; LLVM IR from xuxping/codelife :: algorthms/greedy (8queue)

; 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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

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

6:                                                ; preds = %33, %1
  %7 = load i32, ptr %3, align 4, !tbaa !9
  %8 = icmp slt i32 %7, 8
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  store i32 2, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %36

10:                                               ; preds = %6
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %28, %10
  %12 = load i32, ptr %5, align 4, !tbaa !9
  %13 = icmp slt i32 %12, 8
  br i1 %13, label %15, label %14

14:                                               ; preds = %11
  store i32 5, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %31

15:                                               ; preds = %11
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = load i32, ptr %3, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds i32, ptr %16, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !9
  %21 = load i32, ptr %5, align 4, !tbaa !9
  %22 = icmp eq i32 %20, %21
  br i1 %22, label %23, label %25

23:                                               ; preds = %15
  %24 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  br label %27

25:                                               ; preds = %15
  %26 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  br label %27

27:                                               ; preds = %25, %23
  br label %28

28:                                               ; preds = %27
  %29 = load i32, ptr %5, align 4, !tbaa !9
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %5, align 4, !tbaa !9
  br label %11, !llvm.loop !11

31:                                               ; preds = %14
  %32 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %33

33:                                               ; preds = %31
  %34 = load i32, ptr %3, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %3, align 4, !tbaa !9
  br label %6, !llvm.loop !13

36:                                               ; preds = %9
  %37 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  ret void
}

declare i32 @printf(ptr noundef, ...) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { "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 #3 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local void @display(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  br label %.preheader

.preheader:                                       ; preds = %1, %.preheader
  %indvars.iv = phi i64 [ 0, %1 ], [ %indvars.iv.next, %.preheader ]
  %2 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = icmp eq i32 %3, 0
  %.str..str.1 = select i1 %4, ptr @.str, ptr @.str.1
  %5 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str..str.1)
  %6 = load i32, ptr %2, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 1
  %.str.sink10 = select i1 %7, ptr @.str, ptr @.str.1
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.sink10)
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = icmp eq i32 %9, 2
  %.str.sink11 = select i1 %10, ptr @.str, ptr @.str.1
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.sink11)
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = icmp eq i32 %12, 3
  %.str.sink12 = select i1 %13, ptr @.str, ptr @.str.1
  %14 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.sink12)
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = icmp eq i32 %15, 4
  %.str.sink13 = select i1 %16, ptr @.str, ptr @.str.1
  %17 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.sink13)
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = icmp eq i32 %18, 5
  %.str.sink14 = select i1 %19, ptr @.str, ptr @.str.1
  %20 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.sink14)
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = icmp eq i32 %21, 6
  %.str.sink15 = select i1 %22, ptr @.str, ptr @.str.1
  %23 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.sink15)
  %24 = load i32, ptr %2, align 4, !tbaa !5
  %25 = icmp eq i32 %24, 7
  %.str.sink16 = select i1 %25, ptr @.str, ptr @.str.1
  %26 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.sink16)
  %27 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 8
  br i1 %exitcond.not, label %28, label %.preheader, !llvm.loop !9

28:                                               ; preds = %.preheader
  %29 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  ret void
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { nofree 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 = { nofree nounwind "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 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass