; LLVM IR from ekoontz/graphlab :: src/graphlab/extern/metis/libmetis/mfm.ll_libmetis (Compute2WayHLoadImbalanceVec)

; 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 speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @libmetis__Compute2WayHLoadImbalanceVec(i64 noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3) #2 {
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  store i64 %0, ptr %5, align 8, !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 8, ptr %9) #3
  store i64 0, ptr %9, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %35, %4
  %11 = load i64, ptr %9, align 8, !tbaa !5
  %12 = load i64, ptr %5, align 8, !tbaa !5
  %13 = icmp slt i64 %11, %12
  br i1 %13, label %14, label %38

14:                                               ; preds = %10
  %15 = load ptr, ptr %7, align 8, !tbaa !9
  %16 = getelementptr inbounds float, ptr %15, i64 0
  %17 = load float, ptr %16, align 4, !tbaa !11
  %18 = load ptr, ptr %6, align 8, !tbaa !9
  %19 = load i64, ptr %9, align 8, !tbaa !5
  %20 = getelementptr inbounds float, ptr %18, i64 %19
  %21 = load float, ptr %20, align 4, !tbaa !11
  %22 = fsub float %17, %21
  %23 = fpext float %22 to double
  %24 = call double @llvm.fabs.f64(double %23)
  %25 = load ptr, ptr %7, align 8, !tbaa !9
  %26 = getelementptr inbounds float, ptr %25, i64 0
  %27 = load float, ptr %26, align 4, !tbaa !11
  %28 = fpext float %27 to double
  %29 = fdiv double %24, %28
  %30 = fadd double 1.000000e+00, %29
  %31 = fptrunc double %30 to float
  %32 = load ptr, ptr %8, align 8, !tbaa !9
  %33 = load i64, ptr %9, align 8, !tbaa !5
  %34 = getelementptr inbounds float, ptr %32, i64 %33
  store float %31, ptr %34, align 4, !tbaa !11
  br label %35

35:                                               ; preds = %14
  %36 = load i64, ptr %9, align 8, !tbaa !5
  %37 = add nsw i64 %36, 1
  store i64 %37, ptr %9, align 8, !tbaa !5
  br label %10, !llvm.loop !13

38:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { 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 #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 = !{!"long", !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 = !{!"float", !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 @libmetis__Compute2WayHLoadImbalanceVec(i64 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2, ptr nocapture noundef writeonly %3) local_unnamed_addr #0 {
  %5 = icmp sgt i64 %0, 0
  br i1 %5, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %4
  %min.iters.check = icmp ult i64 %0, 4
  br i1 %min.iters.check, label %.lr.ph.preheader14, label %vector.memcheck

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %6 = shl i64 %0, 2
  %scevgep = getelementptr i8, ptr %3, i64 %6
  %scevgep9 = getelementptr i8, ptr %2, i64 4
  %scevgep10 = getelementptr i8, ptr %1, i64 %6
  %bound0 = icmp ugt ptr %scevgep9, %3
  %bound1 = icmp ugt ptr %scevgep, %2
  %found.conflict = and i1 %bound0, %bound1
  %bound011 = icmp ugt ptr %scevgep10, %3
  %bound112 = icmp ugt ptr %scevgep, %1
  %found.conflict13 = and i1 %bound011, %bound112
  %conflict.rdx = or i1 %found.conflict, %found.conflict13
  br i1 %conflict.rdx, label %.lr.ph.preheader14, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %0, 9223372036854775804
  %7 = load float, ptr %2, align 4, !tbaa !5, !alias.scope !9
  %broadcast.splatinsert = insertelement <4 x float> poison, float %7, i64 0
  %broadcast.splat = shufflevector <4 x float> %broadcast.splatinsert, <4 x float> poison, <4 x i32> zeroinitializer
  %8 = fpext <4 x float> %broadcast.splat to <4 x double>
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %9 = getelementptr inbounds float, ptr %1, i64 %index
  %wide.load = load <4 x float>, ptr %9, align 4, !tbaa !5, !alias.scope !12
  %10 = fsub <4 x float> %broadcast.splat, %wide.load
  %11 = tail call <4 x float> @llvm.fabs.v4f32(<4 x float> %10)
  %12 = fpext <4 x float> %11 to <4 x double>
  %13 = fdiv <4 x double> %12, %8
  %14 = fadd <4 x double> %13, <double 1.000000e+00, double 1.000000e+00, double 1.000000e+00, double 1.000000e+00>
  %15 = fptrunc <4 x double> %14 to <4 x float>
  %16 = getelementptr inbounds float, ptr %3, i64 %index
  store <4 x float> %15, ptr %16, align 4, !tbaa !5, !alias.scope !14, !noalias !16
  %index.next = add nuw i64 %index, 4
  %17 = icmp eq i64 %index.next, %n.vec
  br i1 %17, label %middle.block, label %vector.body, !llvm.loop !17

