; LLVM IR from tangjz/acm-icpc :: self_training/2015-01-29/J.ll (Z7isprimev)

; 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"

@x = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z7isprimev() #0 {
  %1 = alloca i1, align 1
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  store i32 2, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %5 = load i32, ptr @x, align 4, !tbaa !5
  %6 = sitofp i32 %5 to double
  %7 = call double @sqrt(double noundef %6) #3
  %8 = fptosi double %7 to i32
  store i32 %8, ptr %3, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %21, %0
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = icmp sle i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  store i32 2, ptr %4, align 4
  br label %24

14:                                               ; preds = %9
  %15 = load i32, ptr @x, align 4, !tbaa !5
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = srem i32 %15, %16
  %18 = icmp eq i32 %17, 0
  br i1 %18, label %19, label %20

19:                                               ; preds = %14
  store i1 false, ptr %1, align 1
  store i32 1, ptr %4, align 4
  br label %24

20:                                               ; preds = %14
  br label %21

21:                                               ; preds = %20
  %22 = load i32, ptr %2, align 4, !tbaa !5
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %2, align 4, !tbaa !5
  br label %9, !llvm.loop !9

24:                                               ; preds = %19, %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  %25 = load i32, ptr %4, align 4
  switch i32 %25, label %29 [
    i32 2, label %26
    i32 1, label %27
  ]

26:                                               ; preds = %24
  store i1 true, ptr %1, align 1
  br label %27

27:                                               ; preds = %26, %24
  %28 = load i1, ptr %1, align 1
  ret i1 %28

29:                                               ; preds = %24
  unreachable
}

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

; Function Attrs: nounwind
declare double @sqrt(double 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 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 "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 = !{!"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"

@x = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree nounwind memory(readwrite, argmem: write, inaccessiblemem: write) uwtable
define dso_local noundef zeroext i1 @_Z7isprimev() local_unnamed_addr #0 {
  %1 = load i32, ptr @x, align 4, !tbaa !5
  %2 = sitofp i32 %1 to double
  %3 = tail call double @sqrt(double noundef %2) #2
  %4 = fptosi double %3 to i32
  %.not7 = icmp slt i32 %4, 2
  br i1 %.not7, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0
  %5 = load i32, ptr @x, align 4, !tbaa !5
  %6 = and i32 %5, 1
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %._crit_edge, label %.lr.ph13

.lr.ph13:                                         ; preds = %.lr.ph, %8
  %.06812 = phi i32 [ %9, %8 ], [ 2, %.lr.ph ]
  %exitcond = icmp eq i32 %.06812, %4
  br i1 %exitcond, label %._crit_edge.loopexit, label %8, !llvm.loop !9

8:                                                ; preds = %.lr.ph13
  %9 = add nuw i32 %.06812, 1
  %10 = srem i32 %5, %9
  %11 = icmp eq i32 %10, 0
  br i1 %11, label %._crit_edge.loopexit, label %.lr.ph13, !llvm.loop !9

._crit_edge.loopexit:                             ; preds = %.lr.ph13, %8
  %.not.le = icmp sge i32 %.06812, %4
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %.lr.ph, %0
  %.not.lcssa = phi i1 [ true, %0 ], [ false, %.lr.ph ], [ %.not.le, %._crit_edge.loopexit ]
  ret i1 %.not.lcssa
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(write)
declare double @sqrt(double noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree nounwind memory(readwrite, argmem: write, inaccessiblemem: write) 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 = { mustprogress nofree nounwind willreturn memory(write) "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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass