; LLVM IR from ermig1979/Simd :: src/Simd/SimdBaseFill.ll (ZN4Simd4Base7Fill32fEPfmPKf)

; 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 nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; 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 @_ZN4Simd4Base7Fill32fEPfmPKf(ptr noundef %0, i64 noundef %1, ptr noundef %2) #2 {
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca float, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !5
  %8 = load ptr, ptr %6, align 8, !tbaa !5
  %9 = icmp eq ptr %8, null
  br i1 %9, label %15, label %10

10:                                               ; preds = %3
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  %12 = getelementptr inbounds float, ptr %11, i64 0
  %13 = load float, ptr %12, align 4, !tbaa !11
  %14 = fcmp oeq float %13, 0.000000e+00
  br i1 %14, label %15, label %19

15:                                               ; preds = %10, %3
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load i64, ptr %5, align 8, !tbaa !9
  %18 = mul i64 %17, 4
  call void @llvm.memset.p0.i64(ptr align 4 %16, i8 0, i64 %18, i1 false)
  br label %34

19:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = getelementptr inbounds float, ptr %20, i64 0
  %22 = load float, ptr %21, align 4, !tbaa !11
  store float %22, ptr %7, align 4, !tbaa !11
  br label %23

23:                                               ; preds = %30, %19
  %24 = load i64, ptr %5, align 8, !tbaa !9
  %25 = icmp ne i64 %24, 0
  br i1 %25, label %26, label %33

26:                                               ; preds = %23
  %27 = load float, ptr %7, align 4, !tbaa !11
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = getelementptr inbounds float, ptr %28, i32 1
  store ptr %29, ptr %4, align 8, !tbaa !5
  store float %27, ptr %28, align 4, !tbaa !11
  br label %30

30:                                               ; preds = %26
  %31 = load i64, ptr %5, align 8, !tbaa !9
  %32 = add i64 %31, -1
  store i64 %32, ptr %5, align 8, !tbaa !9
  br label %23, !llvm.loop !13

33:                                               ; preds = %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %34

34:                                               ; preds = %33, %15
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !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 nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(write, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZN4Simd4Base7Fill32fEPfmPKf(ptr nocapture noundef writeonly %0, i64 noundef %1, ptr noundef readonly %2) local_unnamed_addr #1 {
  %4 = icmp eq ptr %2, null
  br i1 %4, label %11, label %5

5:                                                ; preds = %3
  %6 = load float, ptr %2, align 4, !tbaa !5
  %7 = fcmp oeq float %6, 0.000000e+00
  br i1 %7, label %11, label %.preheader

.preheader:                                       ; preds = %5
  %.not11 = icmp eq i64 %1, 0
  br i1 %.not11, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %.preheader
  %min.iters.check = icmp ult i64 %1, 8
  br i1 %min.iters.check, label %.lr.ph.preheader17, label %vector.ph

.lr.ph.preheader17:                               ; preds = %middle.block, %.lr.ph.preheader
  %.013.ph = phi ptr [ %0, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  %.0812.ph = phi i64 [ %1, %.lr.ph.preheader ], [ %ind.end14, %middle.block ]
  br label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %1, -8
  %8 = shl i64 %n.vec, 2
  %ind.end = getelementptr i8, ptr %0, i64 %8
  %ind.end14 = and i64 %1, 7
  %broadcast.splatinsert = insertelement <4 x float> poison, float %6, i64 0
  %broadcast.splat = shufflevector <4 x float> %broadcast.splatinsert, <4 x float> poison, <4 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, 2
  %next.gep = getelementptr i8, ptr %0, i64 %offset.idx
  %9 = getelementptr i8, ptr %next.gep, i64 16
  store <4 x float> %broadcast.splat, ptr %next.gep, align 4, !tbaa !5
  store <4 x float> %broadcast.splat, ptr %9, align 4, !tbaa !5
  %index.next = add nuw i64 %index, 8
  %10 = icmp eq i64 %index.next, %n.vec
  br i1 %10, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %1
  br i1 %cmp.n, label %.loopexit, label %.lr.ph.preheader17

11:                                               ; preds = %5, %3
  %12 = shl i64 %1, 2
  tail call void @llvm.memset.p0.i64(ptr align 4 %0, i8 0, i64 %12, i1 false)
  br label %.loopexit

.lr.ph:                                           ; preds = %.lr.ph.preheader17, %.lr.ph
  %.013 = phi ptr [ %13, %.lr.ph ], [ %.013.ph, %.lr.ph.preheader17 ]
  %.0812 = phi i64 [ %14, %.lr.ph ], [ %.0812.ph, %.lr.ph.preheader17 ]
  %13 = getelementptr inbounds i8, ptr %.013, i64 4
  store float %6, ptr %.013, align 4, !tbaa !5
  %14 = add i64 %.0812, -1
  %.not = icmp eq i64 %14, 0
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !13

.loopexit:                                        ; preds = %.lr.ph, %middle.block, %.preheader, %11
  ret void
}

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #1 = { mustprogress nofree norecurse nosync nounwind memory(write, argmem: 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 = !{!"float", !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: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass