Florian Hahn 62d1a080e6

[LV] Use ExtractLane(LastActiveLane, V) live outs when tail-folding. (#149042) ...

Building on top of https://github.com/llvm/llvm-project/pull/148817,
introduce a new abstract LastActiveLane opcode that gets lowered to
Not(Mask) → FirstActiveLane(NotMask) → Sub(result, 1).

When folding the tail, update all extracts for uses outside the loop the
extract the value of the last actice lane.

See also https://github.com/llvm/llvm-project/issues/148603

PR: https://github.com/llvm/llvm-project/pull/149042

2025-11-12 15:11:00 +00:00

..

SandboxVectorizer

[llvm] Remove "const" in the presence of "constexpr" (NFC) (#166109)

2025-11-02 15:52:44 -08:00

CMakeLists.txt

[LV] Remove EVLIndVarSimplify pass (#160454)

2025-09-25 12:18:20 +08:00

LoadStoreVectorizer.cpp

[LoadStoreVectorizer] Batch alias analysis results to improve compile time (#147555)

2025-07-10 11:23:33 -05:00

LoopIdiomVectorize.cpp

[LoopIdiomVectorize] Fix FindFirstByte successors (#156945)

2025-09-05 14:05:07 +01:00

LoopVectorizationLegality.cpp

[LV] Use ExtractLane(LastActiveLane, V) live outs when tail-folding. (#149042)

2025-11-12 15:11:00 +00:00

LoopVectorizationPlanner.h

[VPlan] Add VPIRMetadata parameter to VPInstruction constructor. (NFC)

2025-11-01 21:57:52 +00:00

LoopVectorize.cpp

[LV] Use ExtractLane(LastActiveLane, V) live outs when tail-folding. (#149042)

2025-11-12 15:11:00 +00:00

SLPVectorizer.cpp

[SLP]Be careful when trying match/vectorize copyable nodes with external uses only

2025-11-11 12:05:56 -08:00

VectorCombine.cpp

[VectorCombine] support mismatching extract/insert indices for foldInsExtFNeg (#126408)

2025-11-07 18:35:40 +00:00

Vectorize.cpp

…

VPlan.cpp

[VPlan] Remove unneeded getDefiningRecipe with isa/cast/dyn_cast. (NFC)

2025-11-11 22:07:48 +00:00

VPlan.h

[LV] Use ExtractLane(LastActiveLane, V) live outs when tail-folding. (#149042)

2025-11-12 15:11:00 +00:00

VPlanAnalysis.cpp

[LV] Use ExtractLane(LastActiveLane, V) live outs when tail-folding. (#149042)

2025-11-12 15:11:00 +00:00

VPlanAnalysis.h

[VPlan] Remove some getCanonicalIV() uses. NFC (#152969)

2025-08-11 18:12:05 +08:00

VPlanCFG.h

[VPlan] Replace reverse RPOT with PO traversal (NFC) (#151757)

2025-08-02 08:46:27 +01:00

VPlanConstruction.cpp

[VPlan] Remove unneeded getDefiningRecipe with isa/cast/dyn_cast. (NFC)

2025-11-11 22:07:48 +00:00

VPlanDominatorTree.h

[VPlan] Strip VPDT's default constructor (NFC) (#162692)

2025-10-13 10:16:05 +00:00

VPlanHelpers.h

[VPlan] Don't apply predication discount to non-originally-predicated blocks (#160449)

2025-11-10 12:10:40 +00:00

VPlanPatternMatch.h

[LV] Use ExtractLane(LastActiveLane, V) live outs when tail-folding. (#149042)

2025-11-12 15:11:00 +00:00

VPlanPredicator.cpp

[LV] Use ExtractLane(LastActiveLane, V) live outs when tail-folding. (#149042)

2025-11-12 15:11:00 +00:00

VPlanRecipes.cpp

[LV] Use ExtractLane(LastActiveLane, V) live outs when tail-folding. (#149042)

2025-11-12 15:11:00 +00:00

VPlanSLP.cpp

Reapply "[VPlan] Add canonical IV during construction (NFC)."

2025-05-03 10:54:59 +01:00

VPlanSLP.h

[llvm] Remove redundant typename (NFC) (#166087)

2025-11-02 13:15:16 -08:00

VPlanTransforms.cpp

[LV] Use ExtractLane(LastActiveLane, V) live outs when tail-folding. (#149042)

2025-11-12 15:11:00 +00:00

VPlanTransforms.h

[VPlan] Plumb scalable register size through narrowInterleaveGroups (#167505)

2025-11-12 11:14:53 +00:00

VPlanUnroll.cpp

[LV] Use ExtractLane(LastActiveLane, V) live outs when tail-folding. (#149042)

2025-11-12 15:11:00 +00:00

VPlanUtils.cpp

[VPlan] Rename onlyFirst(Lane|Part)Used (NFC) (#166562)

2025-11-06 10:07:58 +00:00

VPlanUtils.h

[VPlan] Extend getSCEVForVPV, use to compute VPReplicateRecipe cost. (#161276)

2025-10-30 15:46:19 -07:00

VPlanValue.h

[VPlan] Add getSingleUser helper (NFC).

2025-11-11 21:05:44 +00:00

VPlanVerifier.cpp

[LV] Use ExtractLane(LastActiveLane, V) live outs when tail-folding. (#149042)

2025-11-12 15:11:00 +00:00

VPlanVerifier.h

[llvm] export private symbols needed by unittests (#145767)

2025-07-10 08:20:09 -07:00

VPRecipeBuilder.h

[VPlan] Update more VPRecipeBuilder members to take VPInst directly (NFC)

2025-11-07 21:06:38 +00:00