Re: optimization/8300: [3.2/3.3/3.4 regression] [sparc] ICE ingen_reg_rtx, at emit-rtl.c:662

["Joseph S. Myers" <jsm28 at cam dot ac dot uk>]

The following reply was made to PR optimization/8300; it has been noted by GNATS.

From: "Joseph S. Myers" <jsm28 at cam dot ac dot uk>
To: Robert Schiele <rschiele at uni-mannheim dot de>
Cc: Andreas Schwab <schwab at suse dot de>, Richard Henderson <rth at redhat dot com>, 
     <gcc-bugs at gcc dot gnu dot org>,  <tneumann at pi3 dot informatik dot uni-mannheim dot de>, 
     <gcc-gnats at gcc dot gnu dot 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 16:53:31 +0000 (GMT)

 On Mon, 17 Mar 2003, Robert Schiele wrote:
 
 > My point, as far as I understand this situation, is that the compiler
 > should generate a binary out of it.  The resulting code is completely
 > braindead --- I know that --- and may even SIGBUS or whatever he likes
 > to do at _runtime_, but I don't see, why this should be seen as
 > illegal at _compile_ time.
 
 Yes.  There is existing precedent (va_arg with bad types) for generating
 an abort for code that provably generates undefined behaviour if ever
 executed, but is OK if never executed.
 
 -- 
 Joseph S. Myers
 jsm28 at cam dot ac dot uk