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

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

13:                                               ; preds = %33, %3
  %14 = load i64, ptr %7, align 8, !tbaa !5
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = icmp ult i64 %14, %15
  br i1 %16, label %17, label %37

17:                                               ; preds = %13
  %18 = load ptr, ptr %5, 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 = load ptr, ptr %5, align 8, !tbaa !9
  %23 = load i64, ptr %8, align 8, !tbaa !5
  %24 = getelementptr inbounds i64, ptr %22, i64 %23
  %25 = load i64, ptr %24, align 8, !tbaa !5
  %26 = icmp sgt i64 %21, %25
  br i1 %26, label %27, label %29

27:                                               ; preds = %17
  %28 = load i64, ptr %7, align 8, !tbaa !5
  br label %31

29:                                               ; preds = %17
  %30 = load i64, ptr %8, align 8, !tbaa !5
  br label %31

31:                                               ; preds = %29, %27
  %32 = phi i64 [ %28, %27 ], [ %30, %29 ]
  store i64 %32, ptr %8, align 8, !tbaa !5
  br label %33

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

37:                                               ; preds = %13
  %38 = load i64, ptr %8, 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 %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret i64 %40
}

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"}


; 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 i64 @libmetis__idxargmax_strd(i64 noundef %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = mul i64 %2, %0
  %5 = icmp ugt i64 %4, %2
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.016 = phi i64 [ %11, %.lr.ph ], [ 0, %3 ]
  %.01415 = phi i64 [ %12, %.lr.ph ], [ %2, %3 ]
  %6 = getelementptr inbounds i64, ptr %1, i64 %.01415
  %7 = load i64, ptr %6, align 8, !tbaa !5
  %8 = getelementptr inbounds i64, ptr %1, i64 %.016
  %9 = load i64, ptr %8, align 8, !tbaa !5
  %10 = icmp sgt i64 %7, %9
  %11 = select i1 %10, i64 %.01415, i64 %.016
  %12 = add i64 %.01415, %2
  %13 = icmp ult i64 %12, %4
  br i1 %13, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.0.lcssa = phi i64 [ 0, %3 ], [ %11, %.lr.ph ]
  %14 = udiv i64 %.0.lcssa, %2
  ret i64 %14
}

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 = !{!"long", !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: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass