; LLVM IR from ekoontz/graphlab :: src/graphlab/extern/metis/libmetis/fortran.ll_libmetis (Change2CNumbering)

; 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 @libmetis__Change2CNumbering(i64 noundef %0, ptr noundef %1, ptr noundef %2) #0 {
  %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
  store i64 0, ptr %7, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %19, %3
  %10 = load i64, ptr %7, align 8, !tbaa !5
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = icmp sle i64 %10, %11
  br i1 %12, label %13, label %22

13:                                               ; preds = %9
  %14 = load ptr, ptr %5, align 8, !tbaa !9
  %15 = load i64, ptr %7, align 8, !tbaa !5
  %16 = getelementptr inbounds i64, ptr %14, i64 %15
  %17 = load i64, ptr %16, align 8, !tbaa !5
  %18 = add nsw i64 %17, -1
  store i64 %18, ptr %16, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %13
  %20 = load i64, ptr %7, align 8, !tbaa !5
  %21 = add nsw i64 %20, 1
  store i64 %21, ptr %7, align 8, !tbaa !5
  br label %9, !llvm.loop !11

22:                                               ; preds = %9
  %23 = load ptr, ptr %5, align 8, !tbaa !9
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds i64, ptr %23, i64 %24
  %26 = load i64, ptr %25, align 8, !tbaa !5
  store i64 %26, ptr %8, align 8, !tbaa !5
  store i64 0, ptr %7, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %37, %22
  %28 = load i64, ptr %7, align 8, !tbaa !5
  %29 = load i64, ptr %8, align 8, !tbaa !5
  %30 = icmp slt i64 %28, %29
  br i1 %30, label %31, label %40

31:                                               ; preds = %27
  %32 = load ptr, ptr %6, 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
}

; 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 = !{!"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__Change2CNumbering(i64 noundef %0, ptr nocapture noundef %1, ptr nocapture noundef %2) local_unnamed_addr #0 {
  %.not12 = icmp slt i64 %0, 0
  br i1 %.not12, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %4 = add nuw i64 %0, 1
  %min.iters.check = icmp ult i64 %0, 3
  br i1 %min.iters.check, label %.lr.ph.preheader34, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %4, -4
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %5 = getelementptr inbounds i64, ptr %1, i64 %index
  %6 = getelementptr inbounds i8, ptr %5, i64 16
  %wide.load = load <2 x i64>, ptr %5, align 8, !tbaa !5
  %wide.load19 = load <2 x i64>, ptr %6, align 8, !tbaa !5
  %7 = add nsw <2 x i64> %wide.load, <i64 -1, i64 -1>
  %8 = add nsw <2 x i64> %wide.load19, <i64 -1, i64 -1>
  store <2 x i64> %7, ptr %5, align 8, !tbaa !5
  store <2 x i64> %8, ptr %6, align 8, !tbaa !5
  %index.next = add nuw i64 %index, 4
  %9 = icmp eq i64 %index.next, %n.vec
  br i1 %9, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %4, %n.vec
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader34

.lr.ph.preheader34:                               ; preds = %middle.block, %.lr.ph.preheader
  %.013.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader34, %.lr.ph
  %.013 = phi i64 [ %13, %.lr.ph ], [ %.013.ph, %.lr.ph.preheader34 ]
  %10 = getelementptr inbounds i64, ptr %1, i64 %.013
  %11 = load i64, ptr %10, align 8, !tbaa !5
  %12 = add nsw i64 %11, -1
  store i64 %12, ptr %10, align 8, !tbaa !5
  %13 = add nuw i64 %.013, 1
  %exitcond.not = icmp eq i64 %.013, %0
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %3
  %14 = getelementptr inbounds i64, ptr %1, i64 %0
  %15 = load i64, ptr %14, align 8, !tbaa !5
  %16 = icmp sgt i64 %15, 0
  br i1 %16, label %.lr.ph16.preheader, label %._crit_edge17

.lr.ph16.preheader:                               ; preds = %._crit_edge
  %min.iters.check22 = icmp ult i64 %15, 4
  br i1 %min.iters.check22, label %.lr.ph16.preheader33, label %vector.ph23

vector.ph23:                                      ; preds = %.lr.ph16.preheader
  %n.vec25 = and i64 %15, 9223372036854775804
  br label %vector.body27

vector.body27:                                    ; preds = %vector.body27, %vector.ph23
  %index28 = phi i64 [ 0, %vector.ph23 ], [ %index.next31, %vector.body27 ]
  %17 = getelementptr inbounds i64, ptr %2, i64 %index28
  %18 = getelementptr inbounds i8, ptr %17, i64 16
  %wide.load29 = load <2 x i64>, ptr %17, align 8, !tbaa !5
  %wide.load30 = load <2 x i64>, ptr %18, align 8, !tbaa !5
  %19 = add nsw <2 x i64> %wide.load29, <i64 -1, i64 -1>
  %20 = add nsw <2 x i64> %wide.load30, <i64 -1, i64 -1>
  store <2 x i64> %19, ptr %17, align 8, !tbaa !5
  store <2 x i64> %20, ptr %18, align 8, !tbaa !5
  %index.next31 = add nuw i64 %index28, 4
  %21 = icmp eq i64 %index.next31, %n.vec25
  br i1 %21, label %middle.block20, label %vector.body27, !llvm.loop !14

middle.block20:                                   ; preds = %vector.body27
  %cmp.n32 = icmp eq i64 %15, %n.vec25
  br i1 %cmp.n32, label %._crit_edge17, label %.lr.ph16.preheader33

.lr.ph16.preheader33:                             ; preds = %middle.block20, %.lr.ph16.preheader
  %.114.ph = phi i64 [ 0, %.lr.ph16.preheader ], [ %n.vec25, %middle.block20 ]
  br label %.lr.ph16

.lr.ph16:                                         ; preds = %.lr.ph16.preheader33, %.lr.ph16
  %.114 = phi i64 [ %25, %.lr.ph16 ], [ %.114.ph, %.lr.ph16.preheader33 ]
  %22 = getelementptr inbounds i64, ptr %2, i64 %.114
  %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 nsw i64 %.114, 1
  %exitcond18.not = icmp eq i64 %25, %15
  br i1 %exitcond18.not, label %._crit_edge17, label %.lr.ph16, !llvm.loop !15

._crit_edge17:                                    ; preds = %.lr.ph16, %middle.block20, %._crit_edge
  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, !12, !11}
!14 = distinct !{!14, !10, !11, !12}
!15 = distinct !{!15, !10, !12, !11}


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