; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/362 Division 1/Problem A/A.ll (Z3hgtx)

; 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 i32 @_Z3hgtx(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i64 %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %5

5:                                                ; preds = %19, %1
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = icmp sle i32 %6, 60
  br i1 %7, label %9, label %8

8:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  br label %22

9:                                                ; preds = %5
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = zext i32 %11 to i64
  %13 = shl i64 1, %12
  %14 = and i64 %10, %13
  %15 = icmp ne i64 %14, 0
  br i1 %15, label %16, label %18

16:                                               ; preds = %9
  %17 = load i32, ptr %4, align 4, !tbaa !9
  store i32 %17, ptr %3, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %16, %9
  br label %19

19:                                               ; preds = %18
  %20 = load i32, ptr %4, align 4, !tbaa !9
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %4, align 4, !tbaa !9
  br label %5, !llvm.loop !11

22:                                               ; preds = %8
  %23 = load i32, ptr %3, align 4, !tbaa !9
  %24 = add nsw i32 %23, 1
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %24
}

; 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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(none) uwtable
define dso_local noundef range(i32 -2147483647, -2147483648) i32 @_Z3hgtx(i64 noundef %0) local_unnamed_addr #0 {
  br label %4

2:                                                ; preds = %4
  %3 = add nsw i32 %spec.select, 1
  ret i32 %3

4:                                                ; preds = %8, %1
  %indvars.iv = phi i64 [ 0, %1 ], [ %indvars.iv.next.3, %8 ]
  %.067 = phi i32 [ 0, %1 ], [ %spec.select.3, %8 ]
  %5 = shl nuw nsw i64 1, %indvars.iv
  %6 = and i64 %5, %0
  %.not = icmp eq i64 %6, 0
  %7 = trunc nuw nsw i64 %indvars.iv to i32
  %spec.select = select i1 %.not, i32 %.067, i32 %7
  %exitcond.not = icmp eq i64 %indvars.iv, 60
  br i1 %exitcond.not, label %2, label %8, !llvm.loop !5

8:                                                ; preds = %4
  %9 = shl nuw nsw i64 2, %indvars.iv
  %10 = and i64 %9, %0
  %.not.1 = icmp eq i64 %10, 0
  %11 = trunc i64 %indvars.iv to i32
  %12 = or disjoint i32 %11, 1
  %spec.select.1 = select i1 %.not.1, i32 %spec.select, i32 %12
  %13 = shl nuw nsw i64 4, %indvars.iv
  %14 = and i64 %13, %0
  %.not.2 = icmp eq i64 %14, 0
  %15 = trunc i64 %indvars.iv to i32
  %16 = or disjoint i32 %15, 2
  %spec.select.2 = select i1 %.not.2, i32 %spec.select.1, i32 %16
  %17 = shl nuw nsw i64 8, %indvars.iv
  %18 = and i64 %17, %0
  %.not.3 = icmp eq i64 %18, 0
  %19 = trunc i64 %indvars.iv to i32
  %20 = or disjoint i32 %19, 3
  %spec.select.3 = select i1 %.not.3, i32 %spec.select.2, i32 %20
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  br label %4
}

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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass