[php-src] Issue #20806: Check for preserve_none does not support `-flto`, but compilation works when it's forced

Issue: https://github.com/php/php-src/issues/20806
Author: henderkes

### Description

The following code:

```bash
CC=clang CFLAGS="-O2 -flto" ./configure --disable-all --enable-cli
```

Resulted in this output:
```
configure:81625: checking for preserve_none calling convention
configure:81719: clang -o conftest -O2 -flto -ffp-contract=off -fvisibility=hidden -DNDEBUG  -D_GNU_SOURCE  conftest.c  >&5
/usr/bin/ld: /tmp/lto-llvm-ae16b9.o: in function `main':
ld-temp.o:(.text.unlikely.main+0x2d): undefined reference to `fun'
clang: error: linker command failed with exit code 1 (use -v to see invocation)
configure:81719: $? = 1
configure: program exited with status 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "PHP"
| #define PACKAGE_TARNAME "php"
| #define PACKAGE_VERSION "8.5.0-dev"
| #define PACKAGE_STRING "PHP 8.5.0-dev"
| #define PACKAGE_BUGREPORT "https://github.com/php/php-src/issues"
| #define PACKAGE_URL "https://www.php.net"
| #define HAVE_STDIO_H 1
| #define HAVE_STDLIB_H 1
| #define HAVE_STRING_H 1
| #define HAVE_INTTYPES_H 1
| #define HAVE_STDINT_H 1
| #define HAVE_STRINGS_H 1
| #define HAVE_SYS_STAT_H 1
| #define HAVE_SYS_TYPES_H 1
| #define HAVE_UNISTD_H 1
| #define HAVE_WCHAR_H 1
| #define STDC_HEADERS 1
| #define _ALL_SOURCE 1
| #define _DARWIN_C_SOURCE 1
| #define _GNU_SOURCE 1
| #define _HPUX_ALT_XOPEN_SOCKET_API 1
| #define _NETBSD_SOURCE 1
| #define _OPENBSD_SOURCE 1
| #define _POSIX_PTHREAD_SEMANTICS 1
| #define __STDC_WANT_IEC_60559_ATTRIBS_EXT__ 1
| #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
| #define __STDC_WANT_IEC_60559_DFP_EXT__ 1
| #define __STDC_WANT_IEC_60559_FUNCS_EXT__ 1
| #define __STDC_WANT_IEC_60559_TYPES_EXT__ 1
| #define __STDC_WANT_LIB_EXT2__ 1
| #define __STDC_WANT_MATH_SPEC_FUNCS__ 1
| #define _TANDEM_SOURCE 1
| #define __EXTENSIONS__ 1
| #define GWINSZ_IN_SYS_IOCTL 1
| #define HAVE_USERFAULTFD_WRITEFAULT 1
| #define PHP_WRITE_STDOUT 1
| #define HAVE_SOCKETPAIR 1
| #define HAVE_LIBDL 1
| #define HAVE_OPENPTY 1
| #define HAVE_DIRENT_H 1
| #define HAVE_SYS_PARAM_H 1
| #define HAVE_SYS_TYPES_H 1
| #define HAVE_SYS_TIME_H 1
| #define HAVE_NETINET_IN_H 1
| #define HAVE_ALLOCA_H 1
| #define HAVE_ARPA_INET_H 1
| #define HAVE_ARPA_NAMESER_H 1
| #define HAVE_FCNTL_H 1
| #define HAVE_GRP_H 1
| #define HAVE_LANGINFO_H 1
| #define HAVE_LINUX_SOCK_DIAG_H 1
| #define HAVE_POLL_H 1
| #define HAVE_PTY_H 1
| #define HAVE_PWD_H 1
| #define HAVE_RESOLV_H 1
| #define HAVE_STRINGS_H 1
| #define HAVE_SYSLOG_H 1
| #define HAVE_SYSEXITS_H 1
| #define HAVE_SYS_IOCTL_H 1
| #define HAVE_SYS_FILE_H 1
| #define HAVE_SYS_MMAN_H 1
| #define HAVE_SYS_MOUNT_H 1
| #define HAVE_SYS_POLL_H 1
| #define HAVE_SYS_RESOURCE_H 1
| #define HAVE_SYS_SELECT_H 1
| #define HAVE_SYS_SOCKET_H 1
| #define HAVE_SYS_STAT_H 1
| #define HAVE_SYS_STATFS_H 1
| #define HAVE_SYS_STATVFS_H 1
| #define HAVE_SYS_VFS_H 1
| #define HAVE_SYS_UIO_H 1
| #define HAVE_SYS_WAIT_H 1
| #define HAVE_UNISTD_H 1
| #define HAVE_UTIME_H 1
| #define HAVE_SYS_UTSNAME_H 1
| #define HAVE_SYS_IPC_H 1
| #define HAVE_DLFCN_H 1
| #define HAVE_TMMINTRIN_H 1
| #define HAVE_NMMINTRIN_H 1
| #define HAVE_WMMINTRIN_H 1
| #define HAVE_IMMINTRIN_H 1
| #define HAVE_FOPENCOOKIE 1
| #define COOKIE_SEEKER_USES_OFF64_T 1
| #define MAJOR_IN_SYSMACROS 1
| #define HAVE_STRUCT_TM_TM_ZONE 1
| #define HAVE_TM_ZONE 1
| #define HAVE_STRUCT_FLOCK 1
| #define HAVE_SOCKLEN_T 1
| #define SIZEOF_INT 4
| #define SIZEOF_LONG 8
| #define SIZEOF_LONG_LONG 8
| #define SIZEOF_SIZE_T 8
| #define SIZEOF_OFF_T 8
| #define PHP_HAVE_BUILTIN_CLZ 1
| #define PHP_HAVE_BUILTIN_CLZL 1
| #define PHP_HAVE_BUILTIN_CLZLL 1
| #define PHP_HAVE_BUILTIN_CPU_INIT 1
| #define PHP_HAVE_BUILTIN_CPU_SUPPORTS 1
| #define PHP_HAVE_BUILTIN_CTZL 1
| #define PHP_HAVE_BUILTIN_CTZLL 1
| #define PHP_HAVE_BUILTIN_EXPECT 1
| #define PHP_HAVE_BUILTIN_FRAME_ADDRESS 1
| #define PHP_HAVE_BUILTIN_SADDL_OVERFLOW 1
| #define PHP_HAVE_BUILTIN_SADDLL_OVERFLOW 1
| #define PHP_HAVE_BUILTIN_SMULL_OVERFLOW 1
| #define PHP_HAVE_BUILTIN_SMULLL_OVERFLOW 1
| #define PHP_HAVE_BUILTIN_SSUBL_OVERFLOW 1
| #define PHP_HAVE_BUILTIN_SSUBLL_OVERFLOW 1
| #define PHP_HAVE_BUILTIN_UNREACHABLE 1
| #define PHP_HAVE_BUILTIN_USUB_OVERFLOW 1
| #define PHP_HAVE_AVX512_SUPPORTS 1
| #define PHP_HAVE_AVX512_VBMI_SUPPORTS 1
| #define HAVE_ALIGNOF 1
| #define HAVE_STRUCT_TM_TM_GMTOFF 1
| #define HAVE_STRUCT_STAT_ST_BLKSIZE 1
| #define HAVE_STRUCT_STAT_ST_RDEV 1
| #define HAVE_STRUCT_STAT_ST_BLOCKS 1
| #define HAVE_ST_BLOCKS 1
| #define HAVE_STRUCT_SOCKADDR_STORAGE 1
| #define HAVE_FUNC_ATTRIBUTE_IFUNC 1
| #define HAVE_FUNC_ATTRIBUTE_TARGET 1
| #define HAVE_ATTRIBUTE_ALIGNED 1
| #define HAVE_ALPHASORT 1
| #define HAVE_ASCTIME_R 1
| #define HAVE_ASPRINTF 1
| #define HAVE_CHROOT 1
| #define HAVE_CTIME_R 1
| #define HAVE_FDATASYNC 1
| #define HAVE_FLOCK 1
| #define HAVE_FTOK 1
| #define HAVE_GAI_STRERROR 1
| #define HAVE_GETCWD 1
| #define HAVE_GETGRNAM_R 1
| #define HAVE_GETHOSTNAME 1
| #define HAVE_GETLOADAVG 1
| #define HAVE_GETPROTOBYNAME 1
| #define HAVE_GETPROTOBYNUMBER 1
| #define HAVE_GETPWNAM_R 1
| #define HAVE_GETPWUID_R 1
| #define HAVE_GETRUSAGE 1
| #define HAVE_GETSERVBYNAME 1
| #define HAVE_GETSERVBYPORT 1
| #define HAVE_GETTIMEOFDAY 1
| #define HAVE_GETWD 1
| #define HAVE_GLOB 1
| #define HAVE_GMTIME_R 1
| #define HAVE_LCHOWN 1
| #define HAVE_LOCALTIME_R 1
| #define HAVE_MEMFD_CREATE 1
| #define HAVE_MEMMEM 1
| #define HAVE_MEMPCPY 1
| #define HAVE_MEMRCHR 1
| #define HAVE_MKSTEMP 1
| #define HAVE_MMAP 1
| #define HAVE_NICE 1
| #define HAVE_NL_LANGINFO 1
| #define HAVE_POLL 1
| #define HAVE_PUTENV 1
| #define HAVE_REALLOCARRAY 1
| #define HAVE_SCANDIR 1
| #define HAVE_SETENV 1
| #define HAVE_SETITIMER 1
| #define HAVE_SHUTDOWN 1
| #define HAVE_SIGPROCMASK 1
| #define HAVE_STATFS 1
| #define HAVE_STATVFS 1
| #define HAVE_STRCASECMP 1
| #define HAVE_STRPTIME 1
| #define HAVE_STRTOK_R 1
| #define HAVE_SYMLINK 1
| #define HAVE_TZSET 1
| #define HAVE_UNSETENV 1
| #define HAVE_USLEEP 1
| #define HAVE_UTIME 1
| #define HAVE_VASPRINTF 1
| #define HAVE_NEWLOCALE 1
| #define HAVE_USELOCALE 1
| #define HAVE_FREELOCALE 1
| #define HAVE_DECL_STRERROR_R 1
| #define HAVE_STRERROR_R 1
| #define STRERROR_R_CHAR_P 1
| #define HAVE_PRCTL 1
| #define HAVE_GETHOSTBYNAME_R 1
| #define HAVE_FUNC_GETHOSTBYNAME_R_6 1
| #define HAVE_NANOSLEEP 1
| #define HAVE_GETADDRINFO 1
| #define HAVE_COPY_FILE_RANGE 1
| #define HAVE_STRLCAT 1
| #define HAVE_STRLCPY 1
| #define HAVE_EXPLICIT_BZERO 1
| #define HAVE_GETOPT 1
| #define HAVE_ALLOCA_H 1
| #define HAVE_ALLOCA 1
| #define HAVE_ASM_GOTO 1
| #define PHP_SIGCHILD 0
| #define DEFAULT_SHORT_OPEN_TAG "1"
| #define HAVE_IPV6 1
| #define HAVE_STRTOLL 1
| #define HAVE_ATOLL 1
| #define HAVE_TIMELIB_CONFIG_H 1
| #define HAVE_BUNDLED_PCRE 1
| #define PCRE2_CODE_UNIT_WIDTH 8
| #define HAVE_PCRE_JIT_SUPPORT 1
| #define SIZEOF_LONG 8
| #define HAVE_LEXBOR 1
| #define LEXBOR_VERSION "2.5.0"
| #define HAVE_HUGE_CODE_PAGES 1
| #define HAVE_JIT 1
| #define HAVE_MPROTECT 1
| #define HAVE_SHM_IPC 1
| #define HAVE_SHM_MMAP_ANON 1
| #define HAVE_SHM_MMAP_POSIX 1
| #define HAVE_ARC4RANDOM_BUF 1
| #define HAVE_GETRANDOM 1
| #define PHP_USE_PHP_CRYPT_R 1
| #define HAVE_FNMATCH 1
| #define HAVE_FORK 1
| #define PHP_CAN_SUPPORT_PROC_OPEN 1
| #define ENABLE_CHROOT_FUNC 1
| #define HAVE_RES_NSEARCH 1
| #define HAVE_DN_EXPAND 1
| #define HAVE_DN_SKIPNAME 1
| #define HAVE_RES_SEARCH 1
| #define HAVE_POSIX_SPAWN_FILE_ACTIONS_ADDCHDIR_NP 1
| #define HAVE_DECL_STRPTIME 1
| #define HAVE_NET_IF_H 1
| #define HAVE_GETIFADDRS 1
| #define URI_ENABLE_ANSI 1
| #define URI_NO_UNICODE 1
| #define HAVE_DLFCN_H 1
| #define HAVE_CPUID_H 1
| #define HAVE_GETPID 1
| #define HAVE_GETTID 1
| #define HAVE_KILL 1
| #define HAVE_MREMAP 1
| #define HAVE_PTHREAD_ATTR_GETSTACK 1
| #define HAVE_PTHREAD_GETATTR_NP 1
| #define HAVE_STRNLEN 1
| #define ZEND_CHECK_STACK_LIMIT 1
| #define HAVE__FPU_SETCW 1
| #define HAVE_FPU_INLINE_ASM_X86 1
| /* end confdefs.h.  */
|
| #include <stdio.h>
| #include <stdint.h>
|
| const char * const1 = "str1";
| const char * const2 = "str2";
| const char * const3 = "str3";
| uint64_t key = UINT64_C(0x9d7f71d2bd296364);
|
| uintptr_t _a = 0;
| uintptr_t _b = 0;
|
| uintptr_t __attribute__((preserve_none)) fun(uintptr_t a, uintptr_t b) {
|       _a = a;
|       _b = b;
|       return (uintptr_t)const3;
| }
|
| uintptr_t __attribute__((preserve_none)) test(void) {
|       uintptr_t ret;
|
| #if defined(__x86_64__)
|       __asm__ __volatile__(
|               /* XORing to make it unlikely the value exists in any other register */
|               "movq %1, %%r12\n"
|               "xorq %3, %%r12\n"
|               "movq %2, %%r13\n"
|               "xorq %3, %%r13\n"
|               "xorq %%rax, %%rax\n"
|               "call fun\n"
|               : "=a" (ret)
|               : "r" (const1), "r" (const2), "r" (key)
|               : "r12", "r13"
|       );
| #elif defined(__aarch64__)
|       __asm__ __volatile__(
|               /* XORing to make it unlikely the value exists in any other register */
|               "eor    x20, %1, %3\n"
|               "eor    x21, %2, %3\n"
|               "eor    x0, x0, x0\n"
|               "bl     fun\n"
|               "mov    %0, x0\n"
|               : "=r" (ret)
|               : "r" (const1), "r" (const2), "r" (key)
|               : "x0", "x21", "x22", "x30"
|       );
| #else
| # error
| #endif
|
|       return ret;
| }
|
| int main(void) {
|
|       /* JIT is making the following expectations about preserve_none:
|        * - The registers used for integer args 1 and 2
|        * - The register used for a single integer return value
|        *
|        * We check these expectations here:
|        */
|
|       uintptr_t ret = test();
|
|       if (_a != ((uintptr_t)const1 ^ key)) {
|               fprintf(stderr, "arg1 mismatch\n");
|               return 1;
|       }
|       if (_b != ((uintptr_t)const2 ^ key)) {
|               fprintf(stderr, "arg2 mismatch\n");
|               return 2;
|       }
|       if (ret != (uintptr_t)const3) {
|               fprintf(stderr, "ret mismatch\n");
|               return 3;
|       }
|
|       fprintf(stderr, "OK\n");
|
|       return 0;
| }
configure:81731: result:
...
php_cv_preserve_none=no
```

But I expected this output instead:
```
php_cv_preserve_none=yes
```

FYI, when using 

```bash
CC=clang CFLAGS="-O2 -flto" ./configure --disable-all --enable-cli php_cv_preserve_none=yes | grep preserve_none -n2
```

The check is skipped and compilation later succeeds and also gives the speed up (another ~2% over clang).

### PHP Version

```plain
master/8.5
```

### Operating System

Linux