Extend list of codes accepted by address_operand

[Richard Sandiford]

While testing the patch that I'm about to post, I found that the list
of address_operand codes in gensupport.c was incomplete.  This patch
fills in some "obvious" missing entries.

It isn't exactly clear which codes are allowed at the top level of
an address.  decompose_address is known to be general enough for all LRA
targets, but it also technically accepts any unary operator as the outer
code, whereas I think only SIGN_EXTEND and ZERO_EXTEND are used at the
top level.  The routine accepts ZERO_EXTRACT and SIGN_EXTRACT, but I
think in practice they're only used for index values and not full addresses.

Tested on x86_64-linux-gnu.  OK to install?

Thanks,
Richard


gcc/
	* gensupport.c (std_preds): Add missing codes to address_operand entry.

Index: gcc/gensupport.c
===================================================================
--- gcc/gensupport.c	2015-04-27 10:38:48.000000000 +0100
+++ gcc/gensupport.c	2015-04-27 10:40:59.044635383 +0100
@@ -2800,7 +2800,8 @@ struct std_pred_table
 
 static const struct std_pred_table std_preds[] = {
   {"general_operand", false, true, {SUBREG, REG, MEM}},
-  {"address_operand", true, true, {SUBREG, REG, MEM, PLUS, MINUS, MULT}},
+  {"address_operand", true, true, {SUBREG, REG, MEM, PLUS, MINUS, MULT,
+				   ZERO_EXTEND, SIGN_EXTEND, AND}},
   {"register_operand", false, false, {SUBREG, REG}},
   {"pmode_register_operand", true, false, {SUBREG, REG}},
   {"scratch_operand", false, false, {SCRATCH, REG}},