; LLVM IR from ekoontz/graphlab :: src/graphlab/extern/metis/libmetis/fortran.ll_libmetis (Change2FNumbering2)

; 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: nounwind uwtable
define dso_local void @libmetis__Change2FNumbering2(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 i64, align 8
  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) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %9 = load ptr, ptr %5, align 8, !tbaa !9
  %10 = load i64, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds i64, ptr %9, i64 %10
  %12 = load i64, ptr %11, align 8, !tbaa !5
  store i64 %12, ptr %8, align 8, !tbaa !5
  store i64 0, ptr %7, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %23, %3
  %14 = load i64, ptr %7, align 8, !tbaa !5
  %15 = load i64, ptr %8, align 8, !tbaa !5
  %16 = icmp slt i64 %14, %15
  br i1 %16, label %17, label %26

17:                                               ; preds = %13
  %18 = load ptr, ptr %6, align 8, !tbaa !9
  %19 = load i64, ptr %7, align 8, !tbaa !5
  %20 = getelementptr inbounds i64, ptr %18, i64 %19
  %21 = load i64, ptr %20, align 8, !tbaa !5
  %22 = add nsw i64 %21, 1
  store i64 %22, ptr %20, align 8, !tbaa !5
  br label %23

23:                                               ; preds = %17
  %24 = load i64, ptr %7, align 8, !tbaa !5
  %25 = add nsw i64 %24, 1
  store i64 %25, ptr %7, align 8, !tbaa !5
  br label %13, !llvm.loop !11

26:                                               ; preds = %13
  store i64 0, ptr %7, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %37, %26
  %28 = load i64, ptr %7, align 8, !tbaa !5
  %29 = load i64, ptr %4, align 8, !tbaa !5
  %30 = icmp sle i64 %28, %29
  br i1 %30, label %31, label %40

31:                                               ; preds = %27
  %32 = load ptr, ptr %5, align 8, !tbaa !9
  %33 = load i64, ptr %7, align 8, !tbaa !5
  %34 = getelementptr inbounds i64, ptr %32, i64 %33
  %35 = load i64, ptr %34, align 8, !tbaa !5
  %36 = add nsw i64 %35, 1
  store i64 %36, ptr %34, align 8, !tbaa !5
  br label %37

37:                                               ; preds = %31
  %38 = load i64, ptr %7, align 8, !tbaa !5
  %39 = add nsw i64 %38, 1
  store i64 %39, ptr %7, align 8, !tbaa !5
  br label %27, !llvm.loop !13

40:                                               ; preds = %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret void
}

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 = { 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 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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__Change2FNumbering2(i64 noundef %0, ptr nocapture noundef %1, ptr nocapture noundef %2) local_unnamed_addr #0 {
  %4 = getelementptr inbounds i64, ptr %1, i64 %0
  %5 = load i64, ptr %4, align 8, !tbaa !5
  %6 = icmp sgt i64 %5, 0
  br i1 %6, label %.lr.ph.preheader, label %.preheader

.lr.ph.preheader:                                 ; preds = %3
  %min.iters.check = icmp ult i64 %5, 4
  br i1 %min.iters.check, label %.lr.ph.preheader31, label %vector.ph

.lr.ph.preheader31:                               ; preds = %middle.block, %.lr.ph.preheader
  %.011.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  br label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %5, 9223372036854775804
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %7 = getelementptr inbounds i64, ptr %2, i64 %index
  %8 = getelementptr inbounds i8, ptr %7, i64 16
  %wide.load = load <2 x i64>, ptr %7, align 8, !tbaa !5
  %wide.load16 = load <2 x i64>, ptr %8, align 8, !tbaa !5
  %9 = add nsw <2 x i64> %wide.load, <i64 1, i64 1>
  %10 = add nsw <2 x i64> %wide.load16, <i64 1, i64 1>
  store <2 x i64> %9, ptr %7, align 8, !tbaa !5
  store <2 x i64> %10, ptr %8, align 8, !tbaa !5
  %index.next = add nuw i64 %index, 4
  %11 = icmp eq i64 %index.next, %n.vec
  br i1 %11, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %5, %n.vec
  br i1 %cmp.n, label %.preheader, label %.lr.ph.preheader31

