Document change in 3rd argument to DEFTREECODE.

From-SVN: r17667

Document change in 3rd argument to DEFTREECODE.
From-SVN: r17667
c3356143 · Jeff Law · 05d7b077 · c3356143
Commit c3356143 authored Feb 05, 1998 by Jeff Law
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gcc/LANGUAGES
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--- a/gcc/LANGUAGES
+++ b/gcc/LANGUAGES
@@ -29,4 +29,16 @@ Feb 1, 1998:
    scheme.  Other languages will need to be updated accordingly.
    Contact amylaar@cygnus.com for additional information.

+?? 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
+  effect 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)