; LLVM IR from Leet-Us-Code/DSA-A-Z-Practice :: Sid's Levels/Level - 1/Stacks_Queue_Dequeue/BuildNormalQueue.ll (ZN7MyQueue3popEv)

; 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"

%class.MyQueue = type { [100005 x i32], i32, i32 }

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN7MyQueue3popEv(ptr noundef nonnull align 4 dereferenceable(400028) %0) #1 align 2 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8
  %6 = getelementptr inbounds %class.MyQueue, ptr %5, i32 0, i32 1
  %7 = load i32, ptr %6, align 4, !tbaa !9
  %8 = getelementptr inbounds %class.MyQueue, ptr %5, i32 0, i32 2
  %9 = load i32, ptr %8, align 4, !tbaa !12
  %10 = icmp eq i32 %7, %9
  br i1 %10, label %11, label %14

11:                                               ; preds = %1
  %12 = getelementptr inbounds %class.MyQueue, ptr %5, i32 0, i32 1
  store i32 0, ptr %12, align 4, !tbaa !9
  %13 = getelementptr inbounds %class.MyQueue, ptr %5, i32 0, i32 2
  store i32 0, ptr %13, align 4, !tbaa !12
  store i32 -1, ptr %2, align 4
  br label %25

14:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %15 = getelementptr inbounds %class.MyQueue, ptr %5, i32 0, i32 0
  %16 = getelementptr inbounds %class.MyQueue, ptr %5, i32 0, i32 1
  %17 = load i32, ptr %16, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [100005 x i32], ptr %15, i64 0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !13
  store i32 %20, ptr %4, align 4, !tbaa !13
  %21 = getelementptr inbounds %class.MyQueue, ptr %5, i32 0, i32 1
  %22 = load i32, ptr %21, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %21, align 4, !tbaa !9
  %24 = load i32, ptr %4, align 4, !tbaa !13
  store i32 %24, ptr %2, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %25

25:                                               ; preds = %14, %11
  %26 = load i32, ptr %2, align 4
  ret i32 %26
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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" }
attributes #2 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 400020}
!10 = !{!"_ZTS7MyQueue", !7, i64 0, !11, i64 400020, !11, i64 400024}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 400024}
!13 = !{!11, !11, i64 0}


; 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) uwtable
define dso_local noundef i32 @_ZN7MyQueue3popEv(ptr nocapture noundef nonnull align 4 dereferenceable(400028) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 400020
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %0, i64 400024
  %5 = load i32, ptr %4, align 4, !tbaa !10
  %6 = icmp eq i32 %3, %5
  br i1 %6, label %7, label %8

7:                                                ; preds = %1
  store i32 0, ptr %4, align 4, !tbaa !10
  br label %13

8:                                                ; preds = %1
  %9 = sext i32 %3 to i64
  %10 = getelementptr inbounds [100005 x i32], ptr %0, i64 0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !11
  %12 = add nsw i32 %3, 1
  br label %13

13:                                               ; preds = %8, %7
  %.sink = phi i32 [ 0, %7 ], [ %12, %8 ]
  %.0 = phi i32 [ -1, %7 ], [ %11, %8 ]
  store i32 %.sink, ptr %2, align 4
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) 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 400020}
!6 = !{!"_ZTS7MyQueue", !7, i64 0, !9, i64 400020, !9, i64 400024}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!6, !9, i64 400024}
!11 = !{!9, !9, i64 0}


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