; LLVM IR from atlantis13579/Riemann :: Src/Destruction/GraphPartition.ll (ZN5metis7iargmaxEmPim)

; 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: mustprogress nounwind uwtable
define dso_local noundef i64 @_ZN5metis7iargmaxEmPim(i64 noundef %0, ptr noundef %1, i64 noundef %2) #0 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store i64 %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  store i64 0, ptr %9, align 8, !tbaa !5
  store i64 1, ptr %7, align 8, !tbaa !5
  %10 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %10, ptr %8, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %31, %3
  %12 = load i64, ptr %7, align 8, !tbaa !5
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = icmp ult i64 %12, %13
  br i1 %14, label %15, label %37

15:                                               ; preds = %11
  %16 = load ptr, ptr %5, align 8, !tbaa !9
  %17 = load i64, ptr %8, align 8, !tbaa !5
  %18 = getelementptr inbounds i32, ptr %16, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !11
  %20 = load ptr, ptr %5, align 8, !tbaa !9
  %21 = load i64, ptr %9, align 8, !tbaa !5
  %22 = getelementptr inbounds i32, ptr %20, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !11
  %24 = icmp sgt i32 %19, %23
  br i1 %24, label %25, label %27

25:                                               ; preds = %15
  %26 = load i64, ptr %8, align 8, !tbaa !5
  br label %29

27:                                               ; preds = %15
  %28 = load i64, ptr %9, align 8, !tbaa !5
  br label %29

29:                                               ; preds = %27, %25
  %30 = phi i64 [ %26, %25 ], [ %28, %27 ]
  store i64 %30, ptr %9, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %29
  %32 = load i64, ptr %7, align 8, !tbaa !5
  %33 = add i64 %32, 1
  store i64 %33, ptr %7, align 8, !tbaa !5
  %34 = load i64, ptr %6, align 8, !tbaa !5
  %35 = load i64, ptr %8, align 8, !tbaa !5
  %36 = add i64 %35, %34
  store i64 %36, ptr %8, align 8, !tbaa !5
  br label %11, !llvm.loop !13

37:                                               ; preds = %11
  %38 = load i64, ptr %9, align 8, !tbaa !5
  %39 = load i64, ptr %6, align 8, !tbaa !5
  %40 = udiv i64 %38, %39
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret i64 %40
}

; 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 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local noundef i64 @_ZN5metis7iargmaxEmPim(i64 noundef %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = icmp ugt i64 %0, 1
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %5 = add i64 %0, -1
  %6 = add i64 %0, -2
  %xtraiter = and i64 %5, 3
  %7 = icmp ult i64 %6, 3
  br i1 %7, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %5, -4
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %.017 = phi i64 [ 0, %.lr.ph.preheader.new ], [ %34, %.lr.ph ]
  %.01316 = phi i64 [ %2, %.lr.ph.preheader.new ], [ %35, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %8 = getelementptr inbounds i32, ptr %1, i64 %.01316
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = getelementptr inbounds i32, ptr %1, i64 %.017
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp sgt i32 %9, %11
  %13 = select i1 %12, i64 %.01316, i64 %.017
  %14 = add i64 %.01316, %2
  %15 = getelementptr inbounds i32, ptr %1, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = getelementptr inbounds i32, ptr %1, i64 %13
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = icmp sgt i32 %16, %18
  %20 = select i1 %19, i64 %14, i64 %13
  %21 = add i64 %14, %2
  %22 = getelementptr inbounds i32, ptr %1, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = getelementptr inbounds i32, ptr %1, i64 %20
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = icmp sgt i32 %23, %25
  %27 = select i1 %26, i64 %21, i64 %20
  %28 = add i64 %21, %2
  %29 = getelementptr inbounds i32, ptr %1, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = getelementptr inbounds i32, ptr %1, i64 %27
  %32 = load i32, ptr %31, align 4, !tbaa !5
  %33 = icmp sgt i32 %30, %32
  %34 = select i1 %33, i64 %28, i64 %27
  %35 = add i64 %28, %2
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !9

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa.ph = phi i64 [ poison, %.lr.ph.preheader ], [ %34, %.lr.ph ]
  %.017.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %34, %.lr.ph ]
  %.01316.unr = phi i64 [ %2, %.lr.ph.preheader ], [ %35, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil
  %.017.epil = phi i64 [ %41, %.lr.ph.epil ], [ %.017.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.01316.epil = phi i64 [ %42, %.lr.ph.epil ], [ %.01316.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %36 = getelementptr inbounds i32, ptr %1, i64 %.01316.epil
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = getelementptr inbounds i32, ptr %1, i64 %.017.epil
  %39 = load i32, ptr %38, align 4, !tbaa !5
  %40 = icmp sgt i32 %37, %39
  %41 = select i1 %40, i64 %.01316.epil, i64 %.017.epil
  %42 = add i64 %.01316.epil, %2
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.lr.ph.epil, !llvm.loop !11

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil, %3
  %.0.lcssa = phi i64 [ 0, %3 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %41, %.lr.ph.epil ]
  %43 = udiv i64 %.0.lcssa, %2
  ret i64 %43
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn 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" }

!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++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.unroll.disable"}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass