; LLVM IR from Farama-Foundation/stable-retro :: third-party/gtest/googletest/samples/sample1.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: 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: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z7IsPrimei(i32 noundef %0) #1 {
  %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 sle i32 %6, 1
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i1 false, ptr %2, align 1
  br label %37

9:                                                ; preds = %1
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = srem i32 %10, 2
  %12 = icmp eq i32 %11, 0
  br i1 %12, label %13, label %16

13:                                               ; preds = %9
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = icmp eq i32 %14, 2
  store i1 %15, ptr %2, align 1
  br label %37

16:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 3, ptr %4, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %31, %16
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = sdiv i32 %19, %20
  %22 = icmp sgt i32 %18, %21
  br i1 %22, label %23, label %24

23:                                               ; preds = %17
  store i32 2, ptr %5, align 4
  br label %34

24:                                               ; preds = %17
  %25 = load i32, ptr %3, align 4, !tbaa !5
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = srem i32 %25, %26
  %28 = icmp eq i32 %27, 0
  br i1 %28, label %29, label %30

29:                                               ; preds = %24
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %34

30:                                               ; preds = %24
  br label %31

31:                                               ; preds = %30
  %32 = load i32, ptr %4, align 4, !tbaa !5
  %33 = add nsw i32 %32, 2
  store i32 %33, ptr %4, align 4, !tbaa !5
  br label %17, !llvm.loop !9

34:                                               ; preds = %29, %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %35 = load i32, ptr %5, align 4
  switch i32 %35, label %39 [
    i32 2, label %36
    i32 1, label %37
  ]

36:                                               ; preds = %34
  store i1 true, ptr %2, align 1
  br label %37

37:                                               ; preds = %36, %34, %13, %8
  %38 = load i1, ptr %2, align 1
  ret i1 %38

39:                                               ; preds = %34
  unreachable
}

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 zeroext i1 @_Z7IsPrimei(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp slt i32 %0, 2
  br i1 %2, label %.loopexit, label %3

3:                                                ; preds = %1
  %4 = and i32 %0, 1
  %5 = icmp eq i32 %4, 0
  br i1 %5, label %7, label %.preheader

.preheader:                                       ; preds = %3
  %6 = icmp ult i32 %0, 9
  br i1 %6, label %.loopexit, label %.lr.ph

7:                                                ; preds = %3
  %8 = icmp eq i32 %0, 2
  br label %.loopexit

9:                                                ; preds = %.lr.ph
  %10 = add nuw nsw i32 %.01013, 2
  %11 = udiv i32 %0, %10
  %12 = icmp ugt i32 %10, %11
  br i1 %12, label %.loopexit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.preheader, %9
  %.01013 = phi i32 [ %10, %9 ], [ 3, %.preheader ]
  %13 = urem i32 %0, %.01013
  %.not = icmp ne i32 %13, 0
  br i1 %.not, label %9, label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %9, %.preheader, %1, %7
  %.1 = phi i1 [ %8, %7 ], [ false, %1 ], [ true, %.preheader ], [ %.not, %9 ], [ %.not, %.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,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass