AMDGPU: Treat 0 as private null pointer in addrspacecast lowering

llvm-svn: 297658
diff --git a/llvm/test/CodeGen/AMDGPU/nullptr.ll b/llvm/test/CodeGen/AMDGPU/nullptr.ll
index b4bdf71..0df16da 100644
--- a/llvm/test/CodeGen/AMDGPU/nullptr.ll
+++ b/llvm/test/CodeGen/AMDGPU/nullptr.ll
@@ -3,7 +3,7 @@
 %struct.S = type { i32*, i32 addrspace(1)*, i32 addrspace(2)*, i32 addrspace(3)*, i32 addrspace(4)*, i32 addrspace(5)*}
 
 ; CHECK-LABEL: nullptr_priv:
-; CHECK-NEXT: .long -1
+; CHECK-NEXT: .long 0
 @nullptr_priv = global i32* addrspacecast (i32 addrspace(4)* null to i32*)
 
 ; CHECK-LABEL: nullptr_glob:
@@ -95,7 +95,7 @@
 @nullptr23 = global i32 addrspace(23)* addrspacecast (i32 addrspace(4)* null to i32 addrspace(23)*)
 
 ; CHECK-LABEL: structWithPointers:
-; CHECK-NEXT: .long -1
+; CHECK-NEXT: .long 0
 ; CHECK-NEXT: .zero 4
 ; CHECK-NEXT: .quad 0
 ; CHECK-NEXT: .quad 0