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Re: ICE in change_address at emit_rtl.c
- From: kenner at vlsi1 dot ultra dot nyu dot edu (Richard Kenner)
- To: neil at daikokuya dot demon dot co dot uk
- Cc: gcc at gcc dot gnu dot org
- Date: Sun, 25 Nov 01 08:20:01 EST
- Subject: Re: ICE in change_address at emit_rtl.c
> Right, but note I said *performance*. Even if we do that, we'd lose
> optimization potential in knowing the form of the values.
Why? Can you give a simple example?
No. I said *complex* objects.
Basically if you can look inside a SAVE_EXPR you may be able to deduce that
the value is always a multiple of some power-of-two. Or you may be
able to simplify the expression by merging some divides and multiplies.
It's this sort of thing I'm talking about.