* rtl.h (traverse_md_constants): Declare.

	(struct md_constant): Define.
	* Makefile.in (HOST_RTL): Add hashtab.o .
	(OBJS): Add hashtab.o .
	(hashtab.o): New rule.
	(rtl.o): Depends on HASHTAB_H.
	* rtl.c (hashtab.h): #include.
	(md_constants): New static variable.
	(def_hash, def_name_eq_p, read_constants): New static functions.
	(traverse_md_constants): New function.
	(read_name): Do constant expansion.
	(read_rtx): Recognize define_constants.
	* gencodes.c (print_md_constant): New function.
	(main): Emit #defines for all constant definitions encountered.
	* md.texi (Constant Definitions): New node.
	* gensupport.c (xcalloc): New function.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@37635 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 15 insertions, 0 deletions

diff --git a/gcc/gensupport.c b/gcc/gensupport.c
index ce4869bccbe..cde2a220b4e 100644
--- a/gcc/gensupport.c
+++ b/gcc/gensupport.c
@@ -863,6 +863,21 @@ xstrdup (input)
 }
 
 PTR
+xcalloc (nelem, elsize)
+  size_t nelem, elsize;
+{
+  PTR newmem;
+
+  if (nelem == 0 || elsize == 0)
+    nelem = elsize = 1;
+
+  newmem = calloc (nelem, elsize);
+  if (!newmem)
+    fatal ("virtual memory exhausted");
+  return (newmem);
+}
+
+PTR
 xrealloc (old, size)
   PTR old;
   size_t size;