; LLVM IR from InsightSoftwareConsortium/ITK :: Modules/ThirdParty/VNL/src/vxl/v3p/netlib/linalg (lsmrBase)

; 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: mustprogress nounwind uwtable
define dso_local void @_ZNK8lsmrBase5ScaleEjdPd(ptr noundef nonnull align 8 dereferenceable(136) %0, i32 noundef %1, double noundef %2, ptr noundef %3) #1 align 2 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca double, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store double %2, ptr %7, align 8, !tbaa !11
  store ptr %3, ptr %8, align 8, !tbaa !5
  %10 = load ptr, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %11 = load ptr, ptr %8, align 8, !tbaa !5
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = zext i32 %12 to i64
  %14 = getelementptr inbounds double, ptr %11, i64 %13
  store ptr %14, ptr %9, align 8, !tbaa !5
  br label %15

15:                                               ; preds = %19, %4
  %16 = load ptr, ptr %8, align 8, !tbaa !5
  %17 = load ptr, ptr %9, align 8, !tbaa !5
  %18 = icmp ne ptr %16, %17
  br i1 %18, label %19, label %25

19:                                               ; preds = %15
  %20 = load double, ptr %7, align 8, !tbaa !11
  %21 = load ptr, ptr %8, align 8, !tbaa !5
  %22 = getelementptr inbounds double, ptr %21, i32 1
  store ptr %22, ptr %8, align 8, !tbaa !5
  %23 = load double, ptr %21, align 8, !tbaa !11
  %24 = fmul double %23, %20
  store double %24, ptr %21, align 8, !tbaa !11
  br label %15, !llvm.loop !13

25:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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 nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZNK8lsmrBase5ScaleEjdPd(ptr nocapture noundef nonnull readnone align 8 dereferenceable(136) %0, i32 noundef %1, double noundef %2, ptr noundef %3) local_unnamed_addr #0 align 2 {
  %5 = zext i32 %1 to i64
  %6 = getelementptr inbounds double, ptr %3, i64 %5
  %.not6 = icmp eq i32 %1, 0
  br i1 %.not6, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %4
  %7 = add nuw nsw i64 %5, 2305843009213693951
  %8 = and i64 %7, 2305843009213693951
  %9 = add nuw nsw i64 %8, 1
  %min.iters.check = icmp ult i64 %8, 3
  br i1 %min.iters.check, label %.lr.ph.preheader10, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %9, 4611686018427387900
  %10 = shl i64 %n.vec, 3
  %ind.end = getelementptr i8, ptr %3, i64 %10
  %broadcast.splatinsert = insertelement <2 x double> poison, double %2, i64 0
  %broadcast.splat = shufflevector <2 x double> %broadcast.splatinsert, <2 x double> poison, <2 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %offset.idx = shl i64 %index, 3
  %next.gep = getelementptr i8, ptr %3, i64 %offset.idx
  %11 = getelementptr i8, ptr %next.gep, i64 16
  %wide.load = load <2 x double>, ptr %next.gep, align 8, !tbaa !5
  %wide.load9 = load <2 x double>, ptr %11, align 8, !tbaa !5
  %12 = fmul <2 x double> %wide.load, %broadcast.splat
  %13 = fmul <2 x double> %wide.load9, %broadcast.splat
  store <2 x double> %12, ptr %next.gep, align 8, !tbaa !5
  store <2 x double> %13, ptr %11, align 8, !tbaa !5
  %index.next = add nuw i64 %index, 4
  %14 = icmp eq i64 %index.next, %n.vec
  br i1 %14, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %9, %n.vec
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader10

.lr.ph.preheader10:                               ; preds = %middle.block, %.lr.ph.preheader
  %.07.ph = phi ptr [ %3, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader10, %.lr.ph
  %.07 = phi ptr [ %15, %.lr.ph ], [ %.07.ph, %.lr.ph.preheader10 ]
  %15 = getelementptr inbounds i8, ptr %.07, i64 8
  %16 = load double, ptr %.07, align 8, !tbaa !5
  %17 = fmul double %16, %2
  store double %17, ptr %.07, align 8, !tbaa !5
  %.not = icmp eq ptr %15, %6
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %4
  ret void
}

attributes #0 = { 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple 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}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass