[llvm-dev] Removing LLVM_ALWAYS_INLINE from ADT classes

PaweĊ‚ Bylica via llvm-dev llvm-dev at lists.llvm.org
Fri Jan 4 15:51:31 PST 2019


On Sat, Jan 5, 2019 at 12:38 AM Duncan P. N. Exon Smith via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> This makes sense to me.
>
> One concern is that this in itself will slow down the build, since
> tablegen will get even slower.  Ideally, there would be some (perhaps
> default?) configuration where we build the tablegen binaries with
> optimizations on and then use them in the build, as if we were
> cross-compiling.
>

Maybe something simple like -DLLVM_OPTIMIZE_TABLEGEN=ON (enabled by default
for Debug builds). You would need to set it to off only if you want to
debug tablegen.


>
> > On Jan 4, 2019, at 15:14, Davide Italiano via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
> >
> > Hi,
> > I would like to propose, based on a previous discussion on llvm-dev,
> > the following change.
> > https://reviews.llvm.org/D56337
> >
> > The main motivation for annotating member functions of ADT clases with
> > LLVM_ALWAYS_INLINE  was that of speeding up `check-llvm` at `-O0`.
> > Turns out this significantly degrades the debuggability of fundamental
> > classes in llvm itself, e.g. StringRef or SmallVector.
> >
> > After discussing we agreed that it's reasonable to drop
> > LLVM_ALWYAS_INLINE from ADT classes  member functions and add a note
> > in the developer's manual.
> >
> > If you have any feedbacks or concerns, please speak up.
> > If nothing major arises, I'm going to commit this patch in a week (or
> such).
> >
> > Thanks for your time,
> >
> > --
> > Davide
> >
> > "There are no solved problems; there are only problems that are more
> > or less solved" -- Henri Poincare
> > _______________________________________________
> > LLVM Developers mailing list
> > llvm-dev at lists.llvm.org
> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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