; LLVM IR from AllAlgorithms/c :: algorithms/searching (dfs_bfs)

; 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"

@front = external dso_local global i32, align 4
@rear = external dso_local global i32, align 4
@cq = external dso_local global [10 x i32], align 16
@.str.3 = external hidden unnamed_addr constant [7 x i8], align 1

declare i32 @printf(ptr noundef, ...) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @delete() #1 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  %2 = load i32, ptr @rear, align 4, !tbaa !5
  %3 = icmp eq i32 %2, -1
  br i1 %3, label %4, label %6

4:                                                ; preds = %0
  %5 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  br label %20

6:                                                ; preds = %0
  %7 = load i32, ptr @front, align 4, !tbaa !5
  %8 = icmp eq i32 %7, 9
  br i1 %8, label %9, label %10

9:                                                ; preds = %6
  store i32 0, ptr @front, align 4, !tbaa !5
  br label %19

10:                                               ; preds = %6
  %11 = load i32, ptr @front, align 4, !tbaa !5
  %12 = load i32, ptr @rear, align 4, !tbaa !5
  %13 = icmp eq i32 %11, %12
  br i1 %13, label %14, label %15

14:                                               ; preds = %10
  store i32 -1, ptr @rear, align 4, !tbaa !5
  store i32 -1, ptr @front, align 4, !tbaa !5
  br label %18

15:                                               ; preds = %10
  %16 = load i32, ptr @front, align 4, !tbaa !5
  %17 = add nsw i32 %16, 1
  store i32 %17, ptr @front, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %15, %14
  br label %19

19:                                               ; preds = %18, %9
  br label %20

20:                                               ; preds = %19, %4
  %21 = load i32, ptr @front, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [10 x i32], ptr @cq, i64 0, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret i32 %24
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #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 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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"

@front = external dso_local local_unnamed_addr global i32, align 4
@rear = external dso_local local_unnamed_addr global i32, align 4
@cq = external dso_local local_unnamed_addr global [10 x i32], align 16
@.str.3 = external hidden unnamed_addr constant [7 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: nofree nounwind uwtable
define dso_local i32 @delete() local_unnamed_addr #1 {
  %1 = load i32, ptr @rear, align 4, !tbaa !5
  %2 = icmp eq i32 %1, -1
  br i1 %2, label %3, label %5

3:                                                ; preds = %0
  %4 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  %.pre = load i32, ptr @front, align 4, !tbaa !5
  br label %14

5:                                                ; preds = %0
  %6 = load i32, ptr @front, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 9
  br i1 %7, label %8, label %9

8:                                                ; preds = %5
  store i32 0, ptr @front, align 4, !tbaa !5
  br label %14

9:                                                ; preds = %5
  %10 = icmp eq i32 %6, %1
  br i1 %10, label %11, label %12

11:                                               ; preds = %9
  store i32 -1, ptr @rear, align 4, !tbaa !5
  store i32 -1, ptr @front, align 4, !tbaa !5
  br label %14

12:                                               ; preds = %9
  %13 = add nsw i32 %6, 1
  store i32 %13, ptr @front, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %8, %12, %11, %3
  %15 = phi i32 [ 0, %8 ], [ %13, %12 ], [ -1, %11 ], [ %.pre, %3 ]
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [10 x i32], ptr @cq, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !5
  ret i32 %18
}

attributes #0 = { 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" }
attributes #1 = { 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" }

!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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass