; LLVM IR from VastoLorde95/Competitive-Programming :: Codeforces/305 Division 2/Problem C/C.ll (Z3getxx)

; 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"

@m = external dso_local global i64, align 8
@x1 = external dso_local global i64, align 8
@Y1 = external dso_local global i64, align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z3getxx(i64 noundef %0, i64 noundef %1) #0 {
  %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) #2
  store i64 0, ptr %6, align 8, !tbaa !5
  br label %8

8:                                                ; preds = %18, %2
  %9 = load i64, ptr %4, align 8, !tbaa !5
  %10 = load i64, ptr %5, align 8, !tbaa !5
  %11 = icmp ne i64 %9, %10
  br i1 %11, label %12, label %16

12:                                               ; preds = %8
  %13 = load i64, ptr %6, align 8, !tbaa !5
  %14 = load i64, ptr @m, align 8, !tbaa !5
  %15 = icmp slt i64 %13, %14
  br label %16

16:                                               ; preds = %12, %8
  %17 = phi i1 [ false, %8 ], [ %15, %12 ]
  br i1 %17, label %18, label %28

18:                                               ; preds = %16
  %19 = load i64, ptr @x1, align 8, !tbaa !5
  %20 = load i64, ptr %4, align 8, !tbaa !5
  %21 = mul nsw i64 %19, %20
  %22 = load i64, ptr @Y1, align 8, !tbaa !5
  %23 = add nsw i64 %21, %22
  %24 = load i64, ptr @m, align 8, !tbaa !5
  %25 = srem i64 %23, %24
  store i64 %25, ptr %4, align 8, !tbaa !5
  %26 = load i64, ptr %6, align 8, !tbaa !5
  %27 = add nsw i64 %26, 1
  store i64 %27, ptr %6, align 8, !tbaa !5
  br label %8, !llvm.loop !9

28:                                               ; preds = %16
  %29 = load i64, ptr %6, align 8, !tbaa !5
  %30 = load i64, ptr @m, align 8, !tbaa !5
  %31 = icmp eq i64 %29, %30
  br i1 %31, label %32, label %33

32:                                               ; preds = %28
  store i64 -1, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %35

33:                                               ; preds = %28
  %34 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %34, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %35

35:                                               ; preds = %33, %32
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %36 = load i64, ptr %3, align 8
  ret i64 %36
}

; 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 = 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"

@m = external dso_local local_unnamed_addr global i64, align 8
@x1 = external dso_local local_unnamed_addr global i64, align 8
@Y1 = external dso_local local_unnamed_addr global i64, align 8

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_Z3getxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = load i64, ptr @m, align 8
  %4 = icmp ne i64 %0, %1
  %5 = icmp sgt i64 %3, 0
  %6 = select i1 %4, i1 %5, i1 false
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2
  %7 = load i64, ptr @x1, align 8, !tbaa !5
  %8 = load i64, ptr @Y1, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %.lr.ph, %9
  %.012 = phi i64 [ 0, %.lr.ph ], [ %13, %9 ]
  %.0911 = phi i64 [ %0, %.lr.ph ], [ %12, %9 ]
  %10 = mul nsw i64 %7, %.0911
  %11 = add nsw i64 %10, %8
  %12 = srem i64 %11, %3
  %13 = add nuw nsw i64 %.012, 1
  %14 = icmp ne i64 %12, %1
  %15 = icmp slt i64 %13, %3
  %16 = select i1 %14, i1 %15, i1 false
  br i1 %16, label %9, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %9, %2
  %.0.lcssa = phi i64 [ 0, %2 ], [ %13, %9 ]
  %17 = icmp eq i64 %.0.lcssa, %3
  %..0 = select i1 %17, i64 -1, i64 %.0.lcssa
  ret i64 %..0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: 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 = !{!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"}


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