Avoid unnecessary pointer params for gmtime/localtime. NFC

Seems like there is no reason to pass a pointer here.

I noticed this while investigating #19694.

Author: sbc100

src/library.js

@@ -480,8 +480,9 @@ mergeInto(LibraryManager.library, {
   },
 
   _gmtime_js__deps: ['$readI53FromI64'],
-  _gmtime_js: (time, tmPtr) => {
-    var date = new Date({{{ makeGetValue('time', 0, 'i53') }}}*1000);
+  _gmtime_js: ({{{ defineI64Param('time') }}}, tmPtr) => {
+    {{{ receiveI64ParamAsI53('time') }}}
+    var date = new Date(time * 1000);
     {{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_sec, 'date.getUTCSeconds()', 'i32') }}};
     {{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_min, 'date.getUTCMinutes()', 'i32') }}};
     {{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_hour, 'date.getUTCHours()', 'i32') }}};
@@ -513,8 +514,9 @@ mergeInto(LibraryManager.library, {
   },
 
   _localtime_js__deps: ['$readI53FromI64', '$ydayFromDate'],
-  _localtime_js: (time, tmPtr) => {
-    var date = new Date({{{ makeGetValue('time', 0, 'i53') }}}*1000);
+  _localtime_js: ({{{ defineI64Param('time') }}}, tmPtr) => {
+    {{{ receiveI64ParamAsI53('time') }}}
+    var date = new Date(time*1000);
     {{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_sec, 'date.getSeconds()', 'i32') }}};
     {{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_min, 'date.getMinutes()', 'i32') }}};
     {{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_hour, 'date.getHours()', 'i32') }}};

src/library_sigs.js

@@ -351,8 +351,8 @@ sigs = {
   _emval_take_value__sig: 'ppp',
   _emval_throw__sig: 'ip',
   _emval_typeof__sig: 'pp',
-  _gmtime_js__sig: 'vpp',
-  _localtime_js__sig: 'vpp',
+  _gmtime_js__sig: 'vjp',
+  _localtime_js__sig: 'vjp',
   _mktime_js__sig: 'ip',
   _mmap_js__sig: 'ipiiijpp',
   _msync_js__sig: 'ippiiij',

system/lib/libc/emscripten_internal.h

@@ -41,8 +41,8 @@ void emscripten_notify_memory_growth(size_t memory_index);
 // TODO(sbc): Covert back to `time_t` before 2038 ...
 int _timegm_js(struct tm* tm);
 int _mktime_js(struct tm* tm);
-void _localtime_js(const time_t* __restrict__ t, struct tm* __restrict__ tm);
-void _gmtime_js(const time_t* __restrict__ t, struct tm* __restrict__ tm);
+void _localtime_js(time_t t, struct tm* __restrict__ tm);
+void _gmtime_js(time_t t, struct tm* __restrict__ tm);
 
 void _tzset_js(long* timezone, int* daylight, char** tzname);
 

system/lib/libc/mktime.c

@@ -20,15 +20,15 @@ weak time_t mktime(struct tm *tm) {
 
 weak struct tm *__localtime_r(const time_t *restrict t, struct tm *restrict tm) {
   tzset();
-  _localtime_js(t, tm);
+  _localtime_js(*t, tm);
   // __localtime_js sets everything but the tmzone pointer
   tm->__tm_zone = tm->tm_isdst ? tzname[1] :tzname[0];
   return tm;
 }
 
 weak struct tm *__gmtime_r(const time_t *restrict t, struct tm *restrict tm) {
   tzset();
-  _gmtime_js(t, tm);
+  _gmtime_js(*t, tm);
   tm->tm_isdst = 0;
   tm->__tm_gmtoff = 0;
   tm->__tm_zone = "GMT";