Index: lib/CodeGen/CGCall.cpp
===================================================================
--- lib/CodeGen/CGCall.cpp
+++ lib/CodeGen/CGCall.cpp
@@ -1586,9 +1586,10 @@
 
     case ABIArgInfo::Indirect: {
       assert(NumIRArgs == 1);
-      // indirect arguments are always on the stack, which is addr space #0.
+      // indirect arguments are always on the stack, which is alloca addr space.
       llvm::Type *LTy = ConvertTypeForMem(it->type);
-      ArgTypes[FirstIRArg] = LTy->getPointerTo();
+      ArgTypes[FirstIRArg] = LTy->getPointerTo(
+          CGM.getDataLayout().getAllocaAddrSpace());
       break;
     }
 
Index: test/CodeGenOpenCL/byval.cl
===================================================================
--- /dev/null
+++ test/CodeGenOpenCL/byval.cl
@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 -emit-llvm -o - -triple amdgcn %s | FileCheck %s
+// RUN: %clang_cc1 -emit-llvm -o - -triple amdgcn---amdgizcl %s | FileCheck %s -check-prefix=AMDGIZ
+
+struct A {
+  int x[100];
+};
+
+int f(struct A a);
+
+int g() {
+  struct A a;
+  // CHECK: call i32 @f(%struct.A* byval{{.*}}%a)
+  // AMDGIZ: call i32 @f(%struct.A addrspace(5)* byval{{.*}}%a)
+  return f(a);
+}
+
+// CHECK: declare i32 @f(%struct.A* byval{{.*}})
+// AMDGIZ: declare i32 @f(%struct.A addrspace(5)* byval{{.*}})