mips.c (mips_class_max_nregs): Check that the mode is OK for ST_REGS and FP_REGS…

mips.c (mips_class_max_nregs): Check that the mode is OK for ST_REGS and FP_REGS before taking those classes...

gcc/
	* config/mips/mips.c (mips_class_max_nregs): Check that the mode is
	OK for ST_REGS and FP_REGS before taking those classes into account.

From-SVN: r177931

gcc/ChangeLog

 2011-08-20  Richard Sandiford  <rdsandiford@googlemail.com>
 
+	* config/mips/mips.c (mips_class_max_nregs): Check that the mode is
+	OK for ST_REGS and FP_REGS before taking those classes into account.
+
+2011-08-20  Richard Sandiford  <rdsandiford@googlemail.com>
+
 	* config/mips/mips.c (mips_reorg_process_insns): Check for jumps
 	before checking for annulled branches.
 

gcc/config/mips/mips.c

@@ -10630,12 +10630,14 @@ mips_class_max_nregs (enum reg_class rclass, enum machine_mode mode)
   COPY_HARD_REG_SET (left, reg_class_contents[(int) rclass]);
   if (hard_reg_set_intersect_p (left, reg_class_contents[(int) ST_REGS]))
     {
-      size = MIN (size, 4);
+      if (HARD_REGNO_MODE_OK (ST_REG_FIRST, mode))
+	size = MIN (size, 4);
       AND_COMPL_HARD_REG_SET (left, reg_class_contents[(int) ST_REGS]);
     }
   if (hard_reg_set_intersect_p (left, reg_class_contents[(int) FP_REGS]))
     {
-      size = MIN (size, UNITS_PER_FPREG);
+      if (HARD_REGNO_MODE_OK (FP_REG_FIRST, mode))
+	size = MIN (size, UNITS_PER_FPREG);
       AND_COMPL_HARD_REG_SET (left, reg_class_contents[(int) FP_REGS]);
     }
   if (!hard_reg_set_empty_p (left))