re PR target/65210 ([avr] ICE: when using attributs 'address' and 'io_low')

gcc/ChangeLog

	PR target/65210
	* config/avr/avr.c (avr_eval_addr_attrib): Look for io_low
	attribute as well.

gcc/testsuite/ChangeLog

	PR target/65210
	* gcc.target/avr/pr65210.c: New test.

From-SVN: r227496

gcc/ChangeLog

+2015-09-02  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
+
+	PR target/65210
+	* config/avr/avr.c (avr_eval_addr_attrib): Look for io_low
+	attribute as well.
+
 2015-09-04  Tom de Vries  <tom@codesourcery.com>
 
 	* doc/invoke.texi (@item -ftrapv, @item -fwrapv): Document interaction.

gcc/config/avr/avr.c

@@ -9069,6 +9069,8 @@ avr_eval_addr_attrib (rtx x)
       if (SYMBOL_REF_FLAGS (x) & SYMBOL_FLAG_IO)
 	{
 	  attr = lookup_attribute ("io", DECL_ATTRIBUTES (decl));
+         if (!attr || !TREE_VALUE (attr))
+           attr = lookup_attribute ("io_low", DECL_ATTRIBUTES (decl));
 	  gcc_assert (attr);
 	}
       if (!attr || !TREE_VALUE (attr))

gcc/testsuite/ChangeLog

+2015-09-02  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
+
+	PR target/65210
+	* gcc.target/avr/pr65210.c: New test.
+
 2015-09-04  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR testsuite/67450

gcc/testsuite/gcc.target/avr/pr65210.c

+/* { dg-do compile } */
+
+/* This testcase exposes PR65210. Usage of the io_low attribute
+   causes assertion failure because code only looks for the io
+   attribute if SYMBOL_FLAG_IO is set. */
+
+volatile char q __attribute__((io_low,address(0x81)));