PRE_INC with invalid hard reg

	PR target/68973
	* reloads.c (find_reloads_address_1): For pre/post-inc/dec
	with an invalid hard reg, reload just the reg not the entire
	pre/post-inc/dec address expression.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@233406 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0fce0c3..1561dba 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2016-02-14  Alan Modra  <amodra@gmail.com>
+
+       PR target/68973
+       * reloads.c (find_reloads_address_1): For pre/post-inc/dec
+       with an invalid hard reg, reload just the reg not the entire
+       pre/post-inc/dec address expression.
+
 2016-02-13  Oleg Endo  <olegendo@gcc.gnu.org>
 
        PR target/67260

diff --git a/gcc/reload.c b/gcc/reload.c
index 6196e63..06426d9 100644 (file)
--- a/gcc/reload.c
+++ b/gcc/reload.c
@@ -5834,14 +5834,16 @@ find_reloads_address_1 (machine_mode mode, addr_space_t as,
                           ? XEXP (x, 0)
                           : reg_equiv_mem (regno));
              enum insn_code icode = optab_handler (add_optab, GET_MODE (x));
-             if (insn && NONJUMP_INSN_P (insn) && equiv
-                 && memory_operand (equiv, GET_MODE (equiv))
+             if (insn && NONJUMP_INSN_P (insn)
 #if HAVE_cc0
                  && ! sets_cc0_p (PATTERN (insn))
 #endif
-                 && ! (icode != CODE_FOR_nothing
-                       && insn_operand_matches (icode, 0, equiv)
-                       && insn_operand_matches (icode, 1, equiv))
+                 && (regno < FIRST_PSEUDO_REGISTER
+                     || (equiv
+                         && memory_operand (equiv, GET_MODE (equiv))
+                         && ! (icode != CODE_FOR_nothing
+                               && insn_operand_matches (icode, 0, equiv)
+                               && insn_operand_matches (icode, 1, equiv))))
                  /* Using RELOAD_OTHER means we emit this and the reload we
                     made earlier in the wrong order.  */
                  && !reloaded_inner_of_autoinc)