; LLVM IR from DionysiosB/CodeForces :: 0300-0399/337C-Quiz.ll (Z9findPowerxxx)

; 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 i64 @_Z9findPowerxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  store i64 %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !5
  %10 = load i64, ptr %6, align 8, !tbaa !5
  %11 = icmp slt i64 %10, 0
  br i1 %11, label %12, label %13

12:                                               ; preds = %3
  store i64 -1, ptr %4, align 8
  br label %51

13:                                               ; preds = %3
  %14 = load i64, ptr %6, align 8, !tbaa !5
  %15 = icmp eq i64 %14, 0
  br i1 %15, label %16, label %17

16:                                               ; preds = %13
  store i64 1, ptr %4, align 8
  br label %51

17:                                               ; preds = %13
  %18 = load i64, ptr %6, align 8, !tbaa !5
  %19 = icmp eq i64 %18, 1
  br i1 %19, label %20, label %24

20:                                               ; preds = %17
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = load i64, ptr %7, align 8, !tbaa !5
  %23 = srem i64 %21, %22
  store i64 %23, ptr %4, align 8
  br label %51

24:                                               ; preds = %17
  br label %25

25:                                               ; preds = %24
  br label %26

26:                                               ; preds = %25
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %27 = load i64, ptr %5, align 8, !tbaa !5
  %28 = load i64, ptr %6, align 8, !tbaa !5
  %29 = sdiv i64 %28, 2
  %30 = load i64, ptr %7, align 8, !tbaa !5
  %31 = call noundef i64 @_Z9findPowerxxx(i64 noundef %27, i64 noundef %29, i64 noundef %30)
  store i64 %31, ptr %8, align 8, !tbaa !5
  %32 = load i64, ptr %8, align 8, !tbaa !5
  %33 = load i64, ptr %8, align 8, !tbaa !5
  %34 = mul nsw i64 %32, %33
  %35 = load i64, ptr %7, align 8, !tbaa !5
  %36 = srem i64 %34, %35
  store i64 %36, ptr %8, align 8, !tbaa !5
  %37 = load i64, ptr %6, align 8, !tbaa !5
  %38 = srem i64 %37, 2
  %39 = icmp ne i64 %38, 0
  br i1 %39, label %40, label %46

40:                                               ; preds = %26
  %41 = load i64, ptr %5, align 8, !tbaa !5
  %42 = load i64, ptr %8, align 8, !tbaa !5
  %43 = mul nsw i64 %41, %42
  %44 = load i64, ptr %7, align 8, !tbaa !5
  %45 = srem i64 %43, %44
  store i64 %45, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %50

46:                                               ; preds = %26
  %47 = load i64, ptr %8, align 8, !tbaa !5
  %48 = load i64, ptr %7, align 8, !tbaa !5
  %49 = srem i64 %47, %48
  store i64 %49, ptr %4, align 8
  store i32 1, ptr %9, align 4
  br label %50

50:                                               ; preds = %46, %40
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %51

51:                                               ; preds = %50, %20, %16, %12
  %52 = load i64, ptr %4, align 8
  ret i64 %52
}

; 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 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 = !{!"long long", !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 i64 @_Z9findPowerxxx(i64 noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = icmp slt i64 %1, 0
  br i1 %4, label %15, label %5

5:                                                ; preds = %3
  switch i64 %1, label %6 [
    i64 0, label %15
    i64 1, label %.sink.split
  ]

6:                                                ; preds = %5
  %7 = lshr i64 %1, 1
  %8 = tail call noundef i64 @_Z9findPowerxxx(i64 noundef %0, i64 noundef %7, i64 noundef %2)
  %9 = mul nsw i64 %8, %8
  %10 = srem i64 %9, %2
  %11 = and i64 %1, 1
  %.not = icmp eq i64 %11, 0
  br i1 %.not, label %15, label %12

12:                                               ; preds = %6
  %13 = mul nsw i64 %10, %0
  br label %.sink.split

.sink.split:                                      ; preds = %5, %12
  %.sink = phi i64 [ %13, %12 ], [ %0, %5 ]
  %14 = srem i64 %.sink, %2
  br label %15

15:                                               ; preds = %.sink.split, %6, %5, %3
  %.1 = phi i64 [ -1, %3 ], [ 1, %5 ], [ %10, %6 ], [ %14, %.sink.split ]
  ret i64 %.1
}

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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass