gas/riscv: Remove unneeded structure

We build a hash table of all register classes and numbers.  The hash
key is the register name and the hash value is the class and number
encoded into a single value, which is of type 'void *'.

When we pull the values out of the hash we cast them to be a pointer
to a structure, however, we never access the fields of that structure,
we just decode the register class and number from the pointer value
itself.

This commit removes the structure and treats the encoded class and
number as a 'void *' during hash lookup.

gas/ChangeLog:

	* config/tc-riscv.c (struct regname): Delete.
	(hash_reg_names): Handle value as 'void *'.

Change-Id: Ie7d8f46ca3798f56f4af94395279de684f87f9cc

2 files changed, 6 insertions, 7 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 0999152..f3b8d33 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,8 @@
+2019-11-22  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* config/tc-riscv.c (struct regname): Delete.
+	(hash_reg_names): Handle value as 'void *'.
+
 2019-11-25  Andrew Pinski  <apinski@marvell.com>
 
 	* config/tc-aarch64.c (md_begin): Use correct
diff --git a/gas/config/tc-riscv.c b/gas/config/tc-riscv.c
index e505051..5d95ee8 100644
--- a/gas/config/tc-riscv.c
+++ b/gas/config/tc-riscv.c
@@ -446,12 +446,6 @@ opcode_name_lookup (char **s)
   return o;
 }
 
-struct regname
-{
-  const char *name;
-  unsigned int num;
-};
-
 enum reg_class
 {
   RCLASS_GPR,
@@ -489,7 +483,7 @@ hash_reg_names (enum reg_class class, const char * const names[], unsigned n)
 static unsigned int
 reg_lookup_internal (const char *s, enum reg_class class)
 {
-  struct regname *r = (struct regname *) hash_find (reg_names_hash, s);
+  void *r = hash_find (reg_names_hash, s);
 
   if (r == NULL || DECODE_REG_CLASS (r) != class)
     return -1;