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| author | Sanjay Patel <spatel@rotateright.com> | 2019-05-27 18:26:43 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2019-05-27 18:26:43 +0000 |
| commit | e13ae3e4d82b95ca1086f658de00402ffb6b128e (patch) | |
| tree | e9989423eddd344712d066969f6c4450d207e1a6 /llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | |
| parent | 9c70c574b4fec75f4c8a530891e6e412e7ad77be (diff) | |
| download | bcm5719-llvm-e13ae3e4d82b95ca1086f658de00402ffb6b128e.tar.gz bcm5719-llvm-e13ae3e4d82b95ca1086f658de00402ffb6b128e.zip | |
[SelectionDAG] fix formatting and redundant comments; NFC
There's a possible missing fold here for extracting from the
same source vector. It's similar to a check that we use to
squash a build vector with all extracted elements from the
same source vector.
llvm-svn: 361778
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 46474b97412..2a4b709858e 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -4138,7 +4138,9 @@ static SDValue FoldBUILD_VECTOR(const SDLoc &DL, EVT VT, return SDValue(); } -static SDValue FoldCONCAT_VECTORS(const SDLoc &DL, EVT VT, +/// Try to simplify vector concatenation to an input value, undef, or build +/// vector. +static SDValue foldCONCAT_VECTORS(const SDLoc &DL, EVT VT, ArrayRef<SDValue> Ops, SelectionDAG &DAG) { assert(!Ops.empty() && "Can't concatenate an empty list of vectors!"); @@ -4989,9 +4991,8 @@ SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, EVT VT, break; } case ISD::CONCAT_VECTORS: { - // Attempt to fold CONCAT_VECTORS into BUILD_VECTOR or UNDEF. SDValue Ops[] = {N1, N2}; - if (SDValue V = FoldCONCAT_VECTORS(DL, VT, Ops, *this)) + if (SDValue V = foldCONCAT_VECTORS(DL, VT, Ops, *this)) return V; break; } @@ -5409,9 +5410,8 @@ SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, EVT VT, break; } case ISD::CONCAT_VECTORS: { - // Attempt to fold CONCAT_VECTORS into BUILD_VECTOR or UNDEF. SDValue Ops[] = {N1, N2, N3}; - if (SDValue V = FoldCONCAT_VECTORS(DL, VT, Ops, *this)) + if (SDValue V = foldCONCAT_VECTORS(DL, VT, Ops, *this)) return V; break; } @@ -7135,8 +7135,7 @@ SDValue SelectionDAG::getNode(unsigned Opcode, const SDLoc &DL, EVT VT, return V; break; case ISD::CONCAT_VECTORS: - // Attempt to fold CONCAT_VECTORS into BUILD_VECTOR or UNDEF. - if (SDValue V = FoldCONCAT_VECTORS(DL, VT, Ops, *this)) + if (SDValue V = foldCONCAT_VECTORS(DL, VT, Ops, *this)) return V; break; case ISD::SELECT_CC: |