.preheader:                                       ; preds = %.lr.ph, %middle.block, %3
  %.not12 = icmp slt i64 %0, 0
  br i1 %.not12, label %._crit_edge, label %.lr.ph14.preheader

.lr.ph14.preheader:                               ; preds = %.preheader
  %12 = add nuw i64 %0, 1
  %min.iters.check19 = icmp ult i64 %0, 3
  br i1 %min.iters.check19, label %.lr.ph14.preheader30, label %vector.ph20

.lr.ph14.preheader30:                             ; preds = %middle.block17, %.lr.ph14.preheader
  %.113.ph = phi i64 [ 0, %.lr.ph14.preheader ], [ %n.vec22, %middle.block17 ]
  br label %.lr.ph14

vector.ph20:                                      ; preds = %.lr.ph14.preheader
  %n.vec22 = and i64 %12, -4
  br label %vector.body24

vector.body24:                                    ; preds = %vector.body24, %vector.ph20
  %index25 = phi i64 [ 0, %vector.ph20 ], [ %index.next28, %vector.body24 ]
  %13 = getelementptr inbounds i64, ptr %1, i64 %index25
  %14 = getelementptr inbounds i8, ptr %13, i64 16
  %wide.load26 = load <2 x i64>, ptr %13, align 8, !tbaa !5
  %wide.load27 = load <2 x i64>, ptr %14, align 8, !tbaa !5
  %15 = add nsw <2 x i64> %wide.load26, <i64 1, i64 1>
  %16 = add nsw <2 x i64> %wide.load27, <i64 1, i64 1>
  store <2 x i64> %15, ptr %13, align 8, !tbaa !5
  store <2 x i64> %16, ptr %14, align 8, !tbaa !5
  %index.next28 = add nuw i64 %index25, 4
  %17 = icmp eq i64 %index.next28, %n.vec22
  br i1 %17, label %middle.block17, label %vector.body24, !llvm.loop !13

middle.block17:                                   ; preds = %vector.body24
  %cmp.n29 = icmp eq i64 %12, %n.vec22
  br i1 %cmp.n29, label %._crit_edge, label %.lr.ph14.preheader30

.lr.ph:                                           ; preds = %.lr.ph.preheader31, %.lr.ph
  %.011 = phi i64 [ %21, %.lr.ph ], [ %.011.ph, %.lr.ph.preheader31 ]
  %18 = getelementptr inbounds i64, ptr %2, i64 %.011
  %19 = load i64, ptr %18, align 8, !tbaa !5
  %20 = add nsw i64 %19, 1
  store i64 %20, ptr %18, align 8, !tbaa !5
  %21 = add nuw nsw i64 %.011, 1
  %exitcond.not = icmp eq i64 %21, %5
  br i1 %exitcond.not, label %.preheader, label %.lr.ph, !llvm.loop !14

.lr.ph14:                                         ; preds = %.lr.ph14.preheader30, %.lr.ph14
  %.113 = phi i64 [ %25, %.lr.ph14 ], [ %.113.ph, %.lr.ph14.preheader30 ]
  %22 = getelementptr inbounds i64, ptr %1, i64 %.113
  %23 = load i64, ptr %22, align 8, !tbaa !5
  %24 = add nsw i64 %23, 1
  store i64 %24, ptr %22, align 8, !tbaa !5
  %25 = add nuw i64 %.113, 1
  %exitcond15.not = icmp eq i64 %.113, %0
  br i1 %exitcond15.not, label %._crit_edge, label %.lr.ph14, !llvm.loop !15

._crit_edge:                                      ; preds = %.lr.ph14, %middle.block17, %.preheader
  ret void
}

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 = !{!"long", !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, !12}
!14 = distinct !{!14, !10, !12, !11}
!15 = distinct !{!15, !10, !12, !11}


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