; LLVM IR from kazunetakahashi/atcoder :: 2017/0129_NJPC2017/B.ll (Z6numberii)

; 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"

@H = external dso_local global i64, align 8
@W = external dso_local global i64, align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z6numberii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i64, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 4, ptr %5, align 8, !tbaa !9
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp eq i32 %6, 1
  br i1 %7, label %8, label %11

8:                                                ; preds = %2
  %9 = load i64, ptr %5, align 8, !tbaa !9
  %10 = add nsw i64 %9, -1
  store i64 %10, ptr %5, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %8, %2
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = load i64, ptr @H, align 8, !tbaa !9
  %15 = icmp eq i64 %13, %14
  br i1 %15, label %16, label %19

16:                                               ; preds = %11
  %17 = load i64, ptr %5, align 8, !tbaa !9
  %18 = add nsw i64 %17, -1
  store i64 %18, ptr %5, align 8, !tbaa !9
  br label %19

19:                                               ; preds = %16, %11
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = icmp eq i32 %20, 1
  br i1 %21, label %22, label %25

22:                                               ; preds = %19
  %23 = load i64, ptr %5, align 8, !tbaa !9
  %24 = add nsw i64 %23, -1
  store i64 %24, ptr %5, align 8, !tbaa !9
  br label %25

25:                                               ; preds = %22, %19
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = load i64, ptr @W, align 8, !tbaa !9
  %29 = icmp eq i64 %27, %28
  br i1 %29, label %30, label %33

30:                                               ; preds = %25
  %31 = load i64, ptr %5, align 8, !tbaa !9
  %32 = add nsw i64 %31, -1
  store i64 %32, ptr %5, align 8, !tbaa !9
  br label %33

33:                                               ; preds = %30, %25
  %34 = load i64, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %34
}

; 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 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}


; 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"

@H = external dso_local local_unnamed_addr global i64, align 8
@W = external dso_local local_unnamed_addr global i64, align 8

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_Z6numberii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %0, 1
  %spec.select = select i1 %3, i64 3, i64 4
  %4 = sext i32 %0 to i64
  %5 = load i64, ptr @H, align 8, !tbaa !5
  %6 = icmp eq i64 %5, %4
  %7 = sext i1 %6 to i64
  %8 = icmp eq i32 %1, 1
  %9 = sext i1 %8 to i64
  %10 = sext i32 %1 to i64
  %11 = load i64, ptr @W, align 8, !tbaa !5
  %12 = icmp eq i64 %11, %10
  %13 = sext i1 %12 to i64
  %.1 = add nsw i64 %spec.select, %9
  %.2 = add nsw i64 %.1, %7
  %.3 = add nsw i64 %.2, %13
  ret i64 %.3
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass