[dfsan] Simplify code after r197677.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197679 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp b/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
index 653ad7ff845ac41c9e1771777cd3f702a460f319..bc089ec09390bfab820a1370aad2f9d24df44bb2 100644 (file)
--- a/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
+++ b/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp
@@ -837,25 +837,20 @@ Value *DataFlowSanitizer::combineShadows(Value *V1, Value *V2,
   IRBuilder<> IRB(Pos);
   BasicBlock *Head = Pos->getParent();
   Value *Ne = IRB.CreateICmpNE(V1, V2);
-  if (Ne) {
-    BranchInst *BI = cast<BranchInst>(SplitBlockAndInsertIfThen(
-        Ne, Pos, /*Unreachable=*/false, ColdCallWeights));
-    IRBuilder<> ThenIRB(BI);
-    CallInst *Call = ThenIRB.CreateCall2(DFSanUnionFn, V1, V2);
-    Call->addAttribute(AttributeSet::ReturnIndex, Attribute::ZExt);
-    Call->addAttribute(1, Attribute::ZExt);
-    Call->addAttribute(2, Attribute::ZExt);
-
-    BasicBlock *Tail = BI->getSuccessor(0);
-    PHINode *Phi = PHINode::Create(ShadowTy, 2, "", Tail->begin());
-    Phi->addIncoming(Call, Call->getParent());
-    Phi->addIncoming(V1, Head);
-    Pos = Phi;
-    return Phi;
-  } else {
-    assert(0 && "todo");
-    return 0;
-  }
+  BranchInst *BI = cast<BranchInst>(SplitBlockAndInsertIfThen(
+      Ne, Pos, /*Unreachable=*/false, ColdCallWeights));
+  IRBuilder<> ThenIRB(BI);
+  CallInst *Call = ThenIRB.CreateCall2(DFSanUnionFn, V1, V2);
+  Call->addAttribute(AttributeSet::ReturnIndex, Attribute::ZExt);
+  Call->addAttribute(1, Attribute::ZExt);
+  Call->addAttribute(2, Attribute::ZExt);
+
+  BasicBlock *Tail = BI->getSuccessor(0);
+  PHINode *Phi = PHINode::Create(ShadowTy, 2, "", Tail->begin());
+  Phi->addIncoming(Call, Call->getParent());
+  Phi->addIncoming(V1, Head);
+  Pos = Phi;
+  return Phi;
 }
 
 // A convenience function which folds the shadows of each of the operands