Index: lib/Target/AMDGPU/AMDGPU.h
===================================================================
--- lib/Target/AMDGPU/AMDGPU.h
+++ lib/Target/AMDGPU/AMDGPU.h
@@ -229,7 +229,7 @@
 
   enum : unsigned {
     // The maximum value for flat, generic, local, private, constant and region.
-    MAX_COMMON_ADDRESS = 5,
+    MAX_COMMON_ADDRESS = 6,
 
     GLOBAL_ADDRESS = 1,   ///< Address space for global memory (RAT0, VTX0).
     CONSTANT_ADDRESS = 4, ///< Address space for constant memory (VTX2)
Index: lib/Target/AMDGPU/AMDGPUAliasAnalysis.cpp
===================================================================
--- lib/Target/AMDGPU/AMDGPUAliasAnalysis.cpp
+++ lib/Target/AMDGPU/AMDGPUAliasAnalysis.cpp
@@ -69,7 +69,7 @@
   /* Region   */ {MayAlias, NoAlias , NoAlias , NoAlias,  MayAlias, NoAlias},
   /* Private  */ {MayAlias, NoAlias , NoAlias , NoAlias , NoAlias , MayAlias}
   };
-  assert(AS.MAX_COMMON_ADDRESS <= 5);
+  assert(AS.MAX_COMMON_ADDRESS <= 6);
   if (AS.FLAT_ADDRESS == 0) {
     assert(AS.GLOBAL_ADDRESS   == 1 &&
            AS.REGION_ADDRESS   == 2 &&
Index: test/CodeGen/AMDGPU/amdgpu-alias-analysis.ll
===================================================================
--- test/CodeGen/AMDGPU/amdgpu-alias-analysis.ll
+++ test/CodeGen/AMDGPU/amdgpu-alias-analysis.ll
@@ -7,3 +7,9 @@
   ret void
 }
 
+; CHECK: NoAlias:      i8 addrspace(1)* %p1, i8 addrspace(6)* %p
+
+define void @test_32bit_addr_space(i8 addrspace(6)* %p, i8 addrspace(1)* %p1) {
+  ret void
+}
+