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[Bug middle-end/5169] paradoxical subreg problem
- From: "schlie at comcast dot net" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 20 Feb 2005 06:50:54 -0000
- Subject: [Bug middle-end/5169] paradoxical subreg problem
- References: <20011221052601.5169.klaus.k.pedersen@nokia.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From schlie at comcast dot net 2005-02-20 06:50 -------
(In reply to comment #8)
> - nor does it seem to make sence in any circumstance to referance a wider
> logical value than may be stored in a register or memory, without presuming
> it's higher-order bits are of some known value (unless it's known that they're
> logical value were to be effectivly replaced by the operation without regard to
> it's initial value)?
... or known not affect the operation (as would be typical of a shift count likely
never requiring more than a QI mode operand, although paradoxically a wider
operand may be formally required.) (it would seem)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=5169