diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2017-08-24 16:35:02 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2017-08-24 16:35:02 +0000 |
| commit | 5e529592b17880abebd71c233b1cb848c32abeb6 (patch) | |
| tree | 5d10efe4faeda81dd82278472bb9c2c09b8196e4 /lib/CodeGen/SelectionDAG/SelectionDAG.cpp | |
| parent | 15c5c77fa04cd97e1057e8a585f669fc49da0d92 (diff) | |
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 0ff154784f68..16f425dc7969 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -116,7 +116,8 @@ bool ConstantFPSDNode::isValueValidForType(EVT VT, // ISD Namespace //===----------------------------------------------------------------------===// -bool ISD::isConstantSplatVector(const SDNode *N, APInt &SplatVal) { +bool ISD::isConstantSplatVector(const SDNode *N, APInt &SplatVal, + bool AllowShrink) { auto *BV = dyn_cast<BuildVectorSDNode>(N); if (!BV) return false; @@ -124,9 +125,11 @@ bool ISD::isConstantSplatVector(const SDNode *N, APInt &SplatVal) { APInt SplatUndef; unsigned SplatBitSize; bool HasUndefs; - EVT EltVT = N->getValueType(0).getVectorElementType(); - return BV->isConstantSplat(SplatVal, SplatUndef, SplatBitSize, HasUndefs) && - EltVT.getSizeInBits() >= SplatBitSize; + unsigned EltSize = N->getValueType(0).getVectorElementType().getSizeInBits(); + unsigned MinSplatBits = AllowShrink ? 0 : EltSize; + return BV->isConstantSplat(SplatVal, SplatUndef, SplatBitSize, HasUndefs, + MinSplatBits) && + EltSize >= SplatBitSize; } // FIXME: AllOnes and AllZeros duplicate a lot of code. Could these be |