local-alloc.c (block_alloc): Stop looping over the input operands once we find…

local-alloc.c (block_alloc): Stop looping over the input operands once we find an input/output register pair...

	* local-alloc.c (block_alloc): Stop looping over the input
	operands once we find an input/output register pair which can
	be combined into a single qty.

From-SVN: r8990

gcc/local-alloc.c

@@ -1294,6 +1294,8 @@ block_alloc (b)
 			win = combine_regs (r1, r0, may_save_copy,
 					    insn_number, insn, 0);
 		    }
+		  if (win)
+		    break;
 		}
 	    }