; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ/2012.ll (Z5primei)

; 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 uwtable
define dso_local noundef i32 @_Z5primei(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = icmp sle i32 %7, 1
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i32 0, ptr %2, align 4
  br label %35

10:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = call noundef double @_ZSt4sqrtIiEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_(i32 noundef %11)
  %13 = fadd double %12, 5.000000e-01
  %14 = call double @llvm.floor.f64(double %13)
  %15 = fptosi double %14 to i32
  store i32 %15, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 2, ptr %5, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %28, %10
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = icmp sle i32 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  store i32 2, ptr %6, align 4
  br label %31

21:                                               ; preds = %16
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = load i32, ptr %5, align 4, !tbaa !5
  %24 = srem i32 %22, %23
  %25 = icmp eq i32 %24, 0
  br i1 %25, label %26, label %27

26:                                               ; preds = %21
  store i32 0, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %31

27:                                               ; preds = %21
  br label %28

28:                                               ; preds = %27
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %5, align 4, !tbaa !5
  br label %16, !llvm.loop !9

31:                                               ; preds = %26, %20
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  %32 = load i32, ptr %6, align 4
  switch i32 %32, label %34 [
    i32 2, label %33
  ]

33:                                               ; preds = %31
  store i32 1, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %34

34:                                               ; preds = %33, %31
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  br label %35

35:                                               ; preds = %34, %9
  %36 = load i32, ptr %2, align 4
  ret i32 %36
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt4sqrtIiEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_(i32 noundef) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.floor.f64(double) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { mustprogress 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 = { inlinehint 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 #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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 nounwind uwtable
define dso_local noundef range(i32 0, 2) i32 @_Z5primei(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp slt i32 %0, 2
  br i1 %2, label %._crit_edge, label %3

3:                                                ; preds = %1
  %4 = tail call noundef double @_ZSt4sqrtIiEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_(i32 noundef %0)
  %5 = fadd double %4, 5.000000e-01
  %6 = tail call double @llvm.floor.f64(double %5)
  %7 = fptosi double %6 to i32
  %.not12 = icmp slt i32 %7, 2
  br i1 %.not12, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %8 = and i32 %0, 1
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %._crit_edge, label %.lr.ph18

.lr.ph18:                                         ; preds = %.lr.ph.preheader, %.lr.ph
  %.091317 = phi i32 [ %10, %.lr.ph ], [ 2, %.lr.ph.preheader ]
  %exitcond = icmp eq i32 %.091317, %7
  br i1 %exitcond, label %._crit_edge.loopexit.loopexit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.lr.ph18
  %10 = add nuw i32 %.091317, 1
  %11 = urem i32 %0, %10
  %12 = icmp eq i32 %11, 0
  br i1 %12, label %._crit_edge.loopexit.loopexit, label %.lr.ph18, !llvm.loop !5

._crit_edge.loopexit.loopexit:                    ; preds = %.lr.ph, %.lr.ph18
  %.not.le = icmp sge i32 %.091317, %7
  %13 = zext i1 %.not.le to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.preheader, %._crit_edge.loopexit.loopexit, %3, %1
  %.2 = phi i32 [ 0, %1 ], [ 1, %3 ], [ 0, %.lr.ph.preheader ], [ %13, %._crit_edge.loopexit.loopexit ]
  ret i32 %.2
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt4sqrtIiEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_(i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.floor.f64(double) #2

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 = { inlinehint 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 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass