[llvm] Use llvm::isNullConstant (NFC)

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index 5cf9497..a3667d9 100644 (file)
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -7386,8 +7386,7 @@ static SDValue getMemsetStores(SelectionDAG &DAG, const SDLoc &dl,
   FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(Dst);
   if (FI && !MFI.isFixedObjectIndex(FI->getIndex()))
     DstAlignCanChange = true;
-  bool IsZeroVal =
-      isa<ConstantSDNode>(Src) && cast<ConstantSDNode>(Src)->isZero();
+  bool IsZeroVal = isNullConstant(Src);
   unsigned Limit = AlwaysInline ? ~0 : TLI.getMaxStoresPerMemset(OptSize);
 
   if (!TLI.findOptimalMemOpLowering(

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.h b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.h
index ac5e9d0..a08b0fb 100644 (file)
--- a/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.h
@@ -25,11 +25,7 @@ using namespace llvm;
 namespace {
 
 static inline bool isNullConstantOrUndef(SDValue V) {
-  if (V.isUndef())
-    return true;
-
-  ConstantSDNode *Const = dyn_cast<ConstantSDNode>(V);
-  return Const != nullptr && Const->isZero();
+  return V.isUndef() || isNullConstant(V);
 }
 
 static inline bool getConstantValue(SDValue N, uint32_t &Out) {

diff --git a/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp b/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp
index d361df2..ad072cf 100644 (file)
--- a/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/R600ISelLowering.cpp
@@ -953,10 +953,8 @@ SDValue R600TargetLowering::lowerADDRSPACECAST(SDValue Op,
   unsigned SrcAS = ASC->getSrcAddressSpace();
   unsigned DestAS = ASC->getDestAddressSpace();
 
-  if (auto *ConstSrc = dyn_cast<ConstantSDNode>(Op.getOperand(0))) {
-    if (SrcAS == AMDGPUAS::FLAT_ADDRESS && ConstSrc->isZero())
-      return DAG.getConstant(TM.getNullPointerValue(DestAS), SL, VT);
-  }
+  if (isNullConstant(Op.getOperand(0)) && SrcAS == AMDGPUAS::FLAT_ADDRESS)
+    return DAG.getConstant(TM.getNullPointerValue(DestAS), SL, VT);
 
   return Op;
 }