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Re: [tree-ssa] flowgraph linearization [patch]

From: Diego Novillo <dnovillo at redhat dot com>
To: Richard Henderson <rth at redhat dot com>
Cc: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Date: 01 Apr 2003 07:29:34 -0500
Subject: Re: [tree-ssa] flowgraph linearization [patch]
References: <20030401011413.GA29676@tornado.toronto.redhat.com> <20030401060049.GB25974@redhat.com>

On Tue, 2003-04-01 at 01:00, Richard Henderson wrote:
> On Mon, Mar 31, 2003 at 08:14:13PM -0500, Diego Novillo wrote:
> > +  /* Linearize 'if (1)'.  */
> > +  if (simple_cst_equal (pred, integer_one_node) == 1
> > +	   && body_is_empty (else_clause))
> 
> You should recall that "if (2)" is also true.
> 
No need.  The parser canonicalizes 'if (constant)' to 'if (1)' or 'if
(0)'.

The folder always emits integer_one_node or integer_zero_node when
folding COND_EXPRs.


Diego.

References:
- [tree-ssa] flowgraph linearization [patch]
  - From: Diego Novillo
- Re: [tree-ssa] flowgraph linearization [patch]
  - From: Richard Henderson

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