; LLVM IR from Seeed-Studio/Seeed_Arduino_edgeimpulse :: src/edge-impulse-sdk/CMSIS/NN/Source/NNSupportFunctions (shift)

; 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: nounwind uwtable
define dso_local void @arm_q7_to_q15_no_shift(ptr noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %9, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %10 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %10, ptr %8, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %14, %3
  %12 = load i32, ptr %8, align 4, !tbaa !9
  %13 = icmp ugt i32 %12, 0
  br i1 %13, label %14, label %23

14:                                               ; preds = %11
  %15 = load ptr, ptr %7, align 8, !tbaa !5
  %16 = getelementptr inbounds i8, ptr %15, i32 1
  store ptr %16, ptr %7, align 8, !tbaa !5
  %17 = load i8, ptr %15, align 1, !tbaa !11
  %18 = sext i8 %17 to i16
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds i16, ptr %19, i32 1
  store ptr %20, ptr %5, align 8, !tbaa !5
  store i16 %18, ptr %19, align 2, !tbaa !12
  %21 = load i32, ptr %8, align 4, !tbaa !9
  %22 = add i32 %21, -1
  store i32 %22, ptr %8, align 4, !tbaa !9
  br label %11, !llvm.loop !14

23:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"short", !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: nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @arm_q7_to_q15_no_shift(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not7 = icmp eq i32 %2, 0
  br i1 %.not7, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %4 = zext i32 %2 to i64
  %min.iters.check = icmp ult i32 %2, 24
  br i1 %min.iters.check, label %.lr.ph.preheader20, label %vector.memcheck

vector.memcheck:                                  ; preds = %.lr.ph.preheader
  %5 = add i32 %2, -1
  %6 = zext i32 %5 to i64
  %7 = shl nuw nsw i64 %6, 1
  %8 = getelementptr i8, ptr %1, i64 %7
  %scevgep = getelementptr i8, ptr %8, i64 2
  %9 = zext i32 %2 to i64
  %scevgep11 = getelementptr i8, ptr %0, i64 %9
  %bound0 = icmp ugt ptr %scevgep11, %1
  %bound1 = icmp ugt ptr %scevgep, %0
  %found.conflict = and i1 %bound0, %bound1
  br i1 %found.conflict, label %.lr.ph.preheader20, label %vector.ph

vector.ph:                                        ; preds = %vector.memcheck
  %n.vec = and i64 %4, 4294967280
  %.cast = trunc nuw i64 %n.vec to i32
  %ind.end = sub i32 %2, %.cast
  %ind.end12 = getelementptr i8, ptr %0, i64 %n.vec
  %10 = shl nuw nsw i64 %n.vec, 1
  %ind.end14 = getelementptr i8, ptr %1, i64 %10
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %next.gep = getelementptr i8, ptr %0, i64 %index
  %offset.idx = shl i64 %index, 1
  %next.gep17 = getelementptr i8, ptr %1, i64 %offset.idx
  %11 = getelementptr i8, ptr %next.gep, i64 8
  %wide.load = load <8 x i8>, ptr %next.gep, align 1, !tbaa !5, !alias.scope !8
  %wide.load19 = load <8 x i8>, ptr %11, align 1, !tbaa !5, !alias.scope !8
  %12 = sext <8 x i8> %wide.load to <8 x i16>
  %13 = sext <8 x i8> %wide.load19 to <8 x i16>
  %14 = getelementptr i8, ptr %next.gep17, i64 16
  store <8 x i16> %12, ptr %next.gep17, align 2, !tbaa !11, !alias.scope !13, !noalias !8
  store <8 x i16> %13, ptr %14, align 2, !tbaa !11, !alias.scope !13, !noalias !8
  %index.next = add nuw i64 %index, 16
  %15 = icmp eq i64 %index.next, %n.vec
  br i1 %15, label %middle.block, label %vector.body, !llvm.loop !15

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %4
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader20

.lr.ph.preheader20:                               ; preds = %middle.block, %vector.memcheck, %.lr.ph.preheader
  %.010.ph = phi i32 [ %2, %vector.memcheck ], [ %2, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  %.059.ph = phi ptr [ %0, %vector.memcheck ], [ %0, %.lr.ph.preheader ], [ %ind.end12, %middle.block ]
  %.068.ph = phi ptr [ %1, %vector.memcheck ], [ %1, %.lr.ph.preheader ], [ %ind.end14, %middle.block ]
  %16 = add i32 %.010.ph, -1
  %xtraiter = and i32 %.010.ph, 7
  %lcmp.mod.not = icmp eq i32 %xtraiter, 0
  br i1 %lcmp.mod.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol

