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Re: [RFC/RFA] PR/26830 part 2, delay SSA updating in loop header copying

From: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>
To: Roger Sayle <roger at eyesopen dot com>
Cc: gcc-patches at gcc dot gnu dot org, Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>
Date: Fri, 31 Mar 2006 09:45:19 +0200
Subject: Re: [RFC/RFA] PR/26830 part 2, delay SSA updating in loop header copying
References: <442BEAED.2090303@lu.unisi.ch> <Pine.LNX.4.44.0603300758490.9291-100000@www.eyesopen.com>

Perhaps something like:

+  bool copied_p = false;
...
+      if (tree_duplicate_sese_region (..))
+	copied_p = true;
...

Ok.

Let's wait for Zdenek's opinions and the results of bootstrap
and regression testing, but this change makes sense to me, if
its safe.

Well, bootstrap had already finished when I posted. :-> Regression testing also completed successfully.

Paolo

References:
- [RFC/RFA] PR/26830 part 2, delay SSA updating in loop header copying
  - From: Paolo Bonzini
- Re: [RFC/RFA] PR/26830 part 2, delay SSA updating in loop header copying
  - From: Roger Sayle

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