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Commits on Dec 20, 2018

• [X86] Disable custom widening of signed/unsigned add/sub saturation intrinsics under -x86-experimental-vector-widening-legalization.

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Commits on Dec 19, 2018

• [X86] Remove TLI variable from ReplaceNodeResults. NFC

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• [X86] Remove a bunch of 'else' after returns in reduceVMULWidth. NFC

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• [X86] Don't match TESTrr from (cmp (and X, Y), 0) during isel. Defer to post processing

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• [X86] Fix assert fails in pass X86AvoidSFBPass

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Commits on Dec 18, 2018

• [X86] Add BSR to isUseDefConvertible.

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• [X86] Don't use SplitOpsAndApply to create ISD::UADDSAT/ISD::USUBSAT nodes. Let type legalization and op legalization deal with it.

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• [X86] Create PSUBUS from (add (umax X, C), -C)

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• [X86] Add test cases to show isel failing to match BMI blsmsk/blsi/blsr when the flag result is used.

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• [X86] Add test case for PR40060. NFC

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• [X86] Const correct some helper functions X86InstrInfo.cpp. NFC

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Commits on Dec 17, 2018

• [X86] Add baseline tests for D55780

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• [X86] Add T1MSKC and TZMSK to isDefConvertible used by optimizeCompareInstr.

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• [SelectionDAG] Fix noop detection for vectors in AssertZext/AssertSext in getNode

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• Convert (CMP (srl/shl X, C), 0) to (CMP (and X, C'), 0) when only the zero flag is used.

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• [X86] Add test case for PR39968. NFC

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• [X86] Fix bad operand lookup for cmov introduced in r349315

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Commits on Dec 16, 2018

• [X86] Remove truncation handling from EmitTest. Replace it with a DAG combine.

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• [X86] Autogenerate complete checks. NFC

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Commits on Dec 15, 2018

• [X86] Autogenerate complete checks. NFC

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• [X86] Rename hasNoSignedComparisonUses to hasNoSignFlagUses. Add the instruction that only modify the O flag to the waiver list.

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• [X86] Make hasNoCarryFlagUses/hasNoSignedComparisonUses take an SDValue that indicates which result is the flag result. NFCI

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Commits on Dec 14, 2018

• [DAGCombiner][X86] Prevent visitSIGN_EXTEND from returning N when (sext (setcc)) already has the target desired type for the setcc

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Commits on Dec 13, 2018

• [X86] Demote EmitTest to a helper function of EmitCmp. Route all callers except EmitCmp through EmitCmp.

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• [CostModel][X86] Don't count 2 shuffles on the last level of a pairwise arithmetic or min/max reduction

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• [X86] Remove assert leftover from when i1 was a legal type. Add more accurate assert. NFC

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Commits on Dec 12, 2018

• [X86] Don't emit MULX by default with BMI2

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• [X86] Move stack folding test for MULX to a MIR test. Add a MULX32 case as well

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• [X86] Emit SBB instead of SETCC_CARRY from LowerSELECT. Break false dependency on the SBB input.

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• [X86] Combine vpmovdw+vpacksswb into vpmovdb.

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• [X86] Add a few more fptosi test cases to demonstrate -x86-experimental-vector-widening legalization not combining vpacksswb+vpmovdw.

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Commits on Dec 11, 2018

• [GISel] Add parentheses to an assert because gcc is mean.

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• Fix not correct imm operand assertion for SUB32ri in X86CondBrFolding::analyzeCompare

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• [X86] Switch the 64-bit mulx schedule test to use inline assembly.

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Commits on Dec 10, 2018

• [CostModel][X86][AArch64] Adjust cost of the scalarization part of min/max reduction.

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