; LLVM IR from upupming/algorithm :: codeforces/1243-C.ll (Z5findQxx)

; 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"

@.str = external hidden unnamed_addr constant [10 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [74 x i8], align 1
@__PRETTY_FUNCTION__._Z5findQxx = external hidden unnamed_addr constant [38 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z5findQxx(i64 noundef %0, i64 noundef %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %8 = load i64, ptr %5, align 8, !tbaa !5
  store i64 %8, ptr %6, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %13, %2
  %10 = load i64, ptr %6, align 8, !tbaa !5
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = icmp slt i64 %10, %11
  br i1 %12, label %13, label %17

13:                                               ; preds = %9
  %14 = load i64, ptr %5, align 8, !tbaa !5
  %15 = load i64, ptr %6, align 8, !tbaa !5
  %16 = mul nsw i64 %15, %14
  store i64 %16, ptr %6, align 8, !tbaa !5
  br label %9, !llvm.loop !9

17:                                               ; preds = %9
  %18 = load i64, ptr %6, align 8, !tbaa !5
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = icmp eq i64 %18, %19
  br i1 %20, label %21, label %23

21:                                               ; preds = %17
  %22 = load i64, ptr %5, align 8, !tbaa !5
  store i64 %22, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %31

23:                                               ; preds = %17
  %24 = load i64, ptr %6, align 8, !tbaa !5
  %25 = load i64, ptr %4, align 8, !tbaa !5
  %26 = icmp sgt i64 %24, %25
  br i1 %26, label %27, label %28

27:                                               ; preds = %23
  br label %30

28:                                               ; preds = %23
  call void @__assert_fail(ptr noundef @.str, ptr noundef @.str.1, i32 noundef 22, ptr noundef @__PRETTY_FUNCTION__._Z5findQxx) #4
  unreachable

29:                                               ; No predecessors!
  br label %30

30:                                               ; preds = %29, %27
  store i64 1, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %31

31:                                               ; preds = %30, %21
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %32 = load i64, ptr %3, align 8
  ret i64 %32
}

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { noreturn nounwind "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 #3 = { nounwind }
attributes #4 = { noreturn 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 = distinct !{!9, !10}
!10 = !{!"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"

@.str = external hidden unnamed_addr constant [10 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [74 x i8], align 1
@__PRETTY_FUNCTION__._Z5findQxx = external hidden unnamed_addr constant [38 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z5findQxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = icmp slt i64 %1, %0
  br i1 %3, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.013 = phi i64 [ %4, %.lr.ph ], [ %1, %2 ]
  %4 = mul nsw i64 %.013, %1
  %5 = icmp slt i64 %4, %0
  br i1 %5, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.0.lcssa = phi i64 [ %1, %2 ], [ %4, %.lr.ph ]
  %6 = icmp eq i64 %.0.lcssa, %0
  br i1 %6, label %10, label %7

7:                                                ; preds = %._crit_edge
  %8 = icmp sgt i64 %.0.lcssa, %0
  br i1 %8, label %10, label %9

9:                                                ; preds = %7
  tail call void @__assert_fail(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 22, ptr noundef nonnull @__PRETTY_FUNCTION__._Z5findQxx) #2
  unreachable

10:                                               ; preds = %7, %._crit_edge
  %.011 = phi i64 [ %1, %._crit_edge ], [ 1, %7 ]
  ret i64 %.011
}

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #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 = { noreturn nounwind "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 #2 = { noreturn 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass