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

[X86][SSE] getShuffleScalarElt - minor NFC cleanup. 

Use SelectionDAG::MaxRecursionDepth instead of (equal) hard coded constant.

clang-format
This commit is contained in:
Simon Pilgrim 2020-05-05 18:34:45 +01:00
parent 055ea585c7
commit 1c4f118d89
1 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -7758,24 +7758,24 @@ static bool getTargetShuffleInputs(SDValue Op, SmallVectorImpl<SDValue> &Inputs,
/// element of the result of the vector shuffle.
static SDValue getShuffleScalarElt(SDNode *N, unsigned Index, SelectionDAG &DAG,
unsigned Depth) {
if (Depth == 6)
return SDValue(); // Limit search depth.
if (Depth >= SelectionDAG::MaxRecursionDepth)
return SDValue(); // Limit search depth.
SDValue V = SDValue(N, 0);
EVT VT = V.getValueType();
unsigned Opcode = V.getOpcode();
// Recurse into ISD::VECTOR_SHUFFLE node to find scalars.
if (const ShuffleVectorSDNode *SV = dyn_cast<ShuffleVectorSDNode>(N)) {
if (auto *SV = dyn_cast<ShuffleVectorSDNode>(N)) {
int Elt = SV->getMaskElt(Index);
if (Elt < 0)
return DAG.getUNDEF(VT.getVectorElementType());
unsigned NumElems = VT.getVectorNumElements();
SDValue NewV = (Elt < (int)NumElems) ? SV->getOperand(0)
: SV->getOperand(1);
return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG, Depth+1);
SDValue NewV =
(Elt < (int)NumElems) ? SV->getOperand(0) : SV->getOperand(1);
return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG, Depth + 1);
}
// Recurse into target specific vector shuffles to find scalars.
@ -7787,7 +7787,8 @@ static SDValue getShuffleScalarElt(SDNode *N, unsigned Index, SelectionDAG &DAG,
SmallVector<SDValue, 16> ShuffleOps;
bool IsUnary;
if (!getTargetShuffleMask(N, ShufVT, true, ShuffleOps, ShuffleMask, IsUnary))
if (!getTargetShuffleMask(N, ShufVT, true, ShuffleOps, ShuffleMask,
IsUnary))
return SDValue();
int Elt = ShuffleMask[Index];
@ -7797,10 +7798,9 @@ static SDValue getShuffleScalarElt(SDNode *N, unsigned Index, SelectionDAG &DAG,
if (Elt == SM_SentinelUndef)
return DAG.getUNDEF(ShufSVT);
assert(0 <= Elt && Elt < (2*NumElems) && "Shuffle index out of range");
assert(0 <= Elt && Elt < (2 * NumElems) && "Shuffle index out of range");
SDValue NewV = (Elt < NumElems) ? ShuffleOps[0] : ShuffleOps[1];
return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG,
Depth+1);
return getShuffleScalarElt(NewV.getNode(), Elt % NumElems, DAG, Depth + 1);
}
// Recurse into insert_subvector base/sub vector to find scalars.