maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

[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
This commit is contained in:
Sanjay Patel 2019-05-27 18:26:43 +00:00
parent 9c70c574b4
commit e13ae3e4d8
1 changed files with 6 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
View File

@ -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: