; LLVM IR from JessonYue/LeetCodeLearning :: Array/zhangpengju/0623统计双位元素个数 (array)

; 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: nounwind uwtable
define dso_local i32 @findNumbers(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %43, %2
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %14, label %46

14:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds i32, ptr %15, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !9
  store i32 %19, ptr %7, align 4, !tbaa !9
  %20 = load i32, ptr %7, align 4, !tbaa !9
  %21 = icmp eq i32 %20, 0
  br i1 %21, label %22, label %23

22:                                               ; preds = %14
  store i32 4, ptr %8, align 4
  br label %40

23:                                               ; preds = %14
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %24

24:                                               ; preds = %27, %23
  %25 = load i32, ptr %7, align 4, !tbaa !9
  %26 = icmp ne i32 %25, 0
  br i1 %26, label %27, label %32

27:                                               ; preds = %24
  %28 = load i32, ptr %9, align 4, !tbaa !9
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %9, align 4, !tbaa !9
  %30 = load i32, ptr %7, align 4, !tbaa !9
  %31 = sdiv i32 %30, 10
  store i32 %31, ptr %7, align 4, !tbaa !9
  br label %24, !llvm.loop !11

32:                                               ; preds = %24
  %33 = load i32, ptr %9, align 4, !tbaa !9
  %34 = srem i32 %33, 2
  %35 = icmp eq i32 %34, 0
  br i1 %35, label %36, label %39

36:                                               ; preds = %32
  %37 = load i32, ptr %6, align 4, !tbaa !9
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %6, align 4, !tbaa !9
  br label %39

39:                                               ; preds = %36, %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  store i32 0, ptr %8, align 4
  br label %40

40:                                               ; preds = %39, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  %41 = load i32, ptr %8, align 4
  switch i32 %41, label %48 [
    i32 0, label %42
    i32 4, label %43
  ]

42:                                               ; preds = %40
  br label %43

43:                                               ; preds = %42, %40
  %44 = load i32, ptr %5, align 4, !tbaa !9
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %5, align 4, !tbaa !9
  br label %10, !llvm.loop !13

46:                                               ; preds = %10
  %47 = load i32, ptr %6, align 4, !tbaa !9
  store i32 1, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %47

48:                                               ; preds = %40
  unreachable
}

; 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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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: nofree norecurse nosync nounwind memory(argmem: read) uwtable
define dso_local i32 @findNumbers(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 0
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext nneg i32 %1 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %12
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %12 ]
  %.01218 = phi i32 [ undef, %.lr.ph.preheader ], [ %.2, %12 ]
  %4 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %12, label %.preheader

.preheader:                                       ; preds = %.lr.ph, %.preheader
  %.016 = phi i32 [ %7, %.preheader ], [ 0, %.lr.ph ]
  %.01115 = phi i32 [ %8, %.preheader ], [ %5, %.lr.ph ]
  %7 = add nuw nsw i32 %.016, 1
  %8 = sdiv i32 %.01115, 10
  %.01115.off = add i32 %.01115, 9
  %.not = icmp ult i32 %.01115.off, 19
  br i1 %.not, label %9, label %.preheader, !llvm.loop !9

9:                                                ; preds = %.preheader
  %10 = and i32 %7, 1
  %11 = xor i32 %10, 1
  %spec.select = add i32 %11, %.01218
  br label %12

12:                                               ; preds = %.lr.ph, %9
  %.2 = phi i32 [ %spec.select, %9 ], [ %.01218, %.lr.ph ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %12, %2
  %.012.lcssa = phi i32 [ undef, %2 ], [ %.2, %12 ]
  ret i32 %.012.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) 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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass