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Re: [LTO] patch: new CALL_EXPR abstractions in builtins.c

From: Sandra Loosemore <sandra at codesourcery dot com>
To: Roger Sayle <roger at eyesopen dot com>
Cc: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>, gcc-patches at gcc dot gnu dot org
Date: Wed, 28 Jun 2006 09:38:36 -0400
Subject: Re: [LTO] patch: new CALL_EXPR abstractions in builtins.c
References: <Pine.LNX.4.44.0606280551500.30725-100000@www.eyesopen.com>

Roger Sayle wrote:

Now I appreciate the not every call to fold will/must leak
memory using Sandra's scheme or even on mainline, but I'd hope
the above statistic is surprising enough to most people, to
induce a more accurate sense of respect about what's being
traded-off.  You'll also understand why many middle-end folks
strongly believe that trees should be folded at construction
time, and when modified, rather than repeatedly calling fold
on the same expression.

FWIW, I have been busy implementing Roger's suggestion and changing all the fold_builtin_foo guys to take the individual arguments instead of either a list or the whole CALL_EXPR. I'll be back with a revised patch in a few days.

-Sandra

References:
- Re: [LTO] patch: new CALL_EXPR abstractions in builtins.c
  - From: Roger Sayle

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