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Re: Designs for better debug info in GCC


On Nov 27, 2007, Michael Matz <matz@suse.de> wrote:

> Hi,
> On Mon, 26 Nov 2007, Alexandre Oliva wrote:

>> >> And then, you have to tweak everything else to keep the note that
>> >> replaced the set up to date as you further optimize the code.
>> 
>> > No.  remove_insn() would replace the SET with a note.
>> 
>> What information would this note convey?

> Oh my, sorry for adding confusion to the topic: I meant to write "would 
> _not_ replace the SET with a note".

Aah, ok.  So, you do indeed completely lose track of the crucial
differences between the two cases for the removal of a SET.  And not
only about their implications, but also about where they ought to take
effect.

-- 
Alexandre Oliva         http://www.lsd.ic.unicamp.br/~oliva/
FSF Latin America Board Member         http://www.fsfla.org/
Red Hat Compiler Engineer   aoliva@{redhat.com, gcc.gnu.org}
Free Software Evangelist  oliva@{lsd.ic.unicamp.br, gnu.org}


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