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Commit 28c02407 authored by Richard Biener's avatar Richard Biener Committed by Richard Biener
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re PR tree-optimization/77498 (Performance drop after r239414 on spec2000/172mgrid) 

2017-03-30  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/77498
	* tree-ssa-pre.c (phi_translate_1): Do not allow simplifications
	to non-constants over backedges.

	* gfortran.dg/pr77498.f: New testcase.

From-SVN: r246583
parent e0aa80e0
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