diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -8637,16 +8637,94 @@
 
 bool SLPVectorizerPass::vectorizeStoreChains(BoUpSLP &R) {
   bool Changed = false;
+  // Sort by type, base pointers and values operand. Value operands must be
+  // compatible (have the same opcode, same parent), otherwise it is
+  // definitely not profitable to try to vectorize them.
+  auto &&StoreSorter = [](StoreInst *V, StoreInst *V2) {
+    if (V->getPointerOperandType() < V2->getPointerOperandType())
+      return true;
+    if (V->getPointerOperandType() > V2->getPointerOperandType())
+      return false;
+    // UndefValues are compatible with all other values.
+    if (isa<UndefValue>(V->getValueOperand()) ||
+        isa<UndefValue>(V2->getValueOperand()))
+      return false;
+    if (auto *I1 = dyn_cast<Instruction>(V->getValueOperand()))
+      if (auto *I2 = dyn_cast<Instruction>(V2->getValueOperand())) {
+        if (I1->getParent() < I2->getParent())
+          return true;
+        if (I1->getParent() > I2->getParent())
+          return false;
+        InstructionsState S = getSameOpcode({I1, I2});
+        if (S.getOpcode())
+          return false;
+        return I1->getOpcode() < I2->getOpcode();
+      }
+    if (isa<Constant>(V->getValueOperand()) &&
+        isa<Constant>(V2->getValueOperand()))
+      return false;
+    return V->getValueOperand()->getValueID() <
+           V2->getValueOperand()->getValueID();
+  };
+
+  auto &&AreCompatibleStores = [](StoreInst *V1, StoreInst *V2) {
+    if (V1 == V2)
+      return true;
+    if (V1->getPointerOperandType() != V2->getPointerOperandType())
+      return false;
+    // Undefs are compatible with any other value.
+    if (isa<UndefValue>(V1->getValueOperand()) ||
+        isa<UndefValue>(V2->getValueOperand()))
+      return true;
+    if (auto *I1 = dyn_cast<Instruction>(V1->getValueOperand()))
+      if (auto *I2 = dyn_cast<Instruction>(V2->getValueOperand())) {
+        if (I1->getParent() != I2->getParent())
+          return false;
+        InstructionsState S = getSameOpcode({I1, I2});
+        return S.getOpcode() > 0;
+      }
+    if (isa<Constant>(V1->getValueOperand()) &&
+        isa<Constant>(V2->getValueOperand()))
+      return true;
+    return V1->getValueOperand()->getValueID() ==
+           V2->getValueOperand()->getValueID();
+  };
+
   // Attempt to sort and vectorize each of the store-groups.
-  for (StoreListMap::iterator it = Stores.begin(), e = Stores.end(); it != e;
-       ++it) {
-    if (it->second.size() < 2)
+  for (auto &Pair : Stores) {
+    if (Pair.second.size() < 2)
       continue;
 
     LLVM_DEBUG(dbgs() << "SLP: Analyzing a store chain of length "
-                      << it->second.size() << ".\n");
+                      << Pair.second.size() << ".\n");
+
+    stable_sort(Pair.second, StoreSorter);
+
+    // Try to vectorize elements based on their compatibility.
+    for (ArrayRef<StoreInst *>::iterator IncIt = Pair.second.begin(),
+                                         E = Pair.second.end();
+         IncIt != E;) {
+
+      // Look for the next elements with the same type.
+      ArrayRef<StoreInst *>::iterator SameTypeIt = IncIt;
+      Type *EltTy = (*IncIt)->getPointerOperand()->getType();
+
+      while (SameTypeIt != E && AreCompatibleStores(*SameTypeIt, *IncIt))
+        ++SameTypeIt;
+
+      // Try to vectorize them.
+      unsigned NumElts = (SameTypeIt - IncIt);
+      LLVM_DEBUG(dbgs() << "SLP: Trying to vectorize starting at stores ("
+                        << NumElts << ")\n");
+      if (NumElts > 1 && !EltTy->getPointerElementType()->isVectorTy() &&
+          vectorizeStores(makeArrayRef(IncIt, NumElts), R)) {
+        // Success start over because instructions might have been changed.
+        Changed = true;
+      }
 
-    Changed |= vectorizeStores(it->second, R);
+      // Start over at the next instruction of a different type (or the end).
+      IncIt = SameTypeIt;
+    }
   }
   return Changed;
 }
diff --git a/llvm/test/Transforms/SLPVectorizer/X86/stores-non-ordered.ll b/llvm/test/Transforms/SLPVectorizer/X86/stores-non-ordered.ll
--- a/llvm/test/Transforms/SLPVectorizer/X86/stores-non-ordered.ll
+++ b/llvm/test/Transforms/SLPVectorizer/X86/stores-non-ordered.ll
@@ -4,24 +4,23 @@
 define i32 @non-ordered-stores(i32* noalias nocapture %in, i32* noalias nocapture %inn, i32* noalias nocapture %out) {
 ; CHECK-LABEL: @non-ordered-stores(
 ; CHECK-NEXT:    [[IN_ADDR:%.*]] = getelementptr inbounds i32, i32* [[IN:%.*]], i64 0
-; CHECK-NEXT:    [[LOAD_1:%.*]] = load i32, i32* [[IN_ADDR]], align 4
 ; CHECK-NEXT:    [[GEP_2:%.*]] = getelementptr inbounds i32, i32* [[IN_ADDR]], i64 2
-; CHECK-NEXT:    [[LOAD_3:%.*]] = load i32, i32* [[GEP_2]], align 4
 ; CHECK-NEXT:    [[TMP1:%.*]] = insertelement <2 x i32*> poison, i32* [[IN_ADDR]], i32 0
-; CHECK-NEXT:    [[TMP2:%.*]] = insertelement <2 x i32*> [[TMP1]], i32* [[IN_ADDR]], i32 1
-; CHECK-NEXT:    [[TMP3:%.*]] = getelementptr i32, <2 x i32*> [[TMP2]], <2 x i64> <i64 1, i64 3>
-; CHECK-NEXT:    [[TMP4:%.*]] = call <2 x i32> @llvm.masked.gather.v2i32.v2p0i32(<2 x i32*> [[TMP3]], i32 4, <2 x i1> <i1 true, i1 true>, <2 x i32> undef)
+; CHECK-NEXT:    [[TMP2:%.*]] = insertelement <2 x i32*> [[TMP1]], i32* [[GEP_2]], i32 1
+; CHECK-NEXT:    [[TMP3:%.*]] = call <2 x i32> @llvm.masked.gather.v2i32.v2p0i32(<2 x i32*> [[TMP2]], i32 4, <2 x i1> <i1 true, i1 true>, <2 x i32> undef)
+; CHECK-NEXT:    [[TMP4:%.*]] = insertelement <2 x i32*> [[TMP1]], i32* [[IN_ADDR]], i32 1
+; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr i32, <2 x i32*> [[TMP4]], <2 x i64> <i64 1, i64 3>
+; CHECK-NEXT:    [[TMP6:%.*]] = call <2 x i32> @llvm.masked.gather.v2i32.v2p0i32(<2 x i32*> [[TMP5]], i32 4, <2 x i1> <i1 true, i1 true>, <2 x i32> undef)
 ; CHECK-NEXT:    [[INN_ADDR:%.*]] = getelementptr inbounds i32, i32* [[INN:%.*]], i64 0
-; CHECK-NEXT:    [[LOAD_5:%.*]] = load i32, i32* [[INN_ADDR]], align 4
 ; CHECK-NEXT:    [[GEP_5:%.*]] = getelementptr inbounds i32, i32* [[INN_ADDR]], i64 2
-; CHECK-NEXT:    [[LOAD_7:%.*]] = load i32, i32* [[GEP_5]], align 4
-; CHECK-NEXT:    [[TMP5:%.*]] = insertelement <2 x i32*> poison, i32* [[INN_ADDR]], i32 0
