; LLVM IR from kala13x/libxutils :: src/sys (xtime)

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

; Function Attrs: nounwind uwtable
define dso_local i32 @XTime_GetLeapYear(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !5
  %4 = load i32, ptr %2, align 4, !tbaa !5
  %5 = srem i32 %4, 4
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %7, label %20

7:                                                ; preds = %1
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = srem i32 %8, 100
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %11, label %18

11:                                               ; preds = %7
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = srem i32 %12, 400
  %14 = icmp eq i32 %13, 0
  br i1 %14, label %15, label %16

15:                                               ; preds = %11
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %17

16:                                               ; preds = %11
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %16, %15
  br label %19

18:                                               ; preds = %7
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %19

19:                                               ; preds = %18, %17
  br label %21

20:                                               ; preds = %1
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %20, %19
  %22 = load i32, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %22
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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/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 range(i32 0, 2) i32 @XTime_GetLeapYear(i32 noundef %0) local_unnamed_addr #0 {
  %2 = and i32 %0, 3
  %3 = icmp eq i32 %2, 0
  br i1 %3, label %4, label %10

4:                                                ; preds = %1
  %5 = srem i32 %0, 100
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %7, label %10

7:                                                ; preds = %4
  %8 = srem i32 %0, 400
  %9 = icmp eq i32 %8, 0
  %. = zext i1 %9 to i32
  br label %10

10:                                               ; preds = %1, %4, %7
  %.0 = phi i32 [ %., %7 ], [ 1, %4 ], [ 0, %1 ]
  ret i32 %.0
}

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: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass