; LLVM IR from Dimandragon/non-parametric-dsp :: alglib-cpp/src/ap.ll (ZN11alglib_impl8rmuladdvElPKNS_9ae_vectorES2_PS0_PNS_8ae_stateE)

; 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.alglib_impl::ae_vector" = type { i64, i64, i8, %"struct.alglib_impl::ae_dyn_block", %union.anon.0 }
%"struct.alglib_impl::ae_dyn_block" = type { ptr, ptr, ptr, ptr }
%union.anon.0 = type { ptr }

; 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.fmuladd.f64(double, double, double) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN11alglib_impl8rmuladdvElPKNS_9ae_vectorES2_PS0_PNS_8ae_stateE(i64 noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3, ptr noundef %4) #2 {
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i64, align 8
  store i64 %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !9
  store ptr %4, ptr %10, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #3
  %12 = load i64, ptr %6, align 8, !tbaa !5
  %13 = icmp sge i64 %12, 16
  br i1 %13, label %14, label %15

14:                                               ; preds = %5
  br label %15

15:                                               ; preds = %14, %5
  store i64 0, ptr %11, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %46, %15
  %17 = load i64, ptr %11, align 8, !tbaa !5
  %18 = load i64, ptr %6, align 8, !tbaa !5
  %19 = sub nsw i64 %18, 1
  %20 = icmp sle i64 %17, %19
  br i1 %20, label %21, label %49

21:                                               ; preds = %16
  %22 = load ptr, ptr %9, align 8, !tbaa !9
  %23 = getelementptr inbounds %"struct.alglib_impl::ae_vector", ptr %22, i32 0, i32 4
  %24 = load ptr, ptr %23, align 8, !tbaa !11
  %25 = load i64, ptr %11, align 8, !tbaa !5
  %26 = getelementptr inbounds double, ptr %24, i64 %25
  %27 = load double, ptr %26, align 8, !tbaa !12
  %28 = load ptr, ptr %7, align 8, !tbaa !9
  %29 = getelementptr inbounds %"struct.alglib_impl::ae_vector", ptr %28, i32 0, i32 4
  %30 = load ptr, ptr %29, align 8, !tbaa !11
  %31 = load i64, ptr %11, align 8, !tbaa !5
  %32 = getelementptr inbounds double, ptr %30, i64 %31
  %33 = load double, ptr %32, align 8, !tbaa !12
  %34 = load ptr, ptr %8, align 8, !tbaa !9
  %35 = getelementptr inbounds %"struct.alglib_impl::ae_vector", ptr %34, i32 0, i32 4
  %36 = load ptr, ptr %35, align 8, !tbaa !11
  %37 = load i64, ptr %11, align 8, !tbaa !5
  %38 = getelementptr inbounds double, ptr %36, i64 %37
  %39 = load double, ptr %38, align 8, !tbaa !12
  %40 = call double @llvm.fmuladd.f64(double %33, double %39, double %27)
  %41 = load ptr, ptr %9, align 8, !tbaa !9
  %42 = getelementptr inbounds %"struct.alglib_impl::ae_vector", ptr %41, i32 0, i32 4
  %43 = load ptr, ptr %42, align 8, !tbaa !11
  %44 = load i64, ptr %11, align 8, !tbaa !5
  %45 = getelementptr inbounds double, ptr %43, i64 %44
  store double %40, ptr %45, align 8, !tbaa !12
  br label %46

46:                                               ; preds = %21
  %47 = load i64, ptr %11, align 8, !tbaa !5
  %48 = add nsw i64 %47, 1
  store i64 %48, ptr %11, align 8, !tbaa !5
  br label %16, !llvm.loop !14

49:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #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 = { mustprogress 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"double", !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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.fmuladd.f64(double, double, double) #0

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZN11alglib_impl8rmuladdvElPKNS_9ae_vectorES2_PS0_PNS_8ae_stateE(i64 noundef %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2, ptr nocapture noundef readonly %3, ptr nocapture noundef readnone %4) local_unnamed_addr #1 {
  %.not.not11 = icmp sgt i64 %0, 0
  br i1 %.not.not11, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %5
  %6 = getelementptr inbounds i8, ptr %3, i64 56
  %7 = getelementptr inbounds i8, ptr %1, i64 56
  %8 = getelementptr inbounds i8, ptr %2, i64 56
  %xtraiter = and i64 %0, 1
  %9 = icmp eq i64 %0, 1
  br i1 %9, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %0, 9223372036854775806
  br label %10

10:                                               ; preds = %10, %.lr.ph.new
  %.012 = phi i64 [ 0, %.lr.ph.new ], [ %32, %10 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.1, %10 ]
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  %12 = getelementptr inbounds double, ptr %11, i64 %.012
  %13 = load double, ptr %12, align 8, !tbaa !8
  %14 = load ptr, ptr %7, align 8, !tbaa !5
  %15 = getelementptr inbounds double, ptr %14, i64 %.012
  %16 = load double, ptr %15, align 8, !tbaa !8
  %17 = load ptr, ptr %8, align 8, !tbaa !5
  %18 = getelementptr inbounds double, ptr %17, i64 %.012
  %19 = load double, ptr %18, align 8, !tbaa !8
  %20 = tail call double @llvm.fmuladd.f64(double %16, double %19, double %13)
  store double %20, ptr %12, align 8, !tbaa !8
  %21 = or disjoint i64 %.012, 1
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = getelementptr inbounds double, ptr %22, i64 %21
  %24 = load double, ptr %23, align 8, !tbaa !8
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = getelementptr inbounds double, ptr %25, i64 %21
  %27 = load double, ptr %26, align 8, !tbaa !8
  %28 = load ptr, ptr %8, align 8, !tbaa !5
  %29 = getelementptr inbounds double, ptr %28, i64 %21
  %30 = load double, ptr %29, align 8, !tbaa !8
  %31 = tail call double @llvm.fmuladd.f64(double %27, double %30, double %24)
  store double %31, ptr %23, align 8, !tbaa !8
  %32 = add nuw nsw i64 %.012, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.loopexit.unr-lcssa, label %10, !llvm.loop !10

._crit_edge.loopexit.unr-lcssa:                   ; preds = %10, %.lr.ph
  %.012.unr = phi i64 [ 0, %.lr.ph ], [ %32, %10 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %._crit_edge.loopexit.epilog-lcssa

._crit_edge.loopexit.epilog-lcssa:                ; preds = %._crit_edge.loopexit.unr-lcssa
  %33 = load ptr, ptr %6, align 8, !tbaa !5
  %34 = getelementptr inbounds double, ptr %33, i64 %.012.unr
  %35 = load double, ptr %34, align 8, !tbaa !8
  %36 = load ptr, ptr %7, align 8, !tbaa !5
  %37 = getelementptr inbounds double, ptr %36, i64 %.012.unr
  %38 = load double, ptr %37, align 8, !tbaa !8
  %39 = load ptr, ptr %8, align 8, !tbaa !5
  %40 = getelementptr inbounds double, ptr %39, i64 %.012.unr
  %41 = load double, ptr %40, align 8, !tbaa !8
  %42 = tail call double @llvm.fmuladd.f64(double %38, double %41, double %35)
  store double %42, ptr %34, align 8, !tbaa !8
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit.epilog-lcssa, %._crit_edge.loopexit.unr-lcssa, %5
  ret void
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"double", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


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