; LLVM IR from HarshCasper/NeoAlgo :: C-Plus-Plus/ds/Double_Ended_Queue.ll (Z12enqueue_reari)

; 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

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z12enqueue_reari(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 2), align 4, !tbaa !9
  %4 = add nsw i32 %3, 1
  %5 = srem i32 %4, 10
  %6 = load i32, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 1), align 4, !tbaa !11
  %7 = icmp ne i32 %5, %6
  br i1 %7, label %8, label %21

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

11:                                               ; preds = %8
  store i32 0, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 1), align 4, !tbaa !11
  store i32 0, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 2), align 4, !tbaa !9
  br label %16

12:                                               ; preds = %8
  %13 = load i32, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 2), align 4, !tbaa !9
  %14 = add nsw i32 %13, 1
  %15 = srem i32 %14, 10
  store i32 %15, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 2), align 4, !tbaa !9
  br label %16

16:                                               ; preds = %12, %11
  %17 = load i32, ptr %2, align 4, !tbaa !5
  %18 = load i32, ptr getelementptr inbounds (%struct.dequeue, ptr @dq, i32 0, i32 2), align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [10 x i32], ptr @dq, i64 0, i64 %19
  store i32 %17, ptr %20, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %16, %1
  ret void
}

attributes #0 = { mustprogress 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++ TBAA"}
!9 = !{!10, !6, i64 44}
!10 = !{!"_ZTS7dequeue", !7, i64 0, !6, i64 40, !6, i64 44}
!11 = !{!10, !6, i64 40}


; 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

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z12enqueue_reari(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr getelementptr inbounds (i8, ptr @dq, i64 44), align 4, !tbaa !5
  %3 = add nsw i32 %2, 1
  %4 = srem i32 %3, 10
  %5 = load i32, ptr getelementptr inbounds (i8, ptr @dq, i64 40), align 4, !tbaa !10
  %.not = icmp eq i32 %4, %5
  br i1 %.not, label %12, label %6

6:                                                ; preds = %1
  %7 = icmp eq i32 %2, -1
  br i1 %7, label %8, label %9

8:                                                ; preds = %6
  store i32 0, ptr getelementptr inbounds (i8, ptr @dq, i64 40), align 4, !tbaa !10
  br label %9

9:                                                ; preds = %6, %8
  store i32 %4, ptr getelementptr inbounds (i8, ptr @dq, i64 44), align 4, !tbaa !5
  %10 = sext i32 %4 to i64
  %11 = getelementptr inbounds [10 x i32], ptr @dq, i64 0, i64 %10
  store i32 %0, ptr %11, align 4, !tbaa !11
  br label %12

12:                                               ; preds = %9, %1
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) 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, !9, i64 44}
!6 = !{!"_ZTS7dequeue", !7, i64 0, !9, i64 40, !9, i64 44}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!6, !9, i64 40}
!11 = !{!9, !9, i64 0}


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