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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2025-03-08 17:10:39 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-03-08 17:10:39 +0000 |
| commit | b15e7f3c23bfffe3b4a0180b5433bf5a876b87ae (patch) | |
| tree | 98e69817b159f35c416c7b378d820da49ac27193 /llvm/lib | |
| parent | 037756242f6eb3cdd6e73ab6597651f87aa7b933 (diff) | |
| download | llvm-b15e7f3c23bfffe3b4a0180b5433bf5a876b87ae.zip llvm-b15e7f3c23bfffe3b4a0180b5433bf5a876b87ae.tar.gz llvm-b15e7f3c23bfffe3b4a0180b5433bf5a876b87ae.tar.bz2 | |
[X86] combineINSERT_SUBVECTOR - attempt to recursively shuffle combine if both base/sub-vectors are already shuffles (#130304)
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelLowering.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 0602f50..f9661b0 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -58758,6 +58758,14 @@ static SDValue combineINSERT_SUBVECTOR(SDNode *N, SelectionDAG &DAG, } } + // Attempt to recursively combine to a shuffle. + if (isTargetShuffle(peekThroughBitcasts(Vec).getOpcode()) && + isTargetShuffle(peekThroughBitcasts(SubVec).getOpcode())) { + SDValue Op(N, 0); + if (SDValue Res = combineX86ShufflesRecursively(Op, DAG, Subtarget)) + return Res; + } + return SDValue(); } |