Fix NVPTX/call-with-alloca-buffer.ll after r276777.

r276777 makes InstSimplify stronger, letting it see through some
unnecessary addrspace casts.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@276786 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed