from_decl_or_type (node->decl); + if (!optimize + || !(flags & (ECF_CONST | ECF_PURE)) + || (flags & ECF_LOOPING_CONST_OR_PURE)) + return false; + } + return true; +} + /* Return true when function NODE can be excpected to be removed from program when direct calls in this compilation unit are removed. |