diff --git a/lib/Transforms/Vectorize/SLPVectorizer.cpp b/lib/Transforms/Vectorize/SLPVectorizer.cpp
index 80d9ffccafb..0dec4b05f95 100644
--- a/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -947,6 +947,39 @@ void BoUpSLP::buildTree_rec(ArrayRef<Value *> VL, unsigned Depth) {
       buildTree_rec(Operands, Depth + 1);
       return;
     }
+    case Instruction::Call: {
+      // Check if the calls are all to the same vectorizable intrinsic.
+      IntrinsicInst *II = dyn_cast<IntrinsicInst>(VL[0]);
+      if (II==NULL) {
+        newTreeEntry(VL, false);
+        DEBUG(dbgs() << "SLP: Non-vectorizable call.\n");
+        return;
+      }
+
+      Intrinsic::ID ID = II->getIntrinsicID();
+
+      for (unsigned i = 1, e = VL.size(); i != e; ++i) {
+        IntrinsicInst *II2 = dyn_cast<IntrinsicInst>(VL[i]);
+        if (!II2 || II2->getIntrinsicID() != ID) {
+          newTreeEntry(VL, false);
+          DEBUG(dbgs() << "SLP: mismatched calls:" << *II << "!=" << *VL[i]
+                       << "\n");
+          return;
+        }
+      }
+
+      newTreeEntry(VL, true);
+      for (unsigned i = 0, e = II->getNumArgOperands(); i != e; ++i) {
+        ValueList Operands;
+        // Prepare the operand vector.
+        for (unsigned j = 0; j < VL.size(); ++j) {
+          IntrinsicInst *II2 = dyn_cast<IntrinsicInst>(VL[j]);
+          Operands.push_back(II2->getArgOperand(i));
+        }
+        buildTree_rec(Operands, Depth + 1);
+      }
+      return;
+    }
     default:
       newTreeEntry(VL, false);
       DEBUG(dbgs() << "SLP: Gathering unknown instruction.\n");
@@ -1072,6 +1105,30 @@ int BoUpSLP::getEntryCost(TreeEntry *E) {
       int VecStCost = TTI->getMemoryOpCost(Instruction::Store, VecTy, 1, 0);
       return VecStCost - ScalarStCost;
     }
+    case Instruction::Call: {
+      CallInst *CI = cast<CallInst>(VL0);
+      IntrinsicInst *II = cast<IntrinsicInst>(CI);
+      Intrinsic::ID ID = II->getIntrinsicID();
+
+      // Calculate the cost of the scalar and vector calls.
+      SmallVector<Type*, 4> ScalarTys, VecTys;
+      for (unsigned op = 0, opc = II->getNumArgOperands(); op!= opc; ++op) {
+        ScalarTys.push_back(CI->getArgOperand(op)->getType());
+        VecTys.push_back(VectorType::get(CI->getArgOperand(op)->getType(),
+                                         VecTy->getNumElements()));
+      }
+
+      int ScalarCallCost = VecTy->getNumElements() *
+          TTI->getIntrinsicInstrCost(ID, ScalarTy, ScalarTys);
+
+      int VecCallCost = TTI->getIntrinsicInstrCost(ID, VecTy, VecTys);
+
+      DEBUG(dbgs() << "SLP: Call cost "<< VecCallCost - ScalarCallCost
+            << " (" << VecCallCost  << "-" <<  ScalarCallCost << ")"
+            << " for " << *II << "\n");
+
+      return VecCallCost - ScalarCallCost;
+    }
     default:
       llvm_unreachable("Unknown instruction");
   }
@@ -1086,10 +1143,10 @@ bool BoUpSLP::isFullyVectorizableTinyTree() {
     return false;
 
   // Gathering cost would be too much for tiny trees.
-  if (VectorizableTree[0].NeedToGather || VectorizableTree[1].NeedToGather) 
-    return false; 
+  if (VectorizableTree[0].NeedToGather || VectorizableTree[1].NeedToGather)
+    return false;
 
