; LLVM IR from SSBMTonberry/pocketlzma :: ref_spec/lzma1900/CPP/Common/MyString.ll (ZN7AStringC2EjRKS_)

; 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.AString = type { ptr, i32, i32 }

; 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 uwtable
declare dso_local void @_ZN7AString11SetStartLenEj(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7AStringC2EjRKS_(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %1, ptr noundef nonnull align 8 dereferenceable(16) %2) unnamed_addr #1 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !5
  %7 = load ptr, ptr %4, align 8
  %8 = load i32, ptr %5, align 4, !tbaa !9
  %9 = load ptr, ptr %6, align 8, !tbaa !5
  %10 = getelementptr inbounds %class.AString, ptr %9, i32 0, i32 1
  %11 = load i32, ptr %10, align 8, !tbaa !11
  %12 = icmp ugt i32 %8, %11
  br i1 %12, label %13, label %17

13:                                               ; preds = %3
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = getelementptr inbounds %class.AString, ptr %14, i32 0, i32 1
  %16 = load i32, ptr %15, align 8, !tbaa !11
  store i32 %16, ptr %5, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %13, %3
  %18 = load i32, ptr %5, align 4, !tbaa !9
  call void @_ZN7AString11SetStartLenEj(ptr noundef nonnull align 8 dereferenceable(16) %7, i32 noundef %18)
  %19 = getelementptr inbounds %class.AString, ptr %7, i32 0, i32 0
  %20 = load ptr, ptr %19, align 8, !tbaa !13
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = getelementptr inbounds %class.AString, ptr %21, i32 0, i32 0
  %23 = load ptr, ptr %22, align 8, !tbaa !13
  %24 = load i32, ptr %5, align 4, !tbaa !9
  %25 = zext i32 %24 to i64
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %20, ptr align 1 %23, i64 %25, i1 false)
  %26 = getelementptr inbounds %class.AString, ptr %7, i32 0, i32 0
  %27 = load ptr, ptr %26, align 8, !tbaa !13
  %28 = load i32, ptr %5, align 4, !tbaa !9
  %29 = zext i32 %28 to i64
  %30 = getelementptr inbounds i8, ptr %27, i64 %29
  store i8 0, ptr %30, align 1, !tbaa !14
  ret void
}

attributes #0 = { nocallback nofree 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" }

!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, !10, i64 8}
!12 = !{!"_ZTS7AString", !6, i64 0, !10, i64 8, !10, i64 12}
!13 = !{!12, !6, i64 0}
!14 = !{!7, !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"

; 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 uwtable
declare dso_local void @_ZN7AString11SetStartLenEj(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7AStringC2EjRKS_(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %1, ptr nocapture noundef nonnull readonly align 8 dereferenceable(16) %2) unnamed_addr #1 align 2 {
  %4 = getelementptr inbounds i8, ptr %2, i64 8
  %5 = load i32, ptr %4, align 8, !tbaa !5
  %spec.select = tail call i32 @llvm.umin.i32(i32 %5, i32 %1)
  tail call void @_ZN7AString11SetStartLenEj(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %spec.select)
  %6 = load ptr, ptr %0, align 8, !tbaa !11
  %7 = load ptr, ptr %2, align 8, !tbaa !11
  %8 = zext i32 %spec.select to i64
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %6, ptr align 1 %7, i64 %8, i1 false)
  %9 = load ptr, ptr %0, align 8, !tbaa !11
  %10 = getelementptr inbounds i8, ptr %9, i64 %8
  store i8 0, ptr %10, align 1, !tbaa !12
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.umin.i32(i32, i32) #2

attributes #0 = { mustprogress nocallback nofree 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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, !10, i64 8}
!6 = !{!"_ZTS7AString", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!8, !8, i64 0}


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