Support movbe as a i386 target optimization node

	* gcc.target/i386/movbe-4.c: New test.
	* config/i386/i386.c (ix86_valid_target_attribute_inner_p):
	Handle movbe.

From-SVN: r240394

gcc/ChangeLog

 2016-09-23  Martin Liska  <mliska@suse.cz>
 
 	* config/i386/i386.c (ix86_valid_target_attribute_inner_p):
+	Handle movbe.
+
+2016-09-23  Martin Liska  <mliska@suse.cz>
+
+	* config/i386/i386.c (ix86_valid_target_attribute_inner_p):
 	Handle crc32.
 
 2016-09-23  Martin Liska  <mliska@suse.cz>

gcc/config/i386/i386.c

@@ -6526,6 +6526,7 @@ ix86_valid_target_attribute_inner_p (tree args, char *p_strings[],
     IX86_ATTR_ISA ("mmx",	OPT_mmmx),
     IX86_ATTR_ISA ("pclmul",	OPT_mpclmul),
     IX86_ATTR_ISA ("popcnt",	OPT_mpopcnt),
+    IX86_ATTR_ISA ("movbe",	OPT_mmovbe),
     IX86_ATTR_ISA ("crc32",	OPT_mcrc32),
     IX86_ATTR_ISA ("sse",	OPT_msse),
     IX86_ATTR_ISA ("sse2",	OPT_msse2),

gcc/testsuite/ChangeLog

 2016-09-23  Martin Liska  <mliska@suse.cz>
 
+	* gcc.target/i386/movbe-4.c: New test.
+
+2016-09-23  Martin Liska  <mliska@suse.cz>
+
 	* gcc.target/i386/crc32-5.c: New test.
 
 2016-09-23  Martin Liska  <mliska@suse.cz>

gcc/testsuite/gcc.target/i386/movbe-4.c

+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+#pragma GCC target ("movbe")
+
+extern int x;
+
+void
+foo (int i)
+{
+  x = __builtin_bswap32 (i);
+}
+
+int
+bar ()
+{
+  return __builtin_bswap32 (x);
+}
+
+/* { dg-final { scan-assembler-times "movbe\[ \t\]" 2 } } */