Index: lib/Target/AMDGPU/R600ISelLowering.cpp
===================================================================
--- lib/Target/AMDGPU/R600ISelLowering.cpp
+++ lib/Target/AMDGPU/R600ISelLowering.cpp
@@ -1677,7 +1677,7 @@
   if (VT.isVector()) {
     unsigned NumElemVT = VT.getVectorNumElements();
     EVT ElemVT = VT.getVectorElementType();
-    SDValue Loads[4];
+    SmallVector<SDValue, 4> Loads(NumElemVT);
 
     assert(NumElemVT >= StackWidth && "Stack width cannot be greater than "
                                       "vector width in load");
@@ -1692,10 +1692,7 @@
                              DAG.getTargetConstant(Channel, DL, MVT::i32),
                              Op.getOperand(2));
     }
-    for (unsigned i = NumElemVT; i < 4; ++i) {
-      Loads[i] = DAG.getUNDEF(ElemVT);
-    }
-    EVT TargetVT = EVT::getVectorVT(*DAG.getContext(), ElemVT, 4);
+    EVT TargetVT = EVT::getVectorVT(*DAG.getContext(), ElemVT, NumElemVT);
     LoweredLoad = DAG.getBuildVector(TargetVT, DL, Loads);
   } else {
     LoweredLoad = DAG.getNode(AMDGPUISD::REGISTER_LOAD, DL, VT,
Index: test/CodeGen/AMDGPU/amdgpu.private-memory.ll
===================================================================
--- test/CodeGen/AMDGPU/amdgpu.private-memory.ll
+++ test/CodeGen/AMDGPU/amdgpu.private-memory.ll
@@ -401,3 +401,108 @@
 ; HSAOPT: !1 = !{i32 0, i32 2048}
 
 ; NOHSAOPT: !0 = !{i32 0, i32 2048}
+
+
+; FUNC-LABEL: v16i32_stack:
+
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+
+define void @v16i32_stack(<16 x i32> addrspace(1)* %out, i32 %a) {
+  %alloca = alloca [2 x <16 x i32>]
+  %tmp0 = getelementptr [2 x <16 x i32>], [2 x <16 x i32>]* %alloca, i32 0, i32 %a
+  %tmp5 = load <16 x i32>, <16 x i32>* %tmp0
+  store <16 x i32> %tmp5, <16 x i32> addrspace(1)* %out
+  ret void
+}
+
+; FUNC-LABEL: v16float_stack:
+
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+; R600: MOVA_INT
+
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+
+define void @v16float_stack(<16 x float> addrspace(1)* %out, i32 %a) {
+  %alloca = alloca [2 x <16 x float>]
+  %tmp0 = getelementptr [2 x <16 x float>], [2 x <16 x float>]* %alloca, i32 0, i32 %a
+  %tmp5 = load <16 x float>, <16 x float>* %tmp0
+  store <16 x float> %tmp5, <16 x float> addrspace(1)* %out
+  ret void
+}
+
+; FUNC-LABEL: v2float_stack:
+
+; R600: MOVA_INT
+; R600: MOVA_INT
+
+; SI: buffer_load_dword
+; SI: buffer_load_dword
+
+define void @v2float_stack(<2 x float> addrspace(1)* %out, i32 %a) {
+  %alloca = alloca [16 x <2 x float>]
+  %tmp0 = getelementptr [16 x <2 x float>], [16 x <2 x float>]* %alloca, i32 0, i32 %a
+  %tmp5 = load <2 x float>, <2 x float>* %tmp0
+  store <2 x float> %tmp5, <2 x float> addrspace(1)* %out
+  ret void
+}