https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101561
Bug ID: 101561 Summary: -msse4 -mno-crc32 doesn't disable CRC32 intrinsics Product: gcc Version: 11.1.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: hjl.tools at gmail dot com Target Milestone: --- [hjl@gnu-cfl-2 tmp]$ cat x.c #include <immintrin.h> unsigned int test_mm_crc32_u8(unsigned int CRC, unsigned char V) { return _mm_crc32_u8(CRC, V); } [hjl@gnu-cfl-2 tmp]$ gcc -S -O2 -msse4 -mno-crc32 x.c [hjl@gnu-cfl-2 tmp]$