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Commit 0fa0fdb7 authored by Richard Biener's avatar Richard Biener Committed by Richard Biener
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tree-ssa-sccvn.c (visit_phi): Merge undefined values similar to VN_TOP. 

2017-09-14  Richard Biener  <rguenther@suse.de>

	* tree-ssa-sccvn.c (visit_phi): Merge undefined values similar
	to VN_TOP.

	* gcc.dg/tree-ssa/ssa-fre-59.c: New testcase.
	* gcc.dg/uninit-suppress_2.c: Adjust.
	* gcc.dg/tree-ssa/ssa-sccvn-2.c: Likewise.

From-SVN: r252756
parent 83ada6e8
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