[CFLGraph][NFC] Simplify/reorder switch in visitConstantExpr

Reviewers: hfinkel, efriedma, spatel, dsanders, Danil, rjmccall

Reviewed By: rjmccall

Subscribers: dberlin, llvm-commits

Differential Revision: https://reviews.llvm.org/D46259

llvm-svn: 331312

llvm/lib/Analysis/CFLGraph.h

@@ -515,14 +515,16 @@ template <typename CFLAA> class CFLGraphBuilder {
         visitGEP(*GEPOp);
         break;
       }
+
       case Instruction::PtrToInt: {
-        auto *Ptr = CE->getOperand(0);
-        addNode(Ptr, getAttrEscaped());
+        addNode(CE->getOperand(0), getAttrEscaped());
         break;
       }
-      case Instruction::IntToPtr:
+
+      case Instruction::IntToPtr: {
         addNode(CE, getAttrUnknown());
         break;
+      }
 
       case Instruction::BitCast:
       case Instruction::AddrSpaceCast:
@@ -535,48 +537,23 @@ template <typename CFLAA> class CFLGraphBuilder {
       case Instruction::SIToFP:
       case Instruction::FPToUI:
       case Instruction::FPToSI: {
-        auto *Src = CE->getOperand(0);
-        addAssignEdge(Src, CE);
-        break;
-      }
-      case Instruction::Select: {
-        auto *TrueVal = CE->getOperand(0);
-        auto *FalseVal = CE->getOperand(1);
-        addAssignEdge(TrueVal, CE);
-        addAssignEdge(FalseVal, CE);
-        break;
-      }
-      case Instruction::InsertElement: {
-        auto *Vec = CE->getOperand(0);
-        auto *Val = CE->getOperand(1);
-        addAssignEdge(Vec, CE);
-        addStoreEdge(Val, CE);
-        break;
-      }
-      case Instruction::ExtractElement: {
-        auto *Ptr = CE->getOperand(0);
-        addLoadEdge(Ptr, CE);
+        addAssignEdge(CE->getOperand(0), CE);
         break;
       }
+
+      case Instruction::InsertElement:
       case Instruction::InsertValue: {
-        auto *Agg = CE->getOperand(0);
-        auto *Val = CE->getOperand(1);
-        addAssignEdge(Agg, CE);
-        addStoreEdge(Val, CE);
+        addAssignEdge(CE->getOperand(0), CE);
+        addStoreEdge(CE->getOperand(1), CE);
         break;
       }
+
+      case Instruction::ExtractElement:
       case Instruction::ExtractValue: {
-        auto *Ptr = CE->getOperand(0);
-        addLoadEdge(Ptr, CE);
-        break;
-      }
-      case Instruction::ShuffleVector: {
-        auto *From1 = CE->getOperand(0);
-        auto *From2 = CE->getOperand(1);
-        addAssignEdge(From1, CE);
-        addAssignEdge(From2, CE);
+        addLoadEdge(CE->getOperand(0), CE);
         break;
       }
+
       case Instruction::Add:
       case Instruction::Sub:
       case Instruction::FSub:
@@ -596,9 +573,12 @@ template <typename CFLAA> class CFLGraphBuilder {
       case Instruction::AShr:
       case Instruction::ICmp:
       case Instruction::FCmp:
+      case Instruction::Select:
+      case Instruction::ShuffleVector: {
         addAssignEdge(CE->getOperand(0), CE);
         addAssignEdge(CE->getOperand(1), CE);
         break;
+      }
 
       default:
         llvm_unreachable("Unknown instruction type encountered!");