; LLVM IR from thalium/icebox :: third_party/virtualbox/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Library (NetPseudoHeadChecksum)

; 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.NET_PSEUDO_HDR = type { i32, i32, i8, i8, i16 }

; 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
declare dso_local zeroext i16 @NetblockChecksum(ptr noundef, i32 noundef) #1

declare zeroext i16 @SwapBytes16(i16 noundef zeroext) #2

; Function Attrs: nounwind uwtable
define dso_local zeroext i16 @NetPseudoHeadChecksum(i32 noundef %0, i32 noundef %1, i8 noundef zeroext %2, i16 noundef zeroext %3) #1 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i8, align 1
  %8 = alloca i16, align 2
  %9 = alloca %struct.NET_PSEUDO_HDR, align 1
  store i32 %0, ptr %5, align 4, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !5
  store i8 %2, ptr %7, align 1, !tbaa !9
  store i16 %3, ptr %8, align 2, !tbaa !10
  call void @llvm.lifetime.start.p0(i64 12, ptr %9) #3
  %10 = call ptr @ZeroMem(ptr noundef %9, i64 noundef 12)
  %11 = load i32, ptr %5, align 4, !tbaa !5
  %12 = getelementptr inbounds %struct.NET_PSEUDO_HDR, ptr %9, i32 0, i32 0
  store i32 %11, ptr %12, align 1, !tbaa !12
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = getelementptr inbounds %struct.NET_PSEUDO_HDR, ptr %9, i32 0, i32 1
  store i32 %13, ptr %14, align 1, !tbaa !14
  %15 = load i8, ptr %7, align 1, !tbaa !9
  %16 = getelementptr inbounds %struct.NET_PSEUDO_HDR, ptr %9, i32 0, i32 3
  store i8 %15, ptr %16, align 1, !tbaa !15
  %17 = load i16, ptr %8, align 2, !tbaa !10
  %18 = call zeroext i16 @SwapBytes16(i16 noundef zeroext %17)
  %19 = getelementptr inbounds %struct.NET_PSEUDO_HDR, ptr %9, i32 0, i32 4
  store i16 %18, ptr %19, align 1, !tbaa !16
  %20 = call zeroext i16 @NetblockChecksum(ptr noundef %9, i32 noundef 12)
  call void @llvm.lifetime.end.p0(i64 12, ptr %9) #3
  ret i16 %20
}

declare ptr @ZeroMem(ptr noundef, i64 noundef) #2

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 = { "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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"short", !7, i64 0}
!12 = !{!13, !6, i64 0}
!13 = !{!"", !6, i64 0, !6, i64 4, !7, i64 8, !7, i64 9, !11, i64 10}
!14 = !{!13, !6, i64 4}
!15 = !{!13, !7, i64 9}
!16 = !{!13, !11, i64 10}


; 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.NET_PSEUDO_HDR = type { i32, i32, i8, i8, i16 }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local zeroext i16 @NetblockChecksum(ptr noundef, i32 noundef) local_unnamed_addr #1

declare zeroext i16 @SwapBytes16(i16 noundef zeroext) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
define dso_local zeroext i16 @NetPseudoHeadChecksum(i32 noundef %0, i32 noundef %1, i8 noundef zeroext %2, i16 noundef zeroext %3) local_unnamed_addr #1 {
  %5 = alloca %struct.NET_PSEUDO_HDR, align 4
  call void @llvm.lifetime.start.p0(i64 12, ptr nonnull %5) #3
  %6 = call ptr @ZeroMem(ptr noundef nonnull %5, i64 noundef 12) #3
  store i32 %0, ptr %5, align 4, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %5, i64 4
  store i32 %1, ptr %7, align 4, !tbaa !11
  %8 = getelementptr inbounds i8, ptr %5, i64 9
  store i8 %2, ptr %8, align 1, !tbaa !12
  %9 = call zeroext i16 @SwapBytes16(i16 noundef zeroext %3) #3
  %10 = getelementptr inbounds i8, ptr %5, i64 10
  store i16 %9, ptr %10, align 2, !tbaa !13
  %11 = call zeroext i16 @NetblockChecksum(ptr noundef nonnull %5, i32 noundef 12)
  call void @llvm.lifetime.end.p0(i64 12, ptr nonnull %5) #3
  ret i16 %11
}

declare ptr @ZeroMem(ptr noundef, i64 noundef) local_unnamed_addr #2

attributes #0 = { mustprogress 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 = { "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 = { 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, !7, i64 0}
!6 = !{!"", !7, i64 0, !7, i64 4, !8, i64 8, !8, i64 9, !10, i64 10}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"short", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = !{!6, !8, i64 9}
!13 = !{!6, !10, i64 10}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,SROAPass