; LLVM IR from ravireddy07/cpp-book :: src/Common-Problems/NumOfDivisors.ll (Z7isPrimex)

; 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 zeroext i1 @_Z7isPrimex(i64 noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i32, align 4
  store i64 %0, ptr %3, align 8, !tbaa !5
  %7 = load i64, ptr %3, align 8, !tbaa !5
  %8 = icmp eq i64 %7, 2
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store i1 true, ptr %2, align 1
  br label %41

10:                                               ; preds = %1
  %11 = load i64, ptr %3, align 8, !tbaa !5
  %12 = icmp slt i64 %11, 2
  br i1 %12, label %17, label %13

13:                                               ; preds = %10
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = and i64 %14, 1
  %16 = icmp eq i64 %15, 0
  br i1 %16, label %17, label %18

17:                                               ; preds = %13, %10
  store i1 false, ptr %2, align 1
  br label %41

18:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  %19 = load i64, ptr %3, align 8, !tbaa !5
  %20 = call noundef double @_ZSt4sqrtIxEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_(i64 noundef %19)
  %21 = fptosi double %20 to i64
  store i64 %21, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 3, ptr %5, align 8, !tbaa !5
  br label %22

22:                                               ; preds = %34, %18
  %23 = load i64, ptr %5, align 8, !tbaa !5
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = icmp sle i64 %23, %24
  br i1 %25, label %27, label %26

26:                                               ; preds = %22
  store i32 2, ptr %6, align 4
  br label %37

27:                                               ; preds = %22
  %28 = load i64, ptr %3, align 8, !tbaa !5
  %29 = load i64, ptr %5, align 8, !tbaa !5
  %30 = srem i64 %28, %29
  %31 = icmp eq i64 %30, 0
  br i1 %31, label %32, label %33

32:                                               ; preds = %27
  store i1 false, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %37

33:                                               ; preds = %27
  br label %34

34:                                               ; preds = %33
  %35 = load i64, ptr %5, align 8, !tbaa !5
  %36 = add nsw i64 %35, 2
  store i64 %36, ptr %5, align 8, !tbaa !5
  br label %22, !llvm.loop !9

37:                                               ; preds = %32, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  %38 = load i32, ptr %6, align 4
  switch i32 %38, label %40 [
    i32 2, label %39
  ]

39:                                               ; preds = %37
  store i1 true, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %40

40:                                               ; preds = %39, %37
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %41

41:                                               ; preds = %40, %17, %9
  %42 = load i1, ptr %2, align 1
  ret i1 %42
}

; 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 @_ZSt4sqrtIxEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_(i64 noundef) #2

; 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 = { 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z7isPrimex(i64 noundef %0) local_unnamed_addr #0 {
  %2 = icmp eq i64 %0, 2
  br i1 %2, label %.critedge, label %3

3:                                                ; preds = %1
  %4 = icmp slt i64 %0, 2
  %5 = and i64 %0, 1
  %6 = icmp eq i64 %5, 0
  %or.cond = or i1 %4, %6
  br i1 %or.cond, label %.critedge, label %7

7:                                                ; preds = %3
  %8 = tail call noundef double @_ZSt4sqrtIxEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_(i64 noundef %0)
  %9 = fptosi double %8 to i64
  %.not14 = icmp slt i64 %9, 3
  br i1 %.not14, label %.critedge, label %.lr.ph

.lr.ph:                                           ; preds = %7, %.lr.ph
  %.01015 = phi i64 [ %11, %.lr.ph ], [ 3, %7 ]
  %10 = urem i64 %0, %.01015
  %.not18 = icmp ne i64 %10, 0
  %11 = add nuw nsw i64 %.01015, 2
  %.not = icmp sle i64 %11, %9
  %or.cond19.not = select i1 %.not18, i1 %.not, i1 false
  br i1 %or.cond19.not, label %.lr.ph, label %.critedge, !llvm.loop !5

.critedge:                                        ; preds = %.lr.ph, %7, %3, %1
  %.2 = phi i1 [ true, %1 ], [ false, %3 ], [ true, %7 ], [ %.not18, %.lr.ph ]
  ret i1 %.2
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt4sqrtIxEN9__gnu_cxx11__enable_ifIXsr12__is_integerIT_EE7__valueEdE6__typeES2_(i64 noundef) local_unnamed_addr #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 = { 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" }

!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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass