; LLVM IR from HarshCasper/NeoAlgo :: C/ds (Double_Ended_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"

%struct.dequeue = type { [10 x i32], i32, i32 }

@dq = external dso_local global %struct.dequeue, align 4
@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = 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() #1 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = load i32, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 1), align 4, !tbaa !5
  %5 = load i32, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 2), align 4, !tbaa !10
  %6 = icmp sle i32 %4, %5
  br i1 %6, label %7, label %24

7:                                                ; preds = %0
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  %8 = load i32, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 1), align 4, !tbaa !5
  store i32 %8, ptr %1, align 4, !tbaa !11
  br label %9

9:                                                ; preds = %20, %7
  %10 = load i32, ptr %1, align 4, !tbaa !11
  %11 = load i32, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 2), align 4, !tbaa !10
  %12 = icmp sle i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  br label %23

14:                                               ; preds = %9
  %15 = load i32, ptr %1, align 4, !tbaa !11
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [10 x i32], ptr @dq, i64 0, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !11
  %19 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %18)
  br label %20

20:                                               ; preds = %14
  %21 = load i32, ptr %1, align 4, !tbaa !11
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %1, align 4, !tbaa !11
  br label %9, !llvm.loop !12

23:                                               ; preds = %13
  br label %55

24:                                               ; preds = %0
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  %25 = load i32, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 1), align 4, !tbaa !5
  store i32 %25, ptr %2, align 4, !tbaa !11
  br label %26

26:                                               ; preds = %36, %24
  %27 = load i32, ptr %2, align 4, !tbaa !11
  %28 = icmp sle i32 %27, 9
  br i1 %28, label %30, label %29

29:                                               ; preds = %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  br label %39

30:                                               ; preds = %26
  %31 = load i32, ptr %2, align 4, !tbaa !11
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [10 x i32], ptr @dq, i64 0, i64 %32
  %34 = load i32, ptr %33, align 4, !tbaa !11
  %35 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %34)
  br label %36

36:                                               ; preds = %30
  %37 = load i32, ptr %2, align 4, !tbaa !11
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %2, align 4, !tbaa !11
  br label %26, !llvm.loop !14

39:                                               ; preds = %29
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !11
  br label %40

40:                                               ; preds = %51, %39
  %41 = load i32, ptr %3, align 4, !tbaa !11
  %42 = load i32, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 2), align 4, !tbaa !10
  %43 = icmp sle i32 %41, %42
  br i1 %43, label %45, label %44

44:                                               ; preds = %40
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %54

45:                                               ; preds = %40
  %46 = load i32, ptr %3, align 4, !tbaa !11
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds [10 x i32], ptr @dq, i64 0, i64 %47
  %49 = load i32, ptr %48, align 4, !tbaa !11
  %50 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %49)
  br label %51

51:                                               ; preds = %45
  %52 = load i32, ptr %3, align 4, !tbaa !11
  %53 = add nsw i32 %52, 1
  store i32 %53, ptr %3, align 4, !tbaa !11
  br label %40, !llvm.loop !15

54:                                               ; preds = %44
  br label %55

55:                                               ; preds = %54, %23
  %56 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  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, !9, i64 40}
!6 = !{!"", !7, i64 0, !9, i64 40, !9, i64 44}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!6, !9, i64 44}
!11 = !{!9, !9, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = distinct !{!14, !13}
!15 = distinct !{!15, !13}


; 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"

%struct.dequeue = type { [10 x i32], i32, i32 }

@dq = external dso_local local_unnamed_addr global %struct.dequeue, align 4
@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local void @display() local_unnamed_addr #0 {
  %1 = load i32, ptr getelementptr inbounds (i8, ptr @dq, i64 40), align 4, !tbaa !5
  %2 = load i32, ptr getelementptr inbounds (i8, ptr @dq, i64 44), align 4, !tbaa !10
  %.not = icmp sgt i32 %1, %2
  br i1 %.not, label %.preheader14, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %0
  %3 = sext i32 %1 to i64
  br label %.lr.ph

.preheader14:                                     ; preds = %0
  %4 = icmp slt i32 %1, 10
  br i1 %4, label %.lr.ph20.preheader, label %.preheader

.lr.ph20.preheader:                               ; preds = %.preheader14
  %5 = sext i32 %1 to i64
  br label %.lr.ph20

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %3, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %6 = getelementptr inbounds [10 x i32], ptr @dq, i64 0, i64 %indvars.iv
  %7 = load i32, ptr %6, align 4, !tbaa !11
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %7)
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %9 = load i32, ptr getelementptr inbounds (i8, ptr @dq, i64 44), align 4, !tbaa !10
  %10 = sext i32 %9 to i64
  %.not13.not = icmp slt i64 %indvars.iv, %10
  br i1 %.not13.not, label %.lr.ph, label %.loopexit, !llvm.loop !12

.preheader.loopexit:                              ; preds = %.lr.ph20
  %.pre = load i32, ptr getelementptr inbounds (i8, ptr @dq, i64 44), align 4, !tbaa !10
  br label %.preheader

.preheader:                                       ; preds = %.preheader.loopexit, %.preheader14
  %11 = phi i32 [ %.pre, %.preheader.loopexit ], [ %2, %.preheader14 ]
  %.not1221 = icmp slt i32 %11, 0
  br i1 %.not1221, label %.loopexit, label %.lr.ph23

.lr.ph20:                                         ; preds = %.lr.ph20.preheader, %.lr.ph20
  %indvars.iv26 = phi i64 [ %5, %.lr.ph20.preheader ], [ %indvars.iv.next27, %.lr.ph20 ]
  %12 = getelementptr inbounds [10 x i32], ptr @dq, i64 0, i64 %indvars.iv26
  %13 = load i32, ptr %12, align 4, !tbaa !11
  %14 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %13)
  %indvars.iv.next27 = add nsw i64 %indvars.iv26, 1
  %15 = and i64 %indvars.iv.next27, 4294967295
  %exitcond.not = icmp eq i64 %15, 10
  br i1 %exitcond.not, label %.preheader.loopexit, label %.lr.ph20, !llvm.loop !14

.lr.ph23:                                         ; preds = %.preheader, %.lr.ph23
  %indvars.iv29 = phi i64 [ %indvars.iv.next30, %.lr.ph23 ], [ 0, %.preheader ]
  %16 = getelementptr inbounds [10 x i32], ptr @dq, i64 0, i64 %indvars.iv29
  %17 = load i32, ptr %16, align 4, !tbaa !11
  %18 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %17)
  %indvars.iv.next30 = add nuw nsw i64 %indvars.iv29, 1
  %19 = load i32, ptr getelementptr inbounds (i8, ptr @dq, i64 44), align 4, !tbaa !10
  %20 = sext i32 %19 to i64
  %.not12.not = icmp slt i64 %indvars.iv29, %20
  br i1 %.not12.not, label %.lr.ph23, label %.loopexit, !llvm.loop !15

.loopexit:                                        ; preds = %.lr.ph, %.lr.ph23, %.preheader
  %21 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1)
  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, !9, i64 40}
!6 = !{!"", !7, i64 0, !9, i64 40, !9, i64 44}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!6, !9, i64 44}
!11 = !{!9, !9, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = distinct !{!14, !13}
!15 = distinct !{!15, !13}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass