Juneyoung Lee d9a4a24413 Add CanonicalizeFreezeInLoops pass ... Summary: If an induction variable is frozen and used, SCEV yields imprecise result because it doesn't say anything about frozen variables. Due to this reason, performance degradation happened after https://reviews.llvm.org/D76483 is merged, causing SCEV yield imprecise result and preventing LSR to optimize a loop. The suggested solution here is to add a pass which canonicalizes frozen variables inside a loop. To be specific, it pushes freezes out of the loop by freezing the initial value and step values instead & dropping nsw/nuw flags from instructions used by freeze. This solution was also mentioned at https://reviews.llvm.org/D70623 . Reviewers: spatel, efriedma, lebedev.ri, fhahn, jdoerfert Reviewed By: fhahn Subscribers: nikic, mgorny, hiraditya, javed.absar, llvm-commits, sanwou01, nlopes Tags: #llvm Differential Revision: https://reviews.llvm.org/D77523		2020-05-21 09:29:29 +09:00
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llvm	Add CanonicalizeFreezeInLoops pass	2020-05-21 09:29:29 +09:00
llvm-c	[SVE] Restore broken LLVM-C ABI compatability	2020-05-15 11:50:24 -07:00