AMDGPU: Fix wrong null value for private address space
I'm guessing this was a holdover from when 0 was an invalid stack
pointer, but surprised nobody has discovered this before.
Also don't allow offset folding for -1 pointers, since it looks weird
to partially fold this.
diff --git a/llvm/test/CodeGen/AMDGPU/nullptr.ll b/llvm/test/CodeGen/AMDGPU/nullptr.ll
index 4eaf983..16292f0 100644
--- a/llvm/test/CodeGen/AMDGPU/nullptr.ll
+++ b/llvm/test/CodeGen/AMDGPU/nullptr.ll
@@ -4,7 +4,7 @@
%struct.S = type { i32 addrspace(5)*, i32 addrspace(1)*, i32 addrspace(4)*, i32 addrspace(3)*, i32*, i32 addrspace(2)*}
; CHECK-LABEL: nullptr_priv:
-; CHECK-NEXT: .long 0
+; CHECK-NEXT: .long -1
@nullptr_priv = global i32 addrspace(5)* addrspacecast (i32* null to i32 addrspace(5)*)
; CHECK-LABEL: nullptr_glob:
@@ -98,7 +98,7 @@
@nullptr23 = global i32 addrspace(23)* addrspacecast (i32* null to i32 addrspace(23)*)
; CHECK-LABEL: structWithPointers:
-; CHECK-NEXT: .long 0
+; CHECK-NEXT: .long -1
; GCN-NEXT: .zero 4
; GCN-NEXT: .quad 0
; R600-NEXT: .long 0
