Bjorn Pettersson 4613d4bf95 [LoadCombine] Avoid analysing dead basic blocks ... Summary: Dead basic blocks may be forming a loop, for which SSA form is fulfilled, but with a circular def-use chain. LoadCombine could enter an infinite loop when analysing such dead code. This patch solves the problem by simply avoiding to analyse all basic blocks that aren't forward reachable, from function entry, in LoadCombine. Fixes https://bugs.llvm.org/show_bug.cgi?id=27065 Reviewers: mehdi_amini, chandlerc, grosser, Bigcheese, davide Reviewed By: davide Subscribers: dberlin, zzheng, bjope, grandinj, Ka-Ka, materi, jholewinski, llvm-commits, mzolotukhin Differential Revision: https://reviews.llvm.org/D31032 llvm-svn: 300034		2017-04-12 08:07:55 +00:00
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deadcode.ll	[LoadCombine] Avoid analysing dead basic blocks	2017-04-12 08:07:55 +00:00
load-combine-aa.ll
load-combine-assume.ll
load-combine-negativegep.ll
load-combine.ll