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Re: [4.1/4.0/3.4] fix pr19672 by tuning expansion of TRUTH_{AND,OR}_EXPR

From: Eric Botcazou <ebotcazou at adacore dot com>
To: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>
Cc: gcc-patches at gcc dot gnu dot org
Date: Fri, 21 Oct 2005 12:35:14 +0200
Subject: Re: [4.1/4.0/3.4] fix pr19672 by tuning expansion of TRUTH_{AND,OR}_EXPR
References: <10510201740.AA26284@vlsi1.ultra.nyu.edu> <200510201948.44979.ebotcazou@adacore.com> <4358996C.8030701@lu.unisi.ch>

> On 4.0/4.1 an expression without TREE_SIDE_EFFECTS would have confused
> the tree-ssa optimizers beyond any recognition.  Even though I'm
> surprised that such a TRUTH_AND_EXPR can be produced at all!

In Ada?

> BTW, is it triggered by some ACATS test, so I can look at a test case?  I
> couldn't find any new ACATS failures on test-results.

We detected the problem internally on the 3.4 branch.  Dunno if it showed up 
in the ACATS testsuite.

-- 
Eric Botcazou

Follow-Ups:
- Re: [4.1/4.0/3.4] fix pr19672 by tuning expansion of TRUTH_{AND,OR}_EXPR
  - From: Paolo Bonzini

References:
- Re: [4.1/4.0/3.4] fix pr19672 by tuning expansion of TRUTH_{AND,OR}_EXPR
  - From: Richard Kenner
- Re: [4.1/4.0/3.4] fix pr19672 by tuning expansion of TRUTH_{AND,OR}_EXPR
  - From: Eric Botcazou
- Re: [4.1/4.0/3.4] fix pr19672 by tuning expansion of TRUTH_{AND,OR}_EXPR
  - From: Paolo Bonzini

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