diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86ISelLowering.cpp')
| -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 ce88155fdee..c82888ac0bf 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -12805,6 +12805,10 @@ static SDValue LowerINSERT_SUBVECTOR(SDValue Op, const X86Subtarget &Subtarget, // (insert_subvector (insert_subvector undef, (load addr), 0), // (load addr + 16), Elts/2) // --> load32 addr + // or a 16-byte broadcast: + // (insert_subvector (insert_subvector undef, (load addr), 0), + // (load addr), Elts/2) + // --> X86SubVBroadcast(load16 addr) if ((IdxVal == OpVT.getVectorNumElements() / 2) && Vec.getOpcode() == ISD::INSERT_SUBVECTOR && OpVT.is256BitVector() && SubVecVT.is128BitVector()) { @@ -12823,6 +12827,10 @@ static SDValue LowerINSERT_SUBVECTOR(SDValue Op, const X86Subtarget &Subtarget, if (SDValue Ld = EltsFromConsecutiveLoads(OpVT, Ops, dl, DAG, false)) return Ld; } + + // If lower/upper loads are the same then lower to a VBROADCASTF128. + if (SubVec2 == peekThroughBitcasts(SubVec)) + return DAG.getNode(X86ISD::SUBV_BROADCAST, dl, OpVT, SubVec); } } } |
