local variable through ep experiment

vibe

a

b

Revert "a"

fix call in jit entry (

Author: XrXr

zjit/src/backend/lir.rs

@@ -3,7 +3,7 @@ use std::fmt;
 use std::mem::take;
 use std::rc::Rc;
 use crate::bitset::BitSet;
-use crate::codegen::{local_size_and_idx_to_ep_offset, perf_symbol_range_start, perf_symbol_range_end};
+use crate::codegen::{perf_symbol_range_start, perf_symbol_range_end};
 use crate::cruby::{IseqPtr, Qundef, RUBY_OFFSET_CFP_ISEQ, RUBY_OFFSET_CFP_JIT_RETURN, RUBY_OFFSET_CFP_PC, RUBY_OFFSET_CFP_SP, SIZEOF_VALUE_I32, vm_stack_canary};
 use crate::hir::{Invariant, SideExitReason};
 use crate::hir;
@@ -2621,7 +2621,7 @@ impl Assembler
     pub fn compile_exits(&mut self) -> Vec<Insn> {
         /// Restore VM state (cfp->pc, cfp->sp, stack, locals) for the side exit.
         fn compile_exit_save_state(asm: &mut Assembler, exit: &SideExit) {
-            let SideExit { pc, stack, locals, iseq, .. } = exit;
+            let SideExit { pc, stack, iseq, .. } = exit;
 
             // Side exit blocks are not part of the CFG at the moment,
             // so we need to manually ensure that patchpoints get padded
@@ -2646,12 +2646,12 @@ impl Assembler
                 }
             }
 
-            if !locals.is_empty() {
-                asm_comment!(asm, "write locals: {}", join_opnds(&locals, ", "));
-                for (idx, &opnd) in locals.iter().enumerate() {
-                    asm.store(Opnd::mem(64, SP, (-local_size_and_idx_to_ep_offset(locals.len(), idx) - 1) * SIZEOF_VALUE_I32), opnd);
-                }
-            }
+            // if !locals.is_empty() {
+            //     asm_comment!(asm, "write locals: {}", join_opnds(&locals, ", "));
+            //     for (idx, &opnd) in locals.iter().enumerate() {
+            //         asm.store(Opnd::mem(64, SP, (-local_size_and_idx_to_ep_offset(locals.len(), idx) - 1) * SIZEOF_VALUE_I32), opnd);
+            //     }
+            // }
         }
 
         /// Tear down the JIT frame and return to the interpreter.