; LLVM IR from MaxGoryunov/LinearSystemsToolkit :: LinearSystemsToolkit (Vector)

; 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"

%struct.Vector = type { ptr, i32 }

; Function Attrs: nounwind uwtable
declare dso_local ptr @vectorCreate(i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @vectorDiff(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.Vector, ptr %7, i32 0, i32 1
  %9 = load i32, ptr %8, align 8, !tbaa !9
  %10 = call ptr @vectorCreate(i32 noundef %9)
  store ptr %10, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !12
  br label %11

11:                                               ; preds = %40, %2
  %12 = load i32, ptr %6, align 4, !tbaa !12
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.Vector, ptr %13, i32 0, i32 1
  %15 = load i32, ptr %14, align 8, !tbaa !9
  %16 = icmp slt i32 %12, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %43

18:                                               ; preds = %11
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.Vector, ptr %19, i32 0, i32 0
  %21 = load ptr, ptr %20, align 8, !tbaa !13
  %22 = load i32, ptr %6, align 4, !tbaa !12
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds double, ptr %21, i64 %23
  %25 = load double, ptr %24, align 8, !tbaa !14
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.Vector, ptr %26, i32 0, i32 0
  %28 = load ptr, ptr %27, align 8, !tbaa !13
  %29 = load i32, ptr %6, align 4, !tbaa !12
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds double, ptr %28, i64 %30
  %32 = load double, ptr %31, align 8, !tbaa !14
  %33 = fsub double %25, %32
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.Vector, ptr %34, i32 0, i32 0
  %36 = load ptr, ptr %35, align 8, !tbaa !13
  %37 = load i32, ptr %6, align 4, !tbaa !12
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds double, ptr %36, i64 %38
  store double %33, ptr %39, align 8, !tbaa !14
  br label %40

40:                                               ; preds = %18
  %41 = load i32, ptr %6, align 4, !tbaa !12
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %6, align 4, !tbaa !12
  br label %11, !llvm.loop !16

43:                                               ; preds = %17
  %44 = load ptr, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret ptr %44
}

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 8}
!10 = !{!"Vector", !6, i64 0, !11, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !6, i64 0}
!14 = !{!15, !15, i64 0}
!15 = !{!"double", !7, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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 ptr @vectorCreate(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @vectorDiff(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load i32, ptr %3, align 8, !tbaa !5
  %5 = tail call ptr @vectorCreate(i32 noundef %4)
  %6 = getelementptr inbounds i8, ptr %5, i64 8
  %7 = load i32, ptr %6, align 8, !tbaa !5
  %8 = icmp sgt i32 %7, 0
  br i1 %8, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2
  %9 = load ptr, ptr %0, align 8, !tbaa !11
  %10 = load ptr, ptr %1, align 8, !tbaa !11
  %11 = load ptr, ptr %5, align 8, !tbaa !11
  %wide.trip.count = zext nneg i32 %7 to i64
  %min.iters.check = icmp ult i32 %7, 8
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.memcheck

scalar.ph.preheader:                              ; preds = %middle.block, %vector.memcheck, %.lr.ph
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol

scalar.ph.prol:                                   ; preds = %scalar.ph.preheader, %scalar.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %scalar.ph.prol ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %prol.iter = phi i64 [ %prol.iter.next, %scalar.ph.prol ], [ 0, %scalar.ph.preheader ]
  %12 = getelementptr inbounds double, ptr %9, i64 %indvars.iv.prol
  %13 = load double, ptr %12, align 8, !tbaa !12
  %14 = getelementptr inbounds double, ptr %10, i64 %indvars.iv.prol
  %15 = load double, ptr %14, align 8, !tbaa !12
  %16 = fsub double %13, %15
  %17 = getelementptr inbounds double, ptr %11, i64 %indvars.iv.prol
  store double %16, ptr %17, align 8, !tbaa !12
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol, !llvm.loop !14

scalar.ph.prol.loopexit:                          ; preds = %scalar.ph.prol, %scalar.ph.preheader
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %scalar.ph.preheader ], [ %indvars.iv.next.prol, %scalar.ph.prol ]
  %18 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %19 = icmp ugt i64 %18, -4
  br i1 %19, label %._crit_edge, label %scalar.ph

vector.memcheck:                                  ; preds = %.lr.ph
  %20 = ptrtoint ptr %11 to i64
  %21 = ptrtoint ptr %10 to i64
  %22 = ptrtoint ptr %9 to i64
  %23 = sub i64 %20, %22
  %diff.check = icmp ult i64 %23, 32
  %24 = sub i64 %20, %21
  %diff.check12 = icmp ult i64 %24, 32
  %conflict.rdx = or i1 %diff.check, %diff.check12
  br i1 %conflict.rdx, label %scalar.ph.preheader, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 2147483644
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %25 = getelementptr inbounds double, ptr %9, i64 %index
  %26 = getelementptr inbounds i8, ptr %25, i64 16
  %wide.load = load <2 x double>, ptr %25, align 8, !tbaa !12
  %wide.load13 = load <2 x double>, ptr %26, align 8, !tbaa !12
  %27 = getelementptr inbounds double, ptr %10, i64 %index
  %28 = getelementptr inbounds i8, ptr %27, i64 16
  %wide.load14 = load <2 x double>, ptr %27, align 8, !tbaa !12
  %wide.load15 = load <2 x double>, ptr %28, align 8, !tbaa !12
  %29 = fsub <2 x double> %wide.load, %wide.load14
  %30 = fsub <2 x double> %wide.load13, %wide.load15
  %31 = getelementptr inbounds double, ptr %11, i64 %index
  %32 = getelementptr inbounds i8, ptr %31, i64 16
  store <2 x double> %29, ptr %31, align 8, !tbaa !12
  store <2 x double> %30, ptr %32, align 8, !tbaa !12
  %index.next = add nuw i64 %index, 4
  %33 = icmp eq i64 %index.next, %n.vec
  br i1 %33, label %middle.block, label %vector.body, !llvm.loop !16

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %scalar.ph.preheader

._crit_edge:                                      ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %middle.block, %2
  ret ptr %5

scalar.ph:                                        ; preds = %scalar.ph.prol.loopexit, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %scalar.ph ], [ %indvars.iv.unr, %scalar.ph.prol.loopexit ]
  %34 = getelementptr inbounds double, ptr %9, i64 %indvars.iv
  %35 = load double, ptr %34, align 8, !tbaa !12
  %36 = getelementptr inbounds double, ptr %10, i64 %indvars.iv
  %37 = load double, ptr %36, align 8, !tbaa !12
  %38 = fsub double %35, %37
  %39 = getelementptr inbounds double, ptr %11, i64 %indvars.iv
  store double %38, ptr %39, align 8, !tbaa !12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %40 = getelementptr inbounds double, ptr %9, i64 %indvars.iv.next
  %41 = load double, ptr %40, align 8, !tbaa !12
  %42 = getelementptr inbounds double, ptr %10, i64 %indvars.iv.next
  %43 = load double, ptr %42, align 8, !tbaa !12
  %44 = fsub double %41, %43
  %45 = getelementptr inbounds double, ptr %11, i64 %indvars.iv.next
  store double %44, ptr %45, align 8, !tbaa !12
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %46 = getelementptr inbounds double, ptr %9, i64 %indvars.iv.next.1
  %47 = load double, ptr %46, align 8, !tbaa !12
  %48 = getelementptr inbounds double, ptr %10, i64 %indvars.iv.next.1
  %49 = load double, ptr %48, align 8, !tbaa !12
  %50 = fsub double %47, %49
  %51 = getelementptr inbounds double, ptr %11, i64 %indvars.iv.next.1
  store double %50, ptr %51, align 8, !tbaa !12
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %52 = getelementptr inbounds double, ptr %9, i64 %indvars.iv.next.2
  %53 = load double, ptr %52, align 8, !tbaa !12
  %54 = getelementptr inbounds double, ptr %10, i64 %indvars.iv.next.2
  %55 = load double, ptr %54, align 8, !tbaa !12
  %56 = fsub double %53, %55
  %57 = getelementptr inbounds double, ptr %11, i64 %indvars.iv.next.2
  store double %56, ptr %57, align 8, !tbaa !12
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %wide.trip.count
  br i1 %exitcond.not.3, label %._crit_edge, label %scalar.ph, !llvm.loop !20
}

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, !10, i64 8}
!6 = !{!"Vector", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"double", !8, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.unroll.disable"}
!16 = distinct !{!16, !17, !18, !19}
!17 = !{!"llvm.loop.mustprogress"}
!18 = !{!"llvm.loop.isvectorized", i32 1}
!19 = !{!"llvm.loop.unroll.runtime.disable"}
!20 = distinct !{!20, !17, !18}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass