; LLVM IR from FOSS-UCSC/FOSSALGO :: data-structures/ds-que/c (queue)

; 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 = external hidden unnamed_addr constant [16 x i8], align 1
@array = external dso_local global [10 x i32], align 16

; Function Attrs: nounwind uwtable
define dso_local void @enQueue(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr @front, align 4, !tbaa !5
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %5, label %8

5:                                                ; preds = %1
  %6 = load i32, ptr @rear, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 9
  br i1 %7, label %13, label %8

8:                                                ; preds = %5, %1
  %9 = load i32, ptr @front, align 4, !tbaa !5
  %10 = load i32, ptr @rear, align 4, !tbaa !5
  %11 = add nsw i32 %10, 1
  %12 = icmp eq i32 %9, %11
  br i1 %12, label %13, label %15

13:                                               ; preds = %8, %5
  %14 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  br label %30

15:                                               ; preds = %8
  %16 = load i32, ptr @front, align 4, !tbaa !5
  %17 = icmp eq i32 %16, -1
  br i1 %17, label %18, label %22

18:                                               ; preds = %15
  %19 = load i32, ptr @rear, align 4, !tbaa !5
  %20 = icmp eq i32 %19, -1
  br i1 %20, label %21, label %22

21:                                               ; preds = %18
  store i32 0, ptr @front, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %21, %18, %15
  %23 = load i32, ptr @rear, align 4, !tbaa !5
  %24 = add nsw i32 %23, 1
  %25 = srem i32 %24, 10
  store i32 %25, ptr @rear, align 4, !tbaa !5
  %26 = load i32, ptr %2, align 4, !tbaa !5
  %27 = load i32, ptr @rear, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [10 x i32], ptr @array, i64 0, i64 %28
  store i32 %26, ptr %29, align 4, !tbaa !5
  br label %30

30:                                               ; preds = %22, %13
  ret void
}

declare i32 @printf(ptr noundef, ...) #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 = { "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 = external hidden unnamed_addr constant [16 x i8], align 1
@array = external dso_local local_unnamed_addr global [10 x i32], align 16

; Function Attrs: nofree nounwind uwtable
define dso_local void @enQueue(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @front, align 4, !tbaa !5
  %3 = icmp eq i32 %2, 0
  %4 = load i32, ptr @rear, align 4
  %5 = icmp eq i32 %4, 9
  %or.cond = select i1 %3, i1 %5, i1 false
  %6 = add nsw i32 %4, 1
  %7 = icmp eq i32 %2, %6
  %or.cond5 = select i1 %or.cond, i1 true, i1 %7
  br i1 %or.cond5, label %8, label %10

8:                                                ; preds = %1
  %9 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  br label %18

10:                                               ; preds = %1
  %11 = icmp eq i32 %2, -1
  %12 = icmp eq i32 %4, -1
  %or.cond3 = select i1 %11, i1 %12, i1 false
  br i1 %or.cond3, label %13, label %14

13:                                               ; preds = %10
  store i32 0, ptr @front, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %13, %10
  %15 = srem i32 %6, 10
  store i32 %15, ptr @rear, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [10 x i32], ptr @array, i64 0, i64 %16
  store i32 %0, ptr %17, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %14, %8
  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"}


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