; 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
define dso_local void @r8vec_sort_insert_a(i32 noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca double, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i32 1, ptr %5, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %52, %2
  %9 = load i32, ptr %5, align 4, !tbaa !5
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %12, label %55

12:                                               ; preds = %8
  %13 = load ptr, ptr %4, align 8, !tbaa !9
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds double, ptr %13, i64 %15
  %17 = load double, ptr %16, align 8, !tbaa !11
  store double %17, ptr %7, align 8, !tbaa !11
  %18 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %18, ptr %6, align 4, !tbaa !5
  br label %19

19:                                               ; preds = %33, %12
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = icmp sle i32 1, %20
  br i1 %21, label %22, label %31

22:                                               ; preds = %19
  %23 = load double, ptr %7, align 8, !tbaa !11
  %24 = load ptr, ptr %4, align 8, !tbaa !9
  %25 = load i32, ptr %6, align 4, !tbaa !5
  %26 = sub nsw i32 %25, 1
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds double, ptr %24, i64 %27
  %29 = load double, ptr %28, align 8, !tbaa !11
  %30 = fcmp olt double %23, %29
  br label %31

31:                                               ; preds = %22, %19
  %32 = phi i1 [ false, %19 ], [ %30, %22 ]
  br i1 %32, label %33, label %46

33:                                               ; preds = %31
  %34 = load ptr, ptr %4, align 8, !tbaa !9
  %35 = load i32, ptr %6, 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 = load ptr, ptr %4, align 8, !tbaa !9
  %41 = load i32, ptr %6, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds double, ptr %40, i64 %42
  store double %39, ptr %43, align 8, !tbaa !11
  %44 = load i32, ptr %6, align 4, !tbaa !5
  %45 = sub nsw i32 %44, 1
  store i32 %45, ptr %6, align 4, !tbaa !5
  br label %19, !llvm.loop !13

46:                                               ; preds = %31
  %47 = load double, ptr %7, align 8, !tbaa !11
  %48 = load ptr, ptr %4, align 8, !tbaa !9
  %49 = load i32, ptr %6, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds double, ptr %48, i64 %50
  store double %47, ptr %51, align 8, !tbaa !11
  br label %52

52:                                               ; preds = %46
  %53 = load i32, ptr %5, align 4, !tbaa !5
  %54 = add nsw i32 %53, 1
  store i32 %54, ptr %5, align 4, !tbaa !5
  br label %8, !llvm.loop !15

55:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #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"}
!15 = distinct !{!15, !14}


; 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: readwrite) uwtable
define dso_local void @r8vec_sort_insert_a(i32 noundef %0, ptr nocapture noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %0, 1
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext nneg i32 %0 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.critedge
  %indvars.iv = phi i64 [ 1, %.lr.ph.preheader ], [ %indvars.iv.next, %.critedge ]
  %4 = getelementptr inbounds double, ptr %1, i64 %indvars.iv
  %5 = load double, ptr %4, align 8, !tbaa !5
  br label %6

6:                                                ; preds = %.lr.ph, %11
  %indvars.iv21 = phi i64 [ %indvars.iv, %.lr.ph ], [ %indvars.iv.next22, %11 ]
  %indvars.iv.next22 = add nsw i64 %indvars.iv21, -1
  %7 = and i64 %indvars.iv.next22, 4294967295
  %8 = getelementptr inbounds double, ptr %1, i64 %7
  %9 = load double, ptr %8, align 8, !tbaa !5
  %10 = fcmp olt double %5, %9
  br i1 %10, label %11, label %.critedge

11:                                               ; preds = %6
  %12 = getelementptr inbounds double, ptr %1, i64 %indvars.iv21
  store double %9, ptr %12, align 8, !tbaa !5
  %13 = icmp sgt i64 %indvars.iv21, 1
  br i1 %13, label %6, label %.critedge, !llvm.loop !9

.critedge:                                        ; preds = %11, %6
  %.017.lcssa = phi i64 [ 0, %11 ], [ %indvars.iv21, %6 ]
  %sext = shl i64 %.017.lcssa, 32
  %14 = ashr exact i64 %sext, 29
  %15 = getelementptr inbounds i8, ptr %1, i64 %14
  store double %5, ptr %15, align 8, !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 = %.critedge, %2
  ret void
}

attributes #0 = { 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


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