[LLVMdev] bug or expected behaviour?

[Tyler Hardin]

I tried the "extern" specifier, which (I guess) you should use if the
definition isn't in the file; and it worked with -O3.

Input code:
extern void external(void);
void test(char *x)
{
    x--;
    if (!x)
    {
        external();
    }
}

Command:
clang -S -o volatile-test.s -O3 test.c

Output attached.

The only line of interest is probably:
    jmp    external                # TAILCALL
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