; LLVM IR from codee-com/open-catalog :: Checks/PWR046/benchmark (example)

; 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: nounwind uwtable
define dso_local void @compute_harmonic_mean_between_pairs(i32 noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3) #0 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %34, %4
  %11 = load i32, ptr %9, align 4, !tbaa !5
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %37

15:                                               ; preds = %10
  %16 = load ptr, ptr %6, align 8, !tbaa !9
  %17 = load i32, ptr %9, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds double, ptr %16, i64 %18
  %20 = load double, ptr %19, align 8, !tbaa !11
  %21 = fdiv double 1.000000e+00, %20
  %22 = load ptr, ptr %7, align 8, !tbaa !9
  %23 = load i32, ptr %9, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds double, ptr %22, i64 %24
  %26 = load double, ptr %25, align 8, !tbaa !11
  %27 = fdiv double 1.000000e+00, %26
  %28 = fadd double %21, %27
  %29 = fdiv double 2.000000e+00, %28
  %30 = load ptr, ptr %8, align 8, !tbaa !9
  %31 = load i32, ptr %9, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds double, ptr %30, i64 %32
  store double %29, ptr %33, align 8, !tbaa !11
  br label %34

34:                                               ; preds = %15
  %35 = load i32, ptr %9, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %9, align 4, !tbaa !5
  br label %10, !llvm.loop !13

37:                                               ; preds = %14
  ret void
}

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

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

attributes #0 = { 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 }

!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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @compute_harmonic_mean_between_pairs(i32 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2, ptr nocapture noundef writeonly %3) local_unnamed_addr #0 {
  %5 = ptrtoint ptr %2 to i64
  %6 = ptrtoint ptr %1 to i64
  %7 = ptrtoint ptr %3 to i64
  %8 = icmp sgt i32 %0, 0
  br i1 %8, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %4
  %wide.trip.count = zext nneg i32 %0 to i64
  %min.iters.check = icmp eq i32 %0, 1
  br i1 %min.iters.check, label %.lr.ph.preheader12, label %vector.memcheck

.lr.ph.preheader12:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 1
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader12
  %9 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.ph
  %10 = load double, ptr %9, align 8, !tbaa !5
  %11 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.ph
  %12 = load double, ptr %11, align 8, !tbaa !5
  %13 = insertelement <2 x double> poison, double %10, i64 0
  %14 = insertelement <2 x double> %13, double %12, i64 1
  %15 = fdiv <2 x double> <double 1.000000e+00, double 1.000000e+00>, %14
  %shift.prol = shufflevector <2 x double> %15, <2 x double> poison, <2 x i32> <i32 1, i32 poison>
  %16 = fadd <2 x double> %15, %shift.prol
  %17 = extractelement <2 x double> %16, i64 0
  %18 = fdiv double 2.000000e+00, %17
  %19 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.ph
  store double %18, ptr %19, align 8, !tbaa !5
  %indvars.iv.next.prol = or disjoint i64 %indvars.iv.ph, 1
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader12
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader12 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %20 = add nsw i64 %wide.trip.count, -1
  %21 = icmp eq i64 %indvars.iv.ph, %20
  br i1 %21, label %._crit_edge, label %.lr.ph

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %22 = sub i64 %7, %6
  %diff.check = icmp ult i64 %22, 16
  %23 = sub i64 %7, %5
  %diff.check10 = icmp ult i64 %23, 16
  %conflict.rdx = or i1 %diff.check, %diff.check10
  br i1 %conflict.rdx, label %.lr.ph.preheader12, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 2147483646
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %24 = getelementptr inbounds double, ptr %1, i64 %index
  %wide.load = load <2 x double>, ptr %24, align 8, !tbaa !5
  %25 = fdiv <2 x double> <double 1.000000e+00, double 1.000000e+00>, %wide.load
  %26 = getelementptr inbounds double, ptr %2, i64 %index
  %wide.load11 = load <2 x double>, ptr %26, align 8, !tbaa !5
  %27 = fdiv <2 x double> <double 1.000000e+00, double 1.000000e+00>, %wide.load11
  %28 = fadd <2 x double> %25, %27
  %29 = fdiv <2 x double> <double 2.000000e+00, double 2.000000e+00>, %28
  %30 = getelementptr inbounds double, ptr %3, i64 %index
  store <2 x double> %29, ptr %30, align 8, !tbaa !5
  %index.next = add nuw i64 %index, 2
  %31 = icmp eq i64 %index.next, %n.vec
  br i1 %31, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader12

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %4
  ret void

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %32 = getelementptr inbounds double, ptr %1, i64 %indvars.iv
  %33 = load double, ptr %32, align 8, !tbaa !5
  %34 = getelementptr inbounds double, ptr %2, i64 %indvars.iv
  %35 = load double, ptr %34, align 8, !tbaa !5
  %36 = insertelement <2 x double> poison, double %33, i64 0
  %37 = insertelement <2 x double> %36, double %35, i64 1
  %38 = fdiv <2 x double> <double 1.000000e+00, double 1.000000e+00>, %37
  %shift = shufflevector <2 x double> %38, <2 x double> poison, <2 x i32> <i32 1, i32 poison>
  %39 = fadd <2 x double> %38, %shift
  %40 = extractelement <2 x double> %39, i64 0
  %41 = fdiv double 2.000000e+00, %40
  %42 = getelementptr inbounds double, ptr %3, i64 %indvars.iv
  store double %41, ptr %42, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %43 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.next
  %44 = load double, ptr %43, align 8, !tbaa !5
  %45 = getelementptr inbounds double, ptr %2, i64 %indvars.iv.next
  %46 = load double, ptr %45, align 8, !tbaa !5
  %47 = insertelement <2 x double> poison, double %44, i64 0
  %48 = insertelement <2 x double> %47, double %46, i64 1
  %49 = fdiv <2 x double> <double 1.000000e+00, double 1.000000e+00>, %48
  %shift.1 = shufflevector <2 x double> %49, <2 x double> poison, <2 x i32> <i32 1, i32 poison>
  %50 = fadd <2 x double> %49, %shift.1
  %51 = extractelement <2 x double> %50, i64 0
  %52 = fdiv double 2.000000e+00, %51
  %53 = getelementptr inbounds double, ptr %3, i64 %indvars.iv.next
  store double %52, ptr %53, align 8, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %exitcond.not.1 = icmp eq i64 %indvars.iv.next.1, %wide.trip.count
  br i1 %exitcond.not.1, label %._crit_edge, label %.lr.ph, !llvm.loop !13
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !11}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SLPVectorizerPass,SROAPass,SimplifyCFGPass,VectorCombinePass