diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h
index 3f8607e6f99..5ec49a8928c 100644
--- a/include/llvm/Target/TargetLowering.h
+++ b/include/llvm/Target/TargetLowering.h
@@ -415,7 +415,8 @@ public:
   virtual bool mergeStoresAfterLegalization() const { return false; }
 
   /// Returns if it's reasonable to merge stores to MemVT size.
-  virtual bool canMergeStoresTo(unsigned AddressSpace, EVT MemVT) const {
+  virtual bool canMergeStoresTo(unsigned AS, EVT MemVT,
+                                const SelectionDAG &DAG) const {
     return true;
   }
 
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 70ce2fcd33c..33a806d8eed 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -12712,7 +12712,7 @@ bool DAGCombiner::MergeConsecutiveStores(StoreSDNode *St) {
         EVT StoreTy = EVT::getIntegerVT(Context, SizeInBits);
         bool IsFast = false;
         if (TLI.isTypeLegal(StoreTy) &&
-            TLI.canMergeStoresTo(FirstStoreAS, StoreTy) &&
+            TLI.canMergeStoresTo(FirstStoreAS, StoreTy, DAG) &&
             TLI.allowsMemoryAccess(Context, DL, StoreTy, FirstStoreAS,
                                    FirstStoreAlign, &IsFast) &&
             IsFast) {
@@ -12724,7 +12724,7 @@ bool DAGCombiner::MergeConsecutiveStores(StoreSDNode *St) {
           EVT LegalizedStoredValueTy =
               TLI.getTypeToTransformTo(Context, StoredVal.getValueType());
           if (TLI.isTruncStoreLegal(LegalizedStoredValueTy, StoreTy) &&
-              TLI.canMergeStoresTo(FirstStoreAS, LegalizedStoredValueTy) &&
+              TLI.canMergeStoresTo(FirstStoreAS, LegalizedStoredValueTy, DAG) &&
               TLI.allowsMemoryAccess(Context, DL, LegalizedStoredValueTy,
                                      FirstStoreAS, FirstStoreAlign, &IsFast) &&
               IsFast) {
@@ -12741,7 +12741,8 @@ bool DAGCombiner::MergeConsecutiveStores(StoreSDNode *St) {
             !NoVectors) {
           // Find a legal type for the vector store.
           EVT Ty = EVT::getVectorVT(Context, MemVT, i + 1);
-          if (TLI.isTypeLegal(Ty) && TLI.canMergeStoresTo(FirstStoreAS, Ty) &&
+          if (TLI.isTypeLegal(Ty) &&
+              TLI.canMergeStoresTo(FirstStoreAS, Ty, DAG) &&
               TLI.allowsMemoryAccess(Context, DL, Ty, FirstStoreAS,
                                      FirstStoreAlign, &IsFast) &&
               IsFast)
@@ -12799,7 +12800,8 @@ bool DAGCombiner::MergeConsecutiveStores(StoreSDNode *St) {
         EVT Ty =
             EVT::getVectorVT(*DAG.getContext(), MemVT.getScalarType(), Elts);
         bool IsFast;
-        if (TLI.isTypeLegal(Ty) && TLI.canMergeStoresTo(FirstStoreAS, Ty) &&
+        if (TLI.isTypeLegal(Ty) &&
+            TLI.canMergeStoresTo(FirstStoreAS, Ty, DAG) &&
             TLI.allowsMemoryAccess(Context, DL, Ty, FirstStoreAS,
                                    FirstStoreAlign, &IsFast) &&
             IsFast)
@@ -12916,7 +12918,7 @@ bool DAGCombiner::MergeConsecutiveStores(StoreSDNode *St) {
       EVT StoreTy = EVT::getVectorVT(Context, MemVT, i + 1);
       bool IsFastSt, IsFastLd;
       if (TLI.isTypeLegal(StoreTy) &&
-          TLI.canMergeStoresTo(FirstStoreAS, StoreTy) &&
+          TLI.canMergeStoresTo(FirstStoreAS, StoreTy, DAG) &&
           TLI.allowsMemoryAccess(Context, DL, StoreTy, FirstStoreAS,
                                  FirstStoreAlign, &IsFastSt) &&
           IsFastSt &&
@@ -12930,7 +12932,7 @@ bool DAGCombiner::MergeConsecutiveStores(StoreSDNode *St) {
       unsigned SizeInBits = (i + 1) * ElementSizeBytes * 8;
       StoreTy = EVT::getIntegerVT(Context, SizeInBits);
       if (TLI.isTypeLegal(StoreTy) &&
-          TLI.canMergeStoresTo(FirstStoreAS, StoreTy) &&
+          TLI.canMergeStoresTo(FirstStoreAS, StoreTy, DAG) &&
           TLI.allowsMemoryAccess(Context, DL, StoreTy, FirstStoreAS,
                                  FirstStoreAlign, &IsFastSt) &&
           IsFastSt &&
@@ -12944,7 +12946,7 @@ bool DAGCombiner::MergeConsecutiveStores(StoreSDNode *St) {
                  TargetLowering::TypePromoteInteger) {
         EVT LegalizedStoredValueTy = TLI.getTypeToTransformTo(Context, StoreTy);
         if (TLI.isTruncStoreLegal(LegalizedStoredValueTy, StoreTy) &&
-            TLI.canMergeStoresTo(FirstStoreAS, LegalizedStoredValueTy) &&
+            TLI.canMergeStoresTo(FirstStoreAS, LegalizedStoredValueTy, DAG) &&
             TLI.isLoadExtLegal(ISD::ZEXTLOAD, LegalizedStoredValueTy,
                                StoreTy) &&
             TLI.isLoadExtLegal(ISD::SEXTLOAD, LegalizedStoredValueTy,
diff --git a/lib/Target/AMDGPU/R600ISelLowering.cpp b/lib/Target/AMDGPU/R600ISelLowering.cpp
index 215791f4f92..69a63b6941e 100644
--- a/lib/Target/AMDGPU/R600ISelLowering.cpp
+++ b/lib/Target/AMDGPU/R600ISelLowering.cpp
@@ -1618,7 +1618,8 @@ EVT R600TargetLowering::getSetCCResultType(const DataLayout &DL, LLVMContext &,
    return VT.changeVectorElementTypeToInteger();
 }
 