-  return true; 
+  return true;
 }
 
 int BoUpSLP::getTreeCost() {
@@ -1555,6 +1612,32 @@ Value *BoUpSLP::vectorizeTree(TreeEntry *E) {
       E->VectorizedValue = S;
       return propagateMetadata(S, E->Scalars);
     }
+    case Instruction::Call: {
+      CallInst *CI = cast<CallInst>(VL0);
+
+      setInsertPointAfterBundle(E->Scalars);
+      std::vector<Value *> OpVecs;
+      for (int j = 0, e = CI->getNumArgOperands(); j < e; ++j) {
+        ValueList OpVL;
+        for (int i = 0, e = E->Scalars.size(); i < e; ++i) {
+          CallInst *CEI = cast<CallInst>(E->Scalars[i]);
+          OpVL.push_back(CEI->getArgOperand(j));
+        }
+
+        Value *OpVec = vectorizeTree(OpVL);
+        DEBUG(dbgs() << "SLP: OpVec[" << j << "]: " << *OpVec << "\n");
+        OpVecs.push_back(OpVec);
+      }
+
+      Module *M = F->getParent();
+      IntrinsicInst *II = cast<IntrinsicInst>(CI);
+      Intrinsic::ID ID = II->getIntrinsicID();
+      Type *Tys[] = { VectorType::get(CI->getType(), E->Scalars.size()) };
+      Function *CF = Intrinsic::getDeclaration(M, ID, Tys);
+      Value *V = Builder.CreateCall(CF, OpVecs);
+      E->VectorizedValue = V;
+      return V;
+    }
     default:
     llvm_unreachable("unknown inst");
   }
diff --git a/test/Transforms/SLPVectorizer/X86/intrinsic.ll b/test/Transforms/SLPVectorizer/X86/intrinsic.ll
new file mode 100644
index 00000000000..2b7ee754df5
--- /dev/null
+++ b/test/Transforms/SLPVectorizer/X86/intrinsic.ll
@@ -0,0 +1,75 @@
+; RUN: opt < %s -basicaa -slp-vectorizer -slp-threshold=-999 -dce -S -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.8.0"
+
+declare double @llvm.fabs.f64(double) nounwind readnone
+
+;CHECK-LABEL: @vec_fabs_f64(
+;CHECK: load <2 x double>
+;CHECK: load <2 x double>
+;CHECK: call <2 x double> @llvm.fabs.v2f64
+;CHECK: store <2 x double>
+;CHECK: ret
+define void @vec_fabs_f64(double* %a, double* %b, double* %c) {
+entry:
+  %i0 = load double* %a, align 8
+  %i1 = load double* %b, align 8
+  %mul = fmul double %i0, %i1
+  %call = tail call double @llvm.fabs.f64(double %mul) nounwind readnone
+  %arrayidx3 = getelementptr inbounds double* %a, i64 1
+  %i3 = load double* %arrayidx3, align 8
+  %arrayidx4 = getelementptr inbounds double* %b, i64 1
+  %i4 = load double* %arrayidx4, align 8
+  %mul5 = fmul double %i3, %i4
+  %call5 = tail call double @llvm.fabs.f64(double %mul5) nounwind readnone
+  store double %call, double* %c, align 8
+  %arrayidx5 = getelementptr inbounds double* %c, i64 1
+  store double %call5, double* %arrayidx5, align 8
+  ret void
+}
+
+declare float @llvm.copysign.f32(float, float) nounwind readnone
+
+;CHECK-LABEL: @vec_copysign_f32(
+;CHECK: load <4 x float>
+;CHECK: load <4 x float>
+;CHECK: call <4 x float> @llvm.copysign.v4f32
+;CHECK: store <4 x float>
+;CHECK: ret
+define void @vec_copysign_f32(float* %a, float* %b, float* noalias %c) {
+entry:
+  %0 = load float* %a, align 4
+  %1 = load float* %b, align 4
+  %call0 = tail call float @llvm.copysign.f32(float %0, float %1) nounwind readnone
+  store float %call0, float* %c, align 4
+
+  %ix2 = getelementptr inbounds float* %a, i64 1
+  %2 = load float* %ix2, align 4
+  %ix3 = getelementptr inbounds float* %b, i64 1
+  %3 = load float* %ix3, align 4
+  %call1 = tail call float @llvm.copysign.f32(float %2, float %3) nounwind readnone
+  %c1 = getelementptr inbounds float* %c, i64 1
+  store float %call1, float* %c1, align 4
+
+  %ix4 = getelementptr inbounds float* %a, i64 2
+  %4 = load float* %ix4, align 4
+  %ix5 = getelementptr inbounds float* %b, i64 2
+  %5 = load float* %ix5, align 4
+  %call2 = tail call float @llvm.copysign.f32(float %4, float %5) nounwind readnone
+  %c2 = getelementptr inbounds float* %c, i64 2
+  store float %call2, float* %c2, align 4
+
+  %ix6 = getelementptr inbounds float* %a, i64 3
+  %6 = load float* %ix6, align 4
+  %ix7 = getelementptr inbounds float* %b, i64 3
+  %7 = load float* %ix7, align 4
+  %call3 = tail call float @llvm.copysign.f32(float %6, float %7) nounwind readnone
+  %c3 = getelementptr inbounds float* %c, i64 3
+  store float %call3, float* %c3, align 4
+
+  ret void
+}
+
+
+