; LLVM IR from CLASS-SZ/class_sz :: class-sz/tools (r8lib)

; 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
declare dso_local void @i4vec_zeros(i32 noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @r8vec2_sorted_unique_index(i32 noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3, ptr noundef %4) #1 {
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !9
  store ptr %4, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = icmp sle i32 %13, 0
  br i1 %14, label %15, label %17

15:                                               ; preds = %5
  %16 = load ptr, ptr %9, align 8, !tbaa !9
  store i32 0, ptr %16, align 4, !tbaa !5
  store i32 1, ptr %12, align 4
  br label %72

17:                                               ; preds = %5
  %18 = load i32, ptr %6, align 4, !tbaa !5
  %19 = load ptr, ptr %10, align 8, !tbaa !9
  call void @i4vec_zeros(i32 noundef %18, ptr noundef %19)
  %20 = load ptr, ptr %9, align 8, !tbaa !9
  store i32 1, ptr %20, align 4, !tbaa !5
  %21 = load ptr, ptr %10, align 8, !tbaa !9
  %22 = getelementptr inbounds i32, ptr %21, i64 0
  store i32 1, ptr %22, align 4, !tbaa !5
  store i32 2, ptr %11, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %68, %17
  %24 = load i32, ptr %11, align 4, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !5
  %26 = icmp sle i32 %24, %25
  br i1 %26, label %27, label %71

27:                                               ; preds = %23
  %28 = load ptr, ptr %7, align 8, !tbaa !9
  %29 = load i32, ptr %11, align 4, !tbaa !5
  %30 = sub nsw i32 %29, 2
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds double, ptr %28, i64 %31
  %33 = load double, ptr %32, align 8, !tbaa !11
  %34 = load ptr, ptr %7, align 8, !tbaa !9
  %35 = load i32, ptr %11, align 4, !tbaa !5
  %36 = sub nsw i32 %35, 1
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds double, ptr %34, i64 %37
  %39 = load double, ptr %38, align 8, !tbaa !11
  %40 = fcmp une double %33, %39
  br i1 %40, label %55, label %41

41:                                               ; preds = %27
  %42 = load ptr, ptr %8, align 8, !tbaa !9
  %43 = load i32, ptr %11, align 4, !tbaa !5
  %44 = sub nsw i32 %43, 2
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds double, ptr %42, i64 %45
  %47 = load double, ptr %46, align 8, !tbaa !11
  %48 = load ptr, ptr %8, align 8, !tbaa !9
  %49 = load i32, ptr %11, align 4, !tbaa !5
  %50 = sub nsw i32 %49, 1
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds double, ptr %48, i64 %51
  %53 = load double, ptr %52, align 8, !tbaa !11
  %54 = fcmp une double %47, %53
  br i1 %54, label %55, label %67

55:                                               ; preds = %41, %27
  %56 = load ptr, ptr %9, align 8, !tbaa !9
  %57 = load i32, ptr %56, align 4, !tbaa !5
  %58 = add nsw i32 %57, 1
  %59 = load ptr, ptr %9, align 8, !tbaa !9
  store i32 %58, ptr %59, align 4, !tbaa !5
  %60 = load i32, ptr %11, align 4, !tbaa !5
  %61 = load ptr, ptr %10, align 8, !tbaa !9
  %62 = load ptr, ptr %9, align 8, !tbaa !9
  %63 = load i32, ptr %62, align 4, !tbaa !5
  %64 = sub nsw i32 %63, 1
  %65 = sext i32 %64 to i64
  %66 = getelementptr inbounds i32, ptr %61, i64 %65
  store i32 %60, ptr %66, align 4, !tbaa !5
  br label %67

67:                                               ; preds = %55, %41
  br label %68

68:                                               ; preds = %67
  %69 = load i32, ptr %11, align 4, !tbaa !5
  %70 = add nsw i32 %69, 1
  store i32 %70, ptr %11, align 4, !tbaa !5
  br label %23, !llvm.loop !13

71:                                               ; preds = %23
  store i32 1, ptr %12, align 4
  br label %72

72:                                               ; preds = %71, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  ret void
}

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 = !{!"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 = !{!"double", !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: nounwind uwtable
declare dso_local void @i4vec_zeros(i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @r8vec2_sorted_unique_index(i32 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2, ptr nocapture noundef %3, ptr noundef %4) local_unnamed_addr #0 {
  %6 = icmp slt i32 %0, 1
  br i1 %6, label %7, label %8

7:                                                ; preds = %5
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %.loopexit

8:                                                ; preds = %5
  tail call void @i4vec_zeros(i32 noundef %0, ptr noundef %4)
  store i32 1, ptr %3, align 4, !tbaa !5
  store i32 1, ptr %4, align 4, !tbaa !5
  %.not22 = icmp eq i32 %0, 1
  br i1 %.not22, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %8
  %9 = add nuw i32 %0, 1
  %wide.trip.count = zext i32 %9 to i64
  %.pre = load double, ptr %1, align 8, !tbaa !9
  %invariant.gep = getelementptr i8, ptr %2, i64 -16
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %26
  %10 = phi double [ %.pre, %.lr.ph.preheader ], [ %13, %26 ]
  %indvars.iv = phi i64 [ 2, %.lr.ph.preheader ], [ %indvars.iv.next, %26 ]
  %11 = add nsw i64 %indvars.iv, -1
  %12 = getelementptr inbounds double, ptr %1, i64 %11
  %13 = load double, ptr %12, align 8, !tbaa !9
  %14 = fcmp une double %10, %13
  br i1 %14, label %20, label %15

15:                                               ; preds = %.lr.ph
  %gep = getelementptr double, ptr %invariant.gep, i64 %indvars.iv
  %16 = load double, ptr %gep, align 8, !tbaa !9
  %17 = getelementptr inbounds double, ptr %2, i64 %11
  %18 = load double, ptr %17, align 8, !tbaa !9
  %19 = fcmp une double %16, %18
  br i1 %19, label %20, label %26

20:                                               ; preds = %15, %.lr.ph
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %3, align 4, !tbaa !5
  %23 = sext i32 %21 to i64
  %24 = getelementptr inbounds i32, ptr %4, i64 %23
  %25 = trunc nuw nsw i64 %indvars.iv to i32
  store i32 %25, ptr %24, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %15, %20
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph, !llvm.loop !11

.loopexit:                                        ; preds = %26, %8, %7
  ret void
}

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" }

!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 = !{!"double", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass