; 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: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #1

; Function Attrs: nounwind uwtable
define dso_local void @r8vec_sorted_undex(i32 noundef %0, ptr noundef %1, i32 noundef %2, double noundef %3, ptr noundef %4, ptr noundef %5) #2 {
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca double, align 8
  %11 = alloca ptr, align 8
  %12 = alloca ptr, align 8
  %13 = alloca i32, align 4
  %14 = alloca i32, align 4
  store i32 %0, ptr %7, align 4, !tbaa !5
  store ptr %1, ptr %8, align 8, !tbaa !9
  store i32 %2, ptr %9, align 4, !tbaa !5
  store double %3, ptr %10, align 8, !tbaa !11
  store ptr %4, ptr %11, align 8, !tbaa !9
  store ptr %5, ptr %12, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %14) #3
  store i32 0, ptr %13, align 4, !tbaa !5
  store i32 0, ptr %14, align 4, !tbaa !5
  %15 = load i32, ptr %13, align 4, !tbaa !5
  %16 = load ptr, ptr %11, align 8, !tbaa !9
  %17 = load i32, ptr %14, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds i32, ptr %16, i64 %18
  store i32 %15, ptr %19, align 4, !tbaa !5
  %20 = load i32, ptr %14, align 4, !tbaa !5
  %21 = load ptr, ptr %12, align 8, !tbaa !9
  %22 = load i32, ptr %13, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr %21, i64 %23
  store i32 %20, ptr %24, align 4, !tbaa !5
  store i32 1, ptr %13, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %62, %6
  %26 = load i32, ptr %13, align 4, !tbaa !5
  %27 = load i32, ptr %7, align 4, !tbaa !5
  %28 = icmp slt i32 %26, %27
  br i1 %28, label %29, label %65

29:                                               ; preds = %25
  %30 = load double, ptr %10, align 8, !tbaa !11
  %31 = load ptr, ptr %8, align 8, !tbaa !9
  %32 = load i32, ptr %13, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds double, ptr %31, i64 %33
  %35 = load double, ptr %34, align 8, !tbaa !11
  %36 = load ptr, ptr %8, align 8, !tbaa !9
  %37 = load ptr, ptr %11, align 8, !tbaa !9
  %38 = load i32, ptr %14, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds i32, ptr %37, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds double, ptr %36, i64 %42
  %44 = load double, ptr %43, align 8, !tbaa !11
  %45 = fsub double %35, %44
  %46 = call double @llvm.fabs.f64(double %45)
  %47 = fcmp olt double %30, %46
  br i1 %47, label %48, label %56

48:                                               ; preds = %29
  %49 = load i32, ptr %14, align 4, !tbaa !5
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %14, align 4, !tbaa !5
  %51 = load i32, ptr %13, align 4, !tbaa !5
  %52 = load ptr, ptr %11, align 8, !tbaa !9
  %53 = load i32, ptr %14, align 4, !tbaa !5
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds i32, ptr %52, i64 %54
  store i32 %51, ptr %55, align 4, !tbaa !5
  br label %56

56:                                               ; preds = %48, %29
  %57 = load i32, ptr %14, align 4, !tbaa !5
  %58 = load ptr, ptr %12, align 8, !tbaa !9
  %59 = load i32, ptr %13, align 4, !tbaa !5
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds i32, ptr %58, i64 %60
  store i32 %57, ptr %61, align 4, !tbaa !5
  br label %62

62:                                               ; preds = %56
  %63 = load i32, ptr %13, align 4, !tbaa !5
  %64 = add nsw i32 %63, 1
  store i32 %64, ptr %13, align 4, !tbaa !5
  br label %25, !llvm.loop !13

65:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %14) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { 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 #3 = { 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: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #0

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @r8vec_sorted_undex(i32 noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2, double noundef %3, ptr nocapture noundef %4, ptr nocapture noundef writeonly %5) local_unnamed_addr #1 {
  store i32 0, ptr %4, align 4, !tbaa !5
  store i32 0, ptr %5, align 4, !tbaa !5
  %7 = icmp sgt i32 %0, 1
  br i1 %7, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %6
  %wide.trip.count = zext nneg i32 %0 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %24
  %indvars.iv = phi i64 [ 1, %.lr.ph.preheader ], [ %indvars.iv.next, %24 ]
  %.023 = phi i32 [ 0, %.lr.ph.preheader ], [ %.1, %24 ]
  %8 = getelementptr inbounds double, ptr %1, i64 %indvars.iv
  %9 = load double, ptr %8, align 8, !tbaa !9
  %10 = sext i32 %.023 to i64
  %11 = getelementptr inbounds i32, ptr %4, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds double, ptr %1, i64 %13
  %15 = load double, ptr %14, align 8, !tbaa !9
  %16 = fsub double %9, %15
  %17 = tail call double @llvm.fabs.f64(double %16)
  %18 = fcmp ogt double %17, %3
  br i1 %18, label %19, label %24

19:                                               ; preds = %.lr.ph
  %20 = add nsw i32 %.023, 1
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i32, ptr %4, i64 %21
  %23 = trunc nuw nsw i64 %indvars.iv to i32
  store i32 %23, ptr %22, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %19, %.lr.ph
  %.1 = phi i32 [ %20, %19 ], [ %.023, %.lr.ph ]
  %25 = getelementptr inbounds i32, ptr %5, i64 %indvars.iv
  store i32 %.1, ptr %25, align 4, !tbaa !5
  %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 %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %24, %6
  ret void
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass