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cc35812877
Summary: This patch fixes PR23405 (https://llvm.org/bugs/show_bug.cgi?id=23405). During a node unscheduling an entry in LiveRegGens can be replaced with a new value. That corrupts the live reg tracking and LiveReg* structure is not cleared as should be during unscheduling. Problematic condition that enforces Gen replacement is `I->getSUnit()->getHeight() < LiveRegGens[I->getReg()]->getHeight()`. This condition should be checked only if LiveRegGen was set in current node unscheduling. Test Plan: Regression test included. Reviewers: hfinkel, atrick Reviewed By: atrick Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D9993 llvm-svn: 240538 |
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