-; RUN: llc < %s -march=x86-64 | FileCheck -check-prefix=X86-64 %s
+; RUN: llc < %s -mtriple=x86_64-linux | FileCheck -check-prefix=X86-64 %s
+; Win64 has not supported byval yet.
; RUN: llc < %s -march=x86 | FileCheck -check-prefix=X86 %s
; X86: movl 4(%esp), %eax