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Commits on Oct 20, 2019

• [IndVars] Add a todo to reflect a further oppurtunity identified in D69009

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• [IndVars] Eliminate loop exits with equivalent exit counts

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Commits on Oct 19, 2019

• [SCEV] Simplify umin/max of zext and sext of the same value

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Commits on Oct 17, 2019

• [IndVars] Factor out some common code into a utility function

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• [Test] Precommit test for D69006

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• [IndVars] Split loop predication out of optimizeLoopExits [NFC]

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• [IndVars] Factor out a helper function for readability [NFC]

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Commits on Oct 16, 2019

• Remove a stale comment, noted in post commit review for rL375038

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• [IndVars] Fix a miscompile in off-by-default loop predication implementation

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Commits on Oct 14, 2019

• [Tests] Add a SCEV analysis test for llvm.widenable.condition

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• [Tests] Add a test demonstrating a miscompile in the off-by-default loop-pred transform

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• [Tests] Add a few more tests for idioms with FP induction variables

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Commits on Oct 11, 2019

• [CVP] Remove a masking operation if range information implies it's a noop

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Commits on Oct 9, 2019

• Conservatively add volatility and atomic checks in a few places

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Commits on Oct 5, 2019

• Fix a *nasty* miscompile in experimental unordered atomic lowering

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Commits on Oct 4, 2019

• [Test] Add a test case fo a missed oppurtunity in implicit null checking

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Commits on Oct 3, 2019

• [Tests] Add a unordered atomic load combine test

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• [Test] Fix inconsistency in alignment in test case

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Commits on Oct 1, 2019

• [IndVars] An implementation of loop predication without a need for speculation

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Commits on Sep 24, 2019

• [GCRelocate] Add a peephole to canonicalize base pointer relocation

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Commits on Sep 12, 2019

• [Test] Restructure check lines to show differences between modes more clearly

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• Rename nonvolatile_load/store to simple_load/store [NFC]

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• [SDAG] Update generic code to conservatively check for isAtomic in addition to isVolatile

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• Remove a duplicate test

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• [SCEV] Add smin support to getRangeRef

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• Precommit tests for D67514

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• Precommit tests for generalization of load dereferenceability in loop

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• [LV] Support invariant addresses in speculation logic

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Commits on Sep 10, 2019

• [Loads] Move generic code out of vectorizer into a location it might be reused [NFC]

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• [ValueTracking] Factor our common speculation suppression logic [NFC]

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• [X86] Updated target specific selection dag code to conservatively check for isAtomic in addition to isVolatile

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Commits on Sep 9, 2019

• [Tests] Fix a typo in a test

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• [Tests] Precommit test case for D67372

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• [LoopVectorize] Leverage speculation safety to avoid masked.loads

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• [Tests] Add anyextend tests for unordered atomics

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