[DAGCombiner] Prettify with braces and temporaries

Author: pfusik

llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

@@ -12141,15 +12141,17 @@ SDValue DAGCombiner::visitSELECT(SDNode *N) {
     APInt C;
     if (sd_match(Cond1, m_ConstInt(C)) && hasUMin(VT)) {
       if (CC == ISD::SETUGT && Cond0 == N2 &&
-          sd_match(N1, m_Add(m_Specific(N2), m_SpecificInt(~C))))
-        return DAG.getNode(
-            ISD::UMIN, DL, VT,
-            DAG.getNode(ISD::ADD, DL, VT, N2, DAG.getConstant(~C, DL, VT)), N2);
+          sd_match(N1, m_Add(m_Specific(N2), m_SpecificInt(~C)))) {
+        SDValue AddC = DAG.getConstant(~C, DL, VT);
+        SDValue Add = DAG.getNode(ISD::ADD, DL, VT, N2, AddC);
+        return DAG.getNode(ISD::UMIN, DL, VT, Add, N2);
+      }
       if (CC == ISD::SETULT && Cond0 == N1 &&
-          sd_match(N2, m_Add(m_Specific(N1), m_SpecificInt(-C))))
-        return DAG.getNode(
-            ISD::UMIN, DL, VT, N1,
-            DAG.getNode(ISD::ADD, DL, VT, N1, DAG.getConstant(-C, DL, VT)));
+          sd_match(N2, m_Add(m_Specific(N1), m_SpecificInt(-C)))) {
+        SDValue AddC = DAG.getConstant(-C, DL, VT);
+        SDValue Add = DAG.getNode(ISD::ADD, DL, VT, N1, AddC);
+        return DAG.getNode(ISD::UMIN, DL, VT, N1, Add);
+      }
     }
   }