; LLVM IR from GGiecold-zz/Cluster_Ensembles :: src/Cluster_Ensembles/Hypergraph_Partitioning/metis-5.1.0/libmetis (util)

; 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 i32 @libmetis__iargmax_strd(i64 noundef %0, ptr noundef %1, i32 noundef %2) #1 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %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 i32 %2, ptr %6, align 4, !tbaa !11
  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 %8, align 8, !tbaa !5
  %9 = load i32, ptr %6, align 4, !tbaa !11
  %10 = sext i32 %9 to i64
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = mul i64 %11, %10
  store i64 %12, ptr %4, align 8, !tbaa !5
  %13 = load i32, ptr %6, align 4, !tbaa !11
  %14 = sext i32 %13 to i64
  store i64 %14, ptr %7, align 8, !tbaa !5
  br label %15

15:                                               ; preds = %35, %3
  %16 = load i64, ptr %7, align 8, !tbaa !5
  %17 = load i64, ptr %4, align 8, !tbaa !5
  %18 = icmp ult i64 %16, %17
  br i1 %18, label %19, label %40

19:                                               ; preds = %15
  %20 = load ptr, ptr %5, align 8, !tbaa !9
  %21 = load i64, ptr %7, align 8, !tbaa !5
  %22 = getelementptr inbounds i32, ptr %20, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !11
  %24 = load ptr, ptr %5, align 8, !tbaa !9
  %25 = load i64, ptr %8, align 8, !tbaa !5
  %26 = getelementptr inbounds i32, ptr %24, i64 %25
  %27 = load i32, ptr %26, align 4, !tbaa !11
  %28 = icmp sgt i32 %23, %27
  br i1 %28, label %29, label %31

29:                                               ; preds = %19
  %30 = load i64, ptr %7, align 8, !tbaa !5
  br label %33

31:                                               ; preds = %19
  %32 = load i64, ptr %8, align 8, !tbaa !5
  br label %33

33:                                               ; preds = %31, %29
  %34 = phi i64 [ %30, %29 ], [ %32, %31 ]
  store i64 %34, ptr %8, align 8, !tbaa !5
  br label %35

35:                                               ; preds = %33
  %36 = load i32, ptr %6, align 4, !tbaa !11
  %37 = sext i32 %36 to i64
  %38 = load i64, ptr %7, align 8, !tbaa !5
  %39 = add i64 %38, %37
  store i64 %39, ptr %7, align 8, !tbaa !5
  br label %15, !llvm.loop !13

40:                                               ; preds = %15
  %41 = load i64, ptr %8, align 8, !tbaa !5
  %42 = load i32, ptr %6, align 4, !tbaa !11
  %43 = sext i32 %42 to i64
  %44 = udiv i64 %41, %43
  %45 = trunc i64 %44 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret i32 %45
}

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 = !{!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: nofree norecurse nosync nounwind memory(argmem: read) uwtable
define dso_local i32 @libmetis__iargmax_strd(i64 noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %2 to i64
  %5 = mul i64 %4, %0
  %6 = icmp ugt i64 %5, %4
  br i1 %6, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.016 = phi i64 [ %12, %.lr.ph ], [ 0, %3 ]
  %.01415 = phi i64 [ %13, %.lr.ph ], [ %4, %3 ]
  %7 = getelementptr inbounds i32, ptr %1, i64 %.01415
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = getelementptr inbounds i32, ptr %1, i64 %.016
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = icmp sgt i32 %8, %10
  %12 = select i1 %11, i64 %.01415, i64 %.016
  %13 = add i64 %.01415, %4
  %14 = icmp ult i64 %13, %5
  br i1 %14, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.0.lcssa = phi i64 [ 0, %3 ], [ %12, %.lr.ph ]
  %15 = udiv i64 %.0.lcssa, %4
  %16 = trunc i64 %15 to i32
  ret i32 %16
}

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" }

!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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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