[llvm] [NFCI][msan] Refactor into 'horizontalReduce' (PR #152961)

[via llvm-commits]

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``````````bash
git-clang-format --diff HEAD~1 HEAD --extensions cpp -- llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
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View the diff from clang-format here.
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diff --git a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
index 5e618fec6..572edf32b 100644
--- a/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
+++ b/llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp
@@ -2690,13 +2690,14 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     SC.Done(&I);
   }
 
- // Perform a bitwise OR on the horizontal pairs (or other specified grouping)
+  // Perform a bitwise OR on the horizontal pairs (or other specified grouping)
   // of elements. This is convenient for instrumenting horizontal add/sub.
   Value *horizontalReduce(IntrinsicInst &I, unsigned ReductionFactor,
-                          Value *VectorA, Value* VectorB) {
+                          Value *VectorA, Value *VectorB) {
     IRBuilder<> IRB(&I);
     assert(isa<FixedVectorType>(VectorA->getType()));
-    unsigned TotalNumElems = cast<FixedVectorType>(VectorA->getType())->getNumElements();
+    unsigned TotalNumElems =
+        cast<FixedVectorType>(VectorA->getType())->getNumElements();
 
     if (VectorB) {
       assert(VectorA->getType() == VectorB->getType());
@@ -2753,8 +2754,8 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     if (I.arg_size() == 2)
       SecondArgShadow = getShadow(&I, 1);
 
-    Value *OrShadow = horizontalReduce(I, /*ReductionFactor=*/ 2,
-                                       FirstArgShadow, SecondArgShadow);
+    Value *OrShadow = horizontalReduce(I, /*ReductionFactor=*/2, FirstArgShadow,
+                                       SecondArgShadow);
 
     OrShadow = CreateShadowCast(IRB, OrShadow, getShadowTy(&I));
 
@@ -2810,12 +2811,11 @@ struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
     Value *SecondArgShadow = nullptr;
     if (I.arg_size() == 2) {
       SecondArgShadow = getShadow(&I, 1);
-      SecondArgShadow = IRB.CreateBitCast(SecondArgShadow,
-                                          ReinterpretShadowTy);
+      SecondArgShadow = IRB.CreateBitCast(SecondArgShadow, ReinterpretShadowTy);
     }
 
-    Value *OrShadow = horizontalReduce(I, /*ReductionFactor=*/ 2,
-                                       FirstArgShadow, SecondArgShadow);
+    Value *OrShadow = horizontalReduce(I, /*ReductionFactor=*/2, FirstArgShadow,
+                                       SecondArgShadow);
 
     OrShadow = CreateShadowCast(IRB, OrShadow, getShadowTy(&I));
 

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https://github.com/llvm/llvm-project/pull/152961