; LLVM IR from ekoontz/graphlab :: src/graphlab/extern/metis/libmetis/mfm.ll_libmetis (Compute2WayHLoadImbalance)

; 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: nounwind uwtable
define dso_local float @libmetis__Compute2WayHLoadImbalance(i64 noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca float, align 4
  %9 = alloca float, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store float 0.000000e+00, ptr %8, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i64 0, ptr %7, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %40, %3
  %11 = load i64, ptr %7, align 8, !tbaa !5
  %12 = load i64, ptr %4, align 8, !tbaa !5
  %13 = icmp slt i64 %11, %12
  br i1 %13, label %14, label %43

14:                                               ; preds = %10
  %15 = load ptr, ptr %6, 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 %5, align 8, !tbaa !9
  %19 = load i64, ptr %7, 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 %6, 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 = fptrunc double %29 to float
  store float %30, ptr %9, align 4, !tbaa !11
  %31 = load float, ptr %8, align 4, !tbaa !11
  %32 = load float, ptr %9, align 4, !tbaa !11
  %33 = fcmp olt float %31, %32
  br i1 %33, label %34, label %36

34:                                               ; preds = %14
  %35 = load float, ptr %9, align 4, !tbaa !11
  br label %38

36:                                               ; preds = %14
  %37 = load float, ptr %8, align 4, !tbaa !11
  br label %38

38:                                               ; preds = %36, %34
  %39 = phi float [ %35, %34 ], [ %37, %36 ]
  store float %39, ptr %8, align 4, !tbaa !11
  br label %40

40:                                               ; preds = %38
  %41 = load i64, ptr %7, align 8, !tbaa !5
  %42 = add nsw i64 %41, 1
  store i64 %42, ptr %7, align 8, !tbaa !5
  br label %10, !llvm.loop !13

43:                                               ; preds = %10
  %44 = load float, ptr %8, align 4, !tbaa !11
  %45 = fpext float %44 to double
  %46 = fadd double 1.000000e+00, %45
  %47 = fptrunc double %46 to float
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret float %47
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #2

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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: read) uwtable
define dso_local float @libmetis__Compute2WayHLoadImbalance(i64 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %4 = icmp sgt i64 %0, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3
  %5 = load float, ptr %2, align 4, !tbaa !5
  %xtraiter = and i64 %0, 1
  %6 = icmp eq i64 %0, 1
  br i1 %6, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %0, 9223372036854775806
  br label %7

7:                                                ; preds = %7, %.lr.ph.new
  %.013 = phi i64 [ 0, %.lr.ph.new ], [ %23, %7 ]
  %.01112 = phi float [ 0.000000e+00, %.lr.ph.new ], [ %22, %7 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.1, %7 ]
  %8 = getelementptr inbounds float, ptr %1, i64 %.013
  %9 = load float, ptr %8, align 4, !tbaa !5
  %10 = fsub float %5, %9
  %11 = tail call float @llvm.fabs.f32(float %10)
  %12 = fdiv float %11, %5
  %13 = fcmp olt float %.01112, %12
  %14 = select i1 %13, float %12, float %.01112
  %15 = or disjoint i64 %.013, 1
  %16 = getelementptr inbounds float, ptr %1, i64 %15
  %17 = load float, ptr %16, align 4, !tbaa !5
  %18 = fsub float %5, %17
  %19 = tail call float @llvm.fabs.f32(float %18)
  %20 = fdiv float %19, %5
  %21 = fcmp olt float %14, %20
  %22 = select i1 %21, float %20, float %14
  %23 = add nuw nsw i64 %.013, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.loopexit.unr-lcssa, label %7, !llvm.loop !9

._crit_edge.loopexit.unr-lcssa:                   ; preds = %7, %.lr.ph
  %.lcssa.ph = phi float [ poison, %.lr.ph ], [ %22, %7 ]
  %.013.unr = phi i64 [ 0, %.lr.ph ], [ %23, %7 ]
  %.01112.unr = phi float [ 0.000000e+00, %.lr.ph ], [ %22, %7 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge.loopexit, label %._crit_edge.loopexit.epilog-lcssa

._crit_edge.loopexit.epilog-lcssa:                ; preds = %._crit_edge.loopexit.unr-lcssa
  %24 = getelementptr inbounds float, ptr %1, i64 %.013.unr
  %25 = load float, ptr %24, align 4, !tbaa !5
  %26 = fsub float %5, %25
  %27 = tail call float @llvm.fabs.f32(float %26)
  %28 = fdiv float %27, %5
  %29 = fcmp olt float %.01112.unr, %28
  %30 = select i1 %29, float %28, float %.01112.unr
  br label %._crit_edge.loopexit

._crit_edge.loopexit:                             ; preds = %._crit_edge.loopexit.unr-lcssa, %._crit_edge.loopexit.epilog-lcssa
  %.lcssa = phi float [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %30, %._crit_edge.loopexit.epilog-lcssa ]
  %31 = fadd float %.lcssa, 1.000000e+00
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %3
  %.011.lcssa = phi float [ 1.000000e+00, %3 ], [ %31, %._crit_edge.loopexit ]
  ret float %.011.lcssa
}

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

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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