Add test for wrong declaration type for __safestack_unsafe_stack_ptr

Author: arsenm

llvm/test/Transforms/SafeStack/X86/alloca-addrspace-wrong-addrspace-error.ll

@@ -0,0 +1,17 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: not --crash opt -passes=safe-stack -mtriple=x86_64-pc-linux-gnu -disable-output %s 2>&1 | FileCheck %s
+
+target datalayout = "A5"
+
+; Declaration of __safestack_unsafe_stack_ptr already exists with wrong address space
+@__safestack_unsafe_stack_ptr = external thread_local(initialexec) global ptr
+
+; CHECK: LLVM ERROR: __safestack_unsafe_stack_ptr must have void* type
+
+define void @alloca_addrspace() nounwind uwtable safestack {
+  %a = alloca i8, align 8, addrspace(5)
+  call void @Capture_as5(ptr addrspace(5) %a)
+  ret void
+}
+
+declare void @Capture_as5(ptr addrspace(5))