; LLVM IR from lich0821/WeChatFerry :: WeChatFerry/rpc/nanopb (pb_encode)

; 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.pb_ostream_s = type { ptr, ptr, i64, i64, ptr }

; Function Attrs: nounwind uwtable
define dso_local void @pb_ostream_from_buffer(ptr dead_on_unwind noalias writable sret(%struct.pb_ostream_s) align 8 %0, ptr noundef %1, i64 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  store ptr %1, ptr %4, align 8, !tbaa !5
  store i64 %2, ptr %5, align 8, !tbaa !9
  %6 = getelementptr inbounds %struct.pb_ostream_s, ptr %0, i32 0, i32 0
  store ptr @buf_write, ptr %6, align 8, !tbaa !11
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.pb_ostream_s, ptr %0, i32 0, i32 1
  store ptr %7, ptr %8, align 8, !tbaa !13
  %9 = load i64, ptr %5, align 8, !tbaa !9
  %10 = getelementptr inbounds %struct.pb_ostream_s, ptr %0, i32 0, i32 2
  store i64 %9, ptr %10, align 8, !tbaa !14
  %11 = getelementptr inbounds %struct.pb_ostream_s, ptr %0, i32 0, i32 3
  store i64 0, ptr %11, align 8, !tbaa !15
  %12 = getelementptr inbounds %struct.pb_ostream_s, ptr %0, i32 0, i32 4
  store ptr null, ptr %12, align 8, !tbaa !16
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden zeroext i1 @buf_write(ptr noundef, ptr noundef, i64 noundef) #0

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" }

!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 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"pb_ostream_s", !6, i64 0, !6, i64 8, !10, i64 16, !10, i64 24, !6, i64 32}
!13 = !{!12, !6, i64 8}
!14 = !{!12, !10, i64 16}
!15 = !{!12, !10, i64 24}
!16 = !{!12, !6, i64 32}


; 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.pb_ostream_s = type { ptr, ptr, i64, i64, ptr }

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) uwtable
define dso_local void @pb_ostream_from_buffer(ptr dead_on_unwind noalias nocapture writable writeonly sret(%struct.pb_ostream_s) align 8 %0, ptr noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  store ptr @buf_write, ptr %0, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  store ptr %1, ptr %4, align 8, !tbaa !11
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  store i64 %2, ptr %5, align 8, !tbaa !12
  %6 = getelementptr inbounds i8, ptr %0, i64 24
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %6, i8 0, i64 16, i1 false)
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden zeroext i1 @buf_write(ptr noundef, ptr noundef, i64 noundef) #1

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) 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 = { 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 nounwind willreturn memory(argmem: write) }

!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 = !{!"pb_ostream_s", !7, i64 0, !7, i64 8, !10, i64 16, !10, i64 24, !7, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !7, i64 8}
!12 = !{!6, !10, i64 16}


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