2014-05-23 Yvan Roux <yvan.roux@linaro.org>

       Backport from trunk r209615.
       2014-04-22  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

       * config/arm/arm.c (arm_hard_regno_mode_ok): Loosen
       restrictions on core registers for DImode values in Thumb2.

git-svn-id: svn://gcc.gnu.org/svn/gcc/branches/linaro/gcc-4_9-branch@211508 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog.linaro b/gcc/ChangeLog.linaro
index e1bfe1e..28940aa 100644 (file)
--- a/gcc/ChangeLog.linaro
+++ b/gcc/ChangeLog.linaro
@@ -1,5 +1,13 @@
 2014-05-23  Yvan Roux  <yvan.roux@linaro.org>
 
+       Backport from trunk r209615.
+       2014-04-22  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+       * config/arm/arm.c (arm_hard_regno_mode_ok): Loosen
+       restrictions on core registers for DImode values in Thumb2.
+
+2014-05-23  Yvan Roux  <yvan.roux@linaro.org>
+
        Backport from trunk r209613, r209614.
        2014-04-22  Ian Bolton  <ian.bolton@arm.com>
 

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index dbc9681..fd5e225 100644 (file)
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -22646,12 +22646,19 @@ arm_hard_regno_mode_ok (unsigned int regno, enum machine_mode mode)
     }
 
   /* We allow almost any value to be stored in the general registers.
-     Restrict doubleword quantities to even register pairs so that we can
-     use ldrd.  Do not allow very large Neon structure opaque modes in
-     general registers; they would use too many.  */
+     Restrict doubleword quantities to even register pairs in ARM state
+     so that we can use ldrd.  Do not allow very large Neon structure
+     opaque modes in general registers; they would use too many.  */
   if (regno <= LAST_ARM_REGNUM)
-    return !(TARGET_LDRD && GET_MODE_SIZE (mode) > 4 && (regno & 1) != 0)
-      && ARM_NUM_REGS (mode) <= 4;
+    {
+      if (ARM_NUM_REGS (mode) > 4)
+         return FALSE;
+
+      if (TARGET_THUMB2)
+       return TRUE;
+
+      return !(TARGET_LDRD && GET_MODE_SIZE (mode) > 4 && (regno & 1) != 0);
+    }
 
   if (regno == FRAME_POINTER_REGNUM
       || regno == ARG_POINTER_REGNUM)