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Re: [PATCH] Fix bootstrap on i686-pc-linux-gnu
- From: Jakub Jelinek <jakub at redhat dot com>
- To: Joern RENNECKE <joern dot rennecke at st dot com>
- Cc: Richard Henderson <rth at redhat dot com>, gcc-patches at gcc dot gnu dot org, gcc at gcc dot gnu dot org, Martin Reinecke <martin at MPA-Garching dot MPG dot DE>, Laurent GUERBY <laurent at guerby dot net>
- Date: Tue, 13 Dec 2005 16:29:21 -0500
- Subject: Re: [PATCH] Fix bootstrap on i686-pc-linux-gnu
- References: <439F24E3.6050307@st.com> <439F33F4.2010402@st.com> <20051213212050.GR31785@devserv.devel.redhat.com> <439F3C59.7030403@st.com>
- Reply-to: Jakub Jelinek <jakub at redhat dot com>
On Tue, Dec 13, 2005 at 09:25:45PM +0000, Joern RENNECKE wrote:
> >While we could use pushhi2 insn
> >(would need to use pre_modify rather than pre_dec etc.), it wouldn't
> >buy us anything.
> >
> Presumably, it would prevent a partial register stall.
Only if we use the real pushw instruction. But in that case
unwind info can't represent the stack movement.
Jakub