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Re: strict aliasing benefit examples

From: Robert Dewar <dewar at adacore dot com>
To: Richard Kenner <kenner at vlsi1 dot ultra dot nyu dot edu>
Cc: acahalan at gmail dot com, gcc at gcc dot gnu dot org, paolo dot bonzini at lu dot unisi dot ch
Date: Wed, 29 Nov 2006 13:29:56 -0500
Subject: Re: strict aliasing benefit examples
References: <787b0d920611281852r60d1c722g7e717b379bea60e4@mail.gmail.com> <200611290320.kAT3Ko40016129@localhost.localdomain> <787b0d920611282001m7882a8fdqae64c03d25388f24@mail.gmail.com> <456D3A05.1050102@lu.unisi.ch> <787b0d920611290947w5d4ad88dp7a6ebeb7f775e8b@mail.gmail.com> <10611291814.AA20952@vlsi1.ultra.nyu.edu>

Richard Kenner wrote:

Since humans have to do a bit of alias analysis when maintaining
or writing code, the extra clarity of pulling things into temporary
variables isn't wasted.


Sorry, I don't follow.  Why should we want to do "a bit of alias analysis"
when maintaining or writing code?  It would seem a far better practice to
leave that to the optimizer and use local variables only when necessary
for clarify.


And while we are at it, write code in C, instead of some ill-defined
variant of it!

References:
- strict aliasing benefit examples
  - From: Albert Cahalan
- Re: strict aliasing benefit examples
  - From: Andrew Pinski
- Re: strict aliasing benefit examples
  - From: Albert Cahalan
- Re: strict aliasing benefit examples
  - From: Paolo Bonzini
- Re: strict aliasing benefit examples
  - From: Albert Cahalan
- Re: strict aliasing benefit examples
  - From: Richard Kenner

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