mips.c (mips_default_arch): Honor MIPS_ISA_DEFAULT.

gcc/
	* config/mips/mips.c (mips_default_arch): Honor MIPS_ISA_DEFAULT.

From-SVN: r174045

gcc/ChangeLog

+2011-05-22  Richard Sandiford  <rdsandiford@googlemail.com>
+
+	* config/mips/mips.c (mips_default_arch): Honor MIPS_ISA_DEFAULT.
+
 2011-05-22  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* config/sparc/sparc.c (sparc_delegitimize_address): Handle

gcc/config/mips/mips.c

@@ -15239,12 +15239,14 @@ mips_cpu_info_from_opt (int opt)
 static const struct mips_cpu_info *
 mips_default_arch (void)
 {
-#ifdef MIPS_CPU_STRING_DEFAULT
+#if defined (MIPS_CPU_STRING_DEFAULT)
   unsigned int i;
   for (i = 0; i < ARRAY_SIZE (mips_cpu_info_table); i++)
     if (strcmp (mips_cpu_info_table[i].name, MIPS_CPU_STRING_DEFAULT) == 0)
       return mips_cpu_info_table + i;
   gcc_unreachable ();
+#elif defined (MIPS_ISA_DEFAULT)
+  return mips_cpu_info_from_isa (MIPS_ISA_DEFAULT);
 #else
   /* 'from-abi' makes a good default: you get whatever the ABI
      requires.  */