[LLVMdev] disable insertion of unreachables

Kenneth Uildriks kennethuil at gmail.com
Sun Sep 6 14:55:22 PDT 2009

What do you mean by "terminating function call"?  Is it one with the
"noreturn" attribute?  if so, the assembly language docs say that
program behavior is undefined if such a function ever returns.  If
your function could possibly return, it needs to not have that

On Sun, Sep 6, 2009 at 4:49 PM, Max
Stonebraker<max.stonebraker at gmail.com> wrote:
> Hello all,
> LLVM inserts unreachable instructions after every call to a terminating
> function. Is there a way to disable this feature so that it treats
> terminating function calls like any other function call, so the unreachable
> instruction would not be inserted? Unfortunately, simply removing the
> unreachable instructions after the fact would not suffice for my needs
> because I need to preserve the original control flow of the program. That
> is, I need to know the instruction that would have been executed if the call
> to the terminating function didn't actually terminate the program.
> Thanks!
> Max
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