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Diffstat (limited to 'gcc-4.4.0/gcc/LANGUAGES')
-rw-r--r-- | gcc-4.4.0/gcc/LANGUAGES | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/gcc-4.4.0/gcc/LANGUAGES b/gcc-4.4.0/gcc/LANGUAGES deleted file mode 100644 index 5f20d9c24..000000000 --- a/gcc-4.4.0/gcc/LANGUAGES +++ /dev/null @@ -1,57 +0,0 @@ -Right now there is no documentation for the GCC tree -> rtl interfaces -(or more generally the interfaces for adding new languages). - -Such documentation would be of great benefit to the project. Until such -time as we can formally start documenting the interface this file will -serve as a repository for information on these interface and any incompatable -changes we've made. - -2004-09-09: - In an effort to decrease execution time, single char tree code - classes were changed to enumerated values. - - Old way: - - DEFTREECODE (CLASS_METHOD_DECL, "class_method_decl", 'd', 0) - - New way: - - DEFTREECODE (CLASS_METHOD_DECL, "class_method_decl", tcc_declaration, 0) - -2001-02-26: - A DECL_INITIAL of NULL_TREE or error_mark_node in a VAR_DECL is no longer - taken to signify a tentative definition which should not be emitted until - end-of-file. Frontends which want that behavior should set - DECL_DEFER_OUTPUT before calling rest_of_decl_compilation. - -Feb 1, 1998: - - GCC used to store structure sizes & offsets to elements as bitsize - quantities. This causes problems because a structure can only be - (target memsize / 8) bytes long (this may effect arrays too). This - is particularly problematical on machines with small address spaces. - - So: - - All trees that represent sizes in bits should have a TREE_TYPE of - bitsizetype (rather than sizetype). - - Accordingly, when such values are computed / initialized, care has to - be takes to use / compute the proper type. - - When a size in bits is converted into a size in bytes, which is expressed - in trees, care should be taken to change the tree's type again to sizetype. - -?? 1997: - - In an effort to decrease cache thrashing and useless loads we've changed the - third argument to the DEFTREECODE macro to be a single char. This will - affect languages that defined their own tree codes (usually in a .def file). - - Old way: - - DEFTREECODE (CLASS_METHOD_DECL, "class_method_decl", "d", 0) - - New way: - - DEFTREECODE (CLASS_METHOD_DECL, "class_method_decl", 'd', 0) |