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Re: KNF and the C preprocessor

On Mon, Dec 10, 2012 at 07:12:36PM -0500, Mouse wrote:
> > I want func() inlined twice so that there are only 2 conditional
> > branches and usually a conditional branch in cmd() back to the loop
> > top in each path.
> Why?  (s/func/cmd/ I assume.)
> > So I need to stop the compiler tail merging the two parts of the
> > inside 'if'
> > There is nothing I can put inside an inline function version of cmd()
> > that will stop this happening.
> There's nothing you can put in a macro that will prevent it, either.
> Or, rather, as far as I can think of, anything you can do in a macro to
> prevent it you can also do in an inline function.  If you have an
> example of something that'll work one way but not the other I'd be
> interested.

An assembler comment - from something like:
asm volatile("; " STR(__LINE__))


David Laight:

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