[MIPS] Don't dereference dyn_cast<> Constant results. NFCI.

The static analyzer is warning about potential null dereferences, but we should be able to use cast<> directly and if not assert will fire for us.

llvm-svn: 372500

diff --git a/llvm/lib/Target/Mips/MipsSEISelDAGToDAG.cpp b/llvm/lib/Target/Mips/MipsSEISelDAGToDAG.cpp
index 4f34961..f792f40 100644 (file)
--- a/llvm/lib/Target/Mips/MipsSEISelDAGToDAG.cpp
+++ b/llvm/lib/Target/Mips/MipsSEISelDAGToDAG.cpp
@@ -720,7 +720,7 @@ bool MipsSEDAGToDAGISel::trySelect(SDNode *Node) {
   }
 
   case ISD::ConstantFP: {
-    ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(Node);
+    auto *CN = cast<ConstantFPSDNode>(Node);
     if (Node->getValueType(0) == MVT::f64 && CN->isExactlyValue(+0.0)) {
       if (Subtarget->isGP64bit()) {
         SDValue Zero = CurDAG->getCopyFromReg(CurDAG->getEntryNode(), DL,
@@ -744,7 +744,7 @@ bool MipsSEDAGToDAGISel::trySelect(SDNode *Node) {
   }
 
   case ISD::Constant: {
-    const ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Node);
+    auto *CN = cast<ConstantSDNode>(Node);
     int64_t Imm = CN->getSExtValue();
     unsigned Size = CN->getValueSizeInBits(0);