From: Dan Nicolaescu <dann@godzilla.ics.uci.edu>
To: "Sanjiv Kumar Gupta, Noida" <sanjivg@noida.hcltech.com>
Cc: Daniel Berlin <dberlin@dberlin.org>,
Dale Johannesen <dalej@apple.com>,
gcc@gcc.gnu.org
Subject: Re: possible gcse failure: not able to eliminate redundant loads
Date: Thu, 12 Dec 2002 21:44:00 -0000 [thread overview]
Message-ID: <200212130641.gBD6fcU20260@amrm2.ics.uci.edu> (raw)
In-Reply-To: <E04CF3F88ACBD5119EFE00508BBB2121061C2FC5@exch-01.noida.hcltech.com>
"Sanjiv Kumar Gupta, Noida" <sanjivg@noida.hcltech.com> writes:
>
> >> We have the code for it, but alias.c isn't helping.
>
> >It looks like memrefs_conflict_p is supposed to be able to prove that
> a[2] and a[4] don't alias, I wonder why it's not working?
>
> It can detect different offsets in 'reg+offset' forms of addresses
> but can not distinguish between two pointer regs.
> In this case, the machine (sh4) doesn't support reg+offset addressing
> for double-precision values.
> I am working on memrefs_conflict_p to handle this.
It works just fine on SPARC, so it might be something specific to your
port...
ldd [%o0+8], %f8
cmp %o2, 2 ! i
bg .LL8
std %f8, [%o1+16]
add %o2, 8, %o2 ! i, i
.LL10:
cmp %o2, 2 ! i
ble,a .LL10
add %o2, 8, %o2 ! i, i
std %f8, [%o0+32]
.LL8:
nop
retl
nop
next prev parent reply other threads:[~2002-12-13 5:35 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-12 21:35 Sanjiv Kumar Gupta, Noida
2002-12-12 21:44 ` Dan Nicolaescu [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-12-21 20:36 Robert Dewar
2002-12-19 7:08 Richard Kenner
2002-12-18 18:39 Robert Dewar
2002-12-19 3:02 ` Richard Henderson
2002-12-21 19:49 ` Alexandre Oliva
2002-12-13 0:39 Sanjiv Kumar Gupta, Noida
2002-12-13 2:42 ` Richard Henderson
2002-12-13 13:10 ` Toon Moene
2002-12-16 10:15 ` Richard Henderson
2002-12-16 11:32 ` Andrew Haley
2002-12-16 13:13 ` Toon Moene
2002-12-16 13:32 ` Richard Henderson
2002-12-16 14:44 ` Toon Moene
2002-12-16 14:48 ` Toon Moene
2002-12-16 15:29 ` Richard Henderson
2002-12-17 15:20 ` Toon Moene
2002-12-16 15:38 ` Jan Hubicka
2002-12-16 16:40 ` Alex Rosenberg
2002-12-12 23:42 Sanjiv Kumar Gupta, Noida
2002-12-11 22:00 Sanjiv Kumar Gupta, Noida
2002-12-11 22:18 ` Daniel Berlin
2002-12-11 20:32 Sanjiv Kumar Gupta, Noida
2002-12-11 3:30 Sanjiv Kumar Gupta, Noida
2002-12-11 14:53 ` Dale Johannesen
2002-12-11 20:02 ` Daniel Berlin
2002-12-11 20:03 ` Daniel Berlin
2002-12-12 12:25 ` Richard Henderson
2002-12-12 12:28 ` Daniel Berlin
2002-12-12 13:03 ` Richard Henderson
2002-12-12 13:04 ` David Edelsohn
2002-12-12 14:32 ` Richard Henderson
2002-12-12 14:42 ` David Edelsohn
2002-12-12 14:58 ` Richard Henderson
2002-12-12 15:28 ` Daniel Berlin
2002-12-13 3:41 ` Richard Henderson
2002-12-12 20:30 ` David Edelsohn
2002-12-12 15:29 ` Geoff Keating
2002-12-11 3:27 Sanjiv Kumar Gupta, Noida
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