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %0
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader14

.lr.ph.preheader14:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %.08.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %0, 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.preheader14
  %18 = load float, ptr %2, align 4, !tbaa !5
  %19 = getelementptr inbounds float, ptr %1, i64 %.08.ph
  %20 = load float, ptr %19, align 4, !tbaa !5
  %21 = fsub float %18, %20
  %22 = tail call float @llvm.fabs.f32(float %21)
  %23 = fpext float %22 to double
  %24 = fpext float %18 to double
  %25 = fdiv double %23, %24
  %26 = fadd double %25, 1.000000e+00
  %27 = fptrunc double %26 to float
  %28 = getelementptr inbounds float, ptr %3, i64 %.08.ph
  store float %27, ptr %28, align 4, !tbaa !5
  %29 = or disjoint i64 %.08.ph, 1
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader14
  %.08.unr = phi i64 [ %.08.ph, %.lr.ph.preheader14 ], [ %29, %.lr.ph.prol ]
  %30 = add nsw i64 %0, -1
  %31 = icmp eq i64 %.08.ph, %30
  br i1 %31, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %.08 = phi i64 [ %55, %.lr.ph ], [ %.08.unr, %.lr.ph.prol.loopexit ]
  %32 = load float, ptr %2, align 4, !tbaa !5
  %33 = getelementptr inbounds float, ptr %1, i64 %.08
  %34 = load float, ptr %33, align 4, !tbaa !5
  %35 = fsub float %32, %34
  %36 = tail call float @llvm.fabs.f32(float %35)
  %37 = fpext float %36 to double
  %38 = fpext float %32 to double
  %39 = fdiv double %37, %38
  %40 = fadd double %39, 1.000000e+00
  %41 = fptrunc double %40 to float
  %42 = getelementptr inbounds float, ptr %3, i64 %.08
  store float %41, ptr %42, align 4, !tbaa !5
  %43 = add nuw nsw i64 %.08, 1
  %44 = load float, ptr %2, align 4, !tbaa !5
  %45 = getelementptr inbounds float, ptr %1, i64 %43
  %46 = load float, ptr %45, align 4, !tbaa !5
  %47 = fsub float %44, %46
  %48 = tail call float @llvm.fabs.f32(float %47)
  %49 = fpext float %48 to double
  %50 = fpext float %44 to double
  %51 = fdiv double %49, %50
  %52 = fadd double %51, 1.000000e+00
  %53 = fptrunc double %52 to float
  %54 = getelementptr inbounds float, ptr %3, i64 %43
  store float %53, ptr %54, align 4, !tbaa !5
  %55 = add nuw nsw i64 %.08, 2
  %exitcond.not.1 = icmp eq i64 %55, %0
  br i1 %exitcond.not.1, label %._crit_edge, label %.lr.ph, !llvm.loop !21

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

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fabs.f32(float) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <4 x float> @llvm.fabs.v4f32(<4 x float>) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10}
!10 = distinct !{!10, !11}
!11 = distinct !{!11, !"LVerDomain"}
!12 = !{!13}
!13 = distinct !{!13, !11}
!14 = !{!15}
!15 = distinct !{!15, !11}
!16 = !{!10, !13}
!17 = distinct !{!17, !18, !19, !20}
!18 = !{!"llvm.loop.mustprogress"}
!19 = !{!"llvm.loop.isvectorized", i32 1}
!20 = !{!"llvm.loop.unroll.runtime.disable"}
!21 = distinct !{!21, !18, !19}


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