Add profiling for opt_send_without_block

Split out from the CCall changes since we discussed during pairing that
this is useful to unblock some other changes. No tests since no one
consumes this profiling data yet.

Author: XrXr

insns.def

@@ -890,6 +890,7 @@ opt_send_without_block
 (CALL_DATA cd)
 (...)
 (VALUE val)
+// attr bool zjit_profile = true;
 // attr bool handles_sp = true;
 // attr rb_snum_t sp_inc = sp_inc_of_sendish(cd->ci);
 // attr rb_snum_t comptime_sp_inc = sp_inc_of_sendish(ci);

zjit/src/cruby_bindings.inc.rs

@@ -1389,7 +1389,7 @@ pub fn iseq_to_hir(iseq: *const rb_iseq_t) -> Result<Function, ParseError> {
                     break;  // Don't enqueue the next block as a successor
                 }
 
-                YARVINSN_opt_send_without_block => {
+                YARVINSN_opt_send_without_block | YARVINSN_zjit_opt_send_without_block => {
                     let cd: *const rb_call_data = get_arg(pc, 0).as_ptr();
                     let call_info = unsafe { rb_get_call_data_ci(cd) };
                     let argc = unsafe { vm_ci_argc((*cd).ci) };

zjit/src/hir.rs

@@ -24,6 +24,11 @@ impl Profiler {
         }
     }
 
+    // Get an instruction operand that sits next to the opcode at PC.
+    fn insn_opnd(&self, idx: usize) -> VALUE {
+        unsafe { get_cfp_pc(self.cfp).add(1 + idx).read() }
+    }
+
     // Peek at the nth topmost value on the Ruby stack.
     // Returns the topmost value when n == 0.
     fn peek_at_stack(&self, n: isize) -> VALUE {
@@ -57,6 +62,12 @@ fn profile_insn(profiler: &mut Profiler, opcode: ruby_vminsn_type) {
         YARVINSN_opt_le    => profile_operands(profiler, 2),
         YARVINSN_opt_gt    => profile_operands(profiler, 2),
         YARVINSN_opt_ge    => profile_operands(profiler, 2),
+        YARVINSN_opt_send_without_block => {
+            let cd: *const rb_call_data = profiler.insn_opnd(0).as_ptr();
+            let argc = unsafe { vm_ci_argc((*cd).ci) };
+            // Profile all the arguments and self (+1).
+            profile_operands(profiler, (argc + 1) as usize);
+        }
         _ => {}
     }
 }