; LLVM IR from Dev-XYS/Algorithms :: Queue.ll (Z7enqueuei)

; 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
@tp = 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
@mtp = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z7enqueuei(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = load i32, ptr @tp, align 4, !tbaa !5
  %5 = add nsw i32 %4, 1
  store i32 %5, ptr @tp, align 4, !tbaa !5
  %6 = sext i32 %4 to i64
  %7 = getelementptr inbounds [100000 x i32], ptr @Q, i64 0, i64 %6
  store i32 %3, ptr %7, align 4, !tbaa !5
  %8 = load i32, ptr @tp, align 4, !tbaa !5
  %9 = srem i32 %8, 100000
  store i32 %9, ptr @tp, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %23, %1
  %11 = load i32, ptr @mhp, align 4, !tbaa !5
  %12 = load i32, ptr @mtp, align 4, !tbaa !5
  %13 = icmp ne i32 %11, %12
  br i1 %13, label %14, label %21

14:                                               ; preds = %10
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = load i32, ptr @mhp, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [100000 x i32], ptr @M, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = icmp sgt i32 %15, %19
  br label %21

21:                                               ; preds = %14, %10
  %22 = phi i1 [ false, %10 ], [ %20, %14 ]
  br i1 %22, label %23, label %27

23:                                               ; preds = %21
  %24 = load i32, ptr @mtp, align 4, !tbaa !5
  %25 = add nsw i32 %24, 1
  %26 = srem i32 %25, 100000
  store i32 %26, ptr @mtp, align 4, !tbaa !5
  br label %10, !llvm.loop !9

27:                                               ; preds = %21
  %28 = load i32, ptr %2, align 4, !tbaa !5
  %29 = load i32, ptr @mtp, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr @mtp, align 4, !tbaa !5
  %31 = sext i32 %29 to i64
  %32 = getelementptr inbounds [100000 x i32], ptr @M, i64 0, i64 %31
  store i32 %28, ptr %32, align 4, !tbaa !5
  %33 = load i32, ptr @mtp, align 4, !tbaa !5
  %34 = srem i32 %33, 100000
  store i32 %34, ptr @mtp, align 4, !tbaa !5
  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 = 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"

@Q = external dso_local local_unnamed_addr global [100000 x i32], align 16
@tp = 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
@mtp = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z7enqueuei(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @tp, align 4, !tbaa !5
  %3 = add nsw i32 %2, 1
  %4 = sext i32 %2 to i64
  %5 = getelementptr inbounds [100000 x i32], ptr @Q, i64 0, i64 %4
  store i32 %0, ptr %5, align 4, !tbaa !5
  %6 = srem i32 %3, 100000
  store i32 %6, ptr @tp, align 4, !tbaa !5
  %7 = load i32, ptr @mhp, align 4, !tbaa !5
  %mtp.promoted = load i32, ptr @mtp, align 4, !tbaa !5
  %.not4 = icmp eq i32 %7, %mtp.promoted
  br i1 %.not4, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %1
  %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 slt i32 %10, %0
  %spec.select = select i1 %11, i32 %7, i32 %mtp.promoted
  br label %.critedge

.critedge:                                        ; preds = %.lr.ph, %1
  %.lcssa = phi i32 [ %7, %1 ], [ %spec.select, %.lr.ph ]
  %12 = add nsw i32 %.lcssa, 1
  %13 = sext i32 %.lcssa to i64
  %14 = getelementptr inbounds [100000 x i32], ptr @M, i64 0, i64 %13
  store i32 %0, ptr %14, align 4, !tbaa !5
  %15 = srem i32 %12, 100000
  store i32 %15, ptr @mtp, align 4, !tbaa !5
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind 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,GVNPass,GlobalOptPass,InstCombinePass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass