(expand_inline_function): Ensure a REG used as

COPY has REG_USERVAR_P set if LOC does.

From-SVN: r2796

diff --git a/gcc/integrate.c b/gcc/integrate.c
index 952a647..14ce727 100644 (file)
--- a/gcc/integrate.c
+++ b/gcc/integrate.c
@@ -1372,10 +1372,17 @@ expand_inline_function (fndecl, parms, target, ignore, type, structure_value_add
        {
          /* This is the good case where the parameter is in a register.
             If it is read-only and our argument is a constant, set up the
-            constant equivalence.  */
-         if (GET_CODE (copy) != REG && GET_CODE (copy) != SUBREG)
+            constant equivalence.
+
+            If LOC is REG_USERVAR_P, the usual case, COPY must also have
+            that flag set if it is a register.  */
+
+         if ((GET_CODE (copy) != REG && GET_CODE (copy) != SUBREG)
+             || (GET_CODE (copy) == REG && REG_USERVAR_P (loc)
+                 && ! REG_USERVAR_P (copy)))
            {
              temp = copy_to_mode_reg (GET_MODE (loc), copy);
+             REG_USERVAR_P (temp) = REG_USERVAR_P (loc);
              if (CONSTANT_P (copy) || FIXED_BASE_PLUS_P (copy))
                {
                  map->const_equiv_map[REGNO (temp)] = copy;