-bool R600TargetLowering::canMergeStoresTo(unsigned AS, EVT MemVT) const {
+bool R600TargetLowering::canMergeStoresTo(unsigned AS, EVT MemVT,
+                                          const SelectionDAG &DAG) const {
   // Local and Private addresses do not handle vectors. Limit to i32
   if ((AS == AMDGPUASI.LOCAL_ADDRESS || AS == AMDGPUASI.PRIVATE_ADDRESS)) {
     return (MemVT.getSizeInBits() <= 32);
diff --git a/lib/Target/AMDGPU/R600ISelLowering.h b/lib/Target/AMDGPU/R600ISelLowering.h
index d6a0876a6ee..2a774693f02 100644
--- a/lib/Target/AMDGPU/R600ISelLowering.h
+++ b/lib/Target/AMDGPU/R600ISelLowering.h
@@ -44,7 +44,8 @@ public:
   EVT getSetCCResultType(const DataLayout &DL, LLVMContext &,
                          EVT VT) const override;
 
-  bool canMergeStoresTo(unsigned AS, EVT MemVT) const override;
+  bool canMergeStoresTo(unsigned AS, EVT MemVT,
+                        const SelectionDAG &DAG) const override;
 
   bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AS,
                                       unsigned Align,
diff --git a/lib/Target/AMDGPU/SIISelLowering.cpp b/lib/Target/AMDGPU/SIISelLowering.cpp
index c42a8169d58..aaa9547fef0 100644
--- a/lib/Target/AMDGPU/SIISelLowering.cpp
+++ b/lib/Target/AMDGPU/SIISelLowering.cpp
@@ -713,7 +713,8 @@ bool SITargetLowering::isLegalAddressingMode(const DataLayout &DL,
   }
 }
 
-bool SITargetLowering::canMergeStoresTo(unsigned AS, EVT MemVT) const {
+bool SITargetLowering::canMergeStoresTo(unsigned AS, EVT MemVT,
+                                        const SelectionDAG &DAG) const {
   if (AS == AMDGPUASI.GLOBAL_ADDRESS || AS == AMDGPUASI.FLAT_ADDRESS) {
     return (MemVT.getSizeInBits() <= 4 * 32);
   } else if (AS == AMDGPUASI.PRIVATE_ADDRESS) {
diff --git a/lib/Target/AMDGPU/SIISelLowering.h b/lib/Target/AMDGPU/SIISelLowering.h
index 24f88e632d3..83392a7ab1b 100644
--- a/lib/Target/AMDGPU/SIISelLowering.h
+++ b/lib/Target/AMDGPU/SIISelLowering.h
@@ -153,7 +153,8 @@ public:
   bool isLegalAddressingMode(const DataLayout &DL, const AddrMode &AM, Type *Ty,
                              unsigned AS) const override;
 
-  bool canMergeStoresTo(unsigned AS, EVT MemVT) const override;
+  bool canMergeStoresTo(unsigned AS, EVT MemVT,
+                        const SelectionDAG &DAG) const override;
 
   bool allowsMisalignedMemoryAccesses(EVT VT, unsigned AS,
                                       unsigned Align,
diff --git a/lib/Target/ARM/ARMISelLowering.h b/lib/Target/ARM/ARMISelLowering.h
index 5044134f5b1..f05b1425523 100644
--- a/lib/Target/ARM/ARMISelLowering.h
+++ b/lib/Target/ARM/ARMISelLowering.h
@@ -510,7 +510,8 @@ class InstrItineraryData;
     bool canCombineStoreAndExtract(Type *VectorTy, Value *Idx,
                                    unsigned &Cost) const override;
 
-    bool canMergeStoresTo(unsigned AddressSpace, EVT MemVT) const override {
+    bool canMergeStoresTo(unsigned AddressSpace, EVT MemVT,
+                          const SelectionDAG &DAG) const override {
       // Do not merge to larger than i32.
       return (MemVT.getSizeInBits() <= 32);
     }