-; CHECK-NEXT:    [[TMP6:%.*]] = insertelement <2 x i32*> [[TMP5]], i32* [[INN_ADDR]], i32 1
-; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr i32, <2 x i32*> [[TMP6]], <2 x i64> <i64 1, i64 3>
-; CHECK-NEXT:    [[TMP8:%.*]] = call <2 x i32> @llvm.masked.gather.v2i32.v2p0i32(<2 x i32*> [[TMP7]], i32 4, <2 x i1> <i1 true, i1 true>, <2 x i32> undef)
-; CHECK-NEXT:    [[MUL_1:%.*]] = mul i32 [[LOAD_1]], [[LOAD_5]]
-; CHECK-NEXT:    [[MUL_3:%.*]] = mul i32 [[LOAD_3]], [[LOAD_7]]
-; CHECK-NEXT:    [[TMP9:%.*]] = mul <2 x i32> [[TMP4]], [[TMP8]]
+; CHECK-NEXT:    [[TMP7:%.*]] = insertelement <2 x i32*> poison, i32* [[INN_ADDR]], i32 0
+; CHECK-NEXT:    [[TMP8:%.*]] = insertelement <2 x i32*> [[TMP7]], i32* [[GEP_5]], i32 1
+; CHECK-NEXT:    [[TMP9:%.*]] = call <2 x i32> @llvm.masked.gather.v2i32.v2p0i32(<2 x i32*> [[TMP8]], i32 4, <2 x i1> <i1 true, i1 true>, <2 x i32> undef)
+; CHECK-NEXT:    [[TMP10:%.*]] = insertelement <2 x i32*> [[TMP7]], i32* [[INN_ADDR]], i32 1
+; CHECK-NEXT:    [[TMP11:%.*]] = getelementptr i32, <2 x i32*> [[TMP10]], <2 x i64> <i64 1, i64 3>
+; CHECK-NEXT:    [[TMP12:%.*]] = call <2 x i32> @llvm.masked.gather.v2i32.v2p0i32(<2 x i32*> [[TMP11]], i32 4, <2 x i1> <i1 true, i1 true>, <2 x i32> undef)
+; CHECK-NEXT:    [[TMP13:%.*]] = mul <2 x i32> [[TMP3]], [[TMP9]]
+; CHECK-NEXT:    [[TMP14:%.*]] = mul <2 x i32> [[TMP6]], [[TMP12]]
 ; CHECK-NEXT:    br label [[BLOCK1:%.*]]
 ; CHECK:       block1:
 ; CHECK-NEXT:    [[GEP_X:%.*]] = getelementptr inbounds i32, i32* [[INN_ADDR]], i64 5
@@ -33,11 +32,11 @@
 ; CHECK-NEXT:    [[GEP_9:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 2
 ; CHECK-NEXT:    [[GEP_10:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 3
 ; CHECK-NEXT:    [[GEP_11:%.*]] = getelementptr inbounds i32, i32* [[OUT]], i64 4
-; CHECK-NEXT:    store i32 [[MUL_1]], i32* [[GEP_10]], align 4
 ; CHECK-NEXT:    store i32 [[LOAD_9]], i32* [[GEP_9]], align 4
-; CHECK-NEXT:    store i32 [[MUL_3]], i32* [[GEP_11]], align 4
-; CHECK-NEXT:    [[TMP10:%.*]] = bitcast i32* [[GEP_7]] to <2 x i32>*
-; CHECK-NEXT:    store <2 x i32> [[TMP9]], <2 x i32>* [[TMP10]], align 4
+; CHECK-NEXT:    [[TMP15:%.*]] = bitcast i32* [[GEP_10]] to <2 x i32>*
+; CHECK-NEXT:    store <2 x i32> [[TMP13]], <2 x i32>* [[TMP15]], align 4
+; CHECK-NEXT:    [[TMP16:%.*]] = bitcast i32* [[GEP_7]] to <2 x i32>*
+; CHECK-NEXT:    store <2 x i32> [[TMP14]], <2 x i32>* [[TMP16]], align 4
 ; CHECK-NEXT:    ret i32 undef
 ;
   %in.addr = getelementptr inbounds i32, i32* %in, i64 0