Separate the cpuinfo initialization part and call it at startup

Author: weltling

Zend/zend.c

@@ -33,6 +33,7 @@
 #include "zend_virtual_cwd.h"
 #include "zend_smart_str.h"
 #include "zend_smart_string.h"
+#include "zend_cpuinfo.h"
 
 #ifdef ZTS
 ZEND_API int compiler_globals_id;
@@ -752,6 +753,8 @@ int zend_startup(zend_utility_functions *utility_functions, char **extensions) /
 	extern zend_php_scanner_globals language_scanner_globals;
 #endif
 
+	zend_cpu_startup();
+
 #ifdef ZEND_WIN32
 	php_win32_cp_set_by_id(65001);
 #endif

Zend/zend_cpuinfo.c

@@ -27,7 +27,7 @@ typedef struct _zend_cpu_info {
 	uint32_t initialized;
 } zend_cpu_info;
 
-static zend_cpu_info cpuinfo;
+static zend_cpu_info cpuinfo = {0};
 
 #if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
 static void __zend_cpuid(uint32_t func, uint32_t subfunc) {
@@ -55,15 +55,19 @@ static void __zend_cpuid(uint32_t func, uint32_t subfunc) {
 }
 #endif
 
-ZEND_API int zend_cpu_supports(zend_cpu_feature feature) {
+void zend_cpu_startup(void)
+{
 	if (!cpuinfo.initialized) {
 		cpuinfo.initialized = 1;
 		__zend_cpuid(0, 0);
 		if (cpuinfo.eax == 0) {
-			return 0;
+			return;
 		}
 		__zend_cpuid(1, 0);
 	}
+}
+
+ZEND_API int zend_cpu_supports(zend_cpu_feature feature) {
 	if (feature & ZEND_CPU_EDX_MASK) {
 		return (cpuinfo.edx & (feature & ~ZEND_CPU_EDX_MASK));
 	} else {

Zend/zend_cpuinfo.h

@@ -93,6 +93,8 @@ typedef enum _zend_cpu_feature {
 
 ZEND_API int zend_cpu_supports(zend_cpu_feature feature);
 
+void zend_cpu_startup(void);
+
 #endif
 
 /*