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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s3 4@val = internal global i64 05@"\01LC" = internal constant [7 x i8] c"0x%lx\0A\00"6 7define i32 @main() nounwind {8; CHECK-LABEL: main:9; CHECK: ## %bb.0: ## %entry10; CHECK-NEXT: pushq %rax11; CHECK-NEXT: movl $1, %ecx12; CHECK-NEXT: xorl %eax, %eax13; CHECK-NEXT: lock cmpxchgq %rcx, _val(%rip)14; CHECK-NEXT: leaq LC(%rip), %rdi15; CHECK-NEXT: movq %rax, %rsi16; CHECK-NEXT: xorl %eax, %eax17; CHECK-NEXT: callq _printf18; CHECK-NEXT: xorl %eax, %eax19; CHECK-NEXT: popq %rcx20; CHECK-NEXT: retq21entry:22 %t0 = cmpxchg ptr @val, i64 0, i64 1 monotonic monotonic23 %0 = extractvalue { i64, i1 } %t0, 024 %1 = tail call i32 (ptr, ...) @printf(ptr @"\01LC", i64 %0) nounwind25 ret i32 026}27 28declare i32 @printf(ptr, ...) nounwind29