; 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"

@i = external dso_local global i32, align 4

; Function Attrs: nounwind uwtable
declare dso_local void @enQueue(i32 noundef) #0

; Function Attrs: nounwind uwtable
declare dso_local void @deQueue() #0

; Function Attrs: nounwind uwtable
declare dso_local void @display() #0

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  store i32 0, ptr @i, align 4, !tbaa !5
  br label %2

2:                                                ; preds = %8, %0
  %3 = load i32, ptr @i, align 4, !tbaa !5
  %4 = icmp slt i32 %3, 10
  br i1 %4, label %5, label %11

5:                                                ; preds = %2
  %6 = load i32, ptr @i, align 4, !tbaa !5
  %7 = add nsw i32 %6, 5
  call void @enQueue(i32 noundef %7)
  br label %8

8:                                                ; preds = %5
  %9 = load i32, ptr @i, align 4, !tbaa !5
  %10 = add nsw i32 %9, 1
  store i32 %10, ptr @i, align 4, !tbaa !5
  br label %2, !llvm.loop !9

11:                                               ; preds = %2
  call void @deQueue()
  call void @deQueue()
  call void @display()
  call void @enQueue(i32 noundef 35)
  call void @display()
  %12 = load i32, ptr %1, align 4
  ret i32 %12
}

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" }

!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"

@i = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: nounwind uwtable
declare dso_local void @enQueue(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @deQueue() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @display() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  store i32 0, ptr @i, align 4, !tbaa !5
  br label %1

1:                                                ; preds = %0, %1
  %storemerge1 = phi i32 [ 0, %0 ], [ %4, %1 ]
  %2 = add nsw i32 %storemerge1, 5
  tail call void @enQueue(i32 noundef %2)
  %3 = load i32, ptr @i, align 4, !tbaa !5
  %4 = add nsw i32 %3, 1
  store i32 %4, ptr @i, align 4, !tbaa !5
  %5 = icmp slt i32 %3, 9
  br i1 %5, label %1, label %6, !llvm.loop !9

6:                                                ; preds = %1
  tail call void @deQueue()
  tail call void @deQueue()
  tail call void @display()
  tail call void @enQueue(i32 noundef 35)
  tail call void @display()
  ret i32 0
}

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" }

!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: EarlyCSEPass,GlobalOptPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass