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Re: Using and clobbering hard regs in parallel
- To: rth at redhat dot com (Richard Henderson)
- Subject: Re: Using and clobbering hard regs in parallel
- From: Joern Rennecke <amylaar at redhat dot com>
- Date: Sat, 21 Jul 2001 01:05:55 +0100 (BST)
- Cc: amylaar at redhat dot com (Joern Rennecke),Stephen dot Clarke at st dot com (Stephen Clarke), gcc at gcc dot gnu dot org,geoffk at geoffk dot org
> No, REG_DEAD talks about inputs only; REG_UNUSED talks about outputs only.
>
> The reason that op might be useful is if we wish to extend the lifetime
> of the original value.
In that case, the first part of the sentence is mismatched. It should be
something like
It does not follow that the original value of register @var{op} is not
available after this insn...