.lr.ph.prol:                                      ; preds = %.lr.ph.preheader20, %.lr.ph.prol
  %.010.prol = phi i32 [ %21, %.lr.ph.prol ], [ %.010.ph, %.lr.ph.preheader20 ]
  %.059.prol = phi ptr [ %17, %.lr.ph.prol ], [ %.059.ph, %.lr.ph.preheader20 ]
  %.068.prol = phi ptr [ %20, %.lr.ph.prol ], [ %.068.ph, %.lr.ph.preheader20 ]
  %prol.iter = phi i32 [ %prol.iter.next, %.lr.ph.prol ], [ 0, %.lr.ph.preheader20 ]
  %17 = getelementptr inbounds i8, ptr %.059.prol, i64 1
  %18 = load i8, ptr %.059.prol, align 1, !tbaa !5
  %19 = sext i8 %18 to i16
  %20 = getelementptr inbounds i8, ptr %.068.prol, i64 2
  store i16 %19, ptr %.068.prol, align 2, !tbaa !11
  %21 = add i32 %.010.prol, -1
  %prol.iter.next = add i32 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i32 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %.lr.ph.prol.loopexit, label %.lr.ph.prol, !llvm.loop !19

.lr.ph.prol.loopexit:                             ; preds = %.lr.ph.prol, %.lr.ph.preheader20
  %.010.unr = phi i32 [ %.010.ph, %.lr.ph.preheader20 ], [ %21, %.lr.ph.prol ]
  %.059.unr = phi ptr [ %.059.ph, %.lr.ph.preheader20 ], [ %17, %.lr.ph.prol ]
  %.068.unr = phi ptr [ %.068.ph, %.lr.ph.preheader20 ], [ %20, %.lr.ph.prol ]
  %22 = icmp ult i32 %16, 7
  br i1 %22, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.prol.loopexit, %.lr.ph
  %.010 = phi i32 [ %55, %.lr.ph ], [ %.010.unr, %.lr.ph.prol.loopexit ]
  %.059 = phi ptr [ %51, %.lr.ph ], [ %.059.unr, %.lr.ph.prol.loopexit ]
  %.068 = phi ptr [ %54, %.lr.ph ], [ %.068.unr, %.lr.ph.prol.loopexit ]
  %23 = getelementptr inbounds i8, ptr %.059, i64 1
  %24 = load i8, ptr %.059, align 1, !tbaa !5
  %25 = sext i8 %24 to i16
  %26 = getelementptr inbounds i8, ptr %.068, i64 2
  store i16 %25, ptr %.068, align 2, !tbaa !11
  %27 = getelementptr inbounds i8, ptr %.059, i64 2
  %28 = load i8, ptr %23, align 1, !tbaa !5
  %29 = sext i8 %28 to i16
  %30 = getelementptr inbounds i8, ptr %.068, i64 4
  store i16 %29, ptr %26, align 2, !tbaa !11
  %31 = getelementptr inbounds i8, ptr %.059, i64 3
  %32 = load i8, ptr %27, align 1, !tbaa !5
  %33 = sext i8 %32 to i16
  %34 = getelementptr inbounds i8, ptr %.068, i64 6
  store i16 %33, ptr %30, align 2, !tbaa !11
  %35 = getelementptr inbounds i8, ptr %.059, i64 4
  %36 = load i8, ptr %31, align 1, !tbaa !5
  %37 = sext i8 %36 to i16
  %38 = getelementptr inbounds i8, ptr %.068, i64 8
  store i16 %37, ptr %34, align 2, !tbaa !11
  %39 = getelementptr inbounds i8, ptr %.059, i64 5
  %40 = load i8, ptr %35, align 1, !tbaa !5
  %41 = sext i8 %40 to i16
  %42 = getelementptr inbounds i8, ptr %.068, i64 10
  store i16 %41, ptr %38, align 2, !tbaa !11
  %43 = getelementptr inbounds i8, ptr %.059, i64 6
  %44 = load i8, ptr %39, align 1, !tbaa !5
  %45 = sext i8 %44 to i16
  %46 = getelementptr inbounds i8, ptr %.068, i64 12
  store i16 %45, ptr %42, align 2, !tbaa !11
  %47 = getelementptr inbounds i8, ptr %.059, i64 7
  %48 = load i8, ptr %43, align 1, !tbaa !5
  %49 = sext i8 %48 to i16
  %50 = getelementptr inbounds i8, ptr %.068, i64 14
  store i16 %49, ptr %46, align 2, !tbaa !11
  %51 = getelementptr inbounds i8, ptr %.059, i64 8
  %52 = load i8, ptr %47, align 1, !tbaa !5
  %53 = sext i8 %52 to i16
  %54 = getelementptr inbounds i8, ptr %.068, i64 16
  store i16 %53, ptr %50, align 2, !tbaa !11
  %55 = add i32 %.010, -8
  %.not.7 = icmp eq i32 %55, 0
  br i1 %.not.7, label %._crit_edge, label %.lr.ph, !llvm.loop !21

._crit_edge:                                      ; preds = %.lr.ph.prol.loopexit, %.lr.ph, %middle.block, %3
  ret void
}

attributes #0 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9}
!9 = distinct !{!9, !10}
!10 = distinct !{!10, !"LVerDomain"}
!11 = !{!12, !12, i64 0}
!12 = !{!"short", !6, i64 0}
!13 = !{!14}
!14 = distinct !{!14, !10}
!15 = distinct !{!15, !16, !17, !18}
!16 = !{!"llvm.loop.mustprogress"}
!17 = !{!"llvm.loop.isvectorized", i32 1}
!18 = !{!"llvm.loop.unroll.runtime.disable"}
!19 = distinct !{!19, !20}
!20 = !{!"llvm.loop.unroll.disable"}
!21 = distinct !{!21, !16, !17}


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