; LLVM IR from tangjz/acm-icpc :: codeforces/gym/100662C.ll (Z2opii)

; 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"

@_ZL4oper = external hidden constant [4 x [4 x i32]], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z2opii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  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 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !5
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp slt i32 %6, 0
  br i1 %7, label %8, label %13

8:                                                ; preds = %2
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = sub nsw i32 0, %9
  store i32 %10, ptr %3, align 4, !tbaa !5
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = xor i32 %11, 1
  store i32 %12, ptr %5, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %8, %2
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = icmp slt i32 %14, 0
  br i1 %15, label %16, label %21

16:                                               ; preds = %13
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = sub nsw i32 0, %17
  store i32 %18, ptr %4, align 4, !tbaa !5
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = xor i32 %19, 1
  store i32 %20, ptr %5, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %16, %13
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = icmp ne i32 %22, 0
  br i1 %23, label %24, label %35

24:                                               ; preds = %21
  %25 = load i32, ptr %3, align 4, !tbaa !5
  %26 = sub nsw i32 %25, 1
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [4 x [4 x i32]], ptr @_ZL4oper, i64 0, i64 %27
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = sub nsw i32 %29, 1
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds [4 x i32], ptr %28, i64 0, i64 %31
  %33 = load i32, ptr %32, align 4, !tbaa !5
  %34 = sub nsw i32 0, %33
  br label %45

35:                                               ; preds = %21
  %36 = load i32, ptr %3, align 4, !tbaa !5
  %37 = sub nsw i32 %36, 1
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [4 x [4 x i32]], ptr @_ZL4oper, i64 0, i64 %38
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = sub nsw i32 %40, 1
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds [4 x i32], ptr %39, i64 0, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !5
  br label %45

45:                                               ; preds = %35, %24
  %46 = phi i32 [ %34, %24 ], [ %44, %35 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %46
}

; 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"}


; 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"

@_ZL4oper = external hidden local_unnamed_addr constant [4 x [4 x i32]], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i32 @_Z2opii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %spec.select = tail call i32 @llvm.abs.i32(i32 %0, i1 true)
  %.011 = tail call i32 @llvm.abs.i32(i32 %1, i1 true)
  %.lobit18 = xor i32 %1, %0
  %3 = add nsw i32 %spec.select, -1
  %4 = sext i32 %3 to i64
  %5 = add nsw i32 %.011, -1
  %6 = sext i32 %5 to i64
  %7 = getelementptr inbounds [4 x [4 x i32]], ptr @_ZL4oper, i64 0, i64 %4, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = sub nsw i32 0, %8
  %.not19 = icmp slt i32 %.lobit18, 0
  %10 = select i1 %.not19, i32 %9, i32 %8
  ret i32 %10
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse 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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass