From: Alan Modra <amodra@gmail.com>
To: Bernd Schmidt <bernds@codesourcery.com>
Cc: gcc-patches@gcc.gnu.org, Richard Henderson <rth@redhat.com>
Subject: Re: PowerPC shrink-wrap support 3 of 3
Date: Tue, 27 Sep 2011 00:49:00 -0000 [thread overview]
Message-ID: <20110927001120.GM10321@bubble.grove.modra.org> (raw)
In-Reply-To: <4E80FF28.2070509@codesourcery.com>
On Tue, Sep 27, 2011 at 12:39:36AM +0200, Bernd Schmidt wrote:
> On 09/27/11 00:32, Alan Modra wrote:
> > On Mon, Sep 26, 2011 at 11:22:54PM +0930, Alan Modra wrote:
> >> Two regressions appeared due to a problem in the shrink-wrap code.
> >
> > These two.
> > +FAIL: g++.dg/torture/pr46111.C -O1 (internal compiler error)
> > +FAIL: gcc.dg/autopar/pr46099.c (internal compiler error)
> >
> > Both "internal compiler error: in maybe_record_trace_start, at
> > dwarf2cfi.c:2243", caused by disjoint blocks in the set of blocks that
> > needs no prologue. ie. thread_prologue_and_epilogue_insns gives
> >
> > ====
> > code needing no prologue
> > ==== <- prologue inserted here
> > code needing prologue
> > ====
> > more no prologue code
> > ====
> > more code needing prologue
> > ====
> > epilogue
> >
> > That second block needing no prologue now wrongly tries to use unwind
> > info from the prologue.
>
> What's the actual CFG structure here?
Immediately after thread_prologue_and_epilogue_insns
bb2 -> simple_ret
|
bb3
/\
/ \
bb4 bb5
(pro) |
| |<--|
bb7 | |
(epi) bb6--|
| |
bb8<-| |
(s ret)| |
|-bb9
--
Alan Modra
Australia Development Lab, IBM
next prev parent reply other threads:[~2011-09-27 0:11 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-17 7:59 PowerPC shrink-wrap support 0 " Alan Modra
2011-09-17 8:22 ` PowerPC shrink-wrap support 1 " Alan Modra
2011-09-17 9:13 ` PowerPC shrink-wrap support 2 " Alan Modra
2011-09-17 9:26 ` PowerPC shrink-wrap support 3 " Alan Modra
2011-09-26 14:25 ` Alan Modra
2011-09-27 0:15 ` Alan Modra
2011-09-27 0:19 ` Bernd Schmidt
2011-09-27 0:49 ` Alan Modra [this message]
2011-09-27 1:08 ` Bernd Schmidt
2011-09-27 2:16 ` Alan Modra
2011-09-28 16:35 ` Alan Modra
2011-10-16 20:19 ` David Edelsohn
2011-10-26 13:03 ` Alan Modra
2011-10-26 13:42 ` Bernd Schmidt
2011-10-26 14:40 ` Alan Modra
2011-10-26 14:44 ` Bernd Schmidt
2011-10-26 15:40 ` Alan Modra
2011-10-28 0:41 ` Alan Modra
2011-10-31 15:14 ` Alan Modra
2011-11-01 15:34 ` Alan Modra
2011-11-07 17:27 ` Jakub Jelinek
2011-11-09 9:48 ` Hans-Peter Nilsson
2011-11-10 11:25 ` Revert "PowerPC shrink-wrap support 3 of 3" Hans-Peter Nilsson
2011-11-10 12:10 ` Richard Guenther
2011-11-10 13:29 ` Hans-Peter Nilsson
2011-11-10 13:44 ` Richard Guenther
2011-11-10 14:13 ` Bernd Schmidt
2011-11-10 15:23 ` Hans-Peter Nilsson
2011-11-10 18:06 ` Hans-Peter Nilsson
2011-11-11 22:09 ` Hans-Peter Nilsson
2011-11-14 14:59 ` Bernd Schmidt
2011-11-14 16:49 ` CFG review needed for fix of " Hans-Peter Nilsson
2011-11-14 17:06 ` Ramana Radhakrishnan
2011-11-14 17:15 ` Rainer Orth
2011-11-14 18:21 ` Richard Henderson
2011-11-14 22:44 ` Alan Modra
2011-11-15 2:50 ` Hans-Peter Nilsson
2011-11-15 5:03 ` Richard Henderson
2011-11-15 6:11 ` Bernd Schmidt
2011-11-15 7:09 ` David Miller
2011-11-15 18:54 ` Richard Henderson
2011-11-15 0:45 ` Hans-Peter Nilsson
2011-11-11 0:22 ` Revert " Michael Meissner
2015-04-08 11:11 ` Gerald Pfeifer
2011-09-17 18:16 ` PowerPC shrink-wrap support 0 of 3 Bernd Schmidt
2011-09-19 5:39 ` Alan Modra
2011-09-19 13:36 ` Bernd Schmidt
[not found] ` <20110921152851.GE10321@bubble.grove.modra.org>
[not found] ` <20110922144017.GF10321@bubble.grove.modra.org>
2011-09-26 14:35 ` [PATCH] PowerPC shrink-wrap support benchmark gains Alan Modra
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