From: Eric Botcazou <ebotcazou@adacore.com>
To: gcc-patches@gcc.gnu.org
Subject: Re: [PATCH] Fix ICE in simplify_immed_subreg on SPU
Date: Sun, 15 Jun 2008 17:27:00 -0000 [thread overview]
Message-ID: <200806151801.56141.ebotcazou@adacore.com> (raw)
In-Reply-To: <200806151546.m5FFksow018979@d12av02.megacenter.de.ibm.com>
> the test cases for PR 34856 ICE on SPU because simplify_subreg is
> called on a CONST_VECTOR RTX of the form:
>
> (const_vector:V4SI [
> (const:SI (plus:SI (symbol_ref:SI ("g") [flags 0x40] <var_decl
> 0xf70b05a0 g>) (const_int 32 [0x20])))
> (const_int 0 [0x0])
> (const_int 0 [0x0])
> (const_int 0 [0x0])
> ])
>
> and everything but CONST_INT, CONST_DOUBLE or CONST_FIXED within
> a CONST_VECTOR leads to an ICE in simplify_immed_subreg.
>
> It seems to me that having an address constant like the above appear
> within a CONST_VECTOR should be OK -- it just cannot be simplified
> by simplify_immed_subreg so that function should return NULL_RTX.
No, we already ran into this on x86, CONST_VECTOR should only contain the
aforementioned 3 kinds of constants.
--
Eric Botcazou
next prev parent reply other threads:[~2008-06-15 16:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-15 15:53 Ulrich Weigand
2008-06-15 17:27 ` Eric Botcazou [this message]
2008-06-15 17:43 ` Ulrich Weigand
2008-06-15 22:24 ` Eric Botcazou
2008-06-15 22:25 ` Ian Lance Taylor
2008-06-15 22:45 ` Eric Botcazou
2008-06-15 22:49 ` Andrew Pinski
2008-06-26 22:15 ` [PATCH, v2] " Ulrich Weigand
2008-06-26 23:14 ` trevor_smigiel
2008-06-27 7:05 ` Eric Botcazou
2008-06-28 17:53 ` Ulrich Weigand
2008-06-30 8:27 ` Eric Botcazou
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