fix format, fix undef in test

Author: mjulian31

llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp

@@ -153,10 +153,10 @@ Instruction *InstCombinerImpl::scalarizePHI(ExtractElementInst &EI,
       // non-commutative operations.
       Value *FirstOp = (B0->getOperand(0) == PN) ? scalarPHI : Op;
       Value *SecondOp = (B0->getOperand(0) == PN) ? Op : scalarPHI;
-      Value *newPHIUser = InsertNewInstWith(
-          BinaryOperator::CreateWithCopiedFlags(B0->getOpcode(),
-                                                FirstOp, SecondOp, B0),
-          B0->getIterator());
+      Value *newPHIUser =
+          InsertNewInstWith(BinaryOperator::CreateWithCopiedFlags(
+                                B0->getOpcode(), FirstOp, SecondOp, B0),
+                            B0->getIterator());
       scalarPHI->addIncoming(newPHIUser, inBB);
     } else {
       // Scalarize PHI input:

llvm/test/Transforms/InstCombine/scalarization.ll

@@ -130,9 +130,8 @@ define void @scalarize_phi_sub(ptr %n, ptr %inout) {
 ;
 entry:
   %t0 = load volatile float, ptr %inout, align 4
-  %insert = insertelement <4 x float> undef, float %t0, i32 0
-  %splat = shufflevector <4 x float> %insert, <4 x float> undef, <4 x i32> zeroinitializer
-  %insert1 = insertelement <4 x float> undef, float 3.0, i32 0
+  %insert = insertelement <4 x float> poison, float %t0, i32 0
+  %splat = shufflevector <4 x float> %insert, <4 x float> poison, <4 x i32> zeroinitializer
   br label %for.cond
 
 for.cond: