Verify class is ok when allocating reload reg in push_reload

From-SVN: r30702

gcc/ChangeLog

 1999-11-29  Bernd Schmidt  <bernds@cygnus.co.uk>
 
+	* reload.c (push_reload): When looking for a register to put into
+	reg_rtx, make sure all hard regs in a multi-reg register are in the
+	right class and nonfixed.
+
 	* haifa-sched.c (reg_last_uses, reg_last_sets, reg_last_clobbers,
 	pending_read_insns, pending_write_insns, pending_read_mems,
 	pending_write_mems, pending_list_length, last_pending_memory_flush,

gcc/reload.c

@@ -1460,14 +1460,23 @@ push_reload (in, out, inloc, outloc, class,
 	    && GET_MODE_SIZE (inmode) <= GET_MODE_SIZE (GET_MODE (XEXP (note, 0)))
 	    && HARD_REGNO_MODE_OK (regno, inmode)
 	    && GET_MODE_SIZE (outmode) <= GET_MODE_SIZE (GET_MODE (XEXP (note, 0)))
-	    && HARD_REGNO_MODE_OK (regno, outmode)
-	    && TEST_HARD_REG_BIT (reg_class_contents[(int) class], regno)
-	    && !fixed_regs[regno])
+	    && HARD_REGNO_MODE_OK (regno, outmode))
+	  {
+	    int offs;
+	    int nregs = HARD_REGNO_NREGS (regno, inmode);
+	    for (offs = 0; offs < nregs; offs++)
+	      if (fixed_regs[regno + offs]
+		  || ! TEST_HARD_REG_BIT (reg_class_contents[(int) class],
+					  regno + offs))
+		break;
+
+	    if (offs == nregs)
 	      {
 		rld[i].reg_rtx = gen_rtx_REG (inmode, regno);
 		break;
 	      }
 	  }
+    }
 
   if (out)
     output_reloadnum = i;