fix 'COMMON' variables in cparser

[r27033]

diff --git a/ast2firm.c b/ast2firm.c
index e699f4a..764ea68 100644 (file)
--- a/ast2firm.c
+++ b/ast2firm.c
@@ -4549,6 +4549,9 @@ static void create_global_variable(entity_t *entity)
        ir_type *var_type = entity->variable.thread_local ?
                get_tls_type() : get_glob_type();
        create_variable_entity(entity, DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
+       /* uninitialized globals get merged in C */
+       if (entity->variable.initializer == NULL)
+               linkage |= IR_LINKAGE_MERGE;
        add_entity_linkage(entity->variable.v.entity, linkage);
 }