1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s 3 4@val = internal global i64 0 5@"\01LC" = internal constant [7 x i8] c"0x%lx\0A\00" 6 7define i32 @main() nounwind { 8; CHECK-LABEL: main: 9; CHECK: ## %bb.0: ## %entry 10; CHECK-NEXT: pushq %rax 11; CHECK-NEXT: movl $1, %ecx 12; CHECK-NEXT: xorl %eax, %eax 13; CHECK-NEXT: lock cmpxchgq %rcx, _val(%rip) 14; CHECK-NEXT: leaq LC(%rip), %rdi 15; CHECK-NEXT: movq %rax, %rsi 16; CHECK-NEXT: xorl %eax, %eax 17; CHECK-NEXT: callq _printf 18; CHECK-NEXT: xorl %eax, %eax 19; CHECK-NEXT: popq %rcx 20; CHECK-NEXT: retq 21entry: 22 %t0 = cmpxchg ptr @val, i64 0, i64 1 monotonic monotonic 23 %0 = extractvalue { i64, i1 } %t0, 0 24 %1 = tail call i32 (ptr, ...) @printf(ptr @"\01LC", i64 %0) nounwind 25 ret i32 0 26} 27 28declare i32 @printf(ptr, ...) nounwind 29