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Re: x86 REG_DEAD note lacking after split
- To: mrs at wrs dot com
- Subject: Re: x86 REG_DEAD note lacking after split
- From: John Wehle <john at feith dot com>
- Date: Tue, 6 Apr 1999 14:26:21 -0400 (EDT)
- Cc: egcs at egcs dot cygnus dot com
>> and when the output is generated there's apparently no REG_DEAD note as
>> the wrong assmbler instruction is used.
>
> I am sorry, you are screwed. REG_DEAD I am led to believe isn't valid
> during insn output. See the threads about dead_or_set_p.
Actually I believe that REG_DEAD notes are valid during insn output for
certain special cases. The reg-stack pass which runs prior to insn output
generates REG_DEAD notes for any registers it handles.
-- John
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