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Author SHA1 Message Date
Roman Lebedev 2d07414ee5
[SimplifyCFG] Teach simplifyUnreachable() to preserve DomTree 
Pretty boring, removeUnwindEdge() already known how to update DomTree,
so if we are to call it, we must first flush our own pending updates;
otherwise, we just stop predecessors from branching to us,
and for certain predecessors, stop their predecessors from
branching to them also.
 2020-12-18 00:37:22 +03:00
David Bolvansky 0290a77aa8 [SimplifyCFG] Added condition assumption for unreachable blocks 
Summary: PR41688

Reviewers: spatel, efriedma, craig.topper, hfinkel, reames

Reviewed By: hfinkel

Subscribers: javed.absar, dmgreen, fhahn, hfinkel, reames, nikic, lebedev.ri, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D61409

llvm-svn: 361707
 2019-05-25 22:34:27 +00:00
David Bolvansky bb76cf0f96 [NFC] Update test checks 
llvm-svn: 361695
 2019-05-25 13:11:22 +00:00