; LLVM IR from jgaeddert/liquid-dsp :: src/random/tests/random_distributions_autotest.ll (support_histogram_normalize)

; 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 uwtable
define dso_local float @_support_histogram_normalize(ptr noundef %0, i32 noundef %1, float noundef %2, float noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca float, align 4
  %8 = alloca float, align 4
  %9 = alloca float, align 4
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store float %2, ptr %7, align 4, !tbaa !11
  store float %3, ptr %8, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store float 0.000000e+00, ptr %9, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %23, %4
  %12 = load i32, ptr %10, align 4, !tbaa !9
  %13 = load i32, ptr %6, align 4, !tbaa !9
  %14 = icmp ult i32 %12, %13
  br i1 %14, label %15, label %26

15:                                               ; preds = %11
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load i32, ptr %10, align 4, !tbaa !9
  %18 = zext i32 %17 to i64
  %19 = getelementptr inbounds float, ptr %16, i64 %18
  %20 = load float, ptr %19, align 4, !tbaa !11
  %21 = load float, ptr %9, align 4, !tbaa !11
  %22 = fadd float %21, %20
  store float %22, ptr %9, align 4, !tbaa !11
  br label %23

23:                                               ; preds = %15
  %24 = load i32, ptr %10, align 4, !tbaa !9
  %25 = add i32 %24, 1
  store i32 %25, ptr %10, align 4, !tbaa !9
  br label %11, !llvm.loop !13

26:                                               ; preds = %11
  %27 = load float, ptr %8, align 4, !tbaa !11
  %28 = load float, ptr %7, align 4, !tbaa !11
  %29 = fsub float %27, %28
  %30 = load i32, ptr %6, align 4, !tbaa !9
  %31 = uitofp i32 %30 to float
  %32 = fdiv float %29, %31
  %33 = load float, ptr %9, align 4, !tbaa !11
  %34 = fmul float %33, %32
  store float %34, ptr %9, align 4, !tbaa !11
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %35

35:                                               ; preds = %47, %26
  %36 = load i32, ptr %10, align 4, !tbaa !9
  %37 = load i32, ptr %6, align 4, !tbaa !9
  %38 = icmp ult i32 %36, %37
  br i1 %38, label %39, label %50

39:                                               ; preds = %35
  %40 = load float, ptr %9, align 4, !tbaa !11
  %41 = load ptr, ptr %5, align 8, !tbaa !5
  %42 = load i32, ptr %10, align 4, !tbaa !9
  %43 = zext i32 %42 to i64
  %44 = getelementptr inbounds float, ptr %41, i64 %43
  %45 = load float, ptr %44, align 4, !tbaa !11
  %46 = fdiv float %45, %40
  store float %46, ptr %44, align 4, !tbaa !11
  br label %47

47:                                               ; preds = %39
  %48 = load i32, ptr %10, align 4, !tbaa !9
  %49 = add i32 %48, 1
  store i32 %49, ptr %10, align 4, !tbaa !9
  br label %35, !llvm.loop !15

50:                                               ; preds = %35
  %51 = load float, ptr %9, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  ret float %51
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local float @_support_histogram_normalize(ptr nocapture noundef %0, i32 noundef %1, float noundef %2, float noundef %3) local_unnamed_addr #0 {
  %.not = icmp eq i32 %1, 0
  br i1 %.not, label %._crit_edge.thread, label %.lr.ph.preheader

._crit_edge.thread:                               ; preds = %4
  %5 = fsub float %3, %2
  %6 = uitofp nneg i32 %1 to float
  %7 = fdiv float %5, %6
  %8 = fmul float %7, 0.000000e+00
  br label %._crit_edge23

.lr.ph.preheader:                                 ; preds = %4
  %wide.trip.count = zext i32 %1 to i64
  %xtraiter = and i64 %wide.trip.count, 7
  %9 = icmp ult i32 %1, 8
  br i1 %9, label %._crit_edge.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %wide.trip.count, 4294967288
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader.new ], [ %indvars.iv.next.7, %.lr.ph ]
  %.01618 = phi float [ 0.000000e+00, %.lr.ph.preheader.new ], [ %33, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.7, %.lr.ph ]
  %10 = getelementptr inbounds float, ptr %0, i64 %indvars.iv
  %11 = load float, ptr %10, align 4, !tbaa !5
  %12 = fadd float %.01618, %11
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %13 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.next
  %14 = load float, ptr %13, align 4, !tbaa !5
  %15 = fadd float %12, %14
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %16 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.next.1
  %17 = load float, ptr %16, align 4, !tbaa !5
  %18 = fadd float %15, %17
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %19 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.next.2
  %20 = load float, ptr %19, align 4, !tbaa !5
  %21 = fadd float %18, %20
  %indvars.iv.next.3 = or disjoint i64 %indvars.iv, 4
  %22 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.next.3
  %23 = load float, ptr %22, align 4, !tbaa !5
  %24 = fadd float %21, %23
  %indvars.iv.next.4 = or disjoint i64 %indvars.iv, 5
  %25 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.next.4
  %26 = load float, ptr %25, align 4, !tbaa !5
  %27 = fadd float %24, %26
  %indvars.iv.next.5 = or disjoint i64 %indvars.iv, 6
  %28 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.next.5
  %29 = load float, ptr %28, align 4, !tbaa !5
  %30 = fadd float %27, %29
  %indvars.iv.next.6 = or disjoint i64 %indvars.iv, 7
  %31 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.next.6
  %32 = load float, ptr %31, align 4, !tbaa !5
  %33 = fadd float %30, %32
  %indvars.iv.next.7 = add nuw nsw i64 %indvars.iv, 8
  %niter.next.7 = add i64 %niter, 8
  %niter.ncmp.7 = icmp eq i64 %niter.next.7, %unroll_iter
  br i1 %niter.ncmp.7, label %._crit_edge.unr-lcssa, label %.lr.ph, !llvm.loop !9

