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From: Falk Hueffner <falk.hueffner@student.uni-tuebingen.de> To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, Subject: Re: optimization/8300: [3.2/3.3/3.4 regression] [sparc] ICE in gen_reg_rtx, at emit-rtl.c:662 Date: Mon, 17 Mar 2003 17:06:00 -0000 [thread overview] Message-ID: <20030317170601.8451.qmail@sources.redhat.com> (raw) The following reply was made to PR optimization/8300; it has been noted by GNATS. From: Falk Hueffner <falk.hueffner@student.uni-tuebingen.de> To: Robert Schiele <rschiele@uni-mannheim.de> Cc: Richard Henderson <rth@redhat.com>, gcc-bugs@gcc.gnu.org, tneumann@pi3.informatik.uni-mannheim.de, gcc-gnats@gcc.gnu.org Subject: Re: optimization/8300: [3.2/3.3/3.4 regression] [sparc] ICE in gen_reg_rtx, at emit-rtl.c:662 Date: 17 Mar 2003 17:59:25 +0100 Robert Schiele <rschiele@uni-mannheim.de> writes: > On Mon, Mar 17, 2003 at 04:24:34PM +0100, Falk Hueffner wrote: > > Robert Schiele <rschiele@uni-mannheim.de> writes: > > > > > void a() { > > > double b; > > > int c[2]; > > > *((int*)&b) && (c[1] = 0); > > > } > > > > > > Exactly same problem. And this time there is no pointer outside well > > > defined data area. You agree that this sample is legal code? > > > > No, you're violating the rule in 6.5.7 by accessing an object of type > > double with an lvalue of type int. > > 6.5.7? This one is about bitwise shift operators Sorry, I meant 6.5, paragraph 7. > lvalue? b is not used as an lvalue here, is it? No, but you're accessing its value. > Is it generally illegal to do a cast of this type? No, only accessing the resulting object. -- Falk
next reply other threads:[~2003-03-17 17:06 UTC|newest] Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-03-17 17:06 Falk Hueffner [this message] -- strict thread matches above, loose matches on Subject: below -- 2003-04-24 4:23 rth 2003-03-18 20:29 ebotcazou 2003-03-17 17:16 Robert Schiele 2003-03-17 16:56 Joseph S. Myers 2003-03-17 16:26 Robert Schiele 2003-03-17 15:56 Robert Schiele 2003-03-17 15:36 Andreas Schwab 2003-03-17 15:26 Falk Hueffner 2003-03-17 15:26 Robert Schiele 2003-03-17 14:36 Daniel Jacobowitz 2003-03-17 9:26 Robert Schiele 2003-03-17 9:16 Richard Henderson 2003-03-17 5:16 Robert Schiele 2003-03-16 23:27 rth 2003-03-16 23:26 rth
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