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...adding some new code for th ARM/MC ELF emission, but noticed a curious linkage between th AsmPrinter and the MC. It looks like the MC code (on X86 at least) calls out to the (misnamed?) AsmPrinter to dump out ELF bits (in X86AsmPrinter.cpp) in the same routine, using conditional branching.... As JimG and I are working both on ARM emission stuff, I want to minimize chances of us stomping on each other - which probably means a refactoring the AsmPrinter hierarchy to contain a common ABC. This approach seems like the right one to take, but it itself is a "big" nonlocal change, so I wante...

...MAsmPrinter for MC/ELF, and had some questions. Currently, it defines quite a few methods like printAddrMode4Operand (linked to ARMInstrInfo.td) that currently assume raw text support in the OutStreamer. Are these methods still supposed to be invoked in the MC'ized path for assembly output? Is JimG's new MC/.s ARMAsmPrinter::EmitInstruction() somehow bypassing these completely? and also on EmitStartOfAsmFile(), it emits a bunch of text assembly attributes - which is clearly wrong for MC (but is still being used in the asm emission). Can anyone suggest a better mechanism to switch on thi...

...f setting out subsection > sizes after the fact? I am guessing I need to use an MCFixup? > How do I get an MCExpr to evaluate a method for the subsection size? > Is there an equivalent use in the places using MCFixup? > Do I need to add a new subclass to MCExpr for doing this? > > JimG, can you please comment on the MachO specific parts in the > ARMAsmPrinter.cpp? Is there an example of a "subsection size" that is > "Fixed up" after all the blobs that go into that subsection are > emitted? The closest examples I could find weren't that close :-( &...

...preferred method for MC way of setting out subsection sizes after the fact? I am guessing I need to use an MCFixup? How do I get an MCExpr to evaluate a method for the subsection size? Is there an equivalent use in the places using MCFixup? Do I need to add a new subclass to MCExpr for doing this? JimG, can you please comment on the MachO specific parts in the ARMAsmPrinter.cpp? Is there an example of a "subsection size" that is "Fixed up" after all the blobs that go into that subsection are emitted? The closest examples I could find weren't that close :-( (Matter of fact,...

...d some questions. > > Currently, it defines quite a few methods like printAddrMode4Operand > (linked to ARMInstrInfo.td) that currently assume raw text support in > the OutStreamer. Are these methods still supposed to be invoked in the > MC'ized path for assembly output? > Is JimG's new MC/.s ARMAsmPrinter::EmitInstruction() somehow bypassing > these completely? > The ones in ARMAsmPrinter.cpp are now effectively unused, and I'll be removing them soon. I just need to do a bit of tablegen hacking first to be able to do so. The MC versions are in AsmPrinter/ARM...

> Hmm, I wish we had this discussion way earlier.. > > How would I emit things in different subsections? I can do a high > level switch to .ARM.attributes, and if I were emitting one blob from > begin to end, using the higher level interface would be preferable, > but it contains additional subsections - which are naturally > represented by MCDataFragments - Is there an MC

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...>> sizes after the fact? I am guessing I need to use an MCFixup? >> How do I get an MCExpr to evaluate a method for the subsection size? >> Is there an equivalent use in the places using MCFixup? >> Do I need to add a new subclass to MCExpr for doing this? >> >> JimG, can you please comment on the MachO specific parts in the >> ARMAsmPrinter.cpp? Is there an example of a "subsection size" that is >> "Fixed up" after all the blobs that go into that subsection are >> emitted? The closest examples I could find weren't that...

...r the fact? I am guessing I need to use an MCFixup? >>> How do I get an MCExpr to evaluate a method for the subsection size? >>> Is there an equivalent use in the places using MCFixup? >>> Do I need to add a new subclass to MCExpr for doing this? >>> >>> JimG, can you please comment on the MachO specific parts in the >>> ARMAsmPrinter.cpp? Is there an example of a "subsection size" that is >>> "Fixed up" after all the blobs that go into that subsection are >>> emitted? The closest examples I could find were...

On Wed, Oct 20, 2010 at 2:56 PM, Rafael Espíndola <rafael.espindola at gmail.com> wrote: >> Gosh, this is taking a while :-) >> Is there anything else I missed? > > Another one I noticed. Instead of > >      SmallString<32> *FC = &currFileFragment.getContents(); >      (*FC) += static_cast<char>(attr); >      (*FC) += static_cast<char>(0xFF