._crit_edge.unr-lcssa:                            ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa.ph = phi float [ poison, %.lr.ph.preheader ], [ %33, %.lr.ph ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next.7, %.lr.ph ]
  %.01618.unr = phi float [ 0.000000e+00, %.lr.ph.preheader ], [ %33, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.unr-lcssa, %.lr.ph.epil
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.lr.ph.epil ], [ %indvars.iv.unr, %._crit_edge.unr-lcssa ]
  %.01618.epil = phi float [ %36, %.lr.ph.epil ], [ %.01618.unr, %._crit_edge.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.unr-lcssa ]
  %34 = getelementptr inbounds float, ptr %0, i64 %indvars.iv.epil
  %35 = load float, ptr %34, align 4, !tbaa !5
  %36 = fadd float %.01618.epil, %35
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.lr.ph.epil, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph.epil, %._crit_edge.unr-lcssa
  %.lcssa = phi float [ %.lcssa.ph, %._crit_edge.unr-lcssa ], [ %36, %.lr.ph.epil ]
  %37 = fsub float %3, %2
  %38 = uitofp i32 %1 to float
  %39 = fdiv float %37, %38
  %40 = fmul float %39, %.lcssa
  br i1 %.not, label %._crit_edge23, label %.lr.ph22.preheader

.lr.ph22.preheader:                               ; preds = %._crit_edge
  %wide.trip.count29 = zext i32 %1 to i64
  %min.iters.check = icmp ult i32 %1, 4
  br i1 %min.iters.check, label %.lr.ph22.preheader32, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph22.preheader
  %n.vec = and i64 %wide.trip.count, 4294967292
  %broadcast.splatinsert = insertelement <4 x float> poison, float %40, 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 ]
  %41 = getelementptr inbounds float, ptr %0, i64 %index
  %wide.load = load <4 x float>, ptr %41, align 4, !tbaa !5
  %42 = fdiv <4 x float> %wide.load, %broadcast.splat
  store <4 x float> %42, ptr %41, align 4, !tbaa !5
  %index.next = add nuw i64 %index, 4
  %43 = icmp eq i64 %index.next, %n.vec
  br i1 %43, label %middle.block, label %vector.body, !llvm.loop !13

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge23, label %.lr.ph22.preheader32

.lr.ph22.preheader32:                             ; preds = %middle.block, %.lr.ph22.preheader
  %indvars.iv26.ph = phi i64 [ 0, %.lr.ph22.preheader ], [ %n.vec, %middle.block ]
  br label %.lr.ph22

.lr.ph22:                                         ; preds = %.lr.ph22.preheader32, %.lr.ph22
  %indvars.iv26 = phi i64 [ %indvars.iv.next27, %.lr.ph22 ], [ %indvars.iv26.ph, %.lr.ph22.preheader32 ]
  %44 = getelementptr inbounds float, ptr %0, i64 %indvars.iv26
  %45 = load float, ptr %44, align 4, !tbaa !5
  %46 = fdiv float %45, %40
  store float %46, ptr %44, align 4, !tbaa !5
  %indvars.iv.next27 = add nuw nsw i64 %indvars.iv26, 1
  %exitcond30.not = icmp eq i64 %indvars.iv.next27, %wide.trip.count29
  br i1 %exitcond30.not, label %._crit_edge23, label %.lr.ph22, !llvm.loop !16

._crit_edge23:                                    ; preds = %.lr.ph22, %middle.block, %._crit_edge.thread, %._crit_edge
  %47 = phi float [ %8, %._crit_edge.thread ], [ %40, %._crit_edge ], [ %40, %middle.block ], [ %40, %.lr.ph22 ]
  ret float %47
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: 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" }

!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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.unroll.disable"}
!13 = distinct !{!13, !10, !14, !15}
!14 = !{!"llvm.loop.isvectorized", i32 1}
!15 = !{!"llvm.loop.unroll.runtime.disable"}
!16 = distinct !{!16, !10, !15, !14}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass