zahiraam added inline comments.
================
Comment at: clang/lib/CodeGen/CodeGenModule.cpp:5006
+ if (NeedsGlobalCtor || NeedsGlobalDtor)
+ DelayedCXXInitPosition[D] = ~0U;
+ } else {
----------------
efriedma wrote:
> zahiraam wrote:
> > efriedma wrote:
> > > zahiraam wrote:
> > > > efriedma wrote:
> > > > > zahiraam wrote:
> > > > > > Do you agree this should be done only when one of those flags is on?
> > > > > Yes, that's fine; I wasn't really paying close attention to the exact
> > > > > code. Just wanted to make the point about the structure of the if
> > > > > statements, and code was the easiest way to explain it.
> > > > >
> > > > > Maybe the outer if statement should actually be `if (isStaticInit(D,
> > > > > getLangOpts()) && NeedsGlobalCtor) {`.
> > > > >
> > > > > On a related note, we might want to avoid the name "ctor", in case
> > > > > that accidentally conflicts with some user code; an "__"-prefixed
> > > > > name would be appropriate.
> > > > >> Maybe the outer if statement should actually be if (isStaticInit(D,
> > > > >> getLangOpts()) && NeedsGlobalCtor) {
> > > > Not sure about that! There are cases where (isStaticInit(D,
> > > > getLangOpts())) = true and NeedsGlobalCtor=false, but
> > > > NeedsGlobalDtor=true. In which case a __dtor needs to be emitted, no?
> > > >
> > > > Writing the condition as you are proposing would actually not get me
> > > > into the body to emit the __dtor. Is that what we want?
> > > EmitCXXGlobalVarDeclInitFunc should be able to handle that case.
> > >
> > > Looking again, I'm a little concerned that in the isStaticInit() case,
> > > we're skipping a bunch of the logic in EmitCXXGlobalVarDeclInitFunc.
> > > EmitCXXCtorInit handles the basic cases correctly, but there are a lot of
> > > special cases in EmitCXXGlobalVarDeclInitFunc.
> > I have left the condition as it was to make sure no cases are left. What
> > other cases are you thinking of?
> >
> EmitCXXGlobalVarDeclInitFunc has special cases for CUDA, OpenMP, thread-local
> variables, the InitSeg attribute, and inline variables.
Let me know if this works? I have added one additional LIT test. I referred to
https://learn.microsoft.com/en-us/cpp/cpp/storage-classes-cpp?view=msvc-170#thread_local
for thread_local.
For the inline variables, I couldn't find much information about initialization
of inline variables. I tried to find a case that wouldn't pass by the new code
and wouldn't pass by EmitCXXGlobalVarDeclInitFunc, but no success.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D137107/new/
https://reviews.llvm.org/D137107
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