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Re: paradoxical subreg problem
- From: David Edelsohn <dje at watson dot ibm dot com>
- To: kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner)
- Cc: law at redhat dot com, gcc at gcc dot gnu dot org
- Date: Mon, 28 Jan 2002 15:37:06 -0500
- Subject: Re: paradoxical subreg problem
>>>>> Richard Kenner writes:
Richard> Let me rephrase: why are we genering this if we don't know what those
Richard> bits are?
I agree with Kenner. There are two things we can discuss: should
this ever be generated and should this be generated in this particular
instance causing problems. Regardless whether this compare result can be
determined at compile-time or run-time, if the bits are undefined, why is
GCC generating an expression that relies on undefined bits?
David