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

; 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 float @libmetis__rvecmaxdiff(i32 noundef %0, ptr noundef %1, ptr noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca float, align 4
  store i32 %0, ptr %4, align 4, !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 4, ptr %7) #2
  %8 = load ptr, ptr %5, align 8, !tbaa !9
  %9 = getelementptr inbounds float, ptr %8, i64 0
  %10 = load float, ptr %9, align 4, !tbaa !11
  %11 = load ptr, ptr %6, align 8, !tbaa !9
  %12 = getelementptr inbounds float, ptr %11, i64 0
  %13 = load float, ptr %12, align 4, !tbaa !11
  %14 = fsub float %10, %13
  store float %14, ptr %7, align 4, !tbaa !11
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = add nsw i32 %15, -1
  store i32 %16, ptr %4, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %47, %3
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = icmp sgt i32 %18, 0
  br i1 %19, label %20, label %50

20:                                               ; preds = %17
  %21 = load float, ptr %7, align 4, !tbaa !11
  %22 = load ptr, ptr %5, align 8, !tbaa !9
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds float, ptr %22, i64 %24
  %26 = load float, ptr %25, align 4, !tbaa !11
  %27 = load ptr, ptr %6, align 8, !tbaa !9
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds float, ptr %27, i64 %29
  %31 = load float, ptr %30, align 4, !tbaa !11
  %32 = fsub float %26, %31
  %33 = fcmp olt float %21, %32
  br i1 %33, label %34, label %46

34:                                               ; preds = %20
  %35 = load ptr, ptr %5, align 8, !tbaa !9
  %36 = load i32, ptr %4, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds float, ptr %35, i64 %37
  %39 = load float, ptr %38, align 4, !tbaa !11
  %40 = load ptr, ptr %6, align 8, !tbaa !9
  %41 = load i32, ptr %4, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds float, ptr %40, i64 %42
  %44 = load float, ptr %43, align 4, !tbaa !11
  %45 = fsub float %39, %44
  store float %45, ptr %7, align 4, !tbaa !11
  br label %46

46:                                               ; preds = %34, %20
  br label %47

47:                                               ; preds = %46
  %48 = load i32, ptr %4, align 4, !tbaa !5
  %49 = add nsw i32 %48, -1
  store i32 %49, ptr %4, align 4, !tbaa !5
  br label %17, !llvm.loop !13

50:                                               ; preds = %17
  %51 = load float, ptr %7, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret float %51
}

; 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 = !{!"int", !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__rvecmaxdiff(i32 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %4 = load float, ptr %1, align 4, !tbaa !5
  %5 = load float, ptr %2, align 4, !tbaa !5
  %6 = fsub float %4, %5
  %7 = icmp sgt i32 %0, 1
  br i1 %7, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %8 = zext nneg i32 %0 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %8, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %.017 = phi float [ %6, %.lr.ph.preheader ], [ %.1, %.lr.ph ]
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %9 = getelementptr inbounds float, ptr %1, i64 %indvars.iv.next
  %10 = load float, ptr %9, align 4, !tbaa !5
  %11 = getelementptr inbounds float, ptr %2, i64 %indvars.iv.next
  %12 = load float, ptr %11, align 4, !tbaa !5
  %13 = fsub float %10, %12
  %14 = fcmp olt float %.017, %13
  %.1 = select i1 %14, float %13, float %.017
  %15 = icmp ugt i64 %indvars.iv, 2
  br i1 %15, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.0.lcssa = phi float [ %6, %3 ], [ %.1, %.lr.ph ]
  ret float %.0.lcssa
}

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 = !{!"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: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass