; LLVM IR from Simple-XX/SimpleKernel :: src/kernel (io)

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

@buf = external dso_local global [512 x i8], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN2IO12get_instanceEv() #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i8 @_ZN2IO9get_colorEv(ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN2IO9set_colorEN5COLOR7color_tE(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef zeroext) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZN2IO12write_stringEPKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.va_start.p0(ptr) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.va_end.p0(ptr) #2

declare void @bzero(ptr noundef, i32 noundef) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

declare i32 @vsnprintf_(ptr noundef, i64 noundef, ptr noundef, ptr noundef) #3

; Function Attrs: mustprogress uwtable
define dso_local i32 @err(ptr noundef %0, ...) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i8, align 1
  %4 = alloca [1 x %struct.__va_list_tag], align 16
  %5 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %3) #4
  %6 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN2IO12get_instanceEv()
  %7 = call noundef zeroext i8 @_ZN2IO9get_colorEv(ptr noundef nonnull align 8 dereferenceable(8) %6)
  store i8 %7, ptr %3, align 1, !tbaa !9
  %8 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN2IO12get_instanceEv()
  call void @_ZN2IO9set_colorEN5COLOR7color_tE(ptr noundef nonnull align 8 dereferenceable(8) %8, i8 noundef zeroext 12)
  call void @llvm.lifetime.start.p0(i64 24, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  %9 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %4, i64 0, i64 0
  call void @llvm.va_start.p0(ptr %9)
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  %11 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %4, i64 0, i64 0
  %12 = call i32 @vsnprintf_(ptr noundef @buf, i64 noundef 512, ptr noundef %10, ptr noundef %11)
  store i32 %12, ptr %5, align 4, !tbaa !11
  %13 = getelementptr inbounds [1 x %struct.__va_list_tag], ptr %4, i64 0, i64 0
  call void @llvm.va_end.p0(ptr %13)
  %14 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN2IO12get_instanceEv()
  %15 = call noundef i32 @_ZN2IO12write_stringEPKc(ptr noundef nonnull align 8 dereferenceable(8) %14, ptr noundef @buf)
  call void @bzero(ptr noundef @buf, i32 noundef 512)
  %16 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN2IO12get_instanceEv()
  %17 = load i8, ptr %3, align 1, !tbaa !9
  call void @_ZN2IO9set_colorEN5COLOR7color_tE(ptr noundef nonnull align 8 dereferenceable(8) %16, i8 noundef zeroext %17)
  %18 = load i32, ptr %5, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 24, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 1, ptr %3) #4
  ret i32 %18
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nosync nounwind willreturn }
attributes #3 = { "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 #4 = { 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 = !{!"_ZTSN5COLOR7color_tE", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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"

%struct.__va_list_tag = type { i32, i32, ptr, ptr }

@buf = external dso_local global [512 x i8], align 16

; Function Attrs: mustprogress uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZN2IO12get_instanceEv() local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i8 @_ZN2IO9get_colorEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN2IO9set_colorEN5COLOR7color_tE(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef zeroext) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_ZN2IO12write_stringEPKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.va_start.p0(ptr) #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.va_end.p0(ptr) #2

declare void @bzero(ptr noundef, i32 noundef) local_unnamed_addr #3

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

declare i32 @vsnprintf_(ptr noundef, i64 noundef, ptr noundef, ptr noundef) local_unnamed_addr #3

; Function Attrs: mustprogress uwtable
define dso_local i32 @err(ptr noundef %0, ...) local_unnamed_addr #0 {
  %2 = alloca [1 x %struct.__va_list_tag], align 16
  %3 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZN2IO12get_instanceEv()
  %4 = tail call noundef zeroext i8 @_ZN2IO9get_colorEv(ptr noundef nonnull align 8 dereferenceable(8) %3)
  %5 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZN2IO12get_instanceEv()
  tail call void @_ZN2IO9set_colorEN5COLOR7color_tE(ptr noundef nonnull align 8 dereferenceable(8) %5, i8 noundef zeroext 12)
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %2) #4
  call void @llvm.va_start.p0(ptr nonnull %2)
  %6 = call i32 @vsnprintf_(ptr noundef nonnull @buf, i64 noundef 512, ptr noundef %0, ptr noundef nonnull %2)
  call void @llvm.va_end.p0(ptr nonnull %2)
  %7 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN2IO12get_instanceEv()
  %8 = call noundef i32 @_ZN2IO12write_stringEPKc(ptr noundef nonnull align 8 dereferenceable(8) %7, ptr noundef nonnull @buf)
  call void @bzero(ptr noundef nonnull @buf, i32 noundef 512)
  %9 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZN2IO12get_instanceEv()
  call void @_ZN2IO9set_colorEN5COLOR7color_tE(ptr noundef nonnull align 8 dereferenceable(8) %9, i8 noundef zeroext %4)
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %2) #4
  ret i32 %6
}

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nosync nounwind willreturn }
attributes #3 = { "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 #4 = { 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)"}


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