search for: readonlysect

Hi, In the document: http://llvm.org/docs/WritingAnLLVMBackend.html described example like: SparcTargetAsmInfo::SparcTargetAsmInfo(const SparcTargetMachine &TM) { Data16bitsDirective = "\t.half\t"; Data32bitsDirective = "\t.word\t"; Data64bitsDirective = 0; // .xword is only supported by V9. ZeroDirective = "\t.skip\t"; CommentString = "!";

Hello > I really need in my backend value for this section, distinct from > default. Where can I set it? It was renamed to ReadOnlySection. You might want to check the logic inside CodeGen/TargetLoweringObjectFileImp.cpp (in particular - TargetLoweringObjectFile::SelectionSectionForGlobal) to see how it's used. -- With best regards, Anton Korobeynikov Faculty of Mathematics and Mechanics, Saint Petersburg State University

Hi Elena, > (2) Proposal > Define one more Code Model, let's say "LargeNearConst", which will allow to put constants in .text. Isn't that a little heavy-handed? The large model only requires the less efficient access for symbols we can't control, and in fact x86 still uses pc-relative conditional branches within a function so it can't pretend to support a single

...r 32-bit. And the TargetLoweringObjectFile already has CodeModel inside. So the code will look like : const MCSection * TargetLoweringObjectFile::getSectionForConstant(SectionKind Kind) const { if (getCodeModel() == CodeModel::LargeJIT) return TextSection; if (Kind.isReadOnly() && ReadOnlySection != 0) return ReadOnlySection; return DataSection; } - Elena -----Original Message----- From: Tim Northover [mailto:t.p.northover at gmail.com] Sent: Tuesday, June 25, 2013 23:31 To: Demikhovsky, Elena Cc: llvmdev at cs.uiuc.edu Subject: Re: [LLVMdev] Contants generation - proposal H...

Hi all, I analyzed more and ready (1) to describe the problem and (2) I have a proposal. (1) Problem description: In X86_64 target the Code Model is "Large". It means that address is 64-bit and IP-relative memory operand can't be used in this case. (Because in IP-relative memory operand the displacement is 32-bit). In order to load constant, we use 2 instructions. movabsq

...> return ConstDataSection; > > - if (Kind.isMergeableConst4()) > - return FourByteConstantSection; > - if (Kind.isMergeableConst8()) > - return EightByteConstantSection; > - if (Kind.isMergeableConst16()) > - return SixteenByteConstantSection; > return ReadOnlySection; // .const > } > > >> >> -Nick >> >> >> _______________________________________________ >> LLVM Developers mailing list >> LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu >> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev >&g...

...n advise further? --- With best regards, Konstantin On Wed, Mar 14, 2012 at 9:29 PM, Anton Korobeynikov <anton at korobeynikov.info> wrote: > Hello > >> I really need in my backend value for this section, distinct from >> default. Where can I set it? > It was renamed to ReadOnlySection. You might want to check the logic > inside CodeGen/TargetLoweringObjectFileImp.cpp (in particular - > TargetLoweringObjectFile::SelectionSectionForGlobal) to see how it's > used. > > -- > With best regards, Anton Korobeynikov > Faculty of Mathematics and Mechanics, Sain...

On Aug 25, 2014, at 8:26 AM, Rafael Espíndola <rafael.espindola at gmail.com> wrote: > On 21 August 2014 19:32, Akira Hatanaka <ahatanak at gmail.com> wrote: >> Is there a way to distinguish between GlobalValues that are user-defined and >> those that are compiler-defined? I am looking for a function that I can use >> to tell if a GlobalValue is user-defined ,