; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ/1076（数学题）.ll (Z1fii)

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

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z1fii(i32 noundef %0, i32 noundef %1) #1 {
  %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
  br label %6

6:                                                ; preds = %32, %2
  br label %7

7:                                                ; preds = %6
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = srem i32 %8, 4
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %11, label %15

11:                                               ; preds = %7
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = srem i32 %12, 100
  %14 = icmp ne i32 %13, 0
  br i1 %14, label %19, label %15

15:                                               ; preds = %11, %7
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = srem i32 %16, 400
  %18 = icmp eq i32 %17, 0
  br i1 %18, label %19, label %29

19:                                               ; preds = %15, %11
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %5, align 4, !tbaa !5
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = icmp eq i32 %22, %23
  br i1 %24, label %25, label %26

25:                                               ; preds = %19
  br label %33

26:                                               ; preds = %19
  %27 = load i32, ptr %3, align 4, !tbaa !5
  %28 = add nsw i32 %27, 4
  store i32 %28, ptr %3, align 4, !tbaa !5
  br label %32

29:                                               ; preds = %15
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %3, align 4, !tbaa !5
  br label %32

32:                                               ; preds = %29, %26
  br label %6, !llvm.loop !9

33:                                               ; preds = %25
  %34 = load i32, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %34
}

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

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 = { 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"}
!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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i32 @_Z1fii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  br label %3

3:                                                ; preds = %12, %2
  %.09 = phi i32 [ %0, %2 ], [ %13, %12 ]
  %.0 = phi i32 [ 0, %2 ], [ %.1, %12 ]
  %4 = and i32 %.09, 3
  %5 = icmp eq i32 %4, 0
  %6 = srem i32 %.09, 100
  %.not = icmp ne i32 %6, 0
  %or.cond.not15 = and i1 %5, %.not
  %7 = srem i32 %.09, 400
  %8 = icmp eq i32 %7, 0
  %or.cond13 = or i1 %8, %or.cond.not15
  br i1 %or.cond13, label %9, label %12

9:                                                ; preds = %3
  %10 = add nsw i32 %.0, 1
  %11 = icmp eq i32 %10, %1
  br i1 %11, label %14, label %12

12:                                               ; preds = %3, %9
  %.sink = phi i32 [ 4, %9 ], [ 1, %3 ]
  %.1 = phi i32 [ %10, %9 ], [ %.0, %3 ]
  %13 = add nsw i32 %.09, %.sink
  br label %3, !llvm.loop !5

14:                                               ; preds = %9
  ret i32 %.09
}

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: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass