; LLVM IR from sslab-gatech/janus :: lkl/tools/build/feature (test-sync-compare-and-swap)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@x = external dso_local global i64, align 8

; Function Attrs: nounwind uwtable
define dso_local i32 @main(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  store i64 %9, ptr %7, align 8, !tbaa !11
  %10 = load ptr, ptr %5, align 8, !tbaa !9
  store ptr %10, ptr %5, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %14, %2
  %12 = cmpxchg ptr @x, i64 0, i64 0 seq_cst seq_cst, align 8
  %13 = extractvalue { i64, i1 } %12, 0
  store i64 %13, ptr %6, align 8, !tbaa !11
  br label %14

14:                                               ; preds = %11
  %15 = load i64, ptr %6, align 8, !tbaa !11
  %16 = load i64, ptr %7, align 8, !tbaa !11
  %17 = cmpxchg ptr @x, i64 %15, i64 %16 seq_cst seq_cst, align 8
  %18 = extractvalue { i64, i1 } %17, 1
  %19 = xor i1 %18, true
  br i1 %19, label %11, label %20, !llvm.loop !13

20:                                               ; preds = %14
  %21 = load i64, ptr %6, align 8, !tbaa !11
  %22 = load i64, ptr %7, align 8, !tbaa !11
  %23 = icmp eq i64 %21, %22
  %24 = zext i1 %23 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  ret i32 %24
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@x = external dso_local global i64, align 8

; Function Attrs: nofree norecurse nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local range(i32 0, 2) i32 @main(i32 noundef %0, ptr nocapture noundef readnone %1) local_unnamed_addr #0 {
  %3 = sext i32 %0 to i64
  br label %4

4:                                                ; preds = %4, %2
  %5 = cmpxchg ptr @x, i64 0, i64 0 seq_cst seq_cst, align 8
  %6 = extractvalue { i64, i1 } %5, 0
  %7 = cmpxchg ptr @x, i64 %6, i64 %3 seq_cst seq_cst, align 8
  %8 = extractvalue { i64, i1 } %7, 1
  br i1 %8, label %9, label %4, !llvm.loop !5

9:                                                ; preds = %4
  %10 = icmp eq i64 %6, %3
  %11 = zext i1 %10 to i32
  ret i32 %11
}

attributes #0 = { nofree norecurse nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass