; LLVM IR from upupming/algorithm :: kick-start/2021/RoundB/C. naive.ll (Z5solvev)

; 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"

@primes = external dso_local global [1000000010 x i64], align 16
@cnt = external dso_local global i64, align 8

; 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
declare dso_local noundef zeroext i1 @_Z5validi(i32 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z5solvev() #1 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  store i32 0, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #2
  %4 = load i64, ptr @cnt, align 8, !tbaa !9
  %5 = sub nsw i64 %4, 2
  %6 = trunc i64 %5 to i32
  store i32 %6, ptr %2, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %24, %0
  %8 = load i32, ptr %1, align 4, !tbaa !5
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = icmp slt i32 %8, %9
  br i1 %10, label %11, label %25

11:                                               ; preds = %7
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %12 = load i32, ptr %1, align 4, !tbaa !5
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = add nsw i32 %12, %13
  %15 = add nsw i32 %14, 1
  %16 = ashr i32 %15, 1
  store i32 %16, ptr %3, align 4, !tbaa !5
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = call noundef zeroext i1 @_Z5validi(i32 noundef %17)
  br i1 %18, label %19, label %21

19:                                               ; preds = %11
  %20 = load i32, ptr %3, align 4, !tbaa !5
  store i32 %20, ptr %1, align 4, !tbaa !5
  br label %24

21:                                               ; preds = %11
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = sub nsw i32 %22, 1
  store i32 %23, ptr %2, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %21, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  br label %7, !llvm.loop !11

25:                                               ; preds = %7
  %26 = load i32, ptr %1, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [1000000010 x i64], ptr @primes, i64 0, i64 %27
  %29 = load i64, ptr %28, align 8, !tbaa !9
  %30 = load i32, ptr %1, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [1000000010 x i64], ptr @primes, i64 0, i64 %32
  %34 = load i64, ptr %33, align 8, !tbaa !9
  %35 = mul nsw i64 %29, %34
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  ret i64 %35
}

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 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

@primes = external dso_local local_unnamed_addr global [1000000010 x i64], align 16
@cnt = external dso_local local_unnamed_addr global i64, align 8

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z5validi(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z5solvev() local_unnamed_addr #0 {
  %1 = load i64, ptr @cnt, align 8, !tbaa !5
  %2 = trunc i64 %1 to i32
  %3 = add i32 %2, -2
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.012 = phi i32 [ %.1, %.lr.ph ], [ 0, %0 ]
  %.0911 = phi i32 [ %.110, %.lr.ph ], [ %3, %0 ]
  %5 = add nuw nsw i32 %.012, 1
  %6 = add nuw nsw i32 %5, %.0911
  %7 = lshr i32 %6, 1
  %8 = tail call noundef zeroext i1 @_Z5validi(i32 noundef %7)
  %9 = add nsw i32 %7, -1
  %.110 = select i1 %8, i32 %.0911, i32 %9
  %.1 = select i1 %8, i32 %7, i32 %.012
  %10 = icmp slt i32 %.1, %.110
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %0
  %.0.lcssa = phi i32 [ 0, %0 ], [ %.1, %.lr.ph ]
  %11 = zext nneg i32 %.0.lcssa to i64
  %12 = getelementptr inbounds [1000000010 x i64], ptr @primes, i64 0, i64 %11
  %13 = load i64, ptr %12, align 8, !tbaa !5
  %14 = add nuw nsw i32 %.0.lcssa, 1
  %15 = zext nneg i32 %14 to i64
  %16 = getelementptr inbounds [1000000010 x i64], ptr @primes, i64 0, i64 %15
  %17 = load i64, ptr %16, align 8, !tbaa !5
  %18 = mul nsw i64 %17, %13
  ret i64 %18
}

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" }

!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"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass