re PR target/49939 ([avr] Skip 2-word instructions if applicable)

	PR target/49939
	* config/avr/avr.h (ASM_SPEC): Add -mno-skip-bug if we know that
	the device does not have the skip-bug.

From-SVN: r184656

gcc/ChangeLog

+2012-02-29  Georg-Johann Lay  <avr@gjlay.de>
+
+	PR target/49939
+	* config/avr/avr.h (ASM_SPEC): Add -mno-skip-bug if we know that
+	the device does not have the skip-bug.
+
 2012-02-29  Oleg Endo  <olegendo@gcc.gnu.org>
 
 	* doc/invoke.texi (-msoft-atomic): Add more detailed description.

gcc/config/avr/avr.h

@@ -595,7 +595,9 @@ extern const char *avr_device_to_devicelib (int argc, const char **argv);
    pass to `cc1plus'.  */
 
 #define ASM_SPEC "%{mmcu=avr25:-mmcu=avr2;mmcu=avr35:-mmcu=avr3;mmcu=avr31:-mmcu=avr3;mmcu=avr51:-mmcu=avr5;\
-mmcu=*:-mmcu=%*}"
+mmcu=*:-mmcu=%*} \
+%{mmcu=*:%{!mmcu=avr2:%{!mmcu=at90s8515:%{!mmcu=avr31:%{!mmcu=atmega103:\
+-mno-skip-bug}}}}}"
 
 #define LINK_SPEC "\
 %{mrelax:--relax\