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Re: [Bug tree-optimization/26626] [4.2 Regression] ICE in in add_virtual_operand
- From: Daniel Berlin <dberlin at dberlin dot org>
- To: gcc-bugzilla at gcc dot gnu dot org
- Cc: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 09 Mar 2006 18:31:37 -0500
- Subject: Re: [Bug tree-optimization/26626] [4.2 Regression] ICE in in add_virtual_operand
- References: <bug-26626-12049@http.gcc.gnu.org/bugzilla/> <20060309225433.16818.qmail@sourceware.org>
On Thu, 2006-03-09 at 22:54 +0000, pinskia at gcc dot gnu dot org wrote:
>
> ------- Comment #3 from pinskia at gcc dot gnu dot org 2006-03-09 22:54 -------
> The difference between copyprop and before is the following.
> Before:
> rv.0_3 = rv.0_2;
> # VUSE <NMT.7_13>;
> D.1900_4 = rv.0_3->d;
>
> After:
> rv.0_3 = rv.0_2;
> # VUSE <SMT.6>;
> D.1900_4 = rv.0_2->d;
This is nonsensical, and very bad.
>
>