; LLVM IR from anaeim/apriori :: main.ll (Z25select_counting_algorithmii)

; 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"

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z25select_counting_algorithmii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 1
  br i1 %7, label %8, label %10

8:                                                ; preds = %2
  %9 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %9, ptr %3, align 4
  br label %31

10:                                               ; preds = %2
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = icmp eq i32 %11, %12
  br i1 %13, label %14, label %15

14:                                               ; preds = %10
  store i32 1, ptr %3, align 4
  br label %31

15:                                               ; preds = %10
  %16 = load i32, ptr %5, align 4, !tbaa !5
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = icmp sgt i32 %16, %17
  br i1 %18, label %19, label %20

19:                                               ; preds = %15
  store i32 0, ptr %3, align 4
  br label %31

20:                                               ; preds = %15
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = sub nsw i32 %21, 1
  %23 = load i32, ptr %5, align 4, !tbaa !5
  %24 = call noundef i32 @_Z25select_counting_algorithmii(i32 noundef %22, i32 noundef %23)
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = sub nsw i32 %25, 1
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = sub nsw i32 %27, 1
  %29 = call noundef i32 @_Z25select_counting_algorithmii(i32 noundef %26, i32 noundef %28)
  %30 = add nsw i32 %24, %29
  store i32 %30, ptr %3, align 4
  br label %31

31:                                               ; preds = %20, %19, %14, %8
  %32 = load i32, ptr %3, align 4
  ret i32 %32
}

attributes #0 = { mustprogress 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"}


; 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 nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i32 @_Z25select_counting_algorithmii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %1, 1
  br i1 %3, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %4 = add i32 %0, 1
  %5 = sub i32 %4, %1
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %tailrecurse
  %.tr1316 = phi i32 [ %11, %tailrecurse ], [ %1, %.lr.ph.preheader ]
  %.tr15 = phi i32 [ %9, %tailrecurse ], [ %0, %.lr.ph.preheader ]
  %accumulator.tr14 = phi i32 [ %12, %tailrecurse ], [ 0, %.lr.ph.preheader ]
  %6 = icmp eq i32 %.tr1316, %.tr15
  br i1 %6, label %._crit_edge, label %7

7:                                                ; preds = %.lr.ph
  %8 = icmp sgt i32 %.tr1316, %.tr15
  br i1 %8, label %._crit_edge, label %tailrecurse

tailrecurse:                                      ; preds = %7
  %9 = add nsw i32 %.tr15, -1
  %10 = tail call noundef i32 @_Z25select_counting_algorithmii(i32 noundef %9, i32 noundef %.tr1316)
  %11 = add nsw i32 %.tr1316, -1
  %12 = add nsw i32 %10, %accumulator.tr14
  %13 = icmp eq i32 %11, 1
  br i1 %13, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %tailrecurse, %.lr.ph, %7, %2
  %accumulator.tr.lcssa = phi i32 [ 0, %2 ], [ %accumulator.tr14, %7 ], [ %accumulator.tr14, %.lr.ph ], [ %12, %tailrecurse ]
  %.0 = phi i32 [ %0, %2 ], [ 0, %7 ], [ 1, %.lr.ph ], [ %5, %tailrecurse ]
  %accumulator.ret.tr = add nsw i32 %.0, %accumulator.tr.lcssa
  ret i32 %accumulator.ret.tr
}

attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(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)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass