2011-09-01 Romain Berrendonner <berrendo@adacore.com>

[pf3gnuchains/gcc-fork.git] / gcc / regcprop.c

diff --git a/gcc/regcprop.c b/gcc/regcprop.c
index bf34115..aca005d 100644 (file)
--- a/gcc/regcprop.c
+++ b/gcc/regcprop.c
@@ -418,10 +418,9 @@ maybe_mode_change (enum machine_mode orig_mode, enum machine_mode copy_mode,
 
       offset = ((WORDS_BIG_ENDIAN ? wordoffset : 0)
                + (BYTES_BIG_ENDIAN ? byteoffset : 0));
-      return gen_rtx_raw_REG (new_mode,
-                             regno + subreg_regno_offset (regno, orig_mode,
-                                                          offset,
-                                                          new_mode));
+      regno += subreg_regno_offset (regno, orig_mode, offset, new_mode);
+      if (HARD_REGNO_MODE_OK (regno, new_mode))
+       return gen_rtx_raw_REG (new_mode, regno);
     }
   return NULL_RTX;
 }
@@ -1188,7 +1187,7 @@ struct rtl_opt_pass pass_cprop_hardreg =
   0,                                    /* properties_provided */
   0,                                    /* properties_destroyed */
   0,                                    /* todo_flags_start */
-  TODO_dump_func | TODO_df_finish
+  TODO_df_finish
   | TODO_verify_rtl_sharing            /* todo_flags_finish */
  }
 };