[ARC] Update mode_dependent_address_p hook.

Update arc_mode_dependent_address_p to avoid emitting subreg(mem (reg
..)) when expanding by relaxing the conditions.

gcc/
2017-04-14  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.c (arc_mode_dependent_address_p): Relax
	conditions to take advantage of various optimizations.

From-SVN: r246925

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 788f02942cc444a6fe75d84963d442b387b2a064..27cfef5a72e758a17a5376db9f69a9d0646a8df8 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2017-04-14  Claudiu Zissulescu  <claziss@synopsys.com>
+
+       * config/arc/arc.c (arc_mode_dependent_address_p): Relax
+       conditions to take advantage of various optimizations.
+
 2017-04-13  Jeff Law  <law@redhat.com>
 
        * config/mips.mips.md (zero_extendsidi2): Do not allow SP to appear

diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
index 0563a74b72471764890e012cfa5692b19fee1fca..b28c590ed266c8c9e3b662ccefd3a8fb682c708b 100644 (file)
--- a/gcc/config/arc/arc.c
+++ b/gcc/config/arc/arc.c
@@ -5509,13 +5509,9 @@ arc_mode_dependent_address_p (const_rtx addr, addr_space_t)
 {
   /* SYMBOL_REF is not mode dependent: it is either a small data reference,
      which is valid for loads and stores, or a limm offset, which is valid for
-     loads.  */
-  /* Scaled indices are scaled by the access mode; likewise for scaled
-     offsets, which are needed for maximum offset stores.  */
+     loads.  Scaled indices are scaled by the access mode.  */
   if (GET_CODE (addr) == PLUS
-      && (GET_CODE (XEXP ((addr), 0)) == MULT
-         || (CONST_INT_P (XEXP ((addr), 1))
-             && !SMALL_INT (INTVAL (XEXP ((addr), 1))))))
+      && GET_CODE (XEXP ((addr), 0)) == MULT)
     return true;
   return false;
 }