; LLVM IR from tensorflow/tflite-micro :: signal/src/window.ll (ZN11tflm_signal11ApplyWindowEPKsS1_iiPs)

; 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: mustprogress nounwind uwtable
define dso_local void @_ZN11tflm_signal11ApplyWindowEPKsS1_iiPs(ptr noundef %0, ptr noundef %1, i32 noundef %2, i32 noundef %3, ptr noundef %4) #0 {
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store i32 %2, ptr %8, align 4, !tbaa !9
  store i32 %3, ptr %9, align 4, !tbaa !9
  store ptr %4, ptr %10, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  store i32 0, ptr %11, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %58, %5
  %14 = load i32, ptr %11, align 4, !tbaa !9
  %15 = load i32, ptr %8, align 4, !tbaa !9
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  br label %61

18:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #2
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = load i32, ptr %11, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i16, ptr %19, i64 %21
  %23 = load i16, ptr %22, align 2, !tbaa !11
  %24 = sext i16 %23 to i32
  %25 = load ptr, ptr %7, align 8, !tbaa !5
  %26 = load i32, ptr %11, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i16, ptr %25, i64 %27
  %29 = load i16, ptr %28, align 2, !tbaa !11
  %30 = sext i16 %29 to i32
  %31 = mul nsw i32 %24, %30
  %32 = load i32, ptr %9, align 4, !tbaa !9
  %33 = ashr i32 %31, %32
  store i32 %33, ptr %12, align 4, !tbaa !9
  %34 = load i32, ptr %12, align 4, !tbaa !9
  %35 = icmp slt i32 %34, -32768
  br i1 %35, label %36, label %41

36:                                               ; preds = %18
  %37 = load ptr, ptr %10, align 8, !tbaa !5
  %38 = load i32, ptr %11, align 4, !tbaa !9
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds i16, ptr %37, i64 %39
  store i16 -32768, ptr %40, align 2, !tbaa !11
  br label %57

41:                                               ; preds = %18
  %42 = load i32, ptr %12, align 4, !tbaa !9
  %43 = icmp sgt i32 %42, 32767
  br i1 %43, label %44, label %49

44:                                               ; preds = %41
  %45 = load ptr, ptr %10, align 8, !tbaa !5
  %46 = load i32, ptr %11, align 4, !tbaa !9
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds i16, ptr %45, i64 %47
  store i16 32767, ptr %48, align 2, !tbaa !11
  br label %56

49:                                               ; preds = %41
  %50 = load i32, ptr %12, align 4, !tbaa !9
  %51 = trunc i32 %50 to i16
  %52 = load ptr, ptr %10, align 8, !tbaa !5
  %53 = load i32, ptr %11, align 4, !tbaa !9
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds i16, ptr %52, i64 %54
  store i16 %51, ptr %55, align 2, !tbaa !11
  br label %56

56:                                               ; preds = %49, %44
  br label %57

57:                                               ; preds = %56, %36
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #2
  br label %58

58:                                               ; preds = %57
  %59 = load i32, ptr %11, align 4, !tbaa !9
  %60 = add nsw i32 %59, 1
  store i32 %60, ptr %11, align 4, !tbaa !9
  br label %13, !llvm.loop !13

61:                                               ; preds = %17
  ret void
}

; 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

attributes #0 = { 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 #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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"short", !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(argmem: readwrite) uwtable
define dso_local void @_ZN11tflm_signal11ApplyWindowEPKsS1_iiPs(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i32 noundef %2, i32 noundef %3, ptr nocapture noundef writeonly %4) local_unnamed_addr #0 {
  %6 = ptrtoint ptr %1 to i64
  %7 = ptrtoint ptr %0 to i64
  %8 = ptrtoint ptr %4 to i64
  %9 = icmp sgt i32 %2, 0
  br i1 %9, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %5
  %wide.trip.count = zext nneg i32 %2 to i64
  %min.iters.check = icmp ult i32 %2, 8
  br i1 %min.iters.check, label %.lr.ph.preheader24, label %vector.memcheck

.lr.ph.preheader24:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 0, %vector.memcheck ], [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 1
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader24
  %10 = getelementptr inbounds i16, ptr %0, i64 %indvars.iv.ph
  %11 = load i16, ptr %10, align 2, !tbaa !5
  %12 = sext i16 %11 to i32
  %13 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv.ph
  %14 = load i16, ptr %13, align 2, !tbaa !5
  %15 = sext i16 %14 to i32
  %16 = mul nsw i32 %15, %12
  %17 = ashr i32 %16, %3
  %spec.select20.prol = tail call i32 @llvm.smin.i32(i32 %17, i32 32767)
  %.sink21.prol = tail call i32 @llvm.smax.i32(i32 %spec.select20.prol, i32 -32768)
  %.sink.prol = trunc nsw i32 %.sink21.prol to i16
  %18 = getelementptr inbounds i16, ptr %4, i64 %indvars.iv.ph
  store i16 %.sink.prol, ptr %18, align 2, !tbaa !5
  %indvars.iv.next.prol = or disjoint i64 %indvars.iv.ph, 1
  br label %.lr.ph.prol.loopexit

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader24
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader24 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %19 = add nsw i64 %wide.trip.count, -1
  %20 = icmp eq i64 %indvars.iv.ph, %19
  br i1 %20, label %._crit_edge, label %.lr.ph

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %21 = sub i64 %8, %7
  %diff.check = icmp ult i64 %21, 16
  %22 = sub i64 %8, %6
  %diff.check22 = icmp ult i64 %22, 16
  %conflict.rdx = or i1 %diff.check, %diff.check22
  br i1 %conflict.rdx, label %.lr.ph.preheader24, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 2147483640
  %broadcast.splatinsert = insertelement <8 x i32> poison, i32 %3, i64 0
  %broadcast.splat = shufflevector <8 x i32> %broadcast.splatinsert, <8 x i32> poison, <8 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %23 = getelementptr inbounds i16, ptr %0, i64 %index
  %wide.load = load <8 x i16>, ptr %23, align 2, !tbaa !5
  %24 = sext <8 x i16> %wide.load to <8 x i32>
  %25 = getelementptr inbounds i16, ptr %1, i64 %index
  %wide.load23 = load <8 x i16>, ptr %25, align 2, !tbaa !5
  %26 = sext <8 x i16> %wide.load23 to <8 x i32>
  %27 = mul nsw <8 x i32> %26, %24
  %28 = ashr <8 x i32> %27, %broadcast.splat
  %29 = tail call <8 x i32> @llvm.smin.v8i32(<8 x i32> %28, <8 x i32> <i32 32767, i32 32767, i32 32767, i32 32767, i32 32767, i32 32767, i32 32767, i32 32767>)
  %30 = tail call <8 x i32> @llvm.smax.v8i32(<8 x i32> %29, <8 x i32> <i32 -32768, i32 -32768, i32 -32768, i32 -32768, i32 -32768, i32 -32768, i32 -32768, i32 -32768>)
  %31 = trunc nsw <8 x i32> %30 to <8 x i16>
  %32 = getelementptr inbounds i16, ptr %4, i64 %index
  store <8 x i16> %31, ptr %32, align 2, !tbaa !5
  %index.next = add nuw i64 %index, 8
  %33 = icmp eq i64 %index.next, %n.vec
  br i1 %33, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader24

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %5
  ret void

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %34 = getelementptr inbounds i16, ptr %0, i64 %indvars.iv
  %35 = load i16, ptr %34, align 2, !tbaa !5
  %36 = sext i16 %35 to i32
  %37 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv
  %38 = load i16, ptr %37, align 2, !tbaa !5
  %39 = sext i16 %38 to i32
  %40 = mul nsw i32 %39, %36
  %41 = ashr i32 %40, %3
  %spec.select20 = tail call i32 @llvm.smin.i32(i32 %41, i32 32767)
  %.sink21 = tail call i32 @llvm.smax.i32(i32 %spec.select20, i32 -32768)
  %.sink = trunc nsw i32 %.sink21 to i16
  %42 = getelementptr inbounds i16, ptr %4, i64 %indvars.iv
  store i16 %.sink, ptr %42, align 2, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %43 = getelementptr inbounds i16, ptr %0, i64 %indvars.iv.next
  %44 = load i16, ptr %43, align 2, !tbaa !5
  %45 = sext i16 %44 to i32
  %46 = getelementptr inbounds i16, ptr %1, i64 %indvars.iv.next
  %47 = load i16, ptr %46, align 2, !tbaa !5
  %48 = sext i16 %47 to i32
  %49 = mul nsw i32 %48, %45
  %50 = ashr i32 %49, %3
  %spec.select20.1 = tail call i32 @llvm.smin.i32(i32 %50, i32 32767)
  %.sink21.1 = tail call i32 @llvm.smax.i32(i32 %spec.select20.1, i32 -32768)
  %.sink.1 = trunc nsw i32 %.sink21.1 to i16
  %51 = getelementptr inbounds i16, ptr %4, i64 %indvars.iv.next
  store i16 %.sink.1, ptr %51, align 2, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %exitcond.not.1 = icmp eq i64 %indvars.iv.next.1, %wide.trip.count
  br i1 %exitcond.not.1, label %._crit_edge, label %.lr.ph, !llvm.loop !13
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smin.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <8 x i32> @llvm.smin.v8i32(<8 x i32>, <8 x i32>) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare <8 x i32> @llvm.smax.v8i32(<8 x i32>, <8 x i32>) #1

attributes #0 = { mustprogress 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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!"short", !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, !11}


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