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view dmd/macro.h @ 1275:bedf0bfb8fdb
Implement first D-specific optimization pass: -simplify-drtcalls.
It uses the machinery of the standard -simplify-libcalls pass, but optimizes
calls to the D runtime instead of calls to C libraries.
At the moment, these optimizations are implemented by this pass:
- Avoid the runtime call for `arr.length = newlen` if it can determine that
the new length isn't longer than the old one.
- Ditto for `cast(T[]) arr` if it will clearly always succeed.
(e.g. if the length of the original array is zero, or if the old element
size is a multiple of the new element size)
author | Frits van Bommel <fvbommel wxs.nl> |
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date | Tue, 28 Apr 2009 21:58:06 +0200 |
parents | c53b6e3fe49a |
children |
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// Compiler implementation of the D programming language // Copyright (c) 1999-2006 by Digital Mars // All Rights Reserved // written by Walter Bright // http://www.digitalmars.com // License for redistribution is by either the Artistic License // in artistic.txt, or the GNU General Public License in gnu.txt. // See the included readme.txt for details. #ifndef DMD_MACRO_H #define DMD_MACRO_H 1 #include <stdio.h> #include <string.h> #include <time.h> #include <ctype.h> #include "root.h" class Macro { Macro *next; // next in list unsigned char *name; // macro name size_t namelen; // length of macro name unsigned char *text; // macro replacement text size_t textlen; // length of replacement text int inuse; // macro is in use (don't expand) Macro(unsigned char *name, size_t namelen, unsigned char *text, size_t textlen); Macro *search(unsigned char *name, size_t namelen); public: static Macro *define(Macro **ptable, unsigned char *name, size_t namelen, unsigned char *text, size_t textlen); void expand(OutBuffer *buf, unsigned start, unsigned *pend, unsigned char *arg, unsigned arglen); }; #endif