1; RUN: llc < %s -mtriple=x86_64-apple-darwin | grep xor | count 3 2 3@val = internal global i64 0 4@"\01LC" = internal constant [7 x i8] c"0x%lx\0A\00" 5 6define i32 @main() nounwind { 7entry: 8 %t0 = cmpxchg i64* @val, i64 0, i64 1 monotonic monotonic 9 %0 = extractvalue { i64, i1 } %t0, 0 10 %1 = tail call i32 (i8*, ...) @printf(i8* getelementptr ([7 x i8], [7 x i8]* @"\01LC", i32 0, i64 0), i64 %0) nounwind 11 ret i32 0 12} 13 14declare i32 @printf(i8*, ...) nounwind 15