Stop incrementing `jit_entry_calls` once threshold is hit

Otherwise the ISeq page will constantly be written
into preventing it from being shared.

vm.c

@@ -381,19 +381,16 @@ static VALUE vm_invoke_proc(rb_execution_context_t *ec, rb_proc_t *proc, VALUE s
 static inline rb_jit_func_t
 jit_compile(rb_execution_context_t *ec)
 {
-    // Increment the ISEQ's call counter
     const rb_iseq_t *iseq = ec->cfp->iseq;
     struct rb_iseq_constant_body *body = ISEQ_BODY(iseq);
     bool yjit_enabled = rb_yjit_compile_new_iseqs();
-    if (yjit_enabled || rb_rjit_call_p) {
-        body->jit_entry_calls++;
-    }
-    else {
+    if (!(yjit_enabled || rb_rjit_call_p)) {
         return NULL;
     }
 
-    // Trigger JIT compilation if not compiled
+    // Increment the ISEQ's call counter and trigger JIT compilation if not compiled
     if (body->jit_entry == NULL) {
+        body->jit_entry_calls++;
         if (yjit_enabled) {
             if (rb_yjit_threshold_hit(iseq, body->jit_entry_calls)) {
                 rb_yjit_compile_iseq(iseq, ec, false);
@@ -436,20 +433,19 @@ jit_exec(rb_execution_context_t *ec)
 static inline rb_jit_func_t
 jit_compile_exception(rb_execution_context_t *ec)
 {
-    // Increment the ISEQ's call counter
     const rb_iseq_t *iseq = ec->cfp->iseq;
     struct rb_iseq_constant_body *body = ISEQ_BODY(iseq);
-    if (rb_yjit_compile_new_iseqs()) {
-        body->jit_exception_calls++;
-    }
-    else {
+    if (!rb_yjit_compile_new_iseqs()) {
         return NULL;
     }
 
-    // Trigger JIT compilation if not compiled
-    if (body->jit_exception == NULL && rb_yjit_threshold_hit(iseq, body->jit_exception_calls)) {
+    // Increment the ISEQ's call counter and trigger JIT compilation if not compiled
+    if (body->jit_exception == NULL) {
+        body->jit_exception_calls++;
+        if (rb_yjit_threshold_hit(iseq, body->jit_exception_calls)) {
             rb_yjit_compile_iseq(iseq, ec, true);
         }
+    }
     return body->jit_exception;
 }