; 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 allocsize(0)
declare noalias ptr @malloc(i64 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @r8vec_concatenate_new(i32 noundef %0, ptr noundef %1, i32 noundef %2, ptr noundef %3) #2 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  store i32 %0, ptr %5, align 4, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = add nsw i32 %11, %12
  %14 = sext i32 %13 to i64
  %15 = mul i64 %14, 8
  %16 = call noalias ptr @malloc(i64 noundef %15) #4
  store ptr %16, ptr %10, align 8, !tbaa !9
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %31, %4
  %18 = load i32, ptr %9, align 4, !tbaa !5
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = icmp slt i32 %18, %19
  br i1 %20, label %21, label %34

21:                                               ; preds = %17
  %22 = load ptr, ptr %6, align 8, !tbaa !9
  %23 = load i32, ptr %9, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds double, ptr %22, i64 %24
  %26 = load double, ptr %25, align 8, !tbaa !11
  %27 = load ptr, ptr %10, align 8, !tbaa !9
  %28 = load i32, ptr %9, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds double, ptr %27, i64 %29
  store double %26, ptr %30, align 8, !tbaa !11
  br label %31

31:                                               ; preds = %21
  %32 = load i32, ptr %9, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %9, align 4, !tbaa !5
  br label %17, !llvm.loop !13

34:                                               ; preds = %17
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %35

35:                                               ; preds = %51, %34
  %36 = load i32, ptr %9, align 4, !tbaa !5
  %37 = load i32, ptr %7, align 4, !tbaa !5
  %38 = icmp slt i32 %36, %37
  br i1 %38, label %39, label %54

39:                                               ; preds = %35
  %40 = load ptr, ptr %8, align 8, !tbaa !9
  %41 = load i32, ptr %9, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds double, ptr %40, i64 %42
  %44 = load double, ptr %43, align 8, !tbaa !11
  %45 = load ptr, ptr %10, align 8, !tbaa !9
  %46 = load i32, ptr %5, align 4, !tbaa !5
  %47 = load i32, ptr %9, align 4, !tbaa !5
  %48 = add nsw i32 %46, %47
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds double, ptr %45, i64 %49
  store double %44, ptr %50, align 8, !tbaa !11
  br label %51

51:                                               ; preds = %39
  %52 = load i32, ptr %9, align 4, !tbaa !5
  %53 = add nsw i32 %52, 1
  store i32 %53, ptr %9, align 4, !tbaa !5
  br label %35, !llvm.loop !15

54:                                               ; preds = %35
  %55 = load ptr, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  ret ptr %55
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind allocsize(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 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 }
attributes #4 = { nounwind allocsize(0) }

!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: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn uwtable
define dso_local noalias noundef ptr @r8vec_concatenate_new(i32 noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2, ptr nocapture noundef readonly %3) local_unnamed_addr #1 {
  %5 = add nsw i32 %2, %0
  %6 = sext i32 %5 to i64
  %7 = shl nsw i64 %6, 3
  %8 = tail call noalias ptr @malloc(i64 noundef %7) #3
  %9 = icmp sgt i32 %0, 0
  br i1 %9, label %.lr.ph.preheader, label %.preheader

.lr.ph.preheader:                                 ; preds = %4
  %10 = zext nneg i32 %0 to i64
  %11 = shl nuw nsw i64 %10, 3
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 8 %8, ptr align 8 %1, i64 %11, i1 false), !tbaa !5
  br label %.preheader

.preheader:                                       ; preds = %.lr.ph.preheader, %4
  %12 = icmp sgt i32 %2, 0
  br i1 %12, label %.lr.ph20.preheader, label %._crit_edge

.lr.ph20.preheader:                               ; preds = %.preheader
  %13 = sext i32 %0 to i64
  %14 = shl nsw i64 %13, 3
  %scevgep = getelementptr i8, ptr %8, i64 %14
  %15 = zext nneg i32 %2 to i64
  %16 = shl nuw nsw i64 %15, 3
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 8 %scevgep, ptr align 8 %3, i64 %16, i1 false), !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph20.preheader, %.preheader
  ret ptr %8
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

attributes #0 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { mustprogress nofree nounwind willreturn 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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nounwind allocsize(0) }

!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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass