; LLVM IR from thomasfla/Linux-ESPNOW :: wifiRawEcho/src (ESPNOW_packet)

; 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, [127 x i8] }

@.str = external hidden unnamed_addr constant [17 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [88 x i8], align 1
@__PRETTY_FUNCTION__.packet_to_bytes = external hidden unnamed_addr constant [51 x i8], align 1

; 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 i32 @packet_to_bytes(ptr noundef %0, i32 noundef %1, ptr noundef byval(%struct.ESPNOW_packet) align 8 %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 184, ptr %6, align 4, !tbaa !9
  %7 = load i32, ptr %5, align 4, !tbaa !9
  %8 = load i32, ptr %6, align 4, !tbaa !9
  %9 = icmp sgt i32 %7, %8
  br i1 %9, label %10, label %11

10:                                               ; preds = %3
  br label %12

11:                                               ; preds = %3
  call void @__assert_fail(ptr noundef @.str, ptr noundef @.str.1, i32 noundef 52, ptr noundef @__PRETTY_FUNCTION__.packet_to_bytes) #5
  unreachable

12:                                               ; preds = %10
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %13, ptr align 8 %2, i64 %15, i1 false)
  %16 = load i32, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  ret i32 %16
}

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

; 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) #3

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 = { 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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; 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"

%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, [127 x i8] }

@.str = external hidden unnamed_addr constant [17 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [88 x i8], align 1
@__PRETTY_FUNCTION__.packet_to_bytes = external hidden unnamed_addr constant [51 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @packet_to_bytes(ptr nocapture noundef writeonly %0, i32 noundef %1, ptr nocapture noundef readonly byval(%struct.ESPNOW_packet) align 8 %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %1, 184
  br i1 %4, label %6, label %5

5:                                                ; preds = %3
  tail call void @__assert_fail(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 52, ptr noundef nonnull @__PRETTY_FUNCTION__.packet_to_bytes) #3
  unreachable

6:                                                ; preds = %3
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(184) %0, ptr noundef nonnull align 8 dereferenceable(184) %2, i64 184, i1 false)
  ret i32 184
}

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

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 = { 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 #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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)"}


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