[possible BUG] gcc's vcg creation code (-dv flag)

["Sunzir Deepur" <sunzird at gmail dot com>]

Hi all,

there is a problem in the vcg file created when compiling the following code
with gcc's -fdump-rtl-stack -dv:

#include <stdio.h>

void fun(void) {
        printf("fun\n");
}

int main(void) {
        fun();
        return 0;
}

the vcg file created has the two nodes "main.0" and "fun.0"
disconnected from the rest of the graph,
i.e. there is no edge from either of them to the rest of the relevant
nodes.

can anyone please hint on why this happen and/or how can
it be fixed ?

thank you
sunzir

ps - i am attaching the original code, the created vcg file, and the rtl file,
for easy reference.

Attachment: main.c
Description: Text document

Attachment: main.c.49.stack.vcg
Description: Text document

Attachment: main.c.49.stack
Description: Text document