; 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
@.str.2 = external hidden unnamed_addr constant [10 x i8], align 1
@cq = external dso_local global [10 x i32], align 16

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

; Function Attrs: nounwind uwtable
define dso_local void @add(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr @rear, align 4, !tbaa !5
  %4 = icmp eq i32 %3, 9
  br i1 %4, label %5, label %10

5:                                                ; preds = %1
  %6 = load i32, ptr @front, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %8, label %10

8:                                                ; preds = %5
  %9 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %23

10:                                               ; preds = %5, %1
  %11 = load i32, ptr @rear, align 4, !tbaa !5
  %12 = icmp eq i32 %11, -1
  br i1 %12, label %13, label %14

13:                                               ; preds = %10
  store i32 0, ptr @rear, align 4, !tbaa !5
  store i32 0, ptr @front, align 4, !tbaa !5
  br label %22

14:                                               ; preds = %10
  %15 = load i32, ptr @rear, align 4, !tbaa !5
  %16 = icmp eq i32 %15, 9
  br i1 %16, label %17, label %18

17:                                               ; preds = %14
  store i32 0, ptr @rear, align 4, !tbaa !5
  br label %21

18:                                               ; preds = %14
  %19 = load i32, ptr @rear, align 4, !tbaa !5
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr @rear, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %18, %17
  br label %22

22:                                               ; preds = %21, %13
  br label %23

23:                                               ; preds = %22, %8
  %24 = load i32, ptr %2, align 4, !tbaa !5
  %25 = load i32, ptr @rear, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [10 x i32], ptr @cq, i64 0, i64 %26
  store i32 %24, ptr %27, align 4, !tbaa !5
  ret void
}

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" }

!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
@.str.2 = external hidden unnamed_addr constant [10 x i8], align 1
@cq = external dso_local local_unnamed_addr global [10 x i32], align 16

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

; Function Attrs: nofree nounwind uwtable
define dso_local void @add(i32 noundef %0) local_unnamed_addr #1 {
  %2 = load i32, ptr @rear, align 4, !tbaa !5
  %3 = icmp eq i32 %2, 9
  %4 = load i32, ptr @front, align 4
  %5 = icmp eq i32 %4, 0
  %or.cond = select i1 %3, i1 %5, i1 false
  br i1 %or.cond, label %6, label %8

6:                                                ; preds = %1
  %7 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %.pre = load i32, ptr @rear, align 4, !tbaa !5
  br label %15

8:                                                ; preds = %1
  %9 = icmp eq i32 %2, -1
  br i1 %9, label %10, label %11

10:                                               ; preds = %8
  store i32 0, ptr @rear, align 4, !tbaa !5
  store i32 0, ptr @front, align 4, !tbaa !5
  br label %15

11:                                               ; preds = %8
  br i1 %3, label %12, label %13

12:                                               ; preds = %11
  store i32 0, ptr @rear, align 4, !tbaa !5
  br label %15

13:                                               ; preds = %11
  %14 = add nuw nsw i32 %2, 1
  store i32 %14, ptr @rear, align 4, !tbaa !5
  br label %15

15:                                               ; preds = %10, %13, %12, %6
  %16 = phi i32 [ 0, %10 ], [ %14, %13 ], [ 0, %12 ], [ %.pre, %6 ]
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [10 x i32], ptr @cq, i64 0, i64 %17
  store i32 %0, ptr %18, align 4, !tbaa !5
  ret void
}

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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass