gh-158165: Fix _Py_get_machine_stack_pointer() compilation with MinGW

Author: corona10

Include/internal/pycore_pystate.h

@@ -317,14 +317,16 @@ static uintptr_t return_pointer_as_int(char* p) {
 static inline uintptr_t
 _Py_get_machine_stack_pointer(void) {
     uintptr_t result;
-#if defined(_M_ARM64)
+#if _Py__has_builtin(__builtin_stack_address)
+    result = (uintptr_t)__builtin_stack_address();
+#elif defined(_MSC_VER) && defined(_M_ARM64)
     result = __getReg(31);
-#elif defined(_M_X64) || defined(_M_IX86)
+#elif defined(_MSC_VER) && (defined(_M_X64) || defined(_M_IX86))
     result = (uintptr_t)_AddressOfReturnAddress();
 #elif defined(__aarch64__)
     __asm__ ("mov %0, sp" : "=r" (result));
 #elif defined(__x86_64__)
-    __asm__("{movq %%rsp, %0" : "=r" (result));
+    __asm__ ("{movq %%rsp, %0|mov %0, rsp}" : "=r" (result));
 #else
     char here;
     result = (uintptr_t)&here;

Misc/NEWS.d/next/Core_and_Builtins/2026-09-25-22-34-50.gh-issue-158165.GVPxKy.rst

@@ -0,0 +1,2 @@
+Fix compilation of ``_Py_get_machine_stack_pointer()` with MinGW on Windows.
+Patch by Donghee Na.