[Bug other/49666] New: passing nested function to inline function causes a trampoline call

["kevin.waugh at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49666

           Summary: passing nested function to inline function causes a
                    trampoline call
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: other
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: kevin.waugh@gmail.com


#include <stdio.h>
static inline int identity(int (*f)()) {
  return f();
}

int n = 0;
int f() {
  return n;
}

int main() {
  int m = 0;
  int g() {
    return m;
  }
  printf("%d\n", identity(f)); /* inlines all the way */
  printf("%d\n", identity(g)); /* calls g through trampoline */
  printf("%d\n", g()); /* inline's g */
}