; LLVM IR from Seeed-Studio/Seeed_Arduino_edgeimpulse :: src/edge-impulse-sdk/tensorflow/lite/micro (micro_utils)

; 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 @_ZN6tflite19SymmetricDequantizeEPKaifPf(ptr noundef %0, i32 noundef %1, float noundef %2, ptr noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca float, align 4
  %8 = alloca ptr, align 8
  %9 = 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 ptr %3, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %29, %4
  %11 = load i32, ptr %9, align 4, !tbaa !9
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %32

15:                                               ; preds = %10
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load i32, ptr %9, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds i8, ptr %16, i64 %18
  %20 = load i8, ptr %19, align 1, !tbaa !13
  %21 = sext i8 %20 to i32
  %22 = sitofp i32 %21 to float
  %23 = load float, ptr %7, align 4, !tbaa !11
  %24 = fmul float %22, %23
  %25 = load ptr, ptr %8, align 8, !tbaa !5
  %26 = load i32, ptr %9, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds float, ptr %25, i64 %27
  store float %24, ptr %28, align 4, !tbaa !11
  br label %29

29:                                               ; preds = %15
  %30 = load i32, ptr %9, align 4, !tbaa !9
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %9, align 4, !tbaa !9
  br label %10, !llvm.loop !14

32:                                               ; preds = %14
  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 = !{!"float", !7, i64 0}
!13 = !{!7, !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 nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @_ZN6tflite19SymmetricDequantizeEPKaifPf(ptr nocapture noundef readonly %0, i32 noundef %1, float noundef %2, ptr nocapture noundef writeonly %3) local_unnamed_addr #0 {
  %5 = icmp sgt i32 %1, 0
  br i1 %5, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %4
  %wide.trip.count = zext nneg i32 %1 to i64
  %min.iters.check = icmp ult i32 %1, 8
  br i1 %min.iters.check, label %.lr.ph.preheader11, label %vector.memcheck

.lr.ph.preheader11:                               ; 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, 3
  %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.preheader11, %.lr.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %.lr.ph.prol ], [ %indvars.iv.ph, %.lr.ph.preheader11 ]
  %prol.iter = phi i64 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader11 ]
  %6 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.prol
  %7 = load i8, ptr %6, align 1, !tbaa !5
  %8 = sitofp i8 %7 to float
  %9 = fmul float %8, %2
  %10 = getelementptr inbounds float, ptr %3, i64 %indvars.iv.prol
  store float %9, ptr %10, align 4, !tbaa !8
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol, !llvm.loop !10

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader11
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %.lr.ph.preheader11 ], [ %indvars.iv.next.prol, %.lr.ph.prol ]
  %11 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %12 = icmp ugt i64 %11, -4
  br i1 %12, label %._crit_edge, label %.lr.ph

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %13 = shl nuw nsw i64 %wide.trip.count, 2
  %scevgep = getelementptr i8, ptr %3, i64 %13
  %scevgep9 = getelementptr i8, ptr %0, i64 %wide.trip.count
  %bound0 = icmp ugt ptr %scevgep9, %3
  %bound1 = icmp ugt ptr %scevgep, %0
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %.lr.ph.preheader11, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %wide.trip.count, 2147483640
  %broadcast.splatinsert = insertelement <4 x float> poison, float %2, 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 ]
  %14 = getelementptr inbounds i8, ptr %0, i64 %index
  %15 = getelementptr inbounds i8, ptr %14, i64 4
  %wide.load = load <4 x i8>, ptr %14, align 1, !tbaa !5, !alias.scope !12
  %wide.load10 = load <4 x i8>, ptr %15, align 1, !tbaa !5, !alias.scope !12
  %16 = sitofp <4 x i8> %wide.load to <4 x float>
  %17 = sitofp <4 x i8> %wide.load10 to <4 x float>
  %18 = fmul <4 x float> %broadcast.splat, %16
  %19 = fmul <4 x float> %broadcast.splat, %17
  %20 = getelementptr inbounds float, ptr %3, i64 %index
  %21 = getelementptr inbounds i8, ptr %20, i64 16
  store <4 x float> %18, ptr %20, align 4, !tbaa !8, !alias.scope !15, !noalias !12
  store <4 x float> %19, ptr %21, align 4, !tbaa !8, !alias.scope !15, !noalias !12
  %index.next = add nuw i64 %index, 8
  %22 = icmp eq i64 %index.next, %n.vec
  br i1 %22, label %middle.block, label %vector.body, !llvm.loop !17

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.preheader11

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

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %.lr.ph ], [ %indvars.iv.unr, %.lr.ph.prol.loopexit ]
  %23 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %24 = load i8, ptr %23, align 1, !tbaa !5
  %25 = sitofp i8 %24 to float
  %26 = fmul float %25, %2
  %27 = getelementptr inbounds float, ptr %3, i64 %indvars.iv
  store float %26, ptr %27, align 4, !tbaa !8
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %28 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next
  %29 = load i8, ptr %28, align 1, !tbaa !5
  %30 = sitofp i8 %29 to float
  %31 = fmul float %30, %2
  %32 = getelementptr inbounds float, ptr %3, i64 %indvars.iv.next
  store float %31, ptr %32, align 4, !tbaa !8
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %33 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next.1
  %34 = load i8, ptr %33, align 1, !tbaa !5
  %35 = sitofp i8 %34 to float
  %36 = fmul float %35, %2
  %37 = getelementptr inbounds float, ptr %3, i64 %indvars.iv.next.1
  store float %36, ptr %37, align 4, !tbaa !8
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %38 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next.2
  %39 = load i8, ptr %38, align 1, !tbaa !5
  %40 = sitofp i8 %39 to float
  %41 = fmul float %40, %2
  %42 = getelementptr inbounds float, ptr %3, i64 %indvars.iv.next.2
  store float %41, ptr %42, align 4, !tbaa !8
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %wide.trip.count
  br i1 %exitcond.not.3, label %._crit_edge, label %.lr.ph, !llvm.loop !21
}

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" }

!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 = !{!"float", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.unroll.disable"}
!12 = !{!13}
!13 = distinct !{!13, !14}
!14 = distinct !{!14, !"LVerDomain"}
!15 = !{!16}
!16 = distinct !{!16, !14}
!17 = distinct !{!17, !18, !19, !20}
!18 = !{!"llvm.loop.mustprogress"}
!19 = !{!"llvm.loop.isvectorized", i32 1}
!20 = !{!"llvm.loop.unroll.runtime.disable"}
!21 = distinct !{!21, !18, !19}


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