; LLVM IR from achilles288/robot-monitor-graphics :: src/base/util/string.ll (ZN3rmg6StringC2EPKc)

; 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.rmg::String" = type <{ ptr, i16, i16, [4 x i8] }>

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN3rmg6StringC2EPKc(ptr noundef nonnull align 8 dereferenceable(12) %0, ptr noundef %1) unnamed_addr #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = call i64 @strlen(ptr noundef %6) #4
  %8 = trunc i64 %7 to i16
  %9 = getelementptr inbounds %"class.rmg::String", ptr %5, i32 0, i32 1
  store i16 %8, ptr %9, align 8, !tbaa !9
  %10 = getelementptr inbounds %"class.rmg::String", ptr %5, i32 0, i32 1
  %11 = load i16, ptr %10, align 8, !tbaa !9
  %12 = zext i16 %11 to i32
  %13 = add nsw i32 %12, 2
  %14 = trunc i32 %13 to i16
  %15 = getelementptr inbounds %"class.rmg::String", ptr %5, i32 0, i32 2
  store i16 %14, ptr %15, align 2, !tbaa !12
  %16 = getelementptr inbounds %"class.rmg::String", ptr %5, i32 0, i32 2
  %17 = load i16, ptr %16, align 2, !tbaa !12
  %18 = zext i16 %17 to i32
  %19 = add nsw i32 %18, 1
  %20 = sext i32 %19 to i64
  %21 = call noalias ptr @malloc(i64 noundef %20) #5
  %22 = getelementptr inbounds %"class.rmg::String", ptr %5, i32 0, i32 0
  store ptr %21, ptr %22, align 8, !tbaa !13
  %23 = getelementptr inbounds %"class.rmg::String", ptr %5, i32 0, i32 0
  %24 = load ptr, ptr %23, align 8, !tbaa !13
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds %"class.rmg::String", ptr %5, i32 0, i32 1
  %27 = load i16, ptr %26, align 8, !tbaa !9
  %28 = zext i16 %27 to i64
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %24, ptr align 1 %25, i64 %28, i1 false)
  %29 = getelementptr inbounds %"class.rmg::String", ptr %5, i32 0, i32 0
  %30 = load ptr, ptr %29, align 8, !tbaa !13
  %31 = getelementptr inbounds %"class.rmg::String", ptr %5, i32 0, i32 1
  %32 = load i16, ptr %31, align 8, !tbaa !9
  %33 = zext i16 %32 to i64
  %34 = getelementptr inbounds i8, ptr %30, i64 %33
  store i8 0, ptr %34, align 1, !tbaa !14
  ret void
}

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(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 = { nounwind allocsize(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 = { mustprogress 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 = { nounwind willreturn memory(read) "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 willreturn memory(read) }
attributes #5 = { nounwind allocsize(0) }

!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, !11, i64 8}
!10 = !{!"_ZTSN3rmg6StringE", !6, i64 0, !11, i64 8, !11, i64 10}
!11 = !{!"short", !7, i64 0}
!12 = !{!10, !11, i64 10}
!13 = !{!10, !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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn uwtable
define dso_local void @_ZN3rmg6StringC2EPKc(ptr nocapture noundef nonnull writeonly align 8 dereferenceable(12) %0, ptr nocapture noundef readonly %1) unnamed_addr #1 align 2 {
  %3 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %1) #4
  %4 = trunc i64 %3 to i16
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  store i16 %4, ptr %5, align 8, !tbaa !5
  %6 = add i16 %4, 2
  %7 = getelementptr inbounds i8, ptr %0, i64 10
  store i16 %6, ptr %7, align 2, !tbaa !11
  %8 = zext i16 %6 to i64
  %9 = add nuw nsw i64 %8, 1
  %10 = tail call noalias ptr @malloc(i64 noundef %9) #5
  store ptr %10, ptr %0, align 8, !tbaa !12
  %11 = and i64 %3, 65535
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %10, ptr align 1 %1, i64 %11, i1 false)
  %12 = getelementptr inbounds i8, ptr %10, i64 %11
  store i8 0, ptr %12, align 1, !tbaa !13
  ret void
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #2

; 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) #3

attributes #0 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { mustprogress nofree nounwind willreturn 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 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { nounwind willreturn memory(read) }
attributes #5 = { nounwind allocsize(0) }

!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 = !{!"_ZTSN3rmg6StringE", !7, i64 0, !10, i64 8, !10, i64 10}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"short", !8, i64 0}
!11 = !{!6, !10, i64 10}
!12 = !{!6, !7, i64 0}
!13 = !{!8, !8, i64 0}


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