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      1 ; RUN: llc < %s -mtriple=x86_64-linux | FileCheck -check-prefix=X86-64 %s
      2 ; Win64 has not supported byval yet.
      3 ; RUN: llc < %s -march=x86 | FileCheck -check-prefix=X86 %s
      4 
      5 ; X86: movl	4(%esp), %eax
      6 ; X86: movl	8(%esp), %edx
      7 
      8 ; X86-64: movq	8(%rsp), %rax
      9 
     10 %struct.s = type { i64, i64, i64 }
     11 
     12 define i64 @f(%struct.s* byval %a) {
     13 entry:
     14 	%tmp2 = getelementptr %struct.s* %a, i32 0, i32 0
     15 	%tmp3 = load i64* %tmp2, align 8
     16 	ret i64 %tmp3
     17 }
     18