[X86] Remove an if check on the result of a cast. NFC

cast takes a non-null input and produces a non-null output. So this if can never fail.

llvm-svn: 317731

diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
index 2a36632..21fee9a 100644 (file)
--- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -2417,12 +2417,9 @@ bool X86DAGToDAGISel::matchBEXTRFromAnd(SDNode *Node) {
     // Update the chain.
     ReplaceUses(Input.getValue(1), SDValue(NewNode, 1));
     // Record the mem-refs
-    LoadSDNode *LoadNode = cast<LoadSDNode>(Input);
-    if (LoadNode) {
-      MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
-      MemOp[0] = LoadNode->getMemOperand();
-      NewNode->setMemRefs(MemOp, MemOp + 1);
-    }
+    MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
+    MemOp[0] = cast<LoadSDNode>(Input)->getMemOperand();
+    NewNode->setMemRefs(MemOp, MemOp + 1);
   } else {
     NewNode = CurDAG->getMachineNode(ROpc, dl, NVT, Input, New);
   }
@@ -2706,12 +2703,9 @@ void X86DAGToDAGISel::Select(SDNode *Node) {
       // Update the chain.
       ReplaceUses(N1.getValue(1), Chain);
       // Record the mem-refs
-      LoadSDNode *LoadNode = cast<LoadSDNode>(N1);
-      if (LoadNode) {
-        MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
-        MemOp[0] = LoadNode->getMemOperand();
-        CNode->setMemRefs(MemOp, MemOp + 1);
-      }
+      MachineSDNode::mmo_iterator MemOp = MF->allocateMemRefsArray(1);
+      MemOp[0] = cast<LoadSDNode>(N1)->getMemOperand();
+      CNode->setMemRefs(MemOp, MemOp + 1);
     } else {
       SDValue Ops[] = { N1, InFlag };
       if (Opc == X86::MULX32rr || Opc == X86::MULX64rr) {