; LLVM IR from DataManagementLab/ScaleStore :: backend/scalestore/utils/ZipfGenerator.ll (ZN10scalestore5utils13ZipfGenerator4zetaEmd)

; 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 double @_ZN10scalestore5utils13ZipfGenerator4zetaEmd(ptr noundef nonnull align 8 dereferenceable(40) %0, i64 noundef %1, double noundef %2) #1 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca double, align 8
  %7 = alloca double, align 8
  %8 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  store double %2, ptr %6, align 8, !tbaa !11
  %9 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store double 0.000000e+00, ptr %7, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 1, ptr %8, align 8, !tbaa !9
  br label %10

10:                                               ; preds = %23, %3
  %11 = load i64, ptr %8, align 8, !tbaa !9
  %12 = load i64, ptr %5, align 8, !tbaa !9
  %13 = icmp ule i64 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %26

15:                                               ; preds = %10
  %16 = load i64, ptr %5, align 8, !tbaa !9
  %17 = uitofp i64 %16 to double
  %18 = fdiv double 1.000000e+00, %17
  %19 = load double, ptr %6, align 8, !tbaa !11
  %20 = call double @pow(double noundef %18, double noundef %19) #3
  %21 = load double, ptr %7, align 8, !tbaa !11
  %22 = fadd double %21, %20
  store double %22, ptr %7, align 8, !tbaa !11
  br label %23

23:                                               ; preds = %15
  %24 = load i64, ptr %8, align 8, !tbaa !9
  %25 = add i64 %24, 1
  store i64 %25, ptr %8, align 8, !tbaa !9
  br label %10, !llvm.loop !13

26:                                               ; preds = %14
  %27 = load double, ptr %7, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret double %27
}

; Function Attrs: nounwind
declare double @pow(double noundef, double noundef) #2

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 "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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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 nounwind memory(write) uwtable
define dso_local noundef double @_ZN10scalestore5utils13ZipfGenerator4zetaEmd(ptr nocapture noundef nonnull readnone align 8 dereferenceable(40) %0, i64 noundef %1, double noundef %2) local_unnamed_addr #0 align 2 {
  %.not9 = icmp eq i64 %1, 0
  br i1 %.not9, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %4 = uitofp i64 %1 to double
  %5 = fdiv double 1.000000e+00, %4
  br label %6

._crit_edge:                                      ; preds = %6, %3
  %.07.lcssa = phi double [ 0.000000e+00, %3 ], [ %8, %6 ]
  ret double %.07.lcssa

6:                                                ; preds = %.lr.ph, %6
  %.011 = phi i64 [ 1, %.lr.ph ], [ %9, %6 ]
  %.0710 = phi double [ 0.000000e+00, %.lr.ph ], [ %8, %6 ]
  %7 = tail call double @pow(double noundef %5, double noundef %2) #2
  %8 = fadd double %.0710, %7
  %9 = add i64 %.011, 1
  %.not = icmp ugt i64 %9, %1
  br i1 %.not, label %._crit_edge, label %6, !llvm.loop !5
}

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

attributes #0 = { mustprogress nofree nounwind memory(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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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