[SLP] Fix for PR31690: Allow using of extra values in horizontal reductions.

[ABataev]

Summary

Currently, LLVM supports vectorization of horizontal reduction
instructions with initial value set to 0. Patch supports vectorization
of reduction with non-zero initial values. Also, it supports a
vectorization of instructions with some extra arguments, like:

float f(float x[], int a, int b) {
  float p = a % b;
  p += x[0] + 3;
  for (int i = 1; i < 32; i++)
    p += x[i];
  return p;
}

Patch allows vectorization of this kind of horizontal reductions.

[mkuper]

So, I understand you decided to vectorize the failing case, instead of bailing on it?
I'm not sure this is a good idea. I'm pretty sure I can craft a test-case where this will retain all of the scalar computation, in addition to performing the scalar one (e.g. have all of %x1 - %x4 as extra arguments). If I understand this code correctly, the cost model will not get adjusted for this, so you'll end up vectorizing cases you really don't want to vectorize, just so you can perform the vector reduction.

Why do you prefer not to bail?

[ABataev]

In D29727#671394, @mkuper wrote:

So, I understand you decided to vectorize the failing case, instead of bailing on it?
I'm not sure this is a good idea. I'm pretty sure I can craft a test-case where this will retain all of the scalar computation, in addition to performing the scalar one (e.g. have all of %x1 - %x4 as extra arguments). If I understand this code correctly, the cost model will not get adjusted for this, so you'll end up vectorizing cases you really don't want to vectorize, just so you can perform the vector reduction.

Why do you prefer not to bail?

You're not quite correct. For all extra args I'm creating a virtual instruction user (it is not an instruction actually, but a MapVector<Value *, DebugLoc> ExternallyUsedValues). In function buildTree() if the scalar is found in this MapVector, it is considered as externally used and added to the list of the externally used values with nullptr user (because it is not generated yet, see lines 971-977).

Each new External use registered in ExternalUses list adds a cost of extractvalue instruction (see function getTreeCost(), lines 1973-2000). So, this external use is taken into account in the cost model already.

If cost model allows vectorization with this extra extractvalue instruction, we start vectorization and when extractvalue instruction is generated, we replace the reference to extra arg in ExternallyUsedValues MapVector to this newly generated instruction/value (see lines 2848-2862).

After vectorization we pass all values stored in ExternallyUsedValues MapVector and add extra args/extractvalue extra args to the final reduction value (see lines 4469-4473).

[ABataev]

Added some more comments

[mkuper]

Oh, ok, I see what's going on now. I've misread the test result, and didn't notice how it's being treated. Sorry for the noise.
(It would have been easier, though, if you updated the patch description and/or added documentation to the original patch, instead of just reusing the description of the original commit).

Some minor comments inline.

lib/Transforms/Vectorize/SLPVectorizer.cpp

2858

Please also change the documentation of ExternalUses to explain that a nullptr "User" is legal, and what it means (Line 589).

2862

Add a meaningful message to the assert.

2864

I guess it's impossible for Vec to be a PHI here, because the real user is going to be a reduction operation, right?
If so, how is it possible for it to be a non-Instruction?

2867

I'd say either have no braces, or braces for both the if and the else block - this looks a bit weird.

[mkuper]

lib/Transforms/Vectorize/SLPVectorizer.cpp

2864

Er, actually, what I wrote above doesn't make sense.
Why can't it be a Phi?

[ABataev]

lib/Transforms/Vectorize/SLPVectorizer.cpp

2864

It does not matter for Vec is it a PHI or not (PHI is an instruction also), it can be a constant, I believe, which is not an instruction.

[ABataev]

Update after review

[mkuper]

LGTM

lib/Transforms/Vectorize/SLPVectorizer.cpp

2864

If VecI is a PHI, std::next(VecI->getIterator()) may not be a valid insertion point, but, never mind, I realized VecI can't be a phi anyway (and below, we don't care about the case VecI is a phi, we care about the case the User is a phi...).
Never mind this.

lib/Transforms/Vectorize/SLPVectorizer.cpp

else
       MaxVecRegSize = TTI->getRegisterBitWidth(true);
 
     MinVecRegSize = MinVectorRegSizeOption;
   }
 
   /// \brief Vectorize the tree that starts with the elements in \p VL.
   /// Returns the vectorized root.
   Value *vectorizeTree();
+  /// Vectorize the tree but with the list of externally used values \p
+  /// ExternallyUsedValues. Values in this MapVector can be replaced but the
+  /// generated extractvalue instructions.
+  Value *vectorizeTree(MapVector<Value *, DebugLoc> &ExternallyUsedValues);
 
   /// \returns the cost incurred by unwanted spills and fills, caused by
   /// holding live values over call sites.
   int getSpillCost();
 
   /// \returns the vectorization cost of the subtree that starts at \p VL.
   /// A negative number means that this is profitable.
   int getTreeCost();
 
   /// Construct a vectorizable tree that starts at \p Roots, ignoring users for
   /// the purpose of scheduling and extraction in the \p UserIgnoreLst.
   void buildTree(ArrayRef<Value *> Roots,
                  ArrayRef<Value *> UserIgnoreLst = None);
+  /// Construct a vectorizable tree that starts at \p Roots, ignoring users for
+  /// the purpose of scheduling and extraction in the \p UserIgnoreLst taking
+  /// into account (anf updating it, if required) list of externally used
+  /// values stored in \p ExternallyUsedValues.
+  void buildTree(ArrayRef<Value *> Roots,
+                 MapVector<Value *, DebugLoc> &ExternallyUsedValues,
+                 ArrayRef<Value *> UserIgnoreLst = None);
 
   /// Clear the internal data structures that are created by 'buildTree'.
   void deleteTree() {
     VectorizableTree.clear();
     ScalarToTreeEntry.clear();
     MustGather.clear();
     ExternalUses.clear();
     NumLoadsWantToKeepOrder = 0;
void eraseInstruction(Instruction *I) {
     DeletedInstructions.push_back(std::unique_ptr<Instruction>(I));
   }
 
   /// Temporary store for deleted instructions. Instructions will be deleted
   /// eventually when the BoUpSLP is destructed.
   SmallVector<std::unique_ptr<Instruction>, 8> DeletedInstructions;
 
   /// A list of values that need to extracted out of the tree.
-  /// This list holds pairs of (Internal Scalar : External User).
+  /// This list holds pairs of (Internal Scalar : External User). External User
+  /// can be nullptr, it means that this Internal Scalar will be used later,
+  /// after vectorization.
   UserList ExternalUses;
 
   /// Values used only by @llvm.assume calls.
   SmallPtrSet<const Value *, 32> EphValues;
 
   /// Holds all of the instructions that we gathered.
   SetVector<Instruction *> GatherSeq;
   /// A list of blocks that we are going to CSE.
#endif
   MapVector<Value *, std::pair<uint64_t, bool>> MinBWs;
 };
 
 } // end namespace llvm
 } // end namespace slpvectorizer
 
 void BoUpSLP::buildTree(ArrayRef<Value *> Roots,
                         ArrayRef<Value *> UserIgnoreLst) {
+  MapVector<Value *, DebugLoc> ExternallyUsedValues;
+  buildTree(Roots, ExternallyUsedValues, UserIgnoreLst);
+}
+void BoUpSLP::buildTree(ArrayRef<Value *> Roots,
+                        MapVector<Value *, DebugLoc> &ExternallyUsedValues,
+                        ArrayRef<Value *> UserIgnoreLst) {
   deleteTree();
   UserIgnoreList = UserIgnoreLst;
   if (!allSameType(Roots))
     return;
   buildTree_rec(Roots, 0);
 
   // Collect the values that we need to extract from the tree.
   for (TreeEntry &EIdx : VectorizableTree) {
     TreeEntry *Entry = &EIdx;
 
     // For each lane:
     for (int Lane = 0, LE = Entry->Scalars.size(); Lane != LE; ++Lane) {
       Value *Scalar = Entry->Scalars[Lane];
 
       // No need to handle users of gathered values.
       if (Entry->NeedToGather)
         continue;
 
+      // Check if the scalar is externally used as an extra arg.
+      auto ExtI = ExternallyUsedValues.find(Scalar);
+      if (ExtI != ExternallyUsedValues.end()) {
+        DEBUG(dbgs() << "SLP: Need to extract: Extra arg from lane " <<
+              Lane << " from " << *Scalar << ".\n");
+        ExternalUses.emplace_back(Scalar, nullptr, Lane);
+        continue;
+      }
       for (User *U : Scalar->users()) {
         DEBUG(dbgs() << "SLP: Checking user:" << *U << ".\n");
 
         Instruction *UserInst = dyn_cast<Instruction>(U);
         if (!UserInst)
           continue;
 
         // Skip in-tree scalars that become vectors
switch (Opcode) {
     }
     default:
     llvm_unreachable("unknown inst");
   }
   return nullptr;
 }
 
 Value *BoUpSLP::vectorizeTree() {
+  MapVector<Value *, DebugLoc> ExternallyUsedValues;
+  return vectorizeTree(ExternallyUsedValues);
+}
+
+Value *
+BoUpSLP::vectorizeTree(MapVector<Value *, DebugLoc> &ExternallyUsedValues) {
 
   // All blocks must be scheduled before any instructions are inserted.
   for (auto &BSIter : BlocksSchedules) {
     scheduleBlock(BSIter.second.get());
   }
 
   Builder.SetInsertPoint(&F->getEntryBlock().front());
   auto *VectorRoot = vectorizeTree(ArrayRef<Value *>(), &VectorizableTree[0]);
BoUpSLP::vectorizeTree(MapVector<Value *, DebugLoc> &ExternallyUsedValues) {
 
   // Extract all of the elements with the external uses.
   for (const auto &ExternalUse : ExternalUses) {
     Value *Scalar = ExternalUse.Scalar;
     llvm::User *User = ExternalUse.User;
 
     // Skip users that we already RAUW. This happens when one instruction
     // has multiple uses of the same value.
-    if (!is_contained(Scalar->users(), User))
+    if (User && !is_contained(Scalar->users(), User))
       continue;
     assert(ScalarToTreeEntry.count(Scalar) && "Invalid scalar");
 
     int Idx = ScalarToTreeEntry[Scalar];
     TreeEntry *E = &VectorizableTree[Idx];
     assert(!E->NeedToGather && "Extracting from a gather list");
 
     Value *Vec = E->VectorizedValue;
     assert(Vec && "Can't find vectorizable value");
 
     Value *Lane = Builder.getInt32(ExternalUse.Lane);
+    // If User == nullptr, the Scalar is used as extra arg. Generate
+    // ExtractElement instruction and update the record for this scalar in
+    // ExternallyUsedValues.
+    if (!User) {
+      assert(ExternallyUsedValues.count(Scalar) &&
+             "Scalar with nullptr as an external user must be registered in "
+             "ExternallyUsedValues map");
+      DebugLoc DL = ExternallyUsedValues[Scalar];
+      if (auto *VecI = dyn_cast<Instruction>(Vec)) {
+        Builder.SetInsertPoint(VecI->getParent(),
+                               std::next(VecI->getIterator()));
+      } else {
+        Builder.SetInsertPoint(&F->getEntryBlock().front());
+      }
+      Value *Ex = Builder.CreateExtractElement(Vec, Lane);
+      Ex = extend(ScalarRoot, Ex, Scalar->getType());
+      CSEBlocks.insert(cast<Instruction>(Scalar)->getParent());
+      ExternallyUsedValues.erase(Scalar);
+      ExternallyUsedValues[Ex] = DL;
+      continue;
+    }
+
     // Generate extracts for out-of-tree users.
     // Find the insertion point for the extractelement lane.
     if (auto *VecI = dyn_cast<Instruction>(Vec)) {
       if (PHINode *PH = dyn_cast<PHINode>(User)) {
         for (int i = 0, e = PH->getNumIncomingValues(); i != e; ++i) {
           if (PH->getIncomingValue(i) == Scalar) {
             TerminatorInst *IncomingTerminator =
                 PH->getIncomingBlock(i)->getTerminator();

 ///    \  /
 ///     +
 ///     |
 ///   *p =
 ///
 class HorizontalReduction {
   SmallVector<Value *, 16> ReductionOps;
   SmallVector<Value *, 32> ReducedVals;
+  // Use map vector to make stable output.
+  MapVector<Instruction *, Value *> ExtraArgs;
 
   BinaryOperator *ReductionRoot = nullptr;
   // After successfull horizontal reduction vectorization attempt for PHI node
   // vectorizer tries to update root binary op by combining vectorized tree and
   // the ReductionPHI node. But during vectorization this ReductionPHI can be
   // vectorized itself and replaced by the undef value, while the instruction
   // itself is marked for deletion. This 'marked for deletion' PHI node then can
   // be used in new binary operation, causing "Use still stuck around after Def
   // is destroyed" crash upon PHI node deletion.
   WeakVH ReductionPHI;
 
   /// The opcode of the reduction.
   Instruction::BinaryOps ReductionOpcode = Instruction::BinaryOpsEnd;
   /// The opcode of the values we perform a reduction on.
   unsigned ReducedValueOpcode = 0;
   /// Should we model this reduction as a pairwise reduction tree or a tree that
   /// splits the vector in halves and adds those halves.
   bool IsPairwiseReduction = false;
 
+  /// Checks if the ParentStackElem.first should be marked as a reduction
+  /// operation with an extra argument or as extra argument itself.
+  void markExtraArg(std::pair<Instruction *, unsigned> &ParentStackElem,
+                    Value *ExtraArg) {
+    if (ExtraArgs.count(ParentStackElem.first)) {
+      ExtraArgs[ParentStackElem.first] = nullptr;
+      // We ran into something like:
+      // ParentStackElem.first = ExtraArgs[ParentStackElem.first] + ExtraArg.
+      // The whole ParentStackElem.first should be considered as an extra value
+      // in this case.
+      // Do not perform analysis of remaining operands of ParentStackElem.first
+      // instruction, this whole instruction is an extra argument.
+      ParentStackElem.second = ParentStackElem.first->getNumOperands();
+    } else {
+      // We ran into something like:
+      // ParentStackElem.first += ... + ExtraArg + ...
+      ExtraArgs[ParentStackElem.first] = ExtraArg;
+    }
+  }
+
 public:
   HorizontalReduction() = default;
 
   /// \brief Try to find a reduction tree.
   bool matchAssociativeReduction(PHINode *Phi, BinaryOperator *B) {
     assert((!Phi || is_contained(Phi->operands(), B)) &&
            "Thi phi needs to use the binary operator");
 
while (!Stack.empty()) {
       Instruction *TreeN = Stack.back().first;
       unsigned EdgeToVist = Stack.back().second++;
       bool IsReducedValue = TreeN->getOpcode() != ReductionOpcode;
 
       // Postorder vist.
       if (EdgeToVist == 2 || IsReducedValue) {
         if (IsReducedValue)
           ReducedVals.push_back(TreeN);
-        else
+        else {
+          auto I = ExtraArgs.find(TreeN);
+          if (I != ExtraArgs.end() && !I->second) {
+            // Check if TreeN is an extra argument of its parent operation.
+            if (Stack.size() <= 1) {
+              // TreeN can't be an extra argument as it is a root reduction
+              // operation.
+              return false;
+            }
+            // Yes, TreeN is an extra argument, do not add it to a list of
+            // reduction operations.
+            // Stack[Stack.size() - 2] always points to the parent operation.
+            markExtraArg(Stack[Stack.size() - 2], TreeN);
+            ExtraArgs.erase(TreeN);
+          } else
             ReductionOps.push_back(TreeN);
+        }
         // Retract.
         Stack.pop_back();
         continue;
       }
 
       // Visit left or right.
       Value *NextV = TreeN->getOperand(EdgeToVist);
       if (NextV != Phi) {
         auto *I = dyn_cast<Instruction>(NextV);
         // Continue analysis if the next operand is a reduction operation or
         // (possibly) a reduced value. If the reduced value opcode is not set,
         // the first met operation != reduction operation is considered as the
         // reduced value class.
         if (I && (!ReducedValueOpcode || I->getOpcode() == ReducedValueOpcode ||
                   I->getOpcode() == ReductionOpcode)) {
           // Only handle trees in the current basic block.
-          if (I->getParent() != B->getParent())
-            return false;
+          if (I->getParent() != B->getParent()) {
+            // I is an extra argument for TreeN (its parent operation).
+            markExtraArg(Stack.back(), I);
+            continue;
+          }
 
           // Each tree node needs to have one user except for the ultimate
           // reduction.
-          if (!I->hasOneUse() && I != B)
-            return false;
+          if (!I->hasOneUse() && I != B) {
+            // I is an extra argument for TreeN (its parent operation).
+            markExtraArg(Stack.back(), I);
+            continue;
+          }
 
           if (I->getOpcode() == ReductionOpcode) {
             // We need to be able to reassociate the reduction operations.
-            if (!I->isAssociative())
-              return false;
+            if (!I->isAssociative()) {
+              // I is an extra argument for TreeN (its parent operation).
+              markExtraArg(Stack.back(), I);
+              continue;
+            }
           } else if (ReducedValueOpcode &&
                      ReducedValueOpcode != I->getOpcode()) {
             // Make sure that the opcodes of the operations that we are going to
             // reduce match.
-            return false;
+            // I is an extra argument for TreeN (its parent operation).
+            markExtraArg(Stack.back(), I);
+            continue;
           } else if (!ReducedValueOpcode)
             ReducedValueOpcode = I->getOpcode();
 
           Stack.push_back(std::make_pair(I, 0));
           continue;
         }
-        return false;
+        // NextV is an extra argument for TreeN (its parent operation).
+        markExtraArg(Stack.back(), NextV);
       }
     }
     return true;
   }
 
   /// \brief Attempt to vectorize the tree found by
   /// matchAssociativeReduction.
   bool tryToReduce(BoUpSLP &V, TargetTransformInfo *TTI) {
bool tryToReduce(BoUpSLP &V, TargetTransformInfo *TTI) {
 
     Value *VectorizedTree = nullptr;
     IRBuilder<> Builder(ReductionRoot);
     FastMathFlags Unsafe;
     Unsafe.setUnsafeAlgebra();
     Builder.setFastMathFlags(Unsafe);
     unsigned i = 0;
 
+    MapVector<Value *, DebugLoc> ExternallyUsedValues;
+    for (auto &Pair : ExtraArgs)
+      ExternallyUsedValues[Pair.second] = Pair.first->getDebugLoc();
     while (i < NumReducedVals - ReduxWidth + 1 && ReduxWidth > 2) {
       auto VL = makeArrayRef(&ReducedVals[i], ReduxWidth);
-      V.buildTree(VL, ReductionOps);
+      V.buildTree(VL, ExternallyUsedValues, ReductionOps);
       if (V.shouldReorder()) {
         SmallVector<Value *, 8> Reversed(VL.rbegin(), VL.rend());
-        V.buildTree(Reversed, ReductionOps);
+        V.buildTree(Reversed, ExternallyUsedValues, ReductionOps);
       }
       if (V.isTreeTinyAndNotFullyVectorizable())
         break;
 
       V.computeMinimumValueSizes();
 
       // Estimate cost.
       int Cost =
           V.getTreeCost() + getReductionCost(TTI, ReducedVals[i], ReduxWidth);
       if (Cost >= -SLPCostThreshold)
         break;
 
       DEBUG(dbgs() << "SLP: Vectorizing horizontal reduction at cost:" << Cost
                    << ". (HorRdx)\n");
 
       // Vectorize a tree.
       DebugLoc Loc = cast<Instruction>(ReducedVals[i])->getDebugLoc();
-      Value *VectorizedRoot = V.vectorizeTree();
+      Value *VectorizedRoot = V.vectorizeTree(ExternallyUsedValues);
 
       // Emit a reduction.
       Value *ReducedSubTree =
           emitReduction(VectorizedRoot, Builder, ReduxWidth);
       if (VectorizedTree) {
         Builder.SetCurrentDebugLocation(Loc);
         VectorizedTree = Builder.CreateBinOp(ReductionOpcode, VectorizedTree,
                                              ReducedSubTree, "bin.rdx");
       } else
         VectorizedTree = ReducedSubTree;
       i += ReduxWidth;
       ReduxWidth = PowerOf2Floor(NumReducedVals - i);
     }
 
     if (VectorizedTree) {
       // Finish the reduction.
       for (; i < NumReducedVals; ++i) {
-        Builder.SetCurrentDebugLocation(
-          cast<Instruction>(ReducedVals[i])->getDebugLoc());
+        auto *I = cast<Instruction>(ReducedVals[i]);
+        Builder.SetCurrentDebugLocation(I->getDebugLoc());
+        VectorizedTree =
+            Builder.CreateBinOp(ReductionOpcode, VectorizedTree, I);
+      }
+      for (auto &Pair : ExternallyUsedValues) {
+        Builder.SetCurrentDebugLocation(Pair.second);
         VectorizedTree = Builder.CreateBinOp(ReductionOpcode, VectorizedTree,
-                                             ReducedVals[i]);
+                                             Pair.first, "bin.extra");
       }
       // Update users.
       if (ReductionPHI && !isa<UndefValue>(ReductionPHI)) {
         assert(ReductionRoot && "Need a reduction operation");
         ReductionRoot->setOperand(0, VectorizedTree);
         ReductionRoot->setOperand(1, ReductionPHI);
       } else
         ReductionRoot->replaceAllUsesWith(VectorizedTree);

test/Transforms/SLPVectorizer/X86/horizontal-list.ll

 }
 
 define float @bazz() {
 ; CHECK-LABEL: @bazz(
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* @n, align 4
 ; CHECK-NEXT:    [[MUL:%.*]] = mul nsw i32 [[TMP0]], 3
 ; CHECK-NEXT:    [[CONV:%.*]] = sitofp i32 [[MUL]] to float
-; CHECK-NEXT:    [[TMP1:%.*]] = load <2 x float>, <2 x float>* bitcast ([20 x float]* @arr to <2 x float>*), align 16
-; CHECK-NEXT:    [[TMP2:%.*]] = load <2 x float>, <2 x float>* bitcast ([20 x float]* @arr1 to <2 x float>*), align 16
-; CHECK-NEXT:    [[TMP3:%.*]] = fmul fast <2 x float> [[TMP2]], [[TMP1]]
-; CHECK-NEXT:    [[TMP4:%.*]] = extractelement <2 x float> [[TMP3]], i32 0
-; CHECK-NEXT:    [[ADD:%.*]] = fadd fast float [[TMP4]], [[CONV]]
-; CHECK-NEXT:    [[TMP5:%.*]] = extractelement <2 x float> [[TMP3]], i32 1
-; CHECK-NEXT:    [[ADD_1:%.*]] = fadd fast float [[TMP5]], [[ADD]]
-; CHECK-NEXT:    [[TMP6:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr, i64 0, i64 2) to <2 x float>*), align 8
-; CHECK-NEXT:    [[TMP7:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr1, i64 0, i64 2) to <2 x float>*), align 8
-; CHECK-NEXT:    [[TMP8:%.*]] = fmul fast <2 x float> [[TMP7]], [[TMP6]]
-; CHECK-NEXT:    [[TMP9:%.*]] = extractelement <2 x float> [[TMP8]], i32 0
-; CHECK-NEXT:    [[ADD_2:%.*]] = fadd fast float [[TMP9]], [[ADD_1]]
-; CHECK-NEXT:    [[TMP10:%.*]] = extractelement <2 x float> [[TMP8]], i32 1
-; CHECK-NEXT:    [[ADD_3:%.*]] = fadd fast float [[TMP10]], [[ADD_2]]
+; CHECK-NEXT:    [[TMP1:%.*]] = load <8 x float>, <8 x float>* bitcast ([20 x float]* @arr to <8 x float>*), align 16
+; CHECK-NEXT:    [[TMP2:%.*]] = load <8 x float>, <8 x float>* bitcast ([20 x float]* @arr1 to <8 x float>*), align 16
+; CHECK-NEXT:    [[TMP3:%.*]] = fmul fast <8 x float> [[TMP2]], [[TMP1]]
+; CHECK-NEXT:    [[ADD:%.*]] = fadd fast float undef, [[CONV]]
+; CHECK-NEXT:    [[ADD_1:%.*]] = fadd fast float undef, [[ADD]]
+; CHECK-NEXT:    [[ADD_2:%.*]] = fadd fast float undef, [[ADD_1]]
+; CHECK-NEXT:    [[ADD_3:%.*]] = fadd fast float undef, [[ADD_2]]
 ; CHECK-NEXT:    [[MUL5:%.*]] = shl nsw i32 [[TMP0]], 2
 ; CHECK-NEXT:    [[CONV6:%.*]] = sitofp i32 [[MUL5]] to float
 ; CHECK-NEXT:    [[ADD7:%.*]] = fadd fast float [[ADD_3]], [[CONV6]]
-; CHECK-NEXT:    [[TMP11:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr, i64 0, i64 4) to <2 x float>*), align 16
-; CHECK-NEXT:    [[TMP12:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr1, i64 0, i64 4) to <2 x float>*), align 16
-; CHECK-NEXT:    [[TMP13:%.*]] = fmul fast <2 x float> [[TMP12]], [[TMP11]]
-; CHECK-NEXT:    [[TMP14:%.*]] = extractelement <2 x float> [[TMP13]], i32 0
-; CHECK-NEXT:    [[ADD19:%.*]] = fadd fast float [[TMP14]], [[ADD7]]
-; CHECK-NEXT:    [[TMP15:%.*]] = extractelement <2 x float> [[TMP13]], i32 1
-; CHECK-NEXT:    [[ADD19_1:%.*]] = fadd fast float [[TMP15]], [[ADD19]]
-; CHECK-NEXT:    [[TMP16:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr, i64 0, i64 6) to <2 x float>*), align 8
-; CHECK-NEXT:    [[TMP17:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr1, i64 0, i64 6) to <2 x float>*), align 8
-; CHECK-NEXT:    [[TMP18:%.*]] = fmul fast <2 x float> [[TMP17]], [[TMP16]]
-; CHECK-NEXT:    [[TMP19:%.*]] = extractelement <2 x float> [[TMP18]], i32 0
-; CHECK-NEXT:    [[ADD19_2:%.*]] = fadd fast float [[TMP19]], [[ADD19_1]]
-; CHECK-NEXT:    [[TMP20:%.*]] = extractelement <2 x float> [[TMP18]], i32 1
-; CHECK-NEXT:    [[ADD19_3:%.*]] = fadd fast float [[TMP20]], [[ADD19_2]]
-; CHECK-NEXT:    store float [[ADD19_3]], float* @res, align 4
-; CHECK-NEXT:    ret float [[ADD19_3]]
+; CHECK-NEXT:    [[ADD19:%.*]] = fadd fast float undef, [[ADD7]]
+; CHECK-NEXT:    [[ADD19_1:%.*]] = fadd fast float undef, [[ADD19]]
+; CHECK-NEXT:    [[ADD19_2:%.*]] = fadd fast float undef, [[ADD19_1]]
+; CHECK-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <8 x float> [[TMP3]], <8 x float> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX:%.*]] = fadd fast <8 x float> [[TMP3]], [[RDX_SHUF]]
+; CHECK-NEXT:    [[RDX_SHUF1:%.*]] = shufflevector <8 x float> [[BIN_RDX]], <8 x float> undef, <8 x i32> <i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX2:%.*]] = fadd fast <8 x float> [[BIN_RDX]], [[RDX_SHUF1]]
+; CHECK-NEXT:    [[RDX_SHUF3:%.*]] = shufflevector <8 x float> [[BIN_RDX2]], <8 x float> undef, <8 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX4:%.*]] = fadd fast <8 x float> [[BIN_RDX2]], [[RDX_SHUF3]]
+; CHECK-NEXT:    [[TMP4:%.*]] = extractelement <8 x float> [[BIN_RDX4]], i32 0
+; CHECK-NEXT:    [[BIN_EXTRA:%.*]] = fadd fast float [[TMP4]], [[CONV]]
+; CHECK-NEXT:    [[BIN_EXTRA5:%.*]] = fadd fast float [[BIN_EXTRA]], [[CONV6]]
+; CHECK-NEXT:    [[ADD19_3:%.*]] = fadd fast float undef, [[ADD19_2]]
+; CHECK-NEXT:    store float [[BIN_EXTRA5]], float* @res, align 4
+; CHECK-NEXT:    ret float [[BIN_EXTRA5]]
 ;
 ; THRESHOLD-LABEL: @bazz(
 ; THRESHOLD-NEXT:  entry:
 ; THRESHOLD-NEXT:    [[TMP0:%.*]] = load i32, i32* @n, align 4
 ; THRESHOLD-NEXT:    [[MUL:%.*]] = mul nsw i32 [[TMP0]], 3
 ; THRESHOLD-NEXT:    [[CONV:%.*]] = sitofp i32 [[MUL]] to float
-; THRESHOLD-NEXT:    [[TMP1:%.*]] = load <2 x float>, <2 x float>* bitcast ([20 x float]* @arr to <2 x float>*), align 16
-; THRESHOLD-NEXT:    [[TMP2:%.*]] = load <2 x float>, <2 x float>* bitcast ([20 x float]* @arr1 to <2 x float>*), align 16
-; THRESHOLD-NEXT:    [[TMP3:%.*]] = fmul fast <2 x float> [[TMP2]], [[TMP1]]
-; THRESHOLD-NEXT:    [[TMP4:%.*]] = extractelement <2 x float> [[TMP3]], i32 0
-; THRESHOLD-NEXT:    [[ADD:%.*]] = fadd fast float [[TMP4]], [[CONV]]
-; THRESHOLD-NEXT:    [[TMP5:%.*]] = extractelement <2 x float> [[TMP3]], i32 1
-; THRESHOLD-NEXT:    [[ADD_1:%.*]] = fadd fast float [[TMP5]], [[ADD]]
-; THRESHOLD-NEXT:    [[TMP6:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr, i64 0, i64 2) to <2 x float>*), align 8
-; THRESHOLD-NEXT:    [[TMP7:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr1, i64 0, i64 2) to <2 x float>*), align 8
-; THRESHOLD-NEXT:    [[TMP8:%.*]] = fmul fast <2 x float> [[TMP7]], [[TMP6]]
-; THRESHOLD-NEXT:    [[TMP9:%.*]] = extractelement <2 x float> [[TMP8]], i32 0
-; THRESHOLD-NEXT:    [[ADD_2:%.*]] = fadd fast float [[TMP9]], [[ADD_1]]
-; THRESHOLD-NEXT:    [[TMP10:%.*]] = extractelement <2 x float> [[TMP8]], i32 1
-; THRESHOLD-NEXT:    [[ADD_3:%.*]] = fadd fast float [[TMP10]], [[ADD_2]]
+; THRESHOLD-NEXT:    [[TMP1:%.*]] = load <8 x float>, <8 x float>* bitcast ([20 x float]* @arr to <8 x float>*), align 16
+; THRESHOLD-NEXT:    [[TMP2:%.*]] = load <8 x float>, <8 x float>* bitcast ([20 x float]* @arr1 to <8 x float>*), align 16
+; THRESHOLD-NEXT:    [[TMP3:%.*]] = fmul fast <8 x float> [[TMP2]], [[TMP1]]
+; THRESHOLD-NEXT:    [[ADD:%.*]] = fadd fast float undef, [[CONV]]
+; THRESHOLD-NEXT:    [[ADD_1:%.*]] = fadd fast float undef, [[ADD]]
+; THRESHOLD-NEXT:    [[ADD_2:%.*]] = fadd fast float undef, [[ADD_1]]
+; THRESHOLD-NEXT:    [[ADD_3:%.*]] = fadd fast float undef, [[ADD_2]]
 ; THRESHOLD-NEXT:    [[MUL5:%.*]] = shl nsw i32 [[TMP0]], 2
 ; THRESHOLD-NEXT:    [[CONV6:%.*]] = sitofp i32 [[MUL5]] to float
 ; THRESHOLD-NEXT:    [[ADD7:%.*]] = fadd fast float [[ADD_3]], [[CONV6]]
-; THRESHOLD-NEXT:    [[TMP11:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr, i64 0, i64 4) to <2 x float>*), align 16
-; THRESHOLD-NEXT:    [[TMP12:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr1, i64 0, i64 4) to <2 x float>*), align 16
-; THRESHOLD-NEXT:    [[TMP13:%.*]] = fmul fast <2 x float> [[TMP12]], [[TMP11]]
-; THRESHOLD-NEXT:    [[TMP14:%.*]] = extractelement <2 x float> [[TMP13]], i32 0
-; THRESHOLD-NEXT:    [[ADD19:%.*]] = fadd fast float [[TMP14]], [[ADD7]]
-; THRESHOLD-NEXT:    [[TMP15:%.*]] = extractelement <2 x float> [[TMP13]], i32 1
-; THRESHOLD-NEXT:    [[ADD19_1:%.*]] = fadd fast float [[TMP15]], [[ADD19]]
-; THRESHOLD-NEXT:    [[TMP16:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr, i64 0, i64 6) to <2 x float>*), align 8
-; THRESHOLD-NEXT:    [[TMP17:%.*]] = load <2 x float>, <2 x float>* bitcast (float* getelementptr inbounds ([20 x float], [20 x float]* @arr1, i64 0, i64 6) to <2 x float>*), align 8
-; THRESHOLD-NEXT:    [[TMP18:%.*]] = fmul fast <2 x float> [[TMP17]], [[TMP16]]
-; THRESHOLD-NEXT:    [[TMP19:%.*]] = extractelement <2 x float> [[TMP18]], i32 0
-; THRESHOLD-NEXT:    [[ADD19_2:%.*]] = fadd fast float [[TMP19]], [[ADD19_1]]
-; THRESHOLD-NEXT:    [[TMP20:%.*]] = extractelement <2 x float> [[TMP18]], i32 1
-; THRESHOLD-NEXT:    [[ADD19_3:%.*]] = fadd fast float [[TMP20]], [[ADD19_2]]
-; THRESHOLD-NEXT:    store float [[ADD19_3]], float* @res, align 4
-; THRESHOLD-NEXT:    ret float [[ADD19_3]]
+; THRESHOLD-NEXT:    [[ADD19:%.*]] = fadd fast float undef, [[ADD7]]
+; THRESHOLD-NEXT:    [[ADD19_1:%.*]] = fadd fast float undef, [[ADD19]]
+; THRESHOLD-NEXT:    [[ADD19_2:%.*]] = fadd fast float undef, [[ADD19_1]]
+; THRESHOLD-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <8 x float> [[TMP3]], <8 x float> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX:%.*]] = fadd fast <8 x float> [[TMP3]], [[RDX_SHUF]]
+; THRESHOLD-NEXT:    [[RDX_SHUF1:%.*]] = shufflevector <8 x float> [[BIN_RDX]], <8 x float> undef, <8 x i32> <i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX2:%.*]] = fadd fast <8 x float> [[BIN_RDX]], [[RDX_SHUF1]]
+; THRESHOLD-NEXT:    [[RDX_SHUF3:%.*]] = shufflevector <8 x float> [[BIN_RDX2]], <8 x float> undef, <8 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX4:%.*]] = fadd fast <8 x float> [[BIN_RDX2]], [[RDX_SHUF3]]
+; THRESHOLD-NEXT:    [[TMP4:%.*]] = extractelement <8 x float> [[BIN_RDX4]], i32 0
+; THRESHOLD-NEXT:    [[BIN_EXTRA:%.*]] = fadd fast float [[TMP4]], [[CONV]]
+; THRESHOLD-NEXT:    [[BIN_EXTRA5:%.*]] = fadd fast float [[BIN_EXTRA]], [[CONV6]]
+; THRESHOLD-NEXT:    [[ADD19_3:%.*]] = fadd fast float undef, [[ADD19_2]]
+; THRESHOLD-NEXT:    store float [[BIN_EXTRA5]], float* @res, align 4
+; THRESHOLD-NEXT:    ret float [[BIN_EXTRA5]]
 ;
 entry:
   %0 = load i32, i32* @n, align 4
   %mul = mul nsw i32 %0, 3
   %conv = sitofp i32 %mul to float
   %1 = load float, float* getelementptr inbounds ([20 x float], [20 x float]* @arr, i64 0, i64 0), align 16
   %2 = load float, float* getelementptr inbounds ([20 x float], [20 x float]* @arr1, i64 0, i64 0), align 16
   %mul4 = fmul fast float %2, %1
;
   ret float %add.47
 }
 
 define float @f1(float* nocapture readonly %x, i32 %a, i32 %b) {
 ; CHECK-LABEL: @f1(
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[REM:%.*]] = srem i32 [[A:%.*]], [[B:%.*]]
 ; CHECK-NEXT:    [[CONV:%.*]] = sitofp i32 [[REM]] to float
-; CHECK-NEXT:    [[TMP0:%.*]] = load float, float* [[X:%.*]], align 4
-; CHECK-NEXT:    [[ADD:%.*]] = fadd fast float [[TMP0]], [[CONV]]
-; CHECK-NEXT:    [[ARRAYIDX_1:%.*]] = getelementptr inbounds float, float* [[X]], i64 1
-; CHECK-NEXT:    [[TMP1:%.*]] = load float, float* [[ARRAYIDX_1]], align 4
-; CHECK-NEXT:    [[ADD_1:%.*]] = fadd fast float [[TMP1]], [[ADD]]
+; CHECK-NEXT:    [[ARRAYIDX_1:%.*]] = getelementptr inbounds float, float* [[X:%.*]], i64 1
 ; CHECK-NEXT:    [[ARRAYIDX_2:%.*]] = getelementptr inbounds float, float* [[X]], i64 2
-; CHECK-NEXT:    [[TMP2:%.*]] = load float, float* [[ARRAYIDX_2]], align 4
-; CHECK-NEXT:    [[ADD_2:%.*]] = fadd fast float [[TMP2]], [[ADD_1]]
 ; CHECK-NEXT:    [[ARRAYIDX_3:%.*]] = getelementptr inbounds float, float* [[X]], i64 3
-; CHECK-NEXT:    [[TMP3:%.*]] = load float, float* [[ARRAYIDX_3]], align 4
-; CHECK-NEXT:    [[ADD_3:%.*]] = fadd fast float [[TMP3]], [[ADD_2]]
 ; CHECK-NEXT:    [[ARRAYIDX_4:%.*]] = getelementptr inbounds float, float* [[X]], i64 4
-; CHECK-NEXT:    [[TMP4:%.*]] = load float, float* [[ARRAYIDX_4]], align 4
-; CHECK-NEXT:    [[ADD_4:%.*]] = fadd fast float [[TMP4]], [[ADD_3]]
 ; CHECK-NEXT:    [[ARRAYIDX_5:%.*]] = getelementptr inbounds float, float* [[X]], i64 5
-; CHECK-NEXT:    [[TMP5:%.*]] = load float, float* [[ARRAYIDX_5]], align 4
-; CHECK-NEXT:    [[ADD_5:%.*]] = fadd fast float [[TMP5]], [[ADD_4]]
 ; CHECK-NEXT:    [[ARRAYIDX_6:%.*]] = getelementptr inbounds float, float* [[X]], i64 6
-; CHECK-NEXT:    [[TMP6:%.*]] = load float, float* [[ARRAYIDX_6]], align 4
-; CHECK-NEXT:    [[ADD_6:%.*]] = fadd fast float [[TMP6]], [[ADD_5]]
 ; CHECK-NEXT:    [[ARRAYIDX_7:%.*]] = getelementptr inbounds float, float* [[X]], i64 7
-; CHECK-NEXT:    [[TMP7:%.*]] = load float, float* [[ARRAYIDX_7]], align 4
-; CHECK-NEXT:    [[ADD_7:%.*]] = fadd fast float [[TMP7]], [[ADD_6]]
 ; CHECK-NEXT:    [[ARRAYIDX_8:%.*]] = getelementptr inbounds float, float* [[X]], i64 8
-; CHECK-NEXT:    [[TMP8:%.*]] = load float, float* [[ARRAYIDX_8]], align 4
-; CHECK-NEXT:    [[ADD_8:%.*]] = fadd fast float [[TMP8]], [[ADD_7]]
 ; CHECK-NEXT:    [[ARRAYIDX_9:%.*]] = getelementptr inbounds float, float* [[X]], i64 9
-; CHECK-NEXT:    [[TMP9:%.*]] = load float, float* [[ARRAYIDX_9]], align 4
-; CHECK-NEXT:    [[ADD_9:%.*]] = fadd fast float [[TMP9]], [[ADD_8]]
 ; CHECK-NEXT:    [[ARRAYIDX_10:%.*]] = getelementptr inbounds float, float* [[X]], i64 10
-; CHECK-NEXT:    [[TMP10:%.*]] = load float, float* [[ARRAYIDX_10]], align 4
-; CHECK-NEXT:    [[ADD_10:%.*]] = fadd fast float [[TMP10]], [[ADD_9]]
 ; CHECK-NEXT:    [[ARRAYIDX_11:%.*]] = getelementptr inbounds float, float* [[X]], i64 11
-; CHECK-NEXT:    [[TMP11:%.*]] = load float, float* [[ARRAYIDX_11]], align 4
-; CHECK-NEXT:    [[ADD_11:%.*]] = fadd fast float [[TMP11]], [[ADD_10]]
 ; CHECK-NEXT:    [[ARRAYIDX_12:%.*]] = getelementptr inbounds float, float* [[X]], i64 12
-; CHECK-NEXT:    [[TMP12:%.*]] = load float, float* [[ARRAYIDX_12]], align 4
-; CHECK-NEXT:    [[ADD_12:%.*]] = fadd fast float [[TMP12]], [[ADD_11]]
 ; CHECK-NEXT:    [[ARRAYIDX_13:%.*]] = getelementptr inbounds float, float* [[X]], i64 13
-; CHECK-NEXT:    [[TMP13:%.*]] = load float, float* [[ARRAYIDX_13]], align 4
-; CHECK-NEXT:    [[ADD_13:%.*]] = fadd fast float [[TMP13]], [[ADD_12]]
 ; CHECK-NEXT:    [[ARRAYIDX_14:%.*]] = getelementptr inbounds float, float* [[X]], i64 14
-; CHECK-NEXT:    [[TMP14:%.*]] = load float, float* [[ARRAYIDX_14]], align 4
-; CHECK-NEXT:    [[ADD_14:%.*]] = fadd fast float [[TMP14]], [[ADD_13]]
 ; CHECK-NEXT:    [[ARRAYIDX_15:%.*]] = getelementptr inbounds float, float* [[X]], i64 15
-; CHECK-NEXT:    [[TMP15:%.*]] = load float, float* [[ARRAYIDX_15]], align 4
-; CHECK-NEXT:    [[ADD_15:%.*]] = fadd fast float [[TMP15]], [[ADD_14]]
 ; CHECK-NEXT:    [[ARRAYIDX_16:%.*]] = getelementptr inbounds float, float* [[X]], i64 16
-; CHECK-NEXT:    [[TMP16:%.*]] = load float, float* [[ARRAYIDX_16]], align 4
-; CHECK-NEXT:    [[ADD_16:%.*]] = fadd fast float [[TMP16]], [[ADD_15]]
 ; CHECK-NEXT:    [[ARRAYIDX_17:%.*]] = getelementptr inbounds float, float* [[X]], i64 17
-; CHECK-NEXT:    [[TMP17:%.*]] = load float, float* [[ARRAYIDX_17]], align 4
-; CHECK-NEXT:    [[ADD_17:%.*]] = fadd fast float [[TMP17]], [[ADD_16]]
 ; CHECK-NEXT:    [[ARRAYIDX_18:%.*]] = getelementptr inbounds float, float* [[X]], i64 18
-; CHECK-NEXT:    [[TMP18:%.*]] = load float, float* [[ARRAYIDX_18]], align 4
-; CHECK-NEXT:    [[ADD_18:%.*]] = fadd fast float [[TMP18]], [[ADD_17]]
 ; CHECK-NEXT:    [[ARRAYIDX_19:%.*]] = getelementptr inbounds float, float* [[X]], i64 19
-; CHECK-NEXT:    [[TMP19:%.*]] = load float, float* [[ARRAYIDX_19]], align 4
-; CHECK-NEXT:    [[ADD_19:%.*]] = fadd fast float [[TMP19]], [[ADD_18]]
 ; CHECK-NEXT:    [[ARRAYIDX_20:%.*]] = getelementptr inbounds float, float* [[X]], i64 20
-; CHECK-NEXT:    [[TMP20:%.*]] = load float, float* [[ARRAYIDX_20]], align 4
-; CHECK-NEXT:    [[ADD_20:%.*]] = fadd fast float [[TMP20]], [[ADD_19]]
 ; CHECK-NEXT:    [[ARRAYIDX_21:%.*]] = getelementptr inbounds float, float* [[X]], i64 21
-; CHECK-NEXT:    [[TMP21:%.*]] = load float, float* [[ARRAYIDX_21]], align 4
-; CHECK-NEXT:    [[ADD_21:%.*]] = fadd fast float [[TMP21]], [[ADD_20]]
 ; CHECK-NEXT:    [[ARRAYIDX_22:%.*]] = getelementptr inbounds float, float* [[X]], i64 22
-; CHECK-NEXT:    [[TMP22:%.*]] = load float, float* [[ARRAYIDX_22]], align 4
-; CHECK-NEXT:    [[ADD_22:%.*]] = fadd fast float [[TMP22]], [[ADD_21]]
 ; CHECK-NEXT:    [[ARRAYIDX_23:%.*]] = getelementptr inbounds float, float* [[X]], i64 23
-; CHECK-NEXT:    [[TMP23:%.*]] = load float, float* [[ARRAYIDX_23]], align 4
-; CHECK-NEXT:    [[ADD_23:%.*]] = fadd fast float [[TMP23]], [[ADD_22]]
 ; CHECK-NEXT:    [[ARRAYIDX_24:%.*]] = getelementptr inbounds float, float* [[X]], i64 24
-; CHECK-NEXT:    [[TMP24:%.*]] = load float, float* [[ARRAYIDX_24]], align 4
-; CHECK-NEXT:    [[ADD_24:%.*]] = fadd fast float [[TMP24]], [[ADD_23]]
 ; CHECK-NEXT:    [[ARRAYIDX_25:%.*]] = getelementptr inbounds float, float* [[X]], i64 25
-; CHECK-NEXT:    [[TMP25:%.*]] = load float, float* [[ARRAYIDX_25]], align 4
-; CHECK-NEXT:    [[ADD_25:%.*]] = fadd fast float [[TMP25]], [[ADD_24]]
 ; CHECK-NEXT:    [[ARRAYIDX_26:%.*]] = getelementptr inbounds float, float* [[X]], i64 26
-; CHECK-NEXT:    [[TMP26:%.*]] = load float, float* [[ARRAYIDX_26]], align 4
-; CHECK-NEXT:    [[ADD_26:%.*]] = fadd fast float [[TMP26]], [[ADD_25]]
 ; CHECK-NEXT:    [[ARRAYIDX_27:%.*]] = getelementptr inbounds float, float* [[X]], i64 27
-; CHECK-NEXT:    [[TMP27:%.*]] = load float, float* [[ARRAYIDX_27]], align 4
-; CHECK-NEXT:    [[ADD_27:%.*]] = fadd fast float [[TMP27]], [[ADD_26]]
 ; CHECK-NEXT:    [[ARRAYIDX_28:%.*]] = getelementptr inbounds float, float* [[X]], i64 28
-; CHECK-NEXT:    [[TMP28:%.*]] = load float, float* [[ARRAYIDX_28]], align 4
-; CHECK-NEXT:    [[ADD_28:%.*]] = fadd fast float [[TMP28]], [[ADD_27]]
 ; CHECK-NEXT:    [[ARRAYIDX_29:%.*]] = getelementptr inbounds float, float* [[X]], i64 29
-; CHECK-NEXT:    [[TMP29:%.*]] = load float, float* [[ARRAYIDX_29]], align 4
-; CHECK-NEXT:    [[ADD_29:%.*]] = fadd fast float [[TMP29]], [[ADD_28]]
 ; CHECK-NEXT:    [[ARRAYIDX_30:%.*]] = getelementptr inbounds float, float* [[X]], i64 30
-; CHECK-NEXT:    [[TMP30:%.*]] = load float, float* [[ARRAYIDX_30]], align 4
-; CHECK-NEXT:    [[ADD_30:%.*]] = fadd fast float [[TMP30]], [[ADD_29]]
 ; CHECK-NEXT:    [[ARRAYIDX_31:%.*]] = getelementptr inbounds float, float* [[X]], i64 31
-; CHECK-NEXT:    [[TMP31:%.*]] = load float, float* [[ARRAYIDX_31]], align 4
-; CHECK-NEXT:    [[ADD_31:%.*]] = fadd fast float [[TMP31]], [[ADD_30]]
-; CHECK-NEXT:    ret float [[ADD_31]]
+; CHECK-NEXT:    [[TMP0:%.*]] = bitcast float* [[X]] to <32 x float>*
+; CHECK-NEXT:    [[TMP1:%.*]] = load <32 x float>, <32 x float>* [[TMP0]], align 4
+; CHECK-NEXT:    [[ADD:%.*]] = fadd fast float undef, [[CONV]]
+; CHECK-NEXT:    [[ADD_1:%.*]] = fadd fast float undef, [[ADD]]
+; CHECK-NEXT:    [[ADD_2:%.*]] = fadd fast float undef, [[ADD_1]]
+; CHECK-NEXT:    [[ADD_3:%.*]] = fadd fast float undef, [[ADD_2]]
+; CHECK-NEXT:    [[ADD_4:%.*]] = fadd fast float undef, [[ADD_3]]
+; CHECK-NEXT:    [[ADD_5:%.*]] = fadd fast float undef, [[ADD_4]]
+; CHECK-NEXT:    [[ADD_6:%.*]] = fadd fast float undef, [[ADD_5]]
+; CHECK-NEXT:    [[ADD_7:%.*]] = fadd fast float undef, [[ADD_6]]
+; CHECK-NEXT:    [[ADD_8:%.*]] = fadd fast float undef, [[ADD_7]]
+; CHECK-NEXT:    [[ADD_9:%.*]] = fadd fast float undef, [[ADD_8]]
+; CHECK-NEXT:    [[ADD_10:%.*]] = fadd fast float undef, [[ADD_9]]
+; CHECK-NEXT:    [[ADD_11:%.*]] = fadd fast float undef, [[ADD_10]]
+; CHECK-NEXT:    [[ADD_12:%.*]] = fadd fast float undef, [[ADD_11]]
+; CHECK-NEXT:    [[ADD_13:%.*]] = fadd fast float undef, [[ADD_12]]
+; CHECK-NEXT:    [[ADD_14:%.*]] = fadd fast float undef, [[ADD_13]]
+; CHECK-NEXT:    [[ADD_15:%.*]] = fadd fast float undef, [[ADD_14]]
+; CHECK-NEXT:    [[ADD_16:%.*]] = fadd fast float undef, [[ADD_15]]
+; CHECK-NEXT:    [[ADD_17:%.*]] = fadd fast float undef, [[ADD_16]]
+; CHECK-NEXT:    [[ADD_18:%.*]] = fadd fast float undef, [[ADD_17]]
+; CHECK-NEXT:    [[ADD_19:%.*]] = fadd fast float undef, [[ADD_18]]
+; CHECK-NEXT:    [[ADD_20:%.*]] = fadd fast float undef, [[ADD_19]]
+; CHECK-NEXT:    [[ADD_21:%.*]] = fadd fast float undef, [[ADD_20]]
+; CHECK-NEXT:    [[ADD_22:%.*]] = fadd fast float undef, [[ADD_21]]
+; CHECK-NEXT:    [[ADD_23:%.*]] = fadd fast float undef, [[ADD_22]]
+; CHECK-NEXT:    [[ADD_24:%.*]] = fadd fast float undef, [[ADD_23]]
+; CHECK-NEXT:    [[ADD_25:%.*]] = fadd fast float undef, [[ADD_24]]
+; CHECK-NEXT:    [[ADD_26:%.*]] = fadd fast float undef, [[ADD_25]]
+; CHECK-NEXT:    [[ADD_27:%.*]] = fadd fast float undef, [[ADD_26]]
+; CHECK-NEXT:    [[ADD_28:%.*]] = fadd fast float undef, [[ADD_27]]
+; CHECK-NEXT:    [[ADD_29:%.*]] = fadd fast float undef, [[ADD_28]]
+; CHECK-NEXT:    [[ADD_30:%.*]] = fadd fast float undef, [[ADD_29]]
+; CHECK-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <32 x float> [[TMP1]], <32 x float> undef, <32 x i32> <i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX:%.*]] = fadd fast <32 x float> [[TMP1]], [[RDX_SHUF]]
+; CHECK-NEXT:    [[RDX_SHUF1:%.*]] = shufflevector <32 x float> [[BIN_RDX]], <32 x float> undef, <32 x i32> <i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX2:%.*]] = fadd fast <32 x float> [[BIN_RDX]], [[RDX_SHUF1]]
+; CHECK-NEXT:    [[RDX_SHUF3:%.*]] = shufflevector <32 x float> [[BIN_RDX2]], <32 x float> undef, <32 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX4:%.*]] = fadd fast <32 x float> [[BIN_RDX2]], [[RDX_SHUF3]]
+; CHECK-NEXT:    [[RDX_SHUF5:%.*]] = shufflevector <32 x float> [[BIN_RDX4]], <32 x float> undef, <32 x i32> <i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX6:%.*]] = fadd fast <32 x float> [[BIN_RDX4]], [[RDX_SHUF5]]
+; CHECK-NEXT:    [[RDX_SHUF7:%.*]] = shufflevector <32 x float> [[BIN_RDX6]], <32 x float> undef, <32 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX8:%.*]] = fadd fast <32 x float> [[BIN_RDX6]], [[RDX_SHUF7]]
+; CHECK-NEXT:    [[TMP2:%.*]] = extractelement <32 x float> [[BIN_RDX8]], i32 0
+; CHECK-NEXT:    [[BIN_EXTRA:%.*]] = fadd fast float [[TMP2]], [[CONV]]
+; CHECK-NEXT:    [[ADD_31:%.*]] = fadd fast float undef, [[ADD_30]]
+; CHECK-NEXT:    ret float [[BIN_EXTRA]]
 ;
 ; THRESHOLD-LABEL: @f1(
 ; THRESHOLD-NEXT:  entry:
 ; THRESHOLD-NEXT:    [[REM:%.*]] = srem i32 [[A:%.*]], [[B:%.*]]
 ; THRESHOLD-NEXT:    [[CONV:%.*]] = sitofp i32 [[REM]] to float
-; THRESHOLD-NEXT:    [[TMP0:%.*]] = load float, float* [[X:%.*]], align 4
-; THRESHOLD-NEXT:    [[ADD:%.*]] = fadd fast float [[TMP0]], [[CONV]]
-; THRESHOLD-NEXT:    [[ARRAYIDX_1:%.*]] = getelementptr inbounds float, float* [[X]], i64 1
-; THRESHOLD-NEXT:    [[TMP1:%.*]] = load float, float* [[ARRAYIDX_1]], align 4
-; THRESHOLD-NEXT:    [[ADD_1:%.*]] = fadd fast float [[TMP1]], [[ADD]]
+; THRESHOLD-NEXT:    [[ARRAYIDX_1:%.*]] = getelementptr inbounds float, float* [[X:%.*]], i64 1
 ; THRESHOLD-NEXT:    [[ARRAYIDX_2:%.*]] = getelementptr inbounds float, float* [[X]], i64 2
-; THRESHOLD-NEXT:    [[TMP2:%.*]] = load float, float* [[ARRAYIDX_2]], align 4
-; THRESHOLD-NEXT:    [[ADD_2:%.*]] = fadd fast float [[TMP2]], [[ADD_1]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_3:%.*]] = getelementptr inbounds float, float* [[X]], i64 3
-; THRESHOLD-NEXT:    [[TMP3:%.*]] = load float, float* [[ARRAYIDX_3]], align 4
-; THRESHOLD-NEXT:    [[ADD_3:%.*]] = fadd fast float [[TMP3]], [[ADD_2]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_4:%.*]] = getelementptr inbounds float, float* [[X]], i64 4
-; THRESHOLD-NEXT:    [[TMP4:%.*]] = load float, float* [[ARRAYIDX_4]], align 4
-; THRESHOLD-NEXT:    [[ADD_4:%.*]] = fadd fast float [[TMP4]], [[ADD_3]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_5:%.*]] = getelementptr inbounds float, float* [[X]], i64 5
-; THRESHOLD-NEXT:    [[TMP5:%.*]] = load float, float* [[ARRAYIDX_5]], align 4
-; THRESHOLD-NEXT:    [[ADD_5:%.*]] = fadd fast float [[TMP5]], [[ADD_4]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_6:%.*]] = getelementptr inbounds float, float* [[X]], i64 6
-; THRESHOLD-NEXT:    [[TMP6:%.*]] = load float, float* [[ARRAYIDX_6]], align 4
-; THRESHOLD-NEXT:    [[ADD_6:%.*]] = fadd fast float [[TMP6]], [[ADD_5]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_7:%.*]] = getelementptr inbounds float, float* [[X]], i64 7
-; THRESHOLD-NEXT:    [[TMP7:%.*]] = load float, float* [[ARRAYIDX_7]], align 4
-; THRESHOLD-NEXT:    [[ADD_7:%.*]] = fadd fast float [[TMP7]], [[ADD_6]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_8:%.*]] = getelementptr inbounds float, float* [[X]], i64 8
-; THRESHOLD-NEXT:    [[TMP8:%.*]] = load float, float* [[ARRAYIDX_8]], align 4
-; THRESHOLD-NEXT:    [[ADD_8:%.*]] = fadd fast float [[TMP8]], [[ADD_7]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_9:%.*]] = getelementptr inbounds float, float* [[X]], i64 9
-; THRESHOLD-NEXT:    [[TMP9:%.*]] = load float, float* [[ARRAYIDX_9]], align 4
-; THRESHOLD-NEXT:    [[ADD_9:%.*]] = fadd fast float [[TMP9]], [[ADD_8]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_10:%.*]] = getelementptr inbounds float, float* [[X]], i64 10
-; THRESHOLD-NEXT:    [[TMP10:%.*]] = load float, float* [[ARRAYIDX_10]], align 4
-; THRESHOLD-NEXT:    [[ADD_10:%.*]] = fadd fast float [[TMP10]], [[ADD_9]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_11:%.*]] = getelementptr inbounds float, float* [[X]], i64 11
-; THRESHOLD-NEXT:    [[TMP11:%.*]] = load float, float* [[ARRAYIDX_11]], align 4
-; THRESHOLD-NEXT:    [[ADD_11:%.*]] = fadd fast float [[TMP11]], [[ADD_10]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_12:%.*]] = getelementptr inbounds float, float* [[X]], i64 12
-; THRESHOLD-NEXT:    [[TMP12:%.*]] = load float, float* [[ARRAYIDX_12]], align 4
-; THRESHOLD-NEXT:    [[ADD_12:%.*]] = fadd fast float [[TMP12]], [[ADD_11]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_13:%.*]] = getelementptr inbounds float, float* [[X]], i64 13
-; THRESHOLD-NEXT:    [[TMP13:%.*]] = load float, float* [[ARRAYIDX_13]], align 4
-; THRESHOLD-NEXT:    [[ADD_13:%.*]] = fadd fast float [[TMP13]], [[ADD_12]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_14:%.*]] = getelementptr inbounds float, float* [[X]], i64 14
-; THRESHOLD-NEXT:    [[TMP14:%.*]] = load float, float* [[ARRAYIDX_14]], align 4
-; THRESHOLD-NEXT:    [[ADD_14:%.*]] = fadd fast float [[TMP14]], [[ADD_13]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_15:%.*]] = getelementptr inbounds float, float* [[X]], i64 15
-; THRESHOLD-NEXT:    [[TMP15:%.*]] = load float, float* [[ARRAYIDX_15]], align 4
-; THRESHOLD-NEXT:    [[ADD_15:%.*]] = fadd fast float [[TMP15]], [[ADD_14]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_16:%.*]] = getelementptr inbounds float, float* [[X]], i64 16
-; THRESHOLD-NEXT:    [[TMP16:%.*]] = load float, float* [[ARRAYIDX_16]], align 4
-; THRESHOLD-NEXT:    [[ADD_16:%.*]] = fadd fast float [[TMP16]], [[ADD_15]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_17:%.*]] = getelementptr inbounds float, float* [[X]], i64 17
-; THRESHOLD-NEXT:    [[TMP17:%.*]] = load float, float* [[ARRAYIDX_17]], align 4
-; THRESHOLD-NEXT:    [[ADD_17:%.*]] = fadd fast float [[TMP17]], [[ADD_16]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_18:%.*]] = getelementptr inbounds float, float* [[X]], i64 18
-; THRESHOLD-NEXT:    [[TMP18:%.*]] = load float, float* [[ARRAYIDX_18]], align 4
-; THRESHOLD-NEXT:    [[ADD_18:%.*]] = fadd fast float [[TMP18]], [[ADD_17]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_19:%.*]] = getelementptr inbounds float, float* [[X]], i64 19
-; THRESHOLD-NEXT:    [[TMP19:%.*]] = load float, float* [[ARRAYIDX_19]], align 4
-; THRESHOLD-NEXT:    [[ADD_19:%.*]] = fadd fast float [[TMP19]], [[ADD_18]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_20:%.*]] = getelementptr inbounds float, float* [[X]], i64 20
-; THRESHOLD-NEXT:    [[TMP20:%.*]] = load float, float* [[ARRAYIDX_20]], align 4
-; THRESHOLD-NEXT:    [[ADD_20:%.*]] = fadd fast float [[TMP20]], [[ADD_19]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_21:%.*]] = getelementptr inbounds float, float* [[X]], i64 21
-; THRESHOLD-NEXT:    [[TMP21:%.*]] = load float, float* [[ARRAYIDX_21]], align 4
-; THRESHOLD-NEXT:    [[ADD_21:%.*]] = fadd fast float [[TMP21]], [[ADD_20]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_22:%.*]] = getelementptr inbounds float, float* [[X]], i64 22
-; THRESHOLD-NEXT:    [[TMP22:%.*]] = load float, float* [[ARRAYIDX_22]], align 4
-; THRESHOLD-NEXT:    [[ADD_22:%.*]] = fadd fast float [[TMP22]], [[ADD_21]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_23:%.*]] = getelementptr inbounds float, float* [[X]], i64 23
-; THRESHOLD-NEXT:    [[TMP23:%.*]] = load float, float* [[ARRAYIDX_23]], align 4
-; THRESHOLD-NEXT:    [[ADD_23:%.*]] = fadd fast float [[TMP23]], [[ADD_22]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_24:%.*]] = getelementptr inbounds float, float* [[X]], i64 24
-; THRESHOLD-NEXT:    [[TMP24:%.*]] = load float, float* [[ARRAYIDX_24]], align 4
-; THRESHOLD-NEXT:    [[ADD_24:%.*]] = fadd fast float [[TMP24]], [[ADD_23]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_25:%.*]] = getelementptr inbounds float, float* [[X]], i64 25
-; THRESHOLD-NEXT:    [[TMP25:%.*]] = load float, float* [[ARRAYIDX_25]], align 4
-; THRESHOLD-NEXT:    [[ADD_25:%.*]] = fadd fast float [[TMP25]], [[ADD_24]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_26:%.*]] = getelementptr inbounds float, float* [[X]], i64 26
-; THRESHOLD-NEXT:    [[TMP26:%.*]] = load float, float* [[ARRAYIDX_26]], align 4
-; THRESHOLD-NEXT:    [[ADD_26:%.*]] = fadd fast float [[TMP26]], [[ADD_25]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_27:%.*]] = getelementptr inbounds float, float* [[X]], i64 27
-; THRESHOLD-NEXT:    [[TMP27:%.*]] = load float, float* [[ARRAYIDX_27]], align 4
-; THRESHOLD-NEXT:    [[ADD_27:%.*]] = fadd fast float [[TMP27]], [[ADD_26]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_28:%.*]] = getelementptr inbounds float, float* [[X]], i64 28
-; THRESHOLD-NEXT:    [[TMP28:%.*]] = load float, float* [[ARRAYIDX_28]], align 4
-; THRESHOLD-NEXT:    [[ADD_28:%.*]] = fadd fast float [[TMP28]], [[ADD_27]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_29:%.*]] = getelementptr inbounds float, float* [[X]], i64 29
-; THRESHOLD-NEXT:    [[TMP29:%.*]] = load float, float* [[ARRAYIDX_29]], align 4
-; THRESHOLD-NEXT:    [[ADD_29:%.*]] = fadd fast float [[TMP29]], [[ADD_28]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_30:%.*]] = getelementptr inbounds float, float* [[X]], i64 30
-; THRESHOLD-NEXT:    [[TMP30:%.*]] = load float, float* [[ARRAYIDX_30]], align 4
-; THRESHOLD-NEXT:    [[ADD_30:%.*]] = fadd fast float [[TMP30]], [[ADD_29]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX_31:%.*]] = getelementptr inbounds float, float* [[X]], i64 31
-; THRESHOLD-NEXT:    [[TMP31:%.*]] = load float, float* [[ARRAYIDX_31]], align 4
-; THRESHOLD-NEXT:    [[ADD_31:%.*]] = fadd fast float [[TMP31]], [[ADD_30]]
-; THRESHOLD-NEXT:    ret float [[ADD_31]]
+; THRESHOLD-NEXT:    [[TMP0:%.*]] = bitcast float* [[X]] to <32 x float>*
+; THRESHOLD-NEXT:    [[TMP1:%.*]] = load <32 x float>, <32 x float>* [[TMP0]], align 4
+; THRESHOLD-NEXT:    [[ADD:%.*]] = fadd fast float undef, [[CONV]]
+; THRESHOLD-NEXT:    [[ADD_1:%.*]] = fadd fast float undef, [[ADD]]
+; THRESHOLD-NEXT:    [[ADD_2:%.*]] = fadd fast float undef, [[ADD_1]]
+; THRESHOLD-NEXT:    [[ADD_3:%.*]] = fadd fast float undef, [[ADD_2]]
+; THRESHOLD-NEXT:    [[ADD_4:%.*]] = fadd fast float undef, [[ADD_3]]
+; THRESHOLD-NEXT:    [[ADD_5:%.*]] = fadd fast float undef, [[ADD_4]]
+; THRESHOLD-NEXT:    [[ADD_6:%.*]] = fadd fast float undef, [[ADD_5]]
+; THRESHOLD-NEXT:    [[ADD_7:%.*]] = fadd fast float undef, [[ADD_6]]
+; THRESHOLD-NEXT:    [[ADD_8:%.*]] = fadd fast float undef, [[ADD_7]]
+; THRESHOLD-NEXT:    [[ADD_9:%.*]] = fadd fast float undef, [[ADD_8]]
+; THRESHOLD-NEXT:    [[ADD_10:%.*]] = fadd fast float undef, [[ADD_9]]
+; THRESHOLD-NEXT:    [[ADD_11:%.*]] = fadd fast float undef, [[ADD_10]]
+; THRESHOLD-NEXT:    [[ADD_12:%.*]] = fadd fast float undef, [[ADD_11]]
+; THRESHOLD-NEXT:    [[ADD_13:%.*]] = fadd fast float undef, [[ADD_12]]
+; THRESHOLD-NEXT:    [[ADD_14:%.*]] = fadd fast float undef, [[ADD_13]]
+; THRESHOLD-NEXT:    [[ADD_15:%.*]] = fadd fast float undef, [[ADD_14]]
+; THRESHOLD-NEXT:    [[ADD_16:%.*]] = fadd fast float undef, [[ADD_15]]
+; THRESHOLD-NEXT:    [[ADD_17:%.*]] = fadd fast float undef, [[ADD_16]]
+; THRESHOLD-NEXT:    [[ADD_18:%.*]] = fadd fast float undef, [[ADD_17]]
+; THRESHOLD-NEXT:    [[ADD_19:%.*]] = fadd fast float undef, [[ADD_18]]
+; THRESHOLD-NEXT:    [[ADD_20:%.*]] = fadd fast float undef, [[ADD_19]]
+; THRESHOLD-NEXT:    [[ADD_21:%.*]] = fadd fast float undef, [[ADD_20]]
+; THRESHOLD-NEXT:    [[ADD_22:%.*]] = fadd fast float undef, [[ADD_21]]
+; THRESHOLD-NEXT:    [[ADD_23:%.*]] = fadd fast float undef, [[ADD_22]]
+; THRESHOLD-NEXT:    [[ADD_24:%.*]] = fadd fast float undef, [[ADD_23]]
+; THRESHOLD-NEXT:    [[ADD_25:%.*]] = fadd fast float undef, [[ADD_24]]
+; THRESHOLD-NEXT:    [[ADD_26:%.*]] = fadd fast float undef, [[ADD_25]]
+; THRESHOLD-NEXT:    [[ADD_27:%.*]] = fadd fast float undef, [[ADD_26]]
+; THRESHOLD-NEXT:    [[ADD_28:%.*]] = fadd fast float undef, [[ADD_27]]
+; THRESHOLD-NEXT:    [[ADD_29:%.*]] = fadd fast float undef, [[ADD_28]]
+; THRESHOLD-NEXT:    [[ADD_30:%.*]] = fadd fast float undef, [[ADD_29]]
+; THRESHOLD-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <32 x float> [[TMP1]], <32 x float> undef, <32 x i32> <i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX:%.*]] = fadd fast <32 x float> [[TMP1]], [[RDX_SHUF]]
+; THRESHOLD-NEXT:    [[RDX_SHUF1:%.*]] = shufflevector <32 x float> [[BIN_RDX]], <32 x float> undef, <32 x i32> <i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX2:%.*]] = fadd fast <32 x float> [[BIN_RDX]], [[RDX_SHUF1]]
+; THRESHOLD-NEXT:    [[RDX_SHUF3:%.*]] = shufflevector <32 x float> [[BIN_RDX2]], <32 x float> undef, <32 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX4:%.*]] = fadd fast <32 x float> [[BIN_RDX2]], [[RDX_SHUF3]]
+; THRESHOLD-NEXT:    [[RDX_SHUF5:%.*]] = shufflevector <32 x float> [[BIN_RDX4]], <32 x float> undef, <32 x i32> <i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX6:%.*]] = fadd fast <32 x float> [[BIN_RDX4]], [[RDX_SHUF5]]
+; THRESHOLD-NEXT:    [[RDX_SHUF7:%.*]] = shufflevector <32 x float> [[BIN_RDX6]], <32 x float> undef, <32 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX8:%.*]] = fadd fast <32 x float> [[BIN_RDX6]], [[RDX_SHUF7]]
+; THRESHOLD-NEXT:    [[TMP2:%.*]] = extractelement <32 x float> [[BIN_RDX8]], i32 0
+; THRESHOLD-NEXT:    [[BIN_EXTRA:%.*]] = fadd fast float [[TMP2]], [[CONV]]
+; THRESHOLD-NEXT:    [[ADD_31:%.*]] = fadd fast float undef, [[ADD_30]]
+; THRESHOLD-NEXT:    ret float [[BIN_EXTRA]]
 ;
   entry:
   %rem = srem i32 %a, %b
   %conv = sitofp i32 %rem to float
   %0 = load float, float* %x, align 4
   %add = fadd fast float %0, %conv
   %arrayidx.1 = getelementptr inbounds float, float* %x, i64 1
   %1 = load float, float* %arrayidx.1, align 4
;
   ret float %add.29
 }
 
 define float @extra_args(float* nocapture readonly %x, i32 %a, i32 %b) {
 ; CHECK-LABEL: @extra_args(
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[MUL:%.*]] = mul nsw i32 [[B:%.*]], [[A:%.*]]
 ; CHECK-NEXT:    [[CONV:%.*]] = sitofp i32 [[MUL]] to float
-; CHECK-NEXT:    [[TMP0:%.*]] = load float, float* [[X:%.*]], align 4
 ; CHECK-NEXT:    [[ADD:%.*]] = fadd fast float [[CONV]], 3.000000e+00
-; CHECK-NEXT:    [[ADD1:%.*]] = fadd fast float [[TMP0]], [[ADD]]
-; CHECK-NEXT:    [[ARRAYIDX3:%.*]] = getelementptr inbounds float, float* [[X]], i64 1
-; CHECK-NEXT:    [[TMP1:%.*]] = load float, float* [[ARRAYIDX3]], align 4
-; CHECK-NEXT:    [[ADD4:%.*]] = fadd fast float [[TMP1]], [[ADD1]]
-; CHECK-NEXT:    [[ADD5:%.*]] = fadd fast float [[ADD4]], [[CONV]]
+; CHECK-NEXT:    [[ARRAYIDX3:%.*]] = getelementptr inbounds float, float* [[X:%.*]], i64 1
 ; CHECK-NEXT:    [[ARRAYIDX3_1:%.*]] = getelementptr inbounds float, float* [[X]], i64 2
-; CHECK-NEXT:    [[TMP2:%.*]] = load float, float* [[ARRAYIDX3_1]], align 4
-; CHECK-NEXT:    [[ADD4_1:%.*]] = fadd fast float [[TMP2]], [[ADD5]]
 ; CHECK-NEXT:    [[ARRAYIDX3_2:%.*]] = getelementptr inbounds float, float* [[X]], i64 3
-; CHECK-NEXT:    [[TMP3:%.*]] = load float, float* [[ARRAYIDX3_2]], align 4
-; CHECK-NEXT:    [[ADD4_2:%.*]] = fadd fast float [[TMP3]], [[ADD4_1]]
 ; CHECK-NEXT:    [[ARRAYIDX3_3:%.*]] = getelementptr inbounds float, float* [[X]], i64 4
-; CHECK-NEXT:    [[TMP4:%.*]] = load float, float* [[ARRAYIDX3_3]], align 4
-; CHECK-NEXT:    [[ADD4_3:%.*]] = fadd fast float [[TMP4]], [[ADD4_2]]
 ; CHECK-NEXT:    [[ARRAYIDX3_4:%.*]] = getelementptr inbounds float, float* [[X]], i64 5
-; CHECK-NEXT:    [[TMP5:%.*]] = load float, float* [[ARRAYIDX3_4]], align 4
-; CHECK-NEXT:    [[ADD4_4:%.*]] = fadd fast float [[TMP5]], [[ADD4_3]]
 ; CHECK-NEXT:    [[ARRAYIDX3_5:%.*]] = getelementptr inbounds float, float* [[X]], i64 6
-; CHECK-NEXT:    [[TMP6:%.*]] = load float, float* [[ARRAYIDX3_5]], align 4
-; CHECK-NEXT:    [[ADD4_5:%.*]] = fadd fast float [[TMP6]], [[ADD4_4]]
 ; CHECK-NEXT:    [[ARRAYIDX3_6:%.*]] = getelementptr inbounds float, float* [[X]], i64 7
-; CHECK-NEXT:    [[TMP7:%.*]] = load float, float* [[ARRAYIDX3_6]], align 4
-; CHECK-NEXT:    [[ADD4_6:%.*]] = fadd fast float [[TMP7]], [[ADD4_5]]
-; CHECK-NEXT:    ret float [[ADD4_6]]
+; CHECK-NEXT:    [[TMP0:%.*]] = bitcast float* [[X]] to <8 x float>*
+; CHECK-NEXT:    [[TMP1:%.*]] = load <8 x float>, <8 x float>* [[TMP0]], align 4
+; CHECK-NEXT:    [[ADD1:%.*]] = fadd fast float undef, [[ADD]]
+; CHECK-NEXT:    [[ADD4:%.*]] = fadd fast float undef, [[ADD1]]
+; CHECK-NEXT:    [[ADD5:%.*]] = fadd fast float [[ADD4]], [[CONV]]
+; CHECK-NEXT:    [[ADD4_1:%.*]] = fadd fast float undef, [[ADD5]]
+; CHECK-NEXT:    [[ADD4_2:%.*]] = fadd fast float undef, [[ADD4_1]]
+; CHECK-NEXT:    [[ADD4_3:%.*]] = fadd fast float undef, [[ADD4_2]]
+; CHECK-NEXT:    [[ADD4_4:%.*]] = fadd fast float undef, [[ADD4_3]]
+; CHECK-NEXT:    [[ADD4_5:%.*]] = fadd fast float undef, [[ADD4_4]]
+; CHECK-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <8 x float> [[TMP1]], <8 x float> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX:%.*]] = fadd fast <8 x float> [[TMP1]], [[RDX_SHUF]]
+; CHECK-NEXT:    [[RDX_SHUF1:%.*]] = shufflevector <8 x float> [[BIN_RDX]], <8 x float> undef, <8 x i32> <i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX2:%.*]] = fadd fast <8 x float> [[BIN_RDX]], [[RDX_SHUF1]]
+; CHECK-NEXT:    [[RDX_SHUF3:%.*]] = shufflevector <8 x float> [[BIN_RDX2]], <8 x float> undef, <8 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX4:%.*]] = fadd fast <8 x float> [[BIN_RDX2]], [[RDX_SHUF3]]
+; CHECK-NEXT:    [[TMP2:%.*]] = extractelement <8 x float> [[BIN_RDX4]], i32 0
+; CHECK-NEXT:    [[BIN_EXTRA:%.*]] = fadd fast float [[TMP2]], [[ADD]]
+; CHECK-NEXT:    [[BIN_EXTRA5:%.*]] = fadd fast float [[BIN_EXTRA]], [[CONV]]
+; CHECK-NEXT:    [[ADD4_6:%.*]] = fadd fast float undef, [[ADD4_5]]
+; CHECK-NEXT:    ret float [[BIN_EXTRA5]]
 ;
 ; THRESHOLD-LABEL: @extra_args(
 ; THRESHOLD-NEXT:  entry:
 ; THRESHOLD-NEXT:    [[MUL:%.*]] = mul nsw i32 [[B:%.*]], [[A:%.*]]
 ; THRESHOLD-NEXT:    [[CONV:%.*]] = sitofp i32 [[MUL]] to float
-; THRESHOLD-NEXT:    [[TMP0:%.*]] = load float, float* [[X:%.*]], align 4
 ; THRESHOLD-NEXT:    [[ADD:%.*]] = fadd fast float [[CONV]], 3.000000e+00
-; THRESHOLD-NEXT:    [[ADD1:%.*]] = fadd fast float [[TMP0]], [[ADD]]
-; THRESHOLD-NEXT:    [[ARRAYIDX3:%.*]] = getelementptr inbounds float, float* [[X]], i64 1
-; THRESHOLD-NEXT:    [[TMP1:%.*]] = load float, float* [[ARRAYIDX3]], align 4
-; THRESHOLD-NEXT:    [[ADD4:%.*]] = fadd fast float [[TMP1]], [[ADD1]]
-; THRESHOLD-NEXT:    [[ADD5:%.*]] = fadd fast float [[ADD4]], [[CONV]]
+; THRESHOLD-NEXT:    [[ARRAYIDX3:%.*]] = getelementptr inbounds float, float* [[X:%.*]], i64 1
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_1:%.*]] = getelementptr inbounds float, float* [[X]], i64 2
-; THRESHOLD-NEXT:    [[TMP2:%.*]] = load float, float* [[ARRAYIDX3_1]], align 4
-; THRESHOLD-NEXT:    [[ADD4_1:%.*]] = fadd fast float [[TMP2]], [[ADD5]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_2:%.*]] = getelementptr inbounds float, float* [[X]], i64 3
-; THRESHOLD-NEXT:    [[TMP3:%.*]] = load float, float* [[ARRAYIDX3_2]], align 4
-; THRESHOLD-NEXT:    [[ADD4_2:%.*]] = fadd fast float [[TMP3]], [[ADD4_1]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_3:%.*]] = getelementptr inbounds float, float* [[X]], i64 4
-; THRESHOLD-NEXT:    [[TMP4:%.*]] = load float, float* [[ARRAYIDX3_3]], align 4
-; THRESHOLD-NEXT:    [[ADD4_3:%.*]] = fadd fast float [[TMP4]], [[ADD4_2]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_4:%.*]] = getelementptr inbounds float, float* [[X]], i64 5
-; THRESHOLD-NEXT:    [[TMP5:%.*]] = load float, float* [[ARRAYIDX3_4]], align 4
-; THRESHOLD-NEXT:    [[ADD4_4:%.*]] = fadd fast float [[TMP5]], [[ADD4_3]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_5:%.*]] = getelementptr inbounds float, float* [[X]], i64 6
-; THRESHOLD-NEXT:    [[TMP6:%.*]] = load float, float* [[ARRAYIDX3_5]], align 4
-; THRESHOLD-NEXT:    [[ADD4_5:%.*]] = fadd fast float [[TMP6]], [[ADD4_4]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_6:%.*]] = getelementptr inbounds float, float* [[X]], i64 7
-; THRESHOLD-NEXT:    [[TMP7:%.*]] = load float, float* [[ARRAYIDX3_6]], align 4
-; THRESHOLD-NEXT:    [[ADD4_6:%.*]] = fadd fast float [[TMP7]], [[ADD4_5]]
-; THRESHOLD-NEXT:    ret float [[ADD4_6]]
+; THRESHOLD-NEXT:    [[TMP0:%.*]] = bitcast float* [[X]] to <8 x float>*
+; THRESHOLD-NEXT:    [[TMP1:%.*]] = load <8 x float>, <8 x float>* [[TMP0]], align 4
+; THRESHOLD-NEXT:    [[ADD1:%.*]] = fadd fast float undef, [[ADD]]
+; THRESHOLD-NEXT:    [[ADD4:%.*]] = fadd fast float undef, [[ADD1]]
+; THRESHOLD-NEXT:    [[ADD5:%.*]] = fadd fast float [[ADD4]], [[CONV]]
+; THRESHOLD-NEXT:    [[ADD4_1:%.*]] = fadd fast float undef, [[ADD5]]
+; THRESHOLD-NEXT:    [[ADD4_2:%.*]] = fadd fast float undef, [[ADD4_1]]
+; THRESHOLD-NEXT:    [[ADD4_3:%.*]] = fadd fast float undef, [[ADD4_2]]
+; THRESHOLD-NEXT:    [[ADD4_4:%.*]] = fadd fast float undef, [[ADD4_3]]
+; THRESHOLD-NEXT:    [[ADD4_5:%.*]] = fadd fast float undef, [[ADD4_4]]
+; THRESHOLD-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <8 x float> [[TMP1]], <8 x float> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX:%.*]] = fadd fast <8 x float> [[TMP1]], [[RDX_SHUF]]
+; THRESHOLD-NEXT:    [[RDX_SHUF1:%.*]] = shufflevector <8 x float> [[BIN_RDX]], <8 x float> undef, <8 x i32> <i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX2:%.*]] = fadd fast <8 x float> [[BIN_RDX]], [[RDX_SHUF1]]
+; THRESHOLD-NEXT:    [[RDX_SHUF3:%.*]] = shufflevector <8 x float> [[BIN_RDX2]], <8 x float> undef, <8 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX4:%.*]] = fadd fast <8 x float> [[BIN_RDX2]], [[RDX_SHUF3]]
+; THRESHOLD-NEXT:    [[TMP2:%.*]] = extractelement <8 x float> [[BIN_RDX4]], i32 0
+; THRESHOLD-NEXT:    [[BIN_EXTRA:%.*]] = fadd fast float [[TMP2]], [[ADD]]
+; THRESHOLD-NEXT:    [[BIN_EXTRA5:%.*]] = fadd fast float [[BIN_EXTRA]], [[CONV]]
+; THRESHOLD-NEXT:    [[ADD4_6:%.*]] = fadd fast float undef, [[ADD4_5]]
+; THRESHOLD-NEXT:    ret float [[BIN_EXTRA5]]
 ;
   entry:
   %mul = mul nsw i32 %b, %a
   %conv = sitofp i32 %mul to float
   %0 = load float, float* %x, align 4
   %add = fadd fast float %conv, 3.000000e+00
   %add1 = fadd fast float %0, %add
   %arrayidx3 = getelementptr inbounds float, float* %x, i64 1
;
   ret float %add4.6
 }
 
 define float @extra_args_no_replace(float* nocapture readonly %x, i32 %a, i32 %b, i32 %c) {
 ; CHECK-LABEL: @extra_args_no_replace(
 ; CHECK-NEXT:  entry:
 ; CHECK-NEXT:    [[MUL:%.*]] = mul nsw i32 [[B:%.*]], [[A:%.*]]
 ; CHECK-NEXT:    [[CONV:%.*]] = sitofp i32 [[MUL]] to float
-; CHECK-NEXT:    [[TMP0:%.*]] = load float, float* [[X:%.*]], align 4
 ; CHECK-NEXT:    [[CONVC:%.*]] = sitofp i32 [[C:%.*]] to float
 ; CHECK-NEXT:    [[ADDC:%.*]] = fadd fast float [[CONVC]], 3.000000e+00
 ; CHECK-NEXT:    [[ADD:%.*]] = fadd fast float [[CONV]], [[ADDC]]
-; CHECK-NEXT:    [[ADD1:%.*]] = fadd fast float [[TMP0]], [[ADD]]
-; CHECK-NEXT:    [[ARRAYIDX3:%.*]] = getelementptr inbounds float, float* [[X]], i64 1
-; CHECK-NEXT:    [[TMP1:%.*]] = load float, float* [[ARRAYIDX3]], align 4
-; CHECK-NEXT:    [[ADD4:%.*]] = fadd fast float [[TMP1]], [[ADD1]]
+; CHECK-NEXT:    [[ARRAYIDX3:%.*]] = getelementptr inbounds float, float* [[X:%.*]], i64 1
 ; CHECK-NEXT:    [[ARRAYIDX3_1:%.*]] = getelementptr inbounds float, float* [[X]], i64 2
-; CHECK-NEXT:    [[TMP2:%.*]] = load float, float* [[ARRAYIDX3_1]], align 4
-; CHECK-NEXT:    [[ADD4_1:%.*]] = fadd fast float [[TMP2]], [[ADD4]]
 ; CHECK-NEXT:    [[ARRAYIDX3_2:%.*]] = getelementptr inbounds float, float* [[X]], i64 3
-; CHECK-NEXT:    [[TMP3:%.*]] = load float, float* [[ARRAYIDX3_2]], align 4
-; CHECK-NEXT:    [[ADD4_2:%.*]] = fadd fast float [[TMP3]], [[ADD4_1]]
 ; CHECK-NEXT:    [[ARRAYIDX3_3:%.*]] = getelementptr inbounds float, float* [[X]], i64 4
-; CHECK-NEXT:    [[TMP4:%.*]] = load float, float* [[ARRAYIDX3_3]], align 4
-; CHECK-NEXT:    [[ADD4_3:%.*]] = fadd fast float [[TMP4]], [[ADD4_2]]
-; CHECK-NEXT:    [[ADD5:%.*]] = fadd fast float [[ADD4_3]], [[CONV]]
 ; CHECK-NEXT:    [[ARRAYIDX3_4:%.*]] = getelementptr inbounds float, float* [[X]], i64 5
-; CHECK-NEXT:    [[TMP5:%.*]] = load float, float* [[ARRAYIDX3_4]], align 4
-; CHECK-NEXT:    [[ADD4_4:%.*]] = fadd fast float [[TMP5]], [[ADD5]]
 ; CHECK-NEXT:    [[ARRAYIDX3_5:%.*]] = getelementptr inbounds float, float* [[X]], i64 6
-; CHECK-NEXT:    [[TMP6:%.*]] = load float, float* [[ARRAYIDX3_5]], align 4
-; CHECK-NEXT:    [[ADD4_5:%.*]] = fadd fast float [[TMP6]], [[ADD4_4]]
 ; CHECK-NEXT:    [[ARRAYIDX3_6:%.*]] = getelementptr inbounds float, float* [[X]], i64 7
-; CHECK-NEXT:    [[TMP7:%.*]] = load float, float* [[ARRAYIDX3_6]], align 4
-; CHECK-NEXT:    [[ADD4_6:%.*]] = fadd fast float [[TMP7]], [[ADD4_5]]
-; CHECK-NEXT:    ret float [[ADD4_6]]
+; CHECK-NEXT:    [[TMP0:%.*]] = bitcast float* [[X]] to <8 x float>*
+; CHECK-NEXT:    [[TMP1:%.*]] = load <8 x float>, <8 x float>* [[TMP0]], align 4
+; CHECK-NEXT:    [[ADD1:%.*]] = fadd fast float undef, [[ADD]]
+; CHECK-NEXT:    [[ADD4:%.*]] = fadd fast float undef, [[ADD1]]
+; CHECK-NEXT:    [[ADD4_1:%.*]] = fadd fast float undef, [[ADD4]]
+; CHECK-NEXT:    [[ADD4_2:%.*]] = fadd fast float undef, [[ADD4_1]]
+; CHECK-NEXT:    [[ADD4_3:%.*]] = fadd fast float undef, [[ADD4_2]]
+; CHECK-NEXT:    [[ADD5:%.*]] = fadd fast float [[ADD4_3]], [[CONV]]
+; CHECK-NEXT:    [[ADD4_4:%.*]] = fadd fast float undef, [[ADD5]]
+; CHECK-NEXT:    [[ADD4_5:%.*]] = fadd fast float undef, [[ADD4_4]]
+; CHECK-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <8 x float> [[TMP1]], <8 x float> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX:%.*]] = fadd fast <8 x float> [[TMP1]], [[RDX_SHUF]]
+; CHECK-NEXT:    [[RDX_SHUF1:%.*]] = shufflevector <8 x float> [[BIN_RDX]], <8 x float> undef, <8 x i32> <i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX2:%.*]] = fadd fast <8 x float> [[BIN_RDX]], [[RDX_SHUF1]]
+; CHECK-NEXT:    [[RDX_SHUF3:%.*]] = shufflevector <8 x float> [[BIN_RDX2]], <8 x float> undef, <8 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX4:%.*]] = fadd fast <8 x float> [[BIN_RDX2]], [[RDX_SHUF3]]
+; CHECK-NEXT:    [[TMP2:%.*]] = extractelement <8 x float> [[BIN_RDX4]], i32 0
+; CHECK-NEXT:    [[BIN_EXTRA:%.*]] = fadd fast float [[TMP2]], [[ADD]]
+; CHECK-NEXT:    [[BIN_EXTRA5:%.*]] = fadd fast float [[BIN_EXTRA]], [[CONV]]
+; CHECK-NEXT:    [[ADD4_6:%.*]] = fadd fast float undef, [[ADD4_5]]
+; CHECK-NEXT:    ret float [[BIN_EXTRA5]]
 ;
 ; THRESHOLD-LABEL: @extra_args_no_replace(
 ; THRESHOLD-NEXT:  entry:
 ; THRESHOLD-NEXT:    [[MUL:%.*]] = mul nsw i32 [[B:%.*]], [[A:%.*]]
 ; THRESHOLD-NEXT:    [[CONV:%.*]] = sitofp i32 [[MUL]] to float
-; THRESHOLD-NEXT:    [[TMP0:%.*]] = load float, float* [[X:%.*]], align 4
 ; THRESHOLD-NEXT:    [[CONVC:%.*]] = sitofp i32 [[C:%.*]] to float
 ; THRESHOLD-NEXT:    [[ADDC:%.*]] = fadd fast float [[CONVC]], 3.000000e+00
 ; THRESHOLD-NEXT:    [[ADD:%.*]] = fadd fast float [[CONV]], [[ADDC]]
-; THRESHOLD-NEXT:    [[ADD1:%.*]] = fadd fast float [[TMP0]], [[ADD]]
-; THRESHOLD-NEXT:    [[ARRAYIDX3:%.*]] = getelementptr inbounds float, float* [[X]], i64 1
-; THRESHOLD-NEXT:    [[TMP1:%.*]] = load float, float* [[ARRAYIDX3]], align 4
-; THRESHOLD-NEXT:    [[ADD4:%.*]] = fadd fast float [[TMP1]], [[ADD1]]
+; THRESHOLD-NEXT:    [[ARRAYIDX3:%.*]] = getelementptr inbounds float, float* [[X:%.*]], i64 1
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_1:%.*]] = getelementptr inbounds float, float* [[X]], i64 2
-; THRESHOLD-NEXT:    [[TMP2:%.*]] = load float, float* [[ARRAYIDX3_1]], align 4
-; THRESHOLD-NEXT:    [[ADD4_1:%.*]] = fadd fast float [[TMP2]], [[ADD4]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_2:%.*]] = getelementptr inbounds float, float* [[X]], i64 3
-; THRESHOLD-NEXT:    [[TMP3:%.*]] = load float, float* [[ARRAYIDX3_2]], align 4
-; THRESHOLD-NEXT:    [[ADD4_2:%.*]] = fadd fast float [[TMP3]], [[ADD4_1]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_3:%.*]] = getelementptr inbounds float, float* [[X]], i64 4
-; THRESHOLD-NEXT:    [[TMP4:%.*]] = load float, float* [[ARRAYIDX3_3]], align 4
-; THRESHOLD-NEXT:    [[ADD4_3:%.*]] = fadd fast float [[TMP4]], [[ADD4_2]]
-; THRESHOLD-NEXT:    [[ADD5:%.*]] = fadd fast float [[ADD4_3]], [[CONV]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_4:%.*]] = getelementptr inbounds float, float* [[X]], i64 5
-; THRESHOLD-NEXT:    [[TMP5:%.*]] = load float, float* [[ARRAYIDX3_4]], align 4
-; THRESHOLD-NEXT:    [[ADD4_4:%.*]] = fadd fast float [[TMP5]], [[ADD5]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_5:%.*]] = getelementptr inbounds float, float* [[X]], i64 6
-; THRESHOLD-NEXT:    [[TMP6:%.*]] = load float, float* [[ARRAYIDX3_5]], align 4
-; THRESHOLD-NEXT:    [[ADD4_5:%.*]] = fadd fast float [[TMP6]], [[ADD4_4]]
 ; THRESHOLD-NEXT:    [[ARRAYIDX3_6:%.*]] = getelementptr inbounds float, float* [[X]], i64 7
-; THRESHOLD-NEXT:    [[TMP7:%.*]] = load float, float* [[ARRAYIDX3_6]], align 4
-; THRESHOLD-NEXT:    [[ADD4_6:%.*]] = fadd fast float [[TMP7]], [[ADD4_5]]
-; THRESHOLD-NEXT:    ret float [[ADD4_6]]
+; THRESHOLD-NEXT:    [[TMP0:%.*]] = bitcast float* [[X]] to <8 x float>*
+; THRESHOLD-NEXT:    [[TMP1:%.*]] = load <8 x float>, <8 x float>* [[TMP0]], align 4
+; THRESHOLD-NEXT:    [[ADD1:%.*]] = fadd fast float undef, [[ADD]]
+; THRESHOLD-NEXT:    [[ADD4:%.*]] = fadd fast float undef, [[ADD1]]
+; THRESHOLD-NEXT:    [[ADD4_1:%.*]] = fadd fast float undef, [[ADD4]]
+; THRESHOLD-NEXT:    [[ADD4_2:%.*]] = fadd fast float undef, [[ADD4_1]]
+; THRESHOLD-NEXT:    [[ADD4_3:%.*]] = fadd fast float undef, [[ADD4_2]]
+; THRESHOLD-NEXT:    [[ADD5:%.*]] = fadd fast float [[ADD4_3]], [[CONV]]
+; THRESHOLD-NEXT:    [[ADD4_4:%.*]] = fadd fast float undef, [[ADD5]]
+; THRESHOLD-NEXT:    [[ADD4_5:%.*]] = fadd fast float undef, [[ADD4_4]]
+; THRESHOLD-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <8 x float> [[TMP1]], <8 x float> undef, <8 x i32> <i32 4, i32 5, i32 6, i32 7, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX:%.*]] = fadd fast <8 x float> [[TMP1]], [[RDX_SHUF]]
+; THRESHOLD-NEXT:    [[RDX_SHUF1:%.*]] = shufflevector <8 x float> [[BIN_RDX]], <8 x float> undef, <8 x i32> <i32 2, i32 3, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX2:%.*]] = fadd fast <8 x float> [[BIN_RDX]], [[RDX_SHUF1]]
+; THRESHOLD-NEXT:    [[RDX_SHUF3:%.*]] = shufflevector <8 x float> [[BIN_RDX2]], <8 x float> undef, <8 x i32> <i32 1, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX4:%.*]] = fadd fast <8 x float> [[BIN_RDX2]], [[RDX_SHUF3]]
+; THRESHOLD-NEXT:    [[TMP2:%.*]] = extractelement <8 x float> [[BIN_RDX4]], i32 0
+; THRESHOLD-NEXT:    [[BIN_EXTRA:%.*]] = fadd fast float [[TMP2]], [[ADD]]
+; THRESHOLD-NEXT:    [[BIN_EXTRA5:%.*]] = fadd fast float [[BIN_EXTRA]], [[CONV]]
+; THRESHOLD-NEXT:    [[ADD4_6:%.*]] = fadd fast float undef, [[ADD4_5]]
+; THRESHOLD-NEXT:    ret float [[BIN_EXTRA5]]
 ;
   entry:
   %mul = mul nsw i32 %b, %a
   %conv = sitofp i32 %mul to float
   %0 = load float, float* %x, align 4
   %convc = sitofp i32 %c to float
   %addc = fadd fast float %convc, 3.000000e+00
   %add = fadd fast float %conv, %addc
;
   %7 = load float, float* %arrayidx3.6, align 4
   %add4.6 = fadd fast float %7, %add4.5
   ret float %add4.6
 }
 
 define i32 @wobble(i32 %arg, i32 %bar) {
 ; CHECK-LABEL: @wobble(
 ; CHECK-NEXT:  bb:
-; CHECK-NEXT:    [[X1:%.*]] = xor i32 [[ARG:%.*]], [[BAR:%.*]]
-; CHECK-NEXT:    [[I1:%.*]] = icmp eq i32 [[X1]], 0
-; CHECK-NEXT:    [[S1:%.*]] = sext i1 [[I1]] to i32
-; CHECK-NEXT:    [[X2:%.*]] = xor i32 [[ARG]], [[BAR]]
-; CHECK-NEXT:    [[I2:%.*]] = icmp eq i32 [[X2]], 0
-; CHECK-NEXT:    [[S2:%.*]] = sext i1 [[I2]] to i32
-; CHECK-NEXT:    [[X3:%.*]] = xor i32 [[ARG]], [[BAR]]
-; CHECK-NEXT:    [[I3:%.*]] = icmp eq i32 [[X3]], 0
-; CHECK-NEXT:    [[S3:%.*]] = sext i1 [[I3]] to i32
-; CHECK-NEXT:    [[X4:%.*]] = xor i32 [[ARG]], [[BAR]]
-; CHECK-NEXT:    [[I4:%.*]] = icmp eq i32 [[X4]], 0
-; CHECK-NEXT:    [[S4:%.*]] = sext i1 [[I4]] to i32
-; CHECK-NEXT:    [[R1:%.*]] = add i32 [[ARG]], [[S1]]
-; CHECK-NEXT:    [[R2:%.*]] = add i32 [[R1]], [[S2]]
-; CHECK-NEXT:    [[R3:%.*]] = add i32 [[R2]], [[S3]]
-; CHECK-NEXT:    [[R4:%.*]] = add i32 [[R3]], [[S4]]
-; CHECK-NEXT:    [[R5:%.*]] = add i32 [[R4]], [[X4]]
-; CHECK-NEXT:    ret i32 [[R5]]
+; CHECK-NEXT:    [[TMP0:%.*]] = insertelement <4 x i32> undef, i32 [[ARG:%.*]], i32 0
+; CHECK-NEXT:    [[TMP1:%.*]] = insertelement <4 x i32> [[TMP0]], i32 [[ARG]], i32 1
+; CHECK-NEXT:    [[TMP2:%.*]] = insertelement <4 x i32> [[TMP1]], i32 [[ARG]], i32 2
+; CHECK-NEXT:    [[TMP3:%.*]] = insertelement <4 x i32> [[TMP2]], i32 [[ARG]], i32 3
+; CHECK-NEXT:    [[TMP4:%.*]] = insertelement <4 x i32> undef, i32 [[BAR:%.*]], i32 0
+; CHECK-NEXT:    [[TMP5:%.*]] = insertelement <4 x i32> [[TMP4]], i32 [[BAR]], i32 1
+; CHECK-NEXT:    [[TMP6:%.*]] = insertelement <4 x i32> [[TMP5]], i32 [[BAR]], i32 2
+; CHECK-NEXT:    [[TMP7:%.*]] = insertelement <4 x i32> [[TMP6]], i32 [[BAR]], i32 3
+; CHECK-NEXT:    [[TMP8:%.*]] = xor <4 x i32> [[TMP3]], [[TMP7]]
+; CHECK-NEXT:    [[TMP9:%.*]] = extractelement <4 x i32> [[TMP8]], i32 3
+; CHECK-NEXT:    [[TMP10:%.*]] = icmp eq <4 x i32> [[TMP8]], zeroinitializer
+; CHECK-NEXT:    [[TMP11:%.*]] = sext <4 x i1> [[TMP10]] to <4 x i32>
+; CHECK-NEXT:    [[R1:%.*]] = add i32 [[ARG]], undef
+; CHECK-NEXT:    [[R2:%.*]] = add i32 [[R1]], undef
+; CHECK-NEXT:    [[R3:%.*]] = add i32 [[R2]], undef
+; CHECK-NEXT:    [[R4:%.*]] = add i32 [[R3]], undef
+; CHECK-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <4 x i32> [[TMP11]], <4 x i32> undef, <4 x i32> <i32 2, i32 3, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX:%.*]] = add <4 x i32> [[TMP11]], [[RDX_SHUF]]
+; CHECK-NEXT:    [[RDX_SHUF1:%.*]] = shufflevector <4 x i32> [[BIN_RDX]], <4 x i32> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
+; CHECK-NEXT:    [[BIN_RDX2:%.*]] = add <4 x i32> [[BIN_RDX]], [[RDX_SHUF1]]
+; CHECK-NEXT:    [[TMP12:%.*]] = extractelement <4 x i32> [[BIN_RDX2]], i32 0
+; CHECK-NEXT:    [[BIN_EXTRA:%.*]] = add i32 [[TMP12]], [[ARG]]
+; CHECK-NEXT:    [[BIN_EXTRA3:%.*]] = add i32 [[BIN_EXTRA]], [[TMP9]]
+; CHECK-NEXT:    [[R5:%.*]] = add i32 [[R4]], undef
+; CHECK-NEXT:    ret i32 [[BIN_EXTRA3]]
 ;
 ; THRESHOLD-LABEL: @wobble(
 ; THRESHOLD-NEXT:  bb:
-; THRESHOLD-NEXT:    [[X1:%.*]] = xor i32 [[ARG:%.*]], [[BAR:%.*]]
-; THRESHOLD-NEXT:    [[I1:%.*]] = icmp eq i32 [[X1]], 0
-; THRESHOLD-NEXT:    [[S1:%.*]] = sext i1 [[I1]] to i32
-; THRESHOLD-NEXT:    [[X2:%.*]] = xor i32 [[ARG]], [[BAR]]
-; THRESHOLD-NEXT:    [[I2:%.*]] = icmp eq i32 [[X2]], 0
-; THRESHOLD-NEXT:    [[S2:%.*]] = sext i1 [[I2]] to i32
-; THRESHOLD-NEXT:    [[X3:%.*]] = xor i32 [[ARG]], [[BAR]]
-; THRESHOLD-NEXT:    [[I3:%.*]] = icmp eq i32 [[X3]], 0
-; THRESHOLD-NEXT:    [[S3:%.*]] = sext i1 [[I3]] to i32
-; THRESHOLD-NEXT:    [[X4:%.*]] = xor i32 [[ARG]], [[BAR]]
-; THRESHOLD-NEXT:    [[I4:%.*]] = icmp eq i32 [[X4]], 0
-; THRESHOLD-NEXT:    [[S4:%.*]] = sext i1 [[I4]] to i32
-; THRESHOLD-NEXT:    [[R1:%.*]] = add i32 [[ARG]], [[S1]]
-; THRESHOLD-NEXT:    [[R2:%.*]] = add i32 [[R1]], [[S2]]
-; THRESHOLD-NEXT:    [[R3:%.*]] = add i32 [[R2]], [[S3]]
-; THRESHOLD-NEXT:    [[R4:%.*]] = add i32 [[R3]], [[S4]]
-; THRESHOLD-NEXT:    [[R5:%.*]] = add i32 [[R4]], [[X4]]
-; THRESHOLD-NEXT:    ret i32 [[R5]]
+; THRESHOLD-NEXT:    [[TMP0:%.*]] = insertelement <4 x i32> undef, i32 [[ARG:%.*]], i32 0
+; THRESHOLD-NEXT:    [[TMP1:%.*]] = insertelement <4 x i32> [[TMP0]], i32 [[ARG]], i32 1
+; THRESHOLD-NEXT:    [[TMP2:%.*]] = insertelement <4 x i32> [[TMP1]], i32 [[ARG]], i32 2
+; THRESHOLD-NEXT:    [[TMP3:%.*]] = insertelement <4 x i32> [[TMP2]], i32 [[ARG]], i32 3
+; THRESHOLD-NEXT:    [[TMP4:%.*]] = insertelement <4 x i32> undef, i32 [[BAR:%.*]], i32 0
+; THRESHOLD-NEXT:    [[TMP5:%.*]] = insertelement <4 x i32> [[TMP4]], i32 [[BAR]], i32 1
+; THRESHOLD-NEXT:    [[TMP6:%.*]] = insertelement <4 x i32> [[TMP5]], i32 [[BAR]], i32 2
+; THRESHOLD-NEXT:    [[TMP7:%.*]] = insertelement <4 x i32> [[TMP6]], i32 [[BAR]], i32 3
+; THRESHOLD-NEXT:    [[TMP8:%.*]] = xor <4 x i32> [[TMP3]], [[TMP7]]
+; THRESHOLD-NEXT:    [[TMP9:%.*]] = extractelement <4 x i32> [[TMP8]], i32 3
+; THRESHOLD-NEXT:    [[TMP10:%.*]] = icmp eq <4 x i32> [[TMP8]], zeroinitializer
+; THRESHOLD-NEXT:    [[TMP11:%.*]] = sext <4 x i1> [[TMP10]] to <4 x i32>
+; THRESHOLD-NEXT:    [[R1:%.*]] = add i32 [[ARG]], undef
+; THRESHOLD-NEXT:    [[R2:%.*]] = add i32 [[R1]], undef
+; THRESHOLD-NEXT:    [[R3:%.*]] = add i32 [[R2]], undef
+; THRESHOLD-NEXT:    [[R4:%.*]] = add i32 [[R3]], undef
+; THRESHOLD-NEXT:    [[RDX_SHUF:%.*]] = shufflevector <4 x i32> [[TMP11]], <4 x i32> undef, <4 x i32> <i32 2, i32 3, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX:%.*]] = add <4 x i32> [[TMP11]], [[RDX_SHUF]]
+; THRESHOLD-NEXT:    [[RDX_SHUF1:%.*]] = shufflevector <4 x i32> [[BIN_RDX]], <4 x i32> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
+; THRESHOLD-NEXT:    [[BIN_RDX2:%.*]] = add <4 x i32> [[BIN_RDX]], [[RDX_SHUF1]]
+; THRESHOLD-NEXT:    [[TMP12:%.*]] = extractelement <4 x i32> [[BIN_RDX2]], i32 0
+; THRESHOLD-NEXT:    [[BIN_EXTRA:%.*]] = add i32 [[TMP12]], [[ARG]]
+; THRESHOLD-NEXT:    [[BIN_EXTRA3:%.*]] = add i32 [[BIN_EXTRA]], [[TMP9]]
+; THRESHOLD-NEXT:    [[R5:%.*]] = add i32 [[R4]], undef
+; THRESHOLD-NEXT:    ret i32 [[BIN_EXTRA3]]
 ;
   bb:
   %x1 = xor i32 %arg, %bar
   %i1 = icmp eq i32 %x1, 0
   %s1 = sext i1 %i1 to i32
   %x2 = xor i32 %arg, %bar
   %i2 = icmp eq i32 %x2, 0
   %s2 = sext i1 %i2 to i32