; LLVM IR from Dev-XYS/Algorithms :: Queue.ll (Z7dequeuev)

; 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"

@Q = external dso_local global [100000 x i32], align 16
@hp = external dso_local global i32, align 4
@M = external dso_local global [100000 x i32], align 16
@mhp = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z7dequeuev() #0 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  %2 = load i32, ptr @hp, align 4, !tbaa !5
  %3 = add nsw i32 %2, 1
  store i32 %3, ptr @hp, align 4, !tbaa !5
  %4 = sext i32 %2 to i64
  %5 = getelementptr inbounds [100000 x i32], ptr @Q, i64 0, i64 %4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %6, ptr %1, align 4, !tbaa !5
  %7 = load i32, ptr @hp, align 4, !tbaa !5
  %8 = srem i32 %7, 100000
  store i32 %8, ptr @hp, align 4, !tbaa !5
  %9 = load i32, ptr %1, align 4, !tbaa !5
  %10 = load i32, ptr @mhp, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [100000 x i32], ptr @M, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = icmp eq i32 %9, %13
  br i1 %14, label %15, label %19

15:                                               ; preds = %0
  %16 = load i32, ptr @mhp, align 4, !tbaa !5
  %17 = add nsw i32 %16, 1
  %18 = srem i32 %17, 100000
  store i32 %18, ptr @mhp, align 4, !tbaa !5
  br label %19

19:                                               ; preds = %15, %0
  %20 = load i32, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  ret i32 %20
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; 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"

@Q = external dso_local local_unnamed_addr global [100000 x i32], align 16
@hp = external dso_local local_unnamed_addr global i32, align 4
@M = external dso_local local_unnamed_addr global [100000 x i32], align 16
@mhp = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i32 @_Z7dequeuev() local_unnamed_addr #0 {
  %1 = load i32, ptr @hp, align 4, !tbaa !5
  %2 = add nsw i32 %1, 1
  %3 = sext i32 %1 to i64
  %4 = getelementptr inbounds [100000 x i32], ptr @Q, i64 0, i64 %3
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = srem i32 %2, 100000
  store i32 %6, ptr @hp, align 4, !tbaa !5
  %7 = load i32, ptr @mhp, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [100000 x i32], ptr @M, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = icmp eq i32 %5, %10
  br i1 %11, label %12, label %15

12:                                               ; preds = %0
  %13 = add nsw i32 %7, 1
  %14 = srem i32 %13, 100000
  store i32 %14, ptr @mhp, align 4, !tbaa !5
  br label %15

15:                                               ; preds = %12, %0
  ret i32 %5
}

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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,PostOrderFunctionAttrsPass,SROAPass