; LLVM IR from mahendramahara/DSA-in-C-Programing :: QUEUE (circularqueue)

; 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
@items = external dso_local global [5 x i32], align 16
@.str.4 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [14 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [15 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local i32 @isEmpty() #0

declare i32 @printf(ptr noundef, ...) #1

; 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

; Function Attrs: nounwind uwtable
define dso_local void @display() #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  %2 = call i32 @isEmpty()
  %3 = icmp ne i32 %2, 0
  br i1 %3, label %4, label %6

4:                                                ; preds = %0
  %5 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  br label %33

6:                                                ; preds = %0
  %7 = load i32, ptr @front, align 4, !tbaa !5
  %8 = call i32 (ptr, ...) @printf(ptr noundef @.str.5, i32 noundef %7)
  %9 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  %10 = load i32, ptr @front, align 4, !tbaa !5
  store i32 %10, ptr %1, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %21, %6
  %12 = load i32, ptr %1, align 4, !tbaa !5
  %13 = load i32, ptr @rear, align 4, !tbaa !5
  %14 = icmp ne i32 %12, %13
  br i1 %14, label %15, label %25

15:                                               ; preds = %11
  %16 = load i32, ptr %1, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [5 x i32], ptr @items, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = call i32 (ptr, ...) @printf(ptr noundef @.str.7, i32 noundef %19)
  br label %21

21:                                               ; preds = %15
  %22 = load i32, ptr %1, align 4, !tbaa !5
  %23 = add nsw i32 %22, 1
  %24 = srem i32 %23, 5
  store i32 %24, ptr %1, align 4, !tbaa !5
  br label %11, !llvm.loop !9

25:                                               ; preds = %11
  %26 = load i32, ptr %1, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [5 x i32], ptr @items, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = call i32 (ptr, ...) @printf(ptr noundef @.str.7, i32 noundef %29)
  %31 = load i32, ptr @rear, align 4, !tbaa !5
  %32 = call i32 (ptr, ...) @printf(ptr noundef @.str.8, i32 noundef %31)
  br label %33

33:                                               ; preds = %25, %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret void
}

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" }
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"}
!9 = distinct !{!9, !10}
!10 = !{!"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"

@front = external dso_local local_unnamed_addr global i32, align 4
@rear = external dso_local local_unnamed_addr global i32, align 4
@items = external dso_local local_unnamed_addr global [5 x i32], align 16
@.str.4 = external hidden unnamed_addr constant [16 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [14 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [15 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local i32 @isEmpty() local_unnamed_addr #0

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

; Function Attrs: nounwind uwtable
define dso_local void @display() local_unnamed_addr #0 {
  %1 = tail call i32 @isEmpty()
  %.not = icmp eq i32 %1, 0
  br i1 %.not, label %4, label %2

2:                                                ; preds = %0
  %3 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  br label %23

4:                                                ; preds = %0
  %5 = load i32, ptr @front, align 4, !tbaa !5
  %6 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5, i32 noundef %5)
  %7 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6)
  %8 = load i32, ptr @front, align 4, !tbaa !5
  %9 = load i32, ptr @rear, align 4, !tbaa !5
  %.not45 = icmp eq i32 %8, %9
  br i1 %.not45, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.06 = phi i32 [ %15, %.lr.ph ], [ %8, %4 ]
  %10 = sext i32 %.06 to i64
  %11 = getelementptr inbounds [5 x i32], ptr @items, i64 0, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7, i32 noundef %12)
  %14 = add nsw i32 %.06, 1
  %15 = srem i32 %14, 5
  %16 = load i32, ptr @rear, align 4, !tbaa !5
  %.not4 = icmp eq i32 %15, %16
  br i1 %.not4, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %4
  %.0.lcssa = phi i32 [ %8, %4 ], [ %15, %.lr.ph ]
  %17 = sext i32 %.0.lcssa to i64
  %18 = getelementptr inbounds [5 x i32], ptr @items, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7, i32 noundef %19)
  %21 = load i32, ptr @rear, align 4, !tbaa !5
  %22 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8, i32 noundef %21)
  br label %23

23:                                               ; preds = %._crit_edge, %2
  ret void
}

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 = { 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,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass