; LLVM IR from DionysiosB/CodeForces :: 1600-1699/1692D-TheClock.ll (Z7isPalinl)

; 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 zeroext i1 @_Z7isPalinl(i64 noundef %0) #0 {
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  store i64 %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  %5 = load i64, ptr %2, align 8, !tbaa !5
  %6 = sdiv i64 %5, 60
  store i64 %6, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %7 = load i64, ptr %2, align 8, !tbaa !5
  %8 = srem i64 %7, 60
  store i64 %8, ptr %4, align 8, !tbaa !5
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = sdiv i64 %9, 10
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = srem i64 %11, 10
  %13 = icmp eq i64 %10, %12
  br i1 %13, label %14, label %20

14:                                               ; preds = %1
  %15 = load i64, ptr %3, align 8, !tbaa !5
  %16 = srem i64 %15, 10
  %17 = load i64, ptr %4, align 8, !tbaa !5
  %18 = sdiv i64 %17, 10
  %19 = icmp eq i64 %16, %18
  br label %20

20:                                               ; preds = %14, %1
  %21 = phi i1 [ false, %1 ], [ %19, %14 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  ret i1 %21
}

; 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", !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 norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef zeroext i1 @_Z7isPalinl(i64 noundef %0) local_unnamed_addr #0 {
  %2 = srem i64 %0, 60
  %3 = sdiv i64 %0, 60
  %4 = sdiv i64 %0, 600
  %.lhs.trunc = trunc nsw i64 %2 to i8
  %5 = srem i8 %.lhs.trunc, 10
  %6 = sdiv i8 %.lhs.trunc, 10
  %.sext = sext i8 %5 to i64
  %7 = icmp eq i64 %4, %.sext
  br i1 %7, label %8, label %11

8:                                                ; preds = %1
  %9 = srem i64 %3, 10
  %.sext7 = sext i8 %6 to i64
  %10 = icmp eq i64 %9, %.sext7
  br label %11

11:                                               ; preds = %8, %1
  %12 = phi i1 [ false, %1 ], [ %10, %8 ]
  ret i1 %12
}

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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,DivRemPairsPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass