Re: [RFC/RFA?] Should break FILE:LINENO skip prologue?

Michael Snyder
2008-01-11T20:32:52Z

On Thu, 2008-01-10 at 21:35 -0800, Joel Brobecker wrote:
> > 1. int
> > 2. foo (int i, double d)
> > 3. {
> > 4. int j = 42;
> > 5. float f = sin(d);
> > 6. ...
> > 7. }
> >
> > the first assignment may be scheduled into the prologue, but the
> > second almost certainly won't.
>
> The prologue should never include any of the local variable assignments.
>
> At -O0, the situation is very clear and easy, as the variable
> assignments are always past the prologue. Each variable assignment
> has its own line and you can break on them as usual. My patches
> will not affect that.

Are you sure that's true in general, on all architectures?
I can certainly remember seeing assignment instructions
intermixed with prologue instructions in the past, but I
can't say at what optimization level or on what architecture.