Support crc32 as a i386 target optimization node

	* config/i386/i386.c (ix86_valid_target_attribute_inner_p):
	Handle crc32.
	* gcc.target/i386/crc32-5.c: New test.

From-SVN: r240393

gcc/ChangeLog

 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>
+
 	PR target/71652
 	* config/i386/i386.c (ix86_option_override_internal): Change
 	signature and return false when there's an error related to

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 ("crc32",	OPT_mcrc32),
     IX86_ATTR_ISA ("sse",	OPT_msse),
     IX86_ATTR_ISA ("sse2",	OPT_msse2),
     IX86_ATTR_ISA ("sse3",	OPT_msse3),

gcc/testsuite/ChangeLog

 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.target/i386/pr71652.c: New test.
 	* gcc.target/i386/pr71652-2.c: New test.
 	* gcc.target/i386/pr71652-3.c: New test.

gcc/testsuite/gcc.target/i386/crc32-5.c

+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+/* { dg-final { scan-assembler "crc32b\[^\\n\]*eax" } } */
+/* { dg-final { scan-assembler "crc32w\[^\\n\]*eax" } } */
+/* { dg-final { scan-assembler "crc32l\[^\\n\]*eax" } } */
+
+#pragma GCC target ("crc32")
+
+unsigned int
+crc32b (unsigned int x, unsigned char y)
+{
+  return __builtin_ia32_crc32qi (x, y);
+}
+
+unsigned int
+crc32w (unsigned int x, unsigned short y)
+{
+  return __builtin_ia32_crc32hi (x, y);
+}
+
+unsigned int
+crc32d (unsigned int x, unsigned int y)
+{
+  return __builtin_ia32_crc32si (x, y);
+}