(choose_reload_regs): Handle SUBREG in reload_earlyclobber

when matching output reloads for setting reload_when_needed.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@3670 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/reload1.c b/gcc/reload1.c
index cb3db79..15edd0b 100644 (file)
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -4187,8 +4187,14 @@ choose_reload_regs (insn, avoid_return_reg)
          {
            /* But earlyclobber operands must stay as RELOAD_OTHER.  */
            for (i = 0; i < n_earlyclobbers; i++)
-             if (rtx_equal_p (reload_out[j], reload_earlyclobbers[i]))
-               break;
+             {
+               if (GET_CODE (reload_earlyclobbers[i]) == SUBREG
+                   && reg_overlap_mentioned_for_reload_p (reload_out[j],
+                                   SUBREG_REG (reload_earlyclobbers[i])))
+                 break;
+               if (rtx_equal_p (reload_out[j], reload_earlyclobbers[i]))
+                 break;
+             }
            if (i == n_earlyclobbers)
              reload_when_needed[j] = RELOAD_FOR_OUTPUT;
          }