llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-07-21 02:29:22 +00:00

History

Duncan Sands 667d4b8de6 Introduce new linkage types linkonce_odr, weak_odr, common_odr and extern_weak_odr. These are the same as the non-odr versions, except that they indicate that the global will only be overridden by an equivalent global. In C, a function with weak linkage can be overridden by a function which behaves completely differently. This means that IP passes have to skip weak functions, since any deductions made from the function definition might be wrong, since the definition could be replaced by something completely different at link time. This is not allowed in C++, thanks to the ODR (One-Definition-Rule): if a function is replaced by another at link-time, then the new function must be the same as the original function. If a language knows that a function or other global can only be overridden by an equivalent global, it can give it the weak_odr linkage type, and the optimizers will understand that it is alright to make deductions based on the function body. The code generators on the other hand map weak and weak_odr linkage to the same thing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66339 91177308-0d34-0410-b5e6-96231b3b80d8		2009-03-07 15:45:40 +00:00
..
llvm.vim	Introduce new linkage types linkonce_odr, weak_odr, common_odr	2009-03-07 15:45:40 +00:00
README	Fix a missing word.	2009-01-21 21:54:44 +00:00
tablegen.vim	vimrc	2009-01-02 16:26:14 +00:00
vimrc	Enable syntax highlighting of LLVM and tablegen files by default,	2009-01-21 21:47:51 +00:00

README

-*- llvm/utils/vim/README -*-

These are syntax highlighting files for the VIM editor. Included are:

* llvm.vim

  Syntax highlighting mode for LLVM assembly files. To use, copy `llvm.vim' to
  ~/.vim/syntax and add this code to your ~/.vimrc :

  augroup filetype
    au! BufRead,BufNewFile *.ll     set filetype=llvm
  augroup END

* tablegen.vim

  Syntax highlighting mode for TableGen description files. To use, copy
  `tablegen.vim' to ~/.vim/syntax and add this code to your ~/.vimrc :

  augroup filetype
    au! BufRead,BufNewFile *.td     set filetype=tablegen
  augroup END


If you prefer, instead of making copies you can make symlinks from
~/.vim/syntax/... to the syntax files in your LLVM source tree. Apparently
this did not work with older versions of vim however, so if this doesn't
work you may need to make actual copies of the files.

Another option, if you do not already have a ~/.vim/syntax directory, is
to symlink ~/.vim/syntax itself to llvm/utils/vim .

Note: If you notice missing or incorrect syntax highlighting, please contact
<llvmbugs [at] cs.uiuc.edu>; if you wish to provide a patch to improve the
functionality, it will be most appreciated. Thank you.

If you find yourself working with LLVM Makefiles often, but you don't get syntax
highlighting (because the files have names such as Makefile.rules or
TEST.nightly.Makefile), add the following to your ~/.vimrc:

  " LLVM Makefile highlighting mode
  augroup filetype
    au! BufRead,BufNewFile *Makefile*     set filetype=make
  augroup END