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Commits on May 15, 2019

• [NFC] Reuse a helper function to eliminate duplicate code

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Commits on May 14, 2019

• Use an offset from TOS for idempotent rmw locked op lowering

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• Fix a release mode warning introduced in r360694

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• [IndVars] Extend reasoning about loop invariant exits to non-header blocks

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• [Test] Autogen a test for ease of later changing

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• [X86] Prefer locked stack op over mfence for seq_cst 64-bit stores on 32-bit targets

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Commits on May 10, 2019

• Factor out redzone ABI checks [NFCI]

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Commits on May 9, 2019

• [X86] Improve lowering of idemptotent RMW operations

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• Compile time tweak for libcall lookup

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Commits on May 8, 2019

• [Tests] Landing tests for D58632 to show diffs in review

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Commits on May 7, 2019

• [Tests] Expand coverage of small memset zero idioms

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• [Tests] Yet more combination of tests for unordered.atomic memset

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Commits on May 6, 2019

• [Tests] Add tests for optimized lowerings of element.unordered.atomic memset/memcmove/memcopy

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• [Tests] Rename tests before adding new ones

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• [Tests] Autogen a test in advance of updates

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• Fix pr33010, a 2 year old crashing regression

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Commits on Apr 30, 2019

• [InstCombine] Limit a vector demanded elts rule which was producing invalid IR.

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Commits on Apr 25, 2019

• Consolidate existing utilities for interpreting vector predicate maskes [NFC]

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• [InstCombine] Be consistent w/handling of masked intrinsics style wise [NFC]

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Commits on Apr 23, 2019

• [InstCombine] Convert a masked.load of a dereferenceable address to an unconditional load

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Commits on Apr 22, 2019

• [InstCombine] Eliminate stores to constant memory

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• [InstSimplify] Move masked.gather w/no active lanes handling to InstSimplify from InstCombine

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• [Tests] Revise a test as requested by reviewer in D59703

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• [Tests] Add a negative test for masked.gather part of D59703

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• [LPM/BPI] Preserve BPI through trivial loop pass pipeline (e.g. LCSSA, LoopSimplify)

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Commits on Apr 18, 2019

• [GuardWidening] Wire up a NPM version of the LoopGuardWidening pass

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• [LoopPred] Fix a blatantly obvious bug in r358684

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• [LoopPredication] Allow predication of loop invariant computations (within the loop)

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• Fix a bug in SCEV's isSafeToExpand around speculation safety

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Commits on Apr 17, 2019

• [InstCombine] Factor out unreachable inst idiom creation [NFC]

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Commits on Apr 16, 2019

• [Tests] Add branch_weights to latches so that test is not effected by future profitability patch to LoopPredication

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Commits on Apr 15, 2019

• [Tests] Add a few more tests for LoopPredication w/invariant loads

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• [LoopPred] Stop passing around builders [NFC]

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• [LoopPred] Hoist and of predicated checks where legal

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Commits on Apr 13, 2019

• [Tests] Add tests for D60659, and make adjustments to others to make diff clear

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