mirror of
https://github.com/xomboverlord/ldc.git
synced 2026-01-16 21:03:14 +01:00
787c147986
This commit fundamentally changes the way symbol emission in LDC works: Previously, whenever a declaration was used in some way, the compiler would check whether it actually needs to be defined in the currently processed module, based only on the symbol itself. This lack of contextual information proved to be a major problem in correctly handling emission of templates (see e.g. #454). Now, the DtoResolve…() family of functions and similar only ever declare the symbols, and definition is handled by doing a single pass over Module::members for the root module. This is the same strategy that DMD uses as well, which should also reduce the maintainance burden down the road (which is important as during the last few releases, there was pretty much always a symbol emission related problem slowing us down). Our old approach might have been a bit better tuned w.r.t. avoiding emission of unneeded template instances, but 2.064 will bring improvements here (DMD: FuncDeclaration::toObjFile). Barring such issues, the change shoud also marginally improve compile times because of declarations no longer being emitted when they are not needed. In the future, we should also consider refactoring the code so that it no longer directly accesses Dsymbol::ir but uses wrapper functions that ensure that the appropriate DtoResolve…() function has been called. GitHub: Fixes #454.
The D Programming Language Compiler Front End Source Copyright (c) 1999-2013, by Digital Mars http://www.digitalmars.com/ All Rights Reserved This is the source code to the front end Digital Mars D compiler. It covers the lexical analysis, parsing, and semantic analysis of the D Programming Language defined in the documents at http://dlang.org/ These sources are free, they are redistributable and modifiable under the terms of the GNU General Public License as published by the Free Software Foundation; either version 1, or (at your option) any later version (attached as gpl.txt), or the Artistic License (attached as artistic.txt). The optimizer and code generator sources are covered under a separate license, backendlicense.txt. It does not apply to anything else distributed by Digital Mars, including D compiler executables. -Walter Bright