; 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_stutter_new(i32 noundef %0, ptr noundef %1, i32 noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %11 = load i32, ptr %6, align 4, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = mul 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 %7, align 8, !tbaa !9
  store i32 0, ptr %10, align 4, !tbaa !5
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %42, %3
  %18 = load i32, ptr %8, align 4, !tbaa !5
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = icmp slt i32 %18, %19
  br i1 %20, label %21, label %45

21:                                               ; preds = %17
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %38, %21
  %23 = load i32, ptr %9, align 4, !tbaa !5
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = icmp slt i32 %23, %24
  br i1 %25, label %26, label %41

26:                                               ; preds = %22
  %27 = load ptr, ptr %5, align 8, !tbaa !9
  %28 = load i32, ptr %8, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds double, ptr %27, i64 %29
  %31 = load double, ptr %30, align 8, !tbaa !11
  %32 = load ptr, ptr %7, align 8, !tbaa !9
  %33 = load i32, ptr %10, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds double, ptr %32, i64 %34
  store double %31, ptr %35, align 8, !tbaa !11
  %36 = load i32, ptr %10, align 4, !tbaa !5
  %37 = add nsw i32 %36, 1
  store i32 %37, ptr %10, align 4, !tbaa !5
  br label %38

38:                                               ; preds = %26
  %39 = load i32, ptr %9, align 4, !tbaa !5
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %9, align 4, !tbaa !5
  br label %22, !llvm.loop !13

41:                                               ; preds = %22
  br label %42

42:                                               ; preds = %41
  %43 = load i32, ptr %8, align 4, !tbaa !5
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %8, align 4, !tbaa !5
  br label %17, !llvm.loop !15

45:                                               ; preds = %17
  %46 = load ptr, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret ptr %46
}

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: nofree nounwind memory(write, argmem: read, inaccessiblemem: readwrite) uwtable
define dso_local noalias noundef ptr @r8vec_stutter_new(i32 noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #1 {
  %4 = mul nsw i32 %2, %0
  %5 = sext i32 %4 to i64
  %6 = shl nsw i64 %5, 3
  %7 = tail call noalias ptr @malloc(i64 noundef %6) #2
  %8 = icmp sgt i32 %0, 0
  %9 = icmp sgt i32 %2, 0
  %or.cond = and i1 %8, %9
  br i1 %or.cond, label %.preheader.us.preheader, label %._crit_edge19

.preheader.us.preheader:                          ; preds = %3
  %wide.trip.count = zext nneg i32 %0 to i64
  %10 = zext nneg i32 %2 to i64
  %min.iters.check = icmp ult i32 %2, 4
  %n.vec = and i64 %10, 2147483644
  %cmp.n = icmp eq i64 %n.vec, %10
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv22 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next23, %._crit_edge.us ]
  %.018.us = phi i32 [ 0, %.preheader.us.preheader ], [ %14, %._crit_edge.us ]
  %11 = getelementptr inbounds double, ptr %1, i64 %indvars.iv22
  %12 = load double, ptr %11, align 8, !tbaa !5
  %13 = sext i32 %.018.us to i64
  %14 = add i32 %.018.us, %2
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.ph

vector.ph:                                        ; preds = %.preheader.us
  %ind.end = add nsw i64 %n.vec, %13
  %broadcast.splatinsert = insertelement <2 x double> poison, double %12, i64 0
  %broadcast.splat = shufflevector <2 x double> %broadcast.splatinsert, <2 x double> poison, <2 x i32> zeroinitializer
  %invariant.gep = getelementptr double, ptr %7, i64 %13
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %gep = getelementptr double, ptr %invariant.gep, i64 %index
  %15 = getelementptr inbounds i8, ptr %gep, i64 16
  store <2 x double> %broadcast.splat, ptr %gep, align 8, !tbaa !5
  store <2 x double> %broadcast.splat, ptr %15, align 8, !tbaa !5
  %index.next = add nuw i64 %index, 4
  %16 = icmp eq i64 %index.next, %n.vec
  br i1 %16, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  br i1 %cmp.n, label %._crit_edge.us, label %scalar.ph.preheader

scalar.ph.preheader:                              ; preds = %middle.block, %.preheader.us
  %indvars.iv.ph = phi i64 [ %13, %.preheader.us ], [ %ind.end, %middle.block ]
  br label %scalar.ph

scalar.ph:                                        ; preds = %scalar.ph.preheader, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %scalar.ph ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %17 = getelementptr inbounds double, ptr %7, i64 %indvars.iv
  store double %12, ptr %17, align 8, !tbaa !5
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond.not = icmp eq i32 %14, %lftr.wideiv
  br i1 %exitcond.not, label %._crit_edge.us, label %scalar.ph, !llvm.loop !13

._crit_edge.us:                                   ; preds = %scalar.ph, %middle.block
  %indvars.iv.next23 = add nuw nsw i64 %indvars.iv22, 1
  %exitcond25.not = icmp eq i64 %indvars.iv.next23, %wide.trip.count
  br i1 %exitcond25.not, label %._crit_edge19, label %.preheader.us, !llvm.loop !14

._crit_edge19:                                    ; preds = %._crit_edge.us, %3
  ret ptr %7
}

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 = { nofree nounwind memory(write, argmem: read, inaccessiblemem: 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" }
attributes #2 = { 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"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}
!14 = distinct !{!14, !10}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass