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[VectorCombine] Generalise foldBitOpOfBitcasts into foldBitOpOfCastops

good first issuehttps://github.com/llvm/llvm-project/contributehttps://github.com/llvm/llvm-project/contribute

llvm::vectorcombineCost-based vector combine passCost-based vector combine pass

Status: Open.

Feature

#146037 In llvm/llvm-project;

· RKSimon opened on Jun 27, 2025

[VectorCombine] Expand Intrinsic::vector_insert calls into shufflevectors

good first issuehttps://github.com/llvm/llvm-project/contributehttps://github.com/llvm/llvm-project/contribute

llvm::vectorcombineCost-based vector combine passCost-based vector combine pass

Status: Open.

#145512 In llvm/llvm-project;

· RKSimon opened on Jun 24, 2025

[VectorCombine] New folding pattern for extract/binop/shuffle chains

llvm::vectorcombineCost-based vector combine passCost-based vector combine pass

llvm:transforms

llvm:vectorcombine

vectorizers

Status: Open (in progress).

llvm/llvm-projectnumber 145232

#145232 In llvm/llvm-project;

· Rajveer100 opened on Jun 22, 2025

[VectorCombine] Recognise reduction patterns from extract+binop+shuffle chains

llvm::vectorcombineCost-based vector combine passCost-based vector combine pass

llvm:instcombineCovers the InstCombine, InstSimplify and AggressiveInstCombine passesCovers the InstCombine, InstSimplify and AggressiveInstCombine passes

missed-optimization

Status: Open.

Feature

#144654 In llvm/llvm-project;

· RKSimon opened on Jun 18, 2025

[X86] Remove lowerToAddSubOrFMAddSub and update test coverage

backend:X86

llvm::vectorcombineCost-based vector combine passCost-based vector combine pass

Status: Open.

Task

#144489 In llvm/llvm-project;

· RKSimon opened on Jun 17, 2025

[X86] Remove LowerToHorizontalOp and update test coverage

backend:X86

llvm::vectorcombineCost-based vector combine passCost-based vector combine pass

Status: Open.

Task

#143000 In llvm/llvm-project;

· RKSimon opened on Jun 5, 2025

[VectorCombine] Scalarize extracts of ZExt if profitable.

llvm::vectorcombineCost-based vector combine passCost-based vector combine pass

llvm:transforms

llvm:vectorcombine

vectorizers

Status: Open (in progress).

llvm/llvm-projectnumber 142976

#142976 In llvm/llvm-project;

· fhahn opened on Jun 5, 2025

[VectorCombine] foldInsExtFNeg -support mismatching extract/insert indices

llvm::vectorcombineCost-based vector combine passCost-based vector combine pass

llvm:transforms

missed-optimization

Status: Open.

#125675 In llvm/llvm-project;

· RKSimon opened on Feb 4, 2025

[VectorCombine] foldShuffleToIdentity can't handle BITCAST nodes

llvm::vectorcombineCost-based vector combine passCost-based vector combine pass

llvm:optimizations

missed-optimization

Status: Open.

#96884 In llvm/llvm-project;

· RKSimon opened on Jun 27, 2024