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Re: [Bug tree-optimization/23429] New: Operations involving unsigneds could be simplified
- From: Andrew Pinski <pinskia at physics dot uc dot edu>
- To: gcc-bugzilla at gcc dot gnu dot org
- Cc: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 16 Aug 2005 17:10:32 -0400 (EDT)
- Subject: Re: [Bug tree-optimization/23429] New: Operations involving unsigneds could be simplified
>
> This could just return 1.
>
> $ cat unsigned-arith.c
> int foo(unsigned int *a, unsigned int *b, unsigned int *c)
> {
> unsigned int s1, s2;
>
> s1 = *a + *b;
> s2 = *c + *b;
>
> return s1 + *c == s2 + *a;
> }
The issue here is the reassociater needs to be a fully reassociater
and that has a couple of different bugs about this filed already.
-- Pinski