; LLVM IR from thomasfla/Linux-ESPNOW :: ESPNOW_lib/src/ESPNOW_types.ll (ZN13ESPNOW_packet7toBytesEPhi)

; 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"

%struct.ESPNOW_packet = type { %struct.IEEE80211_radiotap, %struct.IEEE80211_wlan }
%struct.IEEE80211_radiotap = type <{ i8, i8, i16, i32, i8, i8, i16, i16 }>
%struct.IEEE80211_wlan = type <{ i8, i8, i16, [6 x i8], [6 x i8], [6 x i8], i16, %struct.IEEE80211_actionframe, i32 }>
%struct.IEEE80211_actionframe = type { i8, [3 x i8], [4 x i8], %struct.IEEE80211_vendorspecific }
%struct.IEEE80211_vendorspecific = type { i8, i8, [3 x i8], i8, i8, [250 x i8] }

@.str = external hidden unnamed_addr constant [23 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [88 x i8], align 1
@__PRETTY_FUNCTION__._ZN13ESPNOW_packet7toBytesEPhi = external hidden unnamed_addr constant [48 x i8], align 1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN13ESPNOW_packet7toBytesEPhi(ptr noundef nonnull align 1 dereferenceable(307) %0, ptr noundef %1, i32 noundef %2) #1 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = 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
  %8 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %9 = getelementptr inbounds %struct.ESPNOW_packet, ptr %8, i32 0, i32 1
  %10 = getelementptr inbounds %struct.IEEE80211_wlan, ptr %9, i32 0, i32 7
  %11 = getelementptr inbounds %struct.IEEE80211_actionframe, ptr %10, i32 0, i32 3
  %12 = getelementptr inbounds %struct.IEEE80211_vendorspecific, ptr %11, i32 0, i32 1
  %13 = load i8, ptr %12, align 1, !tbaa !11
  %14 = zext i8 %13 to i64
  %15 = add i64 307, %14
  %16 = sub i64 %15, 255
  %17 = trunc i64 %16 to i32
  store i32 %17, ptr %7, align 4, !tbaa !9
  %18 = load i32, ptr %7, align 4, !tbaa !9
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = icmp sle i32 %18, %19
  br i1 %20, label %21, label %22

21:                                               ; preds = %3
  br label %24

22:                                               ; preds = %3
  call void @__assert_fail(ptr noundef @.str, ptr noundef @.str.1, i32 noundef 28, ptr noundef @__PRETTY_FUNCTION__._ZN13ESPNOW_packet7toBytesEPhi) #5
  unreachable

23:                                               ; No predecessors!
  br label %24

24:                                               ; preds = %23, %21
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = load i32, ptr %7, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %25, ptr align 1 %8, i64 %27, i1 false)
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = load i32, ptr %7, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds i8, ptr %28, i64 %30
  %32 = getelementptr inbounds i8, ptr %31, i64 -4
  %33 = getelementptr inbounds %struct.ESPNOW_packet, ptr %8, i32 0, i32 1
  %34 = getelementptr inbounds %struct.IEEE80211_wlan, ptr %33, i32 0, i32 8
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %32, ptr align 1 %34, i64 4, i1 false)
  %35 = load i32, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  ret i32 %35
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #0 = { nocallback nofree 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { noreturn nounwind "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 #4 = { nounwind }
attributes #5 = { noreturn 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, !7, i64 47}
!12 = !{!"_ZTS13ESPNOW_packet", !13, i64 0, !15, i64 14}
!13 = !{!"_ZTS18IEEE80211_radiotap", !7, i64 0, !7, i64 1, !14, i64 2, !10, i64 4, !7, i64 8, !7, i64 9, !14, i64 10, !14, i64 12}
!14 = !{!"short", !7, i64 0}
!15 = !{!"_ZTS14IEEE80211_wlan", !7, i64 0, !7, i64 1, !14, i64 2, !7, i64 4, !7, i64 10, !7, i64 16, !14, i64 22, !16, i64 24, !10, i64 289}
!16 = !{!"_ZTS21IEEE80211_actionframe", !7, i64 0, !7, i64 1, !7, i64 4, !17, i64 8}
!17 = !{!"_ZTS24IEEE80211_vendorspecific", !7, i64 0, !7, i64 1, !7, i64 2, !7, i64 5, !7, i64 6, !7, i64 7}


; 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"

@.str = external hidden unnamed_addr constant [23 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [88 x i8], align 1
@__PRETTY_FUNCTION__._ZN13ESPNOW_packet7toBytesEPhi = external hidden unnamed_addr constant [48 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef range(i32 52, 308) i32 @_ZN13ESPNOW_packet7toBytesEPhi(ptr nocapture noundef nonnull readonly align 1 dereferenceable(307) %0, ptr nocapture noundef writeonly %1, i32 noundef %2) local_unnamed_addr #1 align 2 {
  %4 = getelementptr inbounds i8, ptr %0, i64 47
  %5 = load i8, ptr %4, align 1, !tbaa !5
  %6 = zext i8 %5 to i32
  %7 = add nuw nsw i32 %6, 52
  %.not = icmp sgt i32 %7, %2
  br i1 %.not, label %8, label %9

8:                                                ; preds = %3
  tail call void @__assert_fail(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 28, ptr noundef nonnull @__PRETTY_FUNCTION__._ZN13ESPNOW_packet7toBytesEPhi) #3
  unreachable

9:                                                ; preds = %3
  %10 = zext nneg i32 %7 to i64
  tail call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(1) %1, ptr noundef nonnull align 1 dereferenceable(1) %0, i64 %10, i1 false)
  %11 = getelementptr inbounds i8, ptr %1, i64 %10
  %12 = getelementptr inbounds i8, ptr %11, i64 -4
  %13 = getelementptr inbounds i8, ptr %0, i64 303
  %14 = load i32, ptr %13, align 1
  store i32 %14, ptr %12, align 1
  ret i32 %7
}

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nocallback nofree 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 = { noreturn nounwind "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 = { noreturn 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, !8, i64 47}
!6 = !{!"_ZTS13ESPNOW_packet", !7, i64 0, !12, i64 14}
!7 = !{!"_ZTS18IEEE80211_radiotap", !8, i64 0, !8, i64 1, !10, i64 2, !11, i64 4, !8, i64 8, !8, i64 9, !10, i64 10, !10, i64 12}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"short", !8, i64 0}
!11 = !{!"int", !8, i64 0}
!12 = !{!"_ZTS14IEEE80211_wlan", !8, i64 0, !8, i64 1, !10, i64 2, !8, i64 4, !8, i64 10, !8, i64 16, !10, i64 22, !13, i64 24, !11, i64 289}
!13 = !{!"_ZTS21IEEE80211_actionframe", !8, i64 0, !8, i64 1, !8, i64 4, !14, i64 8}
!14 = !{!"_ZTS24IEEE80211_vendorspecific", !8, i64 0, !8, i64 1, !8, i64 2, !8, i64 5, !8, i64 6, !8, i64 7}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass