; LLVM IR from Tudor67/Competitive-Programming :: Codeforces/#624#div3/A/A.ll (Z5solveRKiS0_)

; 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 nounwind uwtable
define dso_local noundef signext i16 @_Z5solveRKiS0_(ptr noundef nonnull align 4 dereferenceable(4) %0, ptr noundef nonnull align 4 dereferenceable(4) %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i16, align 2
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 2, ptr %5) #2
  store i16 0, ptr %5, align 2, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = load i32, ptr %7, align 4, !tbaa !11
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = load i32, ptr %9, align 4, !tbaa !11
  %11 = icmp eq i32 %8, %10
  br i1 %11, label %12, label %13

12:                                               ; preds = %2
  store i16 0, ptr %5, align 2, !tbaa !9
  br label %44

13:                                               ; preds = %2
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = load i32, ptr %14, align 4, !tbaa !11
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load i32, ptr %16, align 4, !tbaa !11
  %18 = icmp slt i32 %15, %17
  br i1 %18, label %19, label %31

19:                                               ; preds = %13
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = load i32, ptr %20, align 4, !tbaa !11
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load i32, ptr %22, align 4, !tbaa !11
  %24 = sub nsw i32 %21, %23
  store i32 %24, ptr %6, align 4, !tbaa !11
  %25 = load i32, ptr %6, align 4, !tbaa !11
  %26 = srem i32 %25, 2
  %27 = icmp eq i32 %26, 0
  %28 = zext i1 %27 to i32
  %29 = add nsw i32 1, %28
  %30 = trunc i32 %29 to i16
  store i16 %30, ptr %5, align 2, !tbaa !9
  br label %43

31:                                               ; preds = %13
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = load i32, ptr %32, align 4, !tbaa !11
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = load i32, ptr %34, align 4, !tbaa !11
  %36 = sub nsw i32 %33, %35
  store i32 %36, ptr %6, align 4, !tbaa !11
  %37 = load i32, ptr %6, align 4, !tbaa !11
  %38 = srem i32 %37, 2
  %39 = icmp eq i32 %38, 1
  %40 = zext i1 %39 to i32
  %41 = add nsw i32 1, %40
  %42 = trunc i32 %41 to i16
  store i16 %42, ptr %5, align 2, !tbaa !9
  br label %43

43:                                               ; preds = %31, %19
  br label %44

44:                                               ; preds = %43, %12
  %45 = load i16, ptr %5, align 2, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 2, ptr %5) #2
  ret i16 %45
}

; 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"short", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef signext range(i16 0, 3) i16 @_Z5solveRKiS0_(ptr nocapture noundef nonnull readonly align 4 dereferenceable(4) %0, ptr nocapture noundef nonnull readonly align 4 dereferenceable(4) %1) local_unnamed_addr #0 {
  %3 = load i32, ptr %0, align 4, !tbaa !5
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = icmp eq i32 %3, %4
  br i1 %5, label %18, label %6

6:                                                ; preds = %2
  %7 = icmp slt i32 %3, %4
  br i1 %7, label %8, label %13

8:                                                ; preds = %6
  %9 = sub nsw i32 %4, %3
  %10 = trunc i32 %9 to i16
  %11 = and i16 %10, 1
  %12 = sub nuw nsw i16 2, %11
  br label %18

13:                                               ; preds = %6
  %14 = sub nsw i32 %3, %4
  %15 = and i32 %14, -2147483647
  %16 = icmp eq i32 %15, 1
  %17 = select i1 %16, i16 2, i16 1
  br label %18

18:                                               ; preds = %2, %8, %13
  %.0 = phi i16 [ %12, %8 ], [ %17, %13 ], [ 0, %2 ]
  ret i16 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn 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++ TBAA"}


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