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Re: [dataflow]: PATCH COMMITTED
Andrew Pinski wrote:
On Wed, 2006-11-15 at 10:54 -0500, Kenneth Zadeck wrote:
The conversation was made on or right before sept 21. Maybe danny can
find the irc log.
I can remember part of the conversation. The issue is that a plain
unspec without a set is always un-deletable instruction.
(insn (unspec (xxxx) )
Should not be deleted even if it does not set anything.
... but, unlike unspec_volatile, is not considered to use and clobber
all hard registers and all of memory.