; LLVM IR from dynexcoin/Dynex :: src/P2p/LevinProtocol.ll (ZN7DynexCN13LevinProtocol10readStrictEPhm)

; 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"

%"class.DynexCN::LevinProtocol" = type { ptr }

; 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: mustprogress uwtable
define dso_local noundef zeroext i1 @_ZN7DynexCN13LevinProtocol10readStrictEPhm(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef %1, i64 noundef %2) #1 align 2 {
  %4 = alloca i1, align 1
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !9
  %11 = load ptr, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 0, ptr %8, align 8, !tbaa !9
  br label %12

12:                                               ; preds = %35, %3
  %13 = load i64, ptr %8, align 8, !tbaa !9
  %14 = load i64, ptr %7, align 8, !tbaa !9
  %15 = icmp ult i64 %13, %14
  br i1 %15, label %16, label %36

16:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %17 = getelementptr inbounds %"class.DynexCN::LevinProtocol", ptr %11, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !11
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = load i64, ptr %8, align 8, !tbaa !9
  %21 = getelementptr inbounds i8, ptr %19, i64 %20
  %22 = load i64, ptr %7, align 8, !tbaa !9
  %23 = load i64, ptr %8, align 8, !tbaa !9
  %24 = sub i64 %22, %23
  %25 = call noundef i64 @_ZN6System13TcpConnection4readEPhm(ptr noundef nonnull align 8 dereferenceable(32) %18, ptr noundef %21, i64 noundef %24)
  store i64 %25, ptr %9, align 8, !tbaa !9
  %26 = load i64, ptr %9, align 8, !tbaa !9
  %27 = icmp eq i64 %26, 0
  br i1 %27, label %28, label %29

28:                                               ; preds = %16
  store i1 false, ptr %4, align 1
  store i32 1, ptr %10, align 4
  br label %33

29:                                               ; preds = %16
  %30 = load i64, ptr %9, align 8, !tbaa !9
  %31 = load i64, ptr %8, align 8, !tbaa !9
  %32 = add i64 %31, %30
  store i64 %32, ptr %8, align 8, !tbaa !9
  store i32 0, ptr %10, align 4
  br label %33

33:                                               ; preds = %29, %28
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  %34 = load i32, ptr %10, align 4
  switch i32 %34, label %37 [
    i32 0, label %35
  ]

35:                                               ; preds = %33
  br label %12, !llvm.loop !13

36:                                               ; preds = %12
  store i1 true, ptr %4, align 1
  store i32 1, ptr %10, align 4
  br label %37

37:                                               ; preds = %36, %33
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %38 = load i1, ptr %4, align 1
  ret i1 %38
}

declare noundef i64 @_ZN6System13TcpConnection4readEPhm(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef, i64 noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTSN7DynexCN13LevinProtocolE", !6, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: mustprogress uwtable
define dso_local noundef zeroext i1 @_ZN7DynexCN13LevinProtocol10readStrictEPhm(ptr nocapture noundef nonnull readonly align 8 dereferenceable(8) %0, ptr noundef %1, i64 noundef %2) local_unnamed_addr #0 align 2 {
  br label %4

4:                                                ; preds = %5, %3
  %.012 = phi i64 [ 0, %3 ], [ %10, %5 ]
  %.not16 = icmp uge i64 %.012, %2
  br i1 %.not16, label %11, label %5

5:                                                ; preds = %4
  %6 = load ptr, ptr %0, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %1, i64 %.012
  %8 = sub i64 %2, %.012
  %9 = tail call noundef i64 @_ZN6System13TcpConnection4readEPhm(ptr noundef nonnull align 8 dereferenceable(32) %6, ptr noundef %7, i64 noundef %8)
  %.not = icmp eq i64 %9, 0
  %10 = add i64 %9, %.012
  br i1 %.not, label %11, label %4, !llvm.loop !10

11:                                               ; preds = %4, %5
  ret i1 %.not16
}

declare noundef i64 @_ZN6System13TcpConnection4readEPhm(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef, i64 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress 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 = { "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, !7, i64 0}
!6 = !{!"_ZTSN7DynexCN13LevinProtocolE", !7, i64 0}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass