; LLVM IR from manishbisht/Competitive-Programming :: Google/Kickstart/2017 Round B APAC/Problem 2/Problem 2.ll (Z5powerxx)

; 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 @_Z5powerxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %8 = load i64, ptr %5, align 8, !tbaa !5
  %9 = icmp eq i64 %8, 0
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store i64 1, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %38

11:                                               ; preds = %2
  %12 = load i64, ptr %4, align 8, !tbaa !5
  %13 = load i64, ptr %5, align 8, !tbaa !5
  %14 = sdiv i64 %13, 2
  %15 = call noundef i64 @_Z5powerxx(i64 noundef %12, i64 noundef %14)
  store i64 %15, ptr %6, align 8, !tbaa !5
  %16 = load i64, ptr %5, align 8, !tbaa !5
  %17 = srem i64 %16, 2
  %18 = icmp eq i64 %17, 0
  br i1 %18, label %19, label %23

19:                                               ; preds = %11
  %20 = load i64, ptr %6, align 8, !tbaa !5
  %21 = load i64, ptr %6, align 8, !tbaa !5
  %22 = mul nsw i64 %20, %21
  store i64 %22, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %38

23:                                               ; preds = %11
  %24 = load i64, ptr %5, align 8, !tbaa !5
  %25 = icmp sgt i64 %24, 0
  br i1 %25, label %26, label %32

26:                                               ; preds = %23
  %27 = load i64, ptr %4, align 8, !tbaa !5
  %28 = load i64, ptr %6, align 8, !tbaa !5
  %29 = mul nsw i64 %27, %28
  %30 = load i64, ptr %6, align 8, !tbaa !5
  %31 = mul nsw i64 %29, %30
  store i64 %31, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %38

32:                                               ; preds = %23
  %33 = load i64, ptr %6, align 8, !tbaa !5
  %34 = load i64, ptr %6, align 8, !tbaa !5
  %35 = mul nsw i64 %33, %34
  %36 = load i64, ptr %4, align 8, !tbaa !5
  %37 = sdiv i64 %35, %36
  store i64 %37, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %38

38:                                               ; preds = %32, %26, %19, %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %39 = load i64, ptr %3, align 8
  ret i64 %39
}

; 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 @_Z5powerxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i64 %1, 0
  br i1 %3, label %18, label %4

4:                                                ; preds = %2
  %5 = sdiv i64 %1, 2
  %6 = tail call noundef i64 @_Z5powerxx(i64 noundef %0, i64 noundef %5)
  %7 = and i64 %1, 1
  %8 = icmp eq i64 %7, 0
  br i1 %8, label %9, label %11

9:                                                ; preds = %4
  %10 = mul nsw i64 %6, %6
  br label %18

11:                                               ; preds = %4
  %12 = icmp sgt i64 %1, 0
  %13 = mul i64 %6, %6
  br i1 %12, label %14, label %16

14:                                               ; preds = %11
  %15 = mul i64 %13, %0
  br label %18

16:                                               ; preds = %11
  %17 = sdiv i64 %13, %0
  br label %18

18:                                               ; preds = %2, %16, %14, %9
  %.0 = phi i64 [ %10, %9 ], [ %15, %14 ], [ %17, %16 ], [ 1, %2 ]
  ret i64 %.0
}

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: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass