; LLVM IR from tangjz/acm-icpc :: codeforces/complete/584D.ll (Z7isprimei)

; 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 nounwind uwtable
define dso_local noundef zeroext i1 @_Z7isprimei(i32 noundef %0) #0 {
  %2 = alloca i1, align 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
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp slt i32 %6, 2
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i1 false, ptr %2, align 1
  br label %33

9:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 2, ptr %4, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %27, %9
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = mul nsw i64 %12, %14
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = icmp sle i64 %15, %17
  br i1 %18, label %20, label %19

19:                                               ; preds = %10
  store i32 2, ptr %5, align 4
  br label %30

20:                                               ; preds = %10
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = srem i32 %21, %22
  %24 = icmp eq i32 %23, 0
  br i1 %24, label %25, label %26

25:                                               ; preds = %20
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %30

26:                                               ; preds = %20
  br label %27

27:                                               ; preds = %26
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %4, align 4, !tbaa !5
  br label %10, !llvm.loop !9

30:                                               ; preds = %25, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %31 = load i32, ptr %5, align 4
  switch i32 %31, label %35 [
    i32 2, label %32
    i32 1, label %33
  ]

32:                                               ; preds = %30
  store i1 true, ptr %2, align 1
  br label %33

33:                                               ; preds = %32, %30, %8
  %34 = load i1, ptr %2, align 1
  ret i1 %34

35:                                               ; preds = %30
  unreachable
}

; 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 = !{!"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 zeroext i1 @_Z7isprimei(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp slt i32 %0, 2
  br i1 %2, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %1
  %3 = zext nneg i32 %0 to i64
  %.not11 = icmp ult i32 %0, 4
  br i1 %.not11, label %.loopexit, label %.lr.ph

4:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %5 = mul nuw nsw i64 %indvars.iv.next, %indvars.iv.next
  %.not = icmp ugt i64 %5, %3
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.preheader, %4
  %indvars.iv = phi i64 [ %indvars.iv.next, %4 ], [ 2, %.preheader ]
  %6 = trunc nuw nsw i64 %indvars.iv to i32
  %7 = urem i32 %0, %6
  %.not16 = icmp ne i32 %7, 0
  br i1 %.not16, label %4, label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %4, %.preheader, %1
  %.1 = phi i1 [ false, %1 ], [ true, %.preheader ], [ %.not16, %4 ], [ %.not16, %.lr.ph ]
  ret i1 %.1
}

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: ConstraintEliminationPass,CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass