Merge branch 'runtime_rework' into fix_gc

bench_native.ce

@@ -0,0 +1,183 @@
+// bench_native.ce — compare VM vs native execution speed
+//
+// Usage:
+//   cell --dev bench_native.ce <module.cm> [iterations]
+//
+// Compiles (if needed) and benchmarks a module via both VM and native dylib.
+// Reports median/mean timing per benchmark + speedup ratio.
+
+var os = use('os')
+var fd = use('fd')
+
+if (length(args) < 1) {
+  print('usage: cell --dev bench_native.ce <module.cm> [iterations]')
+  return
+}
+
+var file = args[0]
+var name = file
+if (ends_with(name, '.cm')) {
+  name = text(name, 0, length(name) - 3)
+}
+
+var iterations = 11
+if (length(args) > 1) {
+  iterations = number(args[1])
+}
+
+def WARMUP = 3
+
+var safe = replace(replace(name, '/', '_'), '-', '_')
+var symbol = 'js_' + safe + '_use'
+var dylib_path = './' + file + '.dylib'
+
+// --- Statistics ---
+
+var stat_sort = function(arr) {
+  return sort(arr)
+}
+
+var stat_median = function(arr) {
+  if (length(arr) == 0) return 0
+  var sorted = stat_sort(arr)
+  var mid = floor(length(arr) / 2)
+  if (length(arr) % 2 == 0) {
+    return (sorted[mid - 1] + sorted[mid]) / 2
+  }
+  return sorted[mid]
+}
+
+var stat_mean = function(arr) {
+  if (length(arr) == 0) return 0
+  var sum = reduce(arr, function(a, b) { return a + b })
+  return sum / length(arr)
+}
+
+var format_ns = function(ns) {
+  if (ns < 1000) return text(round(ns)) + 'ns'
+  if (ns < 1000000) return text(round(ns / 1000 * 100) / 100) + 'us'
+  if (ns < 1000000000) return text(round(ns / 1000000 * 100) / 100) + 'ms'
+  return text(round(ns / 1000000000 * 100) / 100) + 's'
+}
+
+// --- Collect benchmarks from module ---
+
+var collect_benches = function(mod) {
+  var benches = []
+  if (is_function(mod)) {
+    push(benches, {name: 'main', fn: mod})
+  } else if (is_object(mod)) {
+    var keys = array(mod)
+    var i = 0
+    while (i < length(keys)) {
+      var k = keys[i]
+      if (is_function(mod[k])) {
+        push(benches, {name: k, fn: mod[k]})
+      }
+      i = i + 1
+    }
+  }
+  return benches
+}
+
+// --- Run one benchmark function ---
+
+var run_bench = function(fn, label) {
+  var samples = []
+  var i = 0
+  var t1 = 0
+  var t2 = 0
+
+  // warmup
+  i = 0
+  while (i < WARMUP) {
+    fn(1)
+    i = i + 1
+  }
+
+  // collect samples
+  i = 0
+  while (i < iterations) {
+    t1 = os.now()
+    fn(1)
+    t2 = os.now()
+    push(samples, t2 - t1)
+    i = i + 1
+  }
+
+  return {
+    label: label,
+    median: stat_median(samples),
+    mean: stat_mean(samples)
+  }
+}
+
+// --- Load VM module ---
+
+print('loading VM module: ' + file)
+var vm_mod = use(name)
+var vm_benches = collect_benches(vm_mod)
+
+if (length(vm_benches) == 0) {
+  print('no benchmarkable functions found in ' + file)
+  return
+}
+
+// --- Load native module ---
+
+var native_mod = null
+var native_benches = []
+var has_native = fd.is_file(dylib_path)
+
+if (has_native) {
+  print('loading native module: ' + dylib_path)
+  var lib = os.dylib_open(dylib_path)
+  native_mod = os.dylib_symbol(lib, symbol)
+  native_benches = collect_benches(native_mod)
+} else {
+  print('no ' + dylib_path + ' found -- VM-only benchmarking')
+  print('  hint: cell --dev compile.ce ' + file)
+}
+
+// --- Run benchmarks ---
+
+print('')
+print('samples: ' + text(iterations) + ' (warmup: ' + text(WARMUP) + ')')
+print('')
+
+var pad = function(s, n) {
+  while (length(s) < n) s = s + ' '
+  return s
+}
+
+var i = 0
+while (i < length(vm_benches)) {
+  var b = vm_benches[i]
+  var vm_result = run_bench(b.fn, 'vm')
+
+  print(pad(b.name, 20) + '  VM: ' + pad(format_ns(vm_result.median), 12) + ' (median)  ' + format_ns(vm_result.mean) + ' (mean)')
+
+  // find matching native bench
+  var j = 0
+  var found = false
+  while (j < length(native_benches)) {
+    if (native_benches[j].name == b.name) {
+      var nat_result = run_bench(native_benches[j].fn, 'native')
+      print(pad('', 20) + '  NT: ' + pad(format_ns(nat_result.median), 12) + ' (median)  ' + format_ns(nat_result.mean) + ' (mean)')
+
+      if (nat_result.median > 0) {
+        var speedup = vm_result.median / nat_result.median
+        print(pad('', 20) + '  speedup: ' + text(round(speedup * 100) / 100) + 'x')
+      }
+      found = true
+    }
+    j = j + 1
+  }
+
+  if (has_native && !found) {
+    print(pad('', 20) + '  NT: (no matching function)')
+  }
+
+  print('')
+  i = i + 1
+}

compile.ce

@@ -1,7 +1,7 @@
 // compile.ce — compile a .cm module to native .dylib via QBE
 //
 // Usage:
-//   cell --core . compile.ce <file.cm>
+//   cell --dev compile.ce <file.cm>
 //
 // Produces <file>.dylib in the current directory.
 
@@ -9,7 +9,7 @@ var fd = use('fd')
 var os = use('os')
 
 if (length(args) < 1) {
-  print('usage: cell --core . compile.ce <file.cm>')
+  print('usage: cell --dev compile.ce <file.cm>')
   return
 }
 
@@ -26,39 +26,22 @@ var ssa_path = tmp + '.ssa'
 var s_path = tmp + '.s'
 var o_path = tmp + '.o'
 var rt_o_path = '/tmp/qbe_rt.o'
-var dylib_path = base + '.dylib'
+var dylib_path = file + '.dylib'
 var cwd = fd.getcwd()
 var rc = 0
 
 // Step 1: emit QBE IL
 print('emit qbe...')
-rc = os.system('cd ' + cwd + ' && ./cell --core . --emit-qbe ' + file + ' > ' + ssa_path)
+rc = os.system('cd ' + cwd + ' && ./cell --dev qbe.ce ' + file + ' > ' + ssa_path)
 if (rc != 0) {
   print('failed to emit qbe il')
   return
 }
 
-// Step 2: post-process — insert dead labels after ret/jmp, append wrapper
+// Step 2: append wrapper function — called as symbol(ctx) by os.dylib_symbol.
-// Use awk via shell to avoid blob/slurpwrite issues with long strings
-print('post-process...')
-var awk_cmd = `awk '
-  need_label && /^[[:space:]]*[^@}]/ && NF > 0 {
-    print "@_dead_" dead_id; dead_id++; need_label=0
-  }
-  /^@/ || /^}/ || NF==0 { need_label=0 }
-  /^[[:space:]]*ret / || /^[[:space:]]*jmp / { need_label=1; print; next }
-  { print }
-' ` + ssa_path + ` > ` + tmp + `_fixed.ssa`
-rc = os.system(awk_cmd)
-if (rc != 0) {
-  print('post-process failed')
-  return
-}
-
-// Append wrapper function — called as symbol(ctx) by os.dylib_symbol.
 // Delegates to cell_rt_module_entry which heap-allocates a frame
 // (so closures survive) and calls cell_main.
-var wrapper_cmd = `printf '\nexport function l $` + symbol + `(l %%ctx) {\n@entry\n  %%result =l call $cell_rt_module_entry(l %%ctx)\n  ret %%result\n}\n' >> ` + tmp + `_fixed.ssa`
+var wrapper_cmd = `printf '\nexport function l $` + symbol + `(l %%ctx) {\n@entry\n  %%result =l call $cell_rt_module_entry(l %%ctx)\n  ret %%result\n}\n' >> ` + ssa_path
 rc = os.system(wrapper_cmd)
 if (rc != 0) {
   print('wrapper append failed')
@@ -67,7 +50,7 @@ if (rc != 0) {
 
 // Step 3: compile QBE IL to assembly
 print('qbe compile...')
-rc = os.system('~/.local/bin/qbe -o ' + s_path + ' ' + tmp + '_fixed.ssa')
+rc = os.system('qbe -o ' + s_path + ' ' + ssa_path)
 if (rc != 0) {
   print('qbe compilation failed')
   return

compile_seed.ce

@@ -0,0 +1,98 @@
+// compile_seed.ce — compile a .cm module to native .dylib via QBE (seed mode)
+// Usage: ./cell --dev --seed compile_seed <file.cm>
+
+var fd = use("fd")
+var os = use("os")
+var tokenize = use("tokenize")
+var parse = use("parse")
+var fold = use("fold")
+var mcode = use("mcode")
+var streamline = use("streamline")
+var qbe_macros = use("qbe")
+var qbe_emit = use("qbe_emit")
+
+if (length(args) < 1) {
+  print("usage: cell --dev --seed compile_seed <file.cm>")
+  disrupt
+}
+
+var file = args[0]
+var base = file
+if (ends_with(base, ".cm")) {
+  base = text(base, 0, length(base) - 3)
+} else if (ends_with(base, ".ce")) {
+  base = text(base, 0, length(base) - 3)
+}
+
+var safe = replace(replace(replace(base, "/", "_"), "-", "_"), ".", "_")
+var symbol = "js_" + safe + "_use"
+var tmp = "/tmp/qbe_" + safe
+var ssa_path = tmp + ".ssa"
+var s_path = tmp + ".s"
+var o_path = tmp + ".o"
+var rt_o_path = "/tmp/qbe_rt.o"
+var dylib_path = file + ".dylib"
+var rc = 0
+
+// Step 1: compile to QBE IL
+print("compiling " + file + " to QBE IL...")
+var src = text(fd.slurp(file))
+var result = tokenize(src, file)
+var ast = parse(result.tokens, src, file, tokenize)
+var folded = fold(ast)
+var compiled = mcode(folded)
+var optimized = streamline(compiled)
+var il = qbe_emit(optimized, qbe_macros)
+
+// Step 2: append wrapper function
+var wrapper = `
+export function l $${symbol}(l %ctx) {
+@entry
+  %result =l call $cell_rt_module_entry(l %ctx)
+  ret %result
+}
+`
+il = il + wrapper
+
+// Write IL to file — remove old file first to avoid leftover content
+if (fd.is_file(ssa_path)) fd.unlink(ssa_path)
+var out_fd = fd.open(ssa_path, 1537, 420)
+fd.write(out_fd, il)
+fd.close(out_fd)
+print("wrote " + ssa_path + " (" + text(length(il)) + " bytes)")
+
+// Step 3: compile QBE IL to assembly
+print("qbe compile...")
+rc = os.system("qbe -o " + s_path + " " + ssa_path)
+if (rc != 0) {
+  print("qbe compilation failed")
+  disrupt
+}
+
+// Step 4: assemble
+print("assemble...")
+rc = os.system("cc -c " + s_path + " -o " + o_path)
+if (rc != 0) {
+  print("assembly failed")
+  disrupt
+}
+
+// Step 5: compile runtime stubs
+if (!fd.is_file(rt_o_path)) {
+  print("compile runtime stubs...")
+  rc = os.system("cc -c source/qbe_helpers.c -o " + rt_o_path + " -fPIC -Isource")
+  if (rc != 0) {
+    print("runtime stubs compilation failed")
+    disrupt
+  }
+}
+
+// Step 6: link dylib
+print("link...")
+rc = os.system("cc -shared -fPIC -undefined dynamic_lookup " + o_path + " " + rt_o_path + " -o " + dylib_path)
+if (rc != 0) {
+  print("linking failed")
+  disrupt
+}
+
+print("built: " + dylib_path)

mcode.cm

@@ -280,19 +280,70 @@ var mcode = function(ast) {
     return node.kind == "null"
   }
 
-  // emit_add_decomposed: emit generic add (VM dispatches int/float/text)
+  // emit_add_decomposed: emit type-dispatched add (text → concat, num → add)
   // reads _bp_dest, _bp_left, _bp_right, _bp_ln, _bp_rn from closure
   var emit_add_decomposed = function() {
-    // Known text+text → concat directly (skip numeric check in VM)
     if (is_known_text(_bp_ln) && is_known_text(_bp_rn)) {
       emit_3("concat", _bp_dest, _bp_left, _bp_right)
       return null
     }
+    if (is_known_number(_bp_ln) && is_known_number(_bp_rn)) {
       emit_3("add", _bp_dest, _bp_left, _bp_right)
       return null
     }
+    // Unknown types: emit full dispatch
+    var t0 = alloc_slot()
+    var t1 = alloc_slot()
+    var done = gen_label("add_done")
+    var check_num = gen_label("add_cn")
 
-  // emit_numeric_binop removed — generic ops emitted directly via passthrough
+    // Check text path first (since add doubles as concat)
+    emit_2("is_text", t0, _bp_left)
+    emit_jump_cond("jump_false", t0, check_num)
+    emit_2("is_text", t1, _bp_right)
+    emit_jump_cond("jump_false", t1, check_num)
+    emit_3("concat", _bp_dest, _bp_left, _bp_right)
+    emit_jump(done)
+
+    // Numeric path
+    var err = gen_label("add_err")
+    emit_label(check_num)
+    emit_2("is_num", t0, _bp_left)
+    emit_jump_cond("jump_false", t0, err)
+    emit_2("is_num", t1, _bp_right)
+    emit_jump_cond("jump_false", t1, err)
+    emit_3("add", _bp_dest, _bp_left, _bp_right)
+    emit_jump(done)
+
+    emit_label(err)
+    emit_0("disrupt")
+    emit_label(done)
+    return null
+  }
+
+  // emit_numeric_binop: emit type-guarded numeric binary op
+  // reads _bp_dest, _bp_left, _bp_right, _bp_ln, _bp_rn from closure
+  var emit_numeric_binop = function(op_str) {
+    if (is_known_number(_bp_ln) && is_known_number(_bp_rn)) {
+      emit_3(op_str, _bp_dest, _bp_left, _bp_right)
+      return null
+    }
+    var t0 = alloc_slot()
+    var t1 = alloc_slot()
+    var err = gen_label("num_err")
+    var done = gen_label("num_done")
+    emit_2("is_num", t0, _bp_left)
+    emit_jump_cond("jump_false", t0, err)
+    emit_2("is_num", t1, _bp_right)
+    emit_jump_cond("jump_false", t1, err)
+    emit_3(op_str, _bp_dest, _bp_left, _bp_right)
+    emit_jump(done)
+
+    emit_label(err)
+    emit_0("disrupt")
+    emit_label(done)
+    return null
+  }
 
   // emit_eq_decomposed: identical -> int -> float -> text -> null -> bool -> mismatch(false)
   // reads _bp_dest, _bp_left, _bp_right from closure
@@ -518,11 +569,25 @@ var mcode = function(ast) {
     return null
   }
 
-  // emit_neg_decomposed: emit generic negate (VM dispatches int/float)
+  // emit_neg_decomposed: emit type-guarded negate
   var emit_neg_decomposed = function(dest, src, src_node) {
+    if (is_known_number(src_node)) {
       emit_2("negate", dest, src)
       return null
     }
+    var t0 = alloc_slot()
+    var err = gen_label("neg_err")
+    var done = gen_label("neg_done")
+    emit_2("is_num", t0, src)
+    emit_jump_cond("jump_false", t0, err)
+    emit_2("negate", dest, src)
+    emit_jump(done)
+
+    emit_label(err)
+    emit_0("disrupt")
+    emit_label(done)
+    return null
+  }
 
   // Central router: maps op string to decomposition helper
   // Sets _bp_* closure vars then calls helper with reduced args
@@ -547,9 +612,11 @@ var mcode = function(ast) {
       rel = relational_ops[op_str]
       if (rel != null) {
         emit_relational(rel[0], rel[1], rel[2])
+      } else if (op_str == "subtract" || op_str == "multiply" ||
+                 op_str == "divide" || op_str == "modulo" || op_str == "pow") {
+        emit_numeric_binop(op_str)
       } else {
-        // Passthrough for subtract, multiply, divide, modulo,
+        // Passthrough for bitwise, in, etc.
-        // bitwise, pow, in, etc.
         emit_3(op_str, dest, left, right)
       }
     }

qbe.cm

@@ -98,6 +98,7 @@ var is_text = function(p, v) {
   jmp @${p}.done
 @${p}.no
   %${p} =w copy 0
+  jmp @${p}.done
 @${p}.done
 `
 }
@@ -174,6 +175,7 @@ var to_float64 = function(p, v) {
   %${p}.fbits =l or %${p}.fs63, %${p}.fe52
   %${p}.fbits =l or %${p}.fbits, %${p}.fmant
   %${p} =d cast %${p}.fbits
+  jmp @${p}.done
 @${p}.done
 `
 }
@@ -199,201 +201,37 @@ var new_bool = function(p, b) {
 
 // new_float64 — C call to __JS_NewFloat64(ctx, val). Result: %{p}
 var new_float64 = function(p, ctx, d) {
-  return `  %${p} =l call $__JS_NewFloat64(l ${ctx}, d ${d})
+  return `  %${p} =l call $qbe_new_float64(l ${ctx}, d ${d})
 `
 }
 
 // ============================================================
-// Arithmetic — add(p, ctx, a, b)
+// Arithmetic — add/sub/mul/div/mod(p, ctx, a, b)
-// Int fast path inline, text concat and float as C calls.
+// Simple C call wrappers. Type dispatch is handled in mcode.cm.
-// Jumps to @disrupt on type mismatch.
 // ============================================================
 
 var add = function(p, ctx, a, b) {
-  return `@${p}.start
+  return `  %${p} =l call $qbe_float_add(l ${ctx}, l ${a}, l ${b})
-  %${p}.at =l and ${a}, 1
-  %${p}.bt =l and ${b}, 1
-  %${p}.not_int =l or %${p}.at, %${p}.bt
-  jnz %${p}.not_int, @${p}.not_both_int, @${p}.int_path
-@${p}.int_path
-  %${p}.ia =l sar ${a}, 1
-  %${p}.ib =l sar ${b}, 1
-  %${p}.sum =l add %${p}.ia, %${p}.ib
-  %${p}.lo =w csltl %${p}.sum, ${int32_min}
-  %${p}.hi =w csgtl %${p}.sum, ${int32_max}
-  %${p}.ov =w or %${p}.lo, %${p}.hi
-  jnz %${p}.ov, @${p}.int_overflow, @${p}.int_ok
-@${p}.int_ok
-  %${p}.rw =w copy %${p}.sum
-  %${p}.rext =l extuw %${p}.rw
-  %${p} =l shl %${p}.rext, 1
-  jmp @${p}.done
-@${p}.int_overflow
-  %${p}.fd =d sltof %${p}.sum
-  %${p} =l call $__JS_NewFloat64(l ${ctx}, d %${p}.fd)
-  jmp @${p}.done
-@${p}.not_both_int
-  %${p}.a_is_text =w call $JS_IsText(l ${a})
-  %${p}.b_is_text =w call $JS_IsText(l ${b})
-  %${p}.both_text =w and %${p}.a_is_text, %${p}.b_is_text
-  jnz %${p}.both_text, @${p}.text_path, @${p}.chk_num
-@${p}.text_path
-  %${p} =l call $JS_ConcatString(l ${ctx}, l ${a}, l ${b})
-  jmp @${p}.done
-@${p}.chk_num
-  %${p}.a_is_num =w call $JS_IsNumber(l ${a})
-  %${p}.b_is_num =w call $JS_IsNumber(l ${b})
-  %${p}.both_num =w and %${p}.a_is_num, %${p}.b_is_num
-  jnz %${p}.both_num, @${p}.float_path, @disrupt
-@${p}.float_path
-  %${p} =l call $qbe_float_add(l ${ctx}, l ${a}, l ${b})
-@${p}.done
 `
 }
 
 var sub = function(p, ctx, a, b) {
-  return `@${p}.start
+  return `  %${p} =l call $qbe_float_sub(l ${ctx}, l ${a}, l ${b})
-  %${p}.at =l and ${a}, 1
-  %${p}.bt =l and ${b}, 1
-  %${p}.not_int =l or %${p}.at, %${p}.bt
-  jnz %${p}.not_int, @${p}.not_both_int, @${p}.int_path
-@${p}.int_path
-  %${p}.ia =l sar ${a}, 1
-  %${p}.ib =l sar ${b}, 1
-  %${p}.diff =l sub %${p}.ia, %${p}.ib
-  %${p}.lo =w csltl %${p}.diff, ${int32_min}
-  %${p}.hi =w csgtl %${p}.diff, ${int32_max}
-  %${p}.ov =w or %${p}.lo, %${p}.hi
-  jnz %${p}.ov, @${p}.int_overflow, @${p}.int_ok
-@${p}.int_ok
-  %${p}.rw =w copy %${p}.diff
-  %${p}.rext =l extuw %${p}.rw
-  %${p} =l shl %${p}.rext, 1
-  jmp @${p}.done
-@${p}.int_overflow
-  %${p}.fd =d sltof %${p}.diff
-  %${p} =l call $__JS_NewFloat64(l ${ctx}, d %${p}.fd)
-  jmp @${p}.done
-@${p}.not_both_int
-  %${p}.a_is_num =w call $JS_IsNumber(l ${a})
-  %${p}.b_is_num =w call $JS_IsNumber(l ${b})
-  %${p}.both_num =w and %${p}.a_is_num, %${p}.b_is_num
-  jnz %${p}.both_num, @${p}.float_path, @disrupt
-@${p}.float_path
-  %${p} =l call $qbe_float_sub(l ${ctx}, l ${a}, l ${b})
-@${p}.done
 `
 }
 
 var mul = function(p, ctx, a, b) {
-  return `@${p}.start
+  return `  %${p} =l call $qbe_float_mul(l ${ctx}, l ${a}, l ${b})
-  %${p}.at =l and ${a}, 1
-  %${p}.bt =l and ${b}, 1
-  %${p}.not_int =l or %${p}.at, %${p}.bt
-  jnz %${p}.not_int, @${p}.not_both_int, @${p}.int_path
-@${p}.int_path
-  %${p}.ia =l sar ${a}, 1
-  %${p}.ib =l sar ${b}, 1
-  %${p}.prod =l mul %${p}.ia, %${p}.ib
-  %${p}.lo =w csltl %${p}.prod, ${int32_min}
-  %${p}.hi =w csgtl %${p}.prod, ${int32_max}
-  %${p}.ov =w or %${p}.lo, %${p}.hi
-  jnz %${p}.ov, @${p}.int_overflow, @${p}.int_ok
-@${p}.int_ok
-  %${p}.rw =w copy %${p}.prod
-  %${p}.rext =l extuw %${p}.rw
-  %${p} =l shl %${p}.rext, 1
-  jmp @${p}.done
-@${p}.int_overflow
-  %${p}.fd =d sltof %${p}.prod
-  %${p} =l call $__JS_NewFloat64(l ${ctx}, d %${p}.fd)
-  jmp @${p}.done
-@${p}.not_both_int
-  %${p}.a_is_num =w call $JS_IsNumber(l ${a})
-  %${p}.b_is_num =w call $JS_IsNumber(l ${b})
-  %${p}.both_num =w and %${p}.a_is_num, %${p}.b_is_num
-  jnz %${p}.both_num, @${p}.float_path, @disrupt
-@${p}.float_path
-  %${p} =l call $qbe_float_mul(l ${ctx}, l ${a}, l ${b})
-@${p}.done
 `
 }
 
 var div = function(p, ctx, a, b) {
-  return `@${p}.start
+  return `  %${p} =l call $qbe_float_div(l ${ctx}, l ${a}, l ${b})
-  %${p}.at =l and ${a}, 1
-  %${p}.bt =l and ${b}, 1
-  %${p}.not_int =l or %${p}.at, %${p}.bt
-  jnz %${p}.not_int, @${p}.not_both_int, @${p}.int_path
-@${p}.int_path
-  %${p}.ia =w copy 0
-  %${p}.tmp =l sar ${a}, 1
-  %${p}.ia =w copy %${p}.tmp
-  %${p}.ib =w copy 0
-  %${p}.tmp2 =l sar ${b}, 1
-  %${p}.ib =w copy %${p}.tmp2
-  %${p}.div0 =w ceqw %${p}.ib, 0
-  jnz %${p}.div0, @${p}.ret_null, @${p}.chk_exact
-@${p}.ret_null
-  %${p} =l copy ${js_null}
-  jmp @${p}.done
-@${p}.chk_exact
-  %${p}.rem =w rem %${p}.ia, %${p}.ib
-  %${p}.exact =w ceqw %${p}.rem, 0
-  jnz %${p}.exact, @${p}.int_div, @${p}.int_to_float
-@${p}.int_div
-  %${p}.q =w div %${p}.ia, %${p}.ib
-  %${p}.qext =l extuw %${p}.q
-  %${p} =l shl %${p}.qext, 1
-  jmp @${p}.done
-@${p}.int_to_float
-  %${p}.da =d swtof %${p}.ia
-  %${p}.db =d swtof %${p}.ib
-  %${p}.dr =d div %${p}.da, %${p}.db
-  %${p} =l call $__JS_NewFloat64(l ${ctx}, d %${p}.dr)
-  jmp @${p}.done
-@${p}.not_both_int
-  %${p}.a_is_num =w call $JS_IsNumber(l ${a})
-  %${p}.b_is_num =w call $JS_IsNumber(l ${b})
-  %${p}.both_num =w and %${p}.a_is_num, %${p}.b_is_num
-  jnz %${p}.both_num, @${p}.float_path, @disrupt
-@${p}.float_path
-  %${p} =l call $qbe_float_div(l ${ctx}, l ${a}, l ${b})
-@${p}.done
 `
 }
 
 var mod = function(p, ctx, a, b) {
-  return `@${p}.start
+  return `  %${p} =l call $qbe_float_mod(l ${ctx}, l ${a}, l ${b})
-  %${p}.at =l and ${a}, 1
-  %${p}.bt =l and ${b}, 1
-  %${p}.not_int =l or %${p}.at, %${p}.bt
-  jnz %${p}.not_int, @${p}.not_both_int, @${p}.int_path
-@${p}.int_path
-  %${p}.ia =w copy 0
-  %${p}.tmp =l sar ${a}, 1
-  %${p}.ia =w copy %${p}.tmp
-  %${p}.ib =w copy 0
-  %${p}.tmp2 =l sar ${b}, 1
-  %${p}.ib =w copy %${p}.tmp2
-  %${p}.div0 =w ceqw %${p}.ib, 0
-  jnz %${p}.div0, @${p}.ret_null, @${p}.do_mod
-@${p}.ret_null
-  %${p} =l copy ${js_null}
-  jmp @${p}.done
-@${p}.do_mod
-  %${p}.r =w rem %${p}.ia, %${p}.ib
-  %${p}.rext =l extuw %${p}.r
-  %${p} =l shl %${p}.rext, 1
-  jmp @${p}.done
-@${p}.not_both_int
-  %${p}.a_is_num =w call $JS_IsNumber(l ${a})
-  %${p}.b_is_num =w call $JS_IsNumber(l ${b})
-  %${p}.both_num =w and %${p}.a_is_num, %${p}.b_is_num
-  jnz %${p}.both_num, @${p}.float_path, @disrupt
-@${p}.float_path
-  %${p} =l call $qbe_float_mod(l ${ctx}, l ${a}, l ${b})
-@${p}.done
 `
 }
 
@@ -484,6 +322,7 @@ var cmp = function(p, ctx, a, b) {
   jmp @${p}.done
 @${p}.mismatch
   %${p} =l copy ${mismatch_val}
+  jmp @${p}.done
 @${p}.done
 `
 }
@@ -518,90 +357,28 @@ var gt = function(p, ctx, a, b) {
 
 var ge = function(p, ctx, a, b) {
   _qflags = {int_cmp_op: "csgew", float_id: 5, is_eq: false, is_ne: false, null_true: true}
+  return cmp(p, ctx, a, b)
 }
 
 // ============================================================
 // Unary Ops
 // ============================================================
 
-// neg(p, ctx, v) — negate. Int fast path (INT32_MIN edge case), else C call.
+// neg(p, ctx, v) — negate via C call (type guards in mcode)
 var neg = function(p, ctx, v) {
-  return `@${p}.start
+  return `  %${p} =l call $qbe_float_neg(l ${ctx}, l ${v})
-  %${p}.tag =l and ${v}, 1
-  %${p}.is_int =w ceql %${p}.tag, 0
-  jnz %${p}.is_int, @${p}.int_path, @${p}.float_path
-@${p}.int_path
-  %${p}.sl =l sar ${v}, 1
-  %${p}.iw =w copy %${p}.sl
-  %${p}.is_min =w ceqw %${p}.iw, ${int32_min}
-  jnz %${p}.is_min, @${p}.min_overflow, @${p}.int_ok
-@${p}.min_overflow
-  %${p}.fd =d swtof %${p}.iw
-  %${p}.fdn =d neg %${p}.fd
-  %${p} =l call $__JS_NewFloat64(l ${ctx}, d %${p}.fdn)
-  jmp @${p}.done
-@${p}.int_ok
-  %${p}.ni =w sub 0, %${p}.iw
-  %${p}.niext =l extuw %${p}.ni
-  %${p} =l shl %${p}.niext, 1
-  jmp @${p}.done
-@${p}.float_path
-  %${p} =l call $qbe_float_neg(l ${ctx}, l ${v})
-@${p}.done
 `
 }
 
-// inc(p, ctx, v) — increment. Int fast path (INT32_MAX edge case), else C call.
+// inc(p, ctx, v) — increment via C call (type guards in mcode)
 var inc = function(p, ctx, v) {
-  return `@${p}.start
+  return `  %${p} =l call $qbe_float_inc(l ${ctx}, l ${v})
-  %${p}.tag =l and ${v}, 1
-  %${p}.is_int =w ceql %${p}.tag, 0
-  jnz %${p}.is_int, @${p}.int_path, @${p}.float_path
-@${p}.int_path
-  %${p}.sl =l sar ${v}, 1
-  %${p}.iw =w copy %${p}.sl
-  %${p}.is_max =w ceqw %${p}.iw, ${int32_max}
-  jnz %${p}.is_max, @${p}.max_overflow, @${p}.int_ok
-@${p}.max_overflow
-  %${p}.fd =d swtof %${p}.iw
-  %${p}.fd1 =d add %${p}.fd, d_1.0
-  %${p} =l call $__JS_NewFloat64(l ${ctx}, d %${p}.fd1)
-  jmp @${p}.done
-@${p}.int_ok
-  %${p}.ni =w add %${p}.iw, 1
-  %${p}.niext =l extuw %${p}.ni
-  %${p} =l shl %${p}.niext, 1
-  jmp @${p}.done
-@${p}.float_path
-  %${p} =l call $qbe_float_inc(l ${ctx}, l ${v})
-@${p}.done
 `
 }
 
-// dec(p, ctx, v) — decrement. Int fast path (INT32_MIN edge case), else C call.
+// dec(p, ctx, v) — decrement via C call (type guards in mcode)
 var dec = function(p, ctx, v) {
-  return `@${p}.start
+  return `  %${p} =l call $qbe_float_dec(l ${ctx}, l ${v})
-  %${p}.tag =l and ${v}, 1
-  %${p}.is_int =w ceql %${p}.tag, 0
-  jnz %${p}.is_int, @${p}.int_path, @${p}.float_path
-@${p}.int_path
-  %${p}.sl =l sar ${v}, 1
-  %${p}.iw =w copy %${p}.sl
-  %${p}.is_min =w ceqw %${p}.iw, ${int32_min}
-  jnz %${p}.is_min, @${p}.min_overflow, @${p}.int_ok
-@${p}.min_overflow
-  %${p}.fd =d swtof %${p}.iw
-  %${p}.fd1 =d sub %${p}.fd, d_1.0
-  %${p} =l call $__JS_NewFloat64(l ${ctx}, d %${p}.fd1)
-  jmp @${p}.done
-@${p}.int_ok
-  %${p}.ni =w sub %${p}.iw, 1
-  %${p}.niext =l extuw %${p}.ni
-  %${p} =l shl %${p}.niext, 1
-  jmp @${p}.done
-@${p}.float_path
-  %${p} =l call $qbe_float_dec(l ${ctx}, l ${v})
-@${p}.done
 `
 }
 
@@ -615,22 +392,9 @@ var lnot = function(p, ctx, v) {
 `
 }
 
-// bnot(p, ctx, v) — bitwise not. Convert to int32, ~, re-tag.
+// bnot(p, ctx, v) — bitwise not via C call
 var bnot = function(p, ctx, v) {
-  return `@${p}.start
+  return `  %${p} =l call $qbe_bnot(l ${ctx}, l ${v})
-  %${p}.tag =l and ${v}, 1
-  %${p}.is_int =w ceql %${p}.tag, 0
-  jnz %${p}.is_int, @${p}.int_path, @${p}.slow_path
-@${p}.int_path
-  %${p}.sl =l sar ${v}, 1
-  %${p}.iw =w copy %${p}.sl
-  %${p}.nw =w xor %${p}.iw, -1
-  %${p}.nex =l extuw %${p}.nw
-  %${p} =l shl %${p}.nex, 1
-  jmp @${p}.done
-@${p}.slow_path
-  %${p} =l call $qbe_bnot(l ${ctx}, l ${v})
-@${p}.done
 `
 }
 
@@ -639,92 +403,34 @@ var bnot = function(p, ctx, v) {
 // Both operands must be numeric. Int fast path, float -> convert to int32.
 // ============================================================
 
-// reads _qop from closure
+var band = function(p, ctx, a, b) {
-var bitwise_op = function(p, ctx, a, b) {
+  return `  %${p} =l call $qbe_bitwise_and(l ${ctx}, l ${a}, l ${b})
-  var qbe_op = _qop
-  return `@${p}.start
-  %${p}.at =l and ${a}, 1
-  %${p}.bt =l and ${b}, 1
-  %${p}.not_int =l or %${p}.at, %${p}.bt
-  jnz %${p}.not_int, @${p}.slow_path, @${p}.int_path
-@${p}.int_path
-  %${p}.ia =l sar ${a}, 1
-  %${p}.iaw =w copy %${p}.ia
-  %${p}.ib =l sar ${b}, 1
-  %${p}.ibw =w copy %${p}.ib
-  %${p}.rw =w ${qbe_op} %${p}.iaw, %${p}.ibw
-  %${p}.rext =l extuw %${p}.rw
-  %${p} =l shl %${p}.rext, 1
-  jmp @${p}.done
-@${p}.slow_path
-  %${p}.a_is_num =w call $JS_IsNumber(l ${a})
-  %${p}.b_is_num =w call $JS_IsNumber(l ${b})
-  %${p}.both_num =w and %${p}.a_is_num, %${p}.b_is_num
-  jnz %${p}.both_num, @${p}.float_to_int, @disrupt
-@${p}.float_to_int
-  %${p} =l call $qbe_bitwise_${qbe_op}(l ${ctx}, l ${a}, l ${b})
-@${p}.done
 `
 }
 
-var band = function(p, ctx, a, b) {
-  _qop = "and"
-  return bitwise_op(p, ctx, a, b)
-}
-
 var bor = function(p, ctx, a, b) {
-  _qop = "or"
+  return `  %${p} =l call $qbe_bitwise_or(l ${ctx}, l ${a}, l ${b})
-  return bitwise_op(p, ctx, a, b)
+`
 }
 
 var bxor = function(p, ctx, a, b) {
-  _qop = "xor"
+  return `  %${p} =l call $qbe_bitwise_xor(l ${ctx}, l ${a}, l ${b})
-  return bitwise_op(p, ctx, a, b)
-}
-
-// Shift ops: mask shift amount to 5 bits (& 31)
-// reads _qop from closure
-var shift_op = function(p, ctx, a, b) {
-  var qbe_op = _qop
-  return `@${p}.start
-  %${p}.at =l and ${a}, 1
-  %${p}.bt =l and ${b}, 1
-  %${p}.not_int =l or %${p}.at, %${p}.bt
-  jnz %${p}.not_int, @${p}.slow_path, @${p}.int_path
-@${p}.int_path
-  %${p}.ia =l sar ${a}, 1
-  %${p}.iaw =w copy %${p}.ia
-  %${p}.ib =l sar ${b}, 1
-  %${p}.ibw =w copy %${p}.ib
-  %${p}.sh =w and %${p}.ibw, 31
-  %${p}.rw =w ${qbe_op} %${p}.iaw, %${p}.sh
-  %${p}.rext =l extuw %${p}.rw
-  %${p} =l shl %${p}.rext, 1
-  jmp @${p}.done
-@${p}.slow_path
-  %${p}.a_is_num =w call $JS_IsNumber(l ${a})
-  %${p}.b_is_num =w call $JS_IsNumber(l ${b})
-  %${p}.both_num =w and %${p}.a_is_num, %${p}.b_is_num
-  jnz %${p}.both_num, @${p}.float_to_int, @disrupt
-@${p}.float_to_int
-  %${p} =l call $qbe_shift_${qbe_op}(l ${ctx}, l ${a}, l ${b})
-@${p}.done
 `
 }
 
 var shl = function(p, ctx, a, b) {
-  _qop = "shl"
+  return `  %${p} =l call $qbe_shift_shl(l ${ctx}, l ${a}, l ${b})
-  return shift_op(p, ctx, a, b)
+`
 }
 
 var shr = function(p, ctx, a, b) {
-  _qop = "sar"
+  return `  %${p} =l call $qbe_shift_sar(l ${ctx}, l ${a}, l ${b})
-  return shift_op(p, ctx, a, b)
+`
 }
 
 var ushr = function(p, ctx, a, b) {
-  _qop = "shr"
+  return `  %${p} =l call $qbe_shift_shr(l ${ctx}, l ${a}, l ${b})
-  return shift_op(p, ctx, a, b)
+`
 }
 
 // ============================================================

qbe_emit.cm

@@ -76,6 +76,7 @@ var qbe_emit = function(ir, qbe) {
     var instrs = fn.instructions
     var nr_slots = fn.nr_slots
     var nr_args = fn.nr_args
+    var captured = build_captured(fn)
     var name = is_main ? "cell_main" : "cell_fn_" + text(fn_idx)
     name = sanitize(name)
     var i = 0
@@ -88,6 +89,7 @@ var qbe_emit = function(ir, qbe) {
     var p = null
     var pn = null
     var sl = null
+    var lbl = null
     var fop_id = 0
     var nr_elems = 0
     var ei = 0
@@ -113,22 +115,45 @@ var qbe_emit = function(ir, qbe) {
       emit(`  storel ${s(slot)}, %p${text(slot)}`)
     }
 
+    // Reload captured slots from frame (after invoke, closures may have modified them)
+    var reload_captured = function() {
+      var ri = 0
+      while (ri < nr_slots) {
+        if (captured[text(ri)] == true) {
+          emit(`  ${s(ri)} =l loadl %p${text(ri)}`)
+        }
+        ri = ri + 1
+      }
+    }
+
     // Walk instructions
+    // Slot loads above are not terminators
+    var last_was_term = false
     i = 0
     while (i < length(instrs)) {
       instr = instrs[i]
       i = i + 1
 
-      // Labels are plain strings
+      // Labels are plain strings; skip _nop_ur_ pseudo-labels from streamline
       if (is_text(instr)) {
-        emit("@" + sanitize(instr))
+        if (starts_with(instr, "_nop_ur_")) continue
+        lbl = sanitize(instr)
+        if (!last_was_term) {
+          emit(`  jmp @${lbl}`)
+        }
+        emit("@" + lbl)
+        last_was_term = false
         continue
       }
 
+      // Skip dead code: non-label instructions after a terminator are unreachable
+      if (last_was_term) continue
+
       op = instr[0]
       a1 = instr[1]
       a2 = instr[2]
       a3 = instr[3]
+      last_was_term = false
 
       // --- Constants ---
 
@@ -157,11 +182,11 @@ var qbe_emit = function(ir, qbe) {
           if (is_integer(a2)) {
             emit(`  ${s(a1)} =l copy ${text(a2 * 2)}`)
           } else {
-            emit(`  ${s(a1)} =l call $__JS_NewFloat64(l %ctx, d d_${text(a2)})`)
+            emit(`  ${s(a1)} =l call $qbe_new_float64(l %ctx, d d_${text(a2)})`)
           }
         } else if (is_text(a2)) {
           sl = intern_str(a2)
-          emit(`  ${s(a1)} =l call $JS_NewString(l %ctx, l ${sl})`)
+          emit(`  ${s(a1)} =l call $qbe_new_string(l %ctx, l ${sl})`)
         } else if (is_object(a2)) {
           if (a2.make == "intrinsic") {
             sl = intern_str(a2.name)
@@ -170,13 +195,13 @@ var qbe_emit = function(ir, qbe) {
             if (a2.number != null && is_integer(a2.number)) {
               emit(`  ${s(a1)} =l copy ${text(a2.number * 2)}`)
             } else if (a2.number != null) {
-              emit(`  ${s(a1)} =l call $__JS_NewFloat64(l %ctx, d d_${text(a2.number)})`)
+              emit(`  ${s(a1)} =l call $qbe_new_float64(l %ctx, d d_${text(a2.number)})`)
             } else {
               emit(`  ${s(a1)} =l copy ${text(qbe.js_null)}`)
             }
           } else if (a2.kind == "text") {
             sl = intern_str(a2.value)
-            emit(`  ${s(a1)} =l call $JS_NewString(l %ctx, l ${sl})`)
+            emit(`  ${s(a1)} =l call $qbe_new_string(l %ctx, l ${sl})`)
           } else if (a2.kind == "true") {
             emit(`  ${s(a1)} =l copy ${text(qbe.js_true)}`)
           } else if (a2.kind == "false") {
@@ -205,7 +230,7 @@ var qbe_emit = function(ir, qbe) {
 
       if (op == "add") {
         p = fresh()
-        emit(qbe.add(p, "%ctx", s(a2), s(a3)))
+        emit(`  %${p} =l call $cell_rt_add(l %ctx, l ${s(a2)}, l ${s(a3)})`)
         emit(`  ${s(a1)} =l copy %${p}`)
         wb(a1)
         continue
@@ -246,6 +271,12 @@ var qbe_emit = function(ir, qbe) {
         continue
       }
 
+      if (op == "pow") {
+        emit(`  ${s(a1)} =l call $qbe_float_pow(l %ctx, l ${s(a2)}, l ${s(a3)})`)
+        wb(a1)
+        continue
+      }
+
       // --- String concat ---
 
       if (op == "concat") {
@@ -305,6 +336,46 @@ var qbe_emit = function(ir, qbe) {
         wb(a1)
         continue
       }
+      if (op == "is_array") {
+        p = fresh()
+        emit(`  %${p} =w call $JS_IsArray(l ${s(a2)})`)
+        emit(qbe.new_bool(p + ".r", "%" + p))
+        emit(`  ${s(a1)} =l copy %${p}.r`)
+        wb(a1)
+        continue
+      }
+      if (op == "is_func") {
+        p = fresh()
+        emit(`  %${p} =w call $JS_IsFunction(l ${s(a2)})`)
+        emit(qbe.new_bool(p + ".r", "%" + p))
+        emit(`  ${s(a1)} =l copy %${p}.r`)
+        wb(a1)
+        continue
+      }
+      if (op == "is_record") {
+        p = fresh()
+        emit(`  %${p} =w call $JS_IsRecord(l ${s(a2)})`)
+        emit(qbe.new_bool(p + ".r", "%" + p))
+        emit(`  ${s(a1)} =l copy %${p}.r`)
+        wb(a1)
+        continue
+      }
+      if (op == "is_stone") {
+        p = fresh()
+        emit(`  %${p} =w call $JS_IsStone(l ${s(a2)})`)
+        emit(qbe.new_bool(p + ".r", "%" + p))
+        emit(`  ${s(a1)} =l copy %${p}.r`)
+        wb(a1)
+        continue
+      }
+      if (op == "is_proxy") {
+        p = fresh()
+        emit(`  %${p} =w call $cell_rt_is_proxy(l %ctx, l ${s(a2)})`)
+        emit(qbe.new_bool(p + ".r", "%" + p))
+        emit(`  ${s(a1)} =l copy %${p}.r`)
+        wb(a1)
+        continue
+      }
 
       // --- Comparisons (int path) ---
 
@@ -367,14 +438,30 @@ var qbe_emit = function(ir, qbe) {
         wb(a1)
         continue
       }
-      if (op == "lt_float" || op == "gt_float" || op == "le_float" || op == "ge_float") {
+      if (op == "lt_float") {
         p = fresh()
-        fop_id = 0
+        emit(qbe.lt_float(p, "%ctx", s(a2), s(a3)))
-        if (op == "lt_float") fop_id = 2
+        emit(`  ${s(a1)} =l copy %${p}`)
-        else if (op == "le_float") fop_id = 3
+        wb(a1)
-        else if (op == "gt_float") fop_id = 4
+        continue
-        else if (op == "ge_float") fop_id = 5
+      }
-        emit(qbe.cmp_float != null ? qbe.cmp_float(p, "%ctx", s(a2), s(a3), fop_id) : `  %${p} =l call $qbe_float_cmp(l %ctx, w ${text(fop_id)}, l ${s(a2)}, l ${s(a3)})`)
+      if (op == "le_float") {
+        p = fresh()
+        emit(qbe.le_float(p, "%ctx", s(a2), s(a3)))
+        emit(`  ${s(a1)} =l copy %${p}`)
+        wb(a1)
+        continue
+      }
+      if (op == "gt_float") {
+        p = fresh()
+        emit(qbe.gt_float(p, "%ctx", s(a2), s(a3)))
+        emit(`  ${s(a1)} =l copy %${p}`)
+        wb(a1)
+        continue
+      }
+      if (op == "ge_float") {
+        p = fresh()
+        emit(qbe.ge_float(p, "%ctx", s(a2), s(a3)))
         emit(`  ${s(a1)} =l copy %${p}`)
         wb(a1)
         continue
@@ -494,7 +581,10 @@ var qbe_emit = function(ir, qbe) {
       // --- Property access — runtime calls ---
 
       if (op == "load_field") {
-        pn = prop_name(a3)
+        pn = null
+        if (is_text(a3)) pn = a3
+        else if (is_object(a3) && a3.name != null) pn = a3.name
+        else if (is_object(a3) && a3.value != null) pn = a3.value
         if (pn != null) {
           sl = intern_str(pn)
           emit(`  ${s(a1)} =l call $cell_rt_load_field(l %ctx, l ${s(a2)}, l ${sl})`)
@@ -510,13 +600,28 @@ var qbe_emit = function(ir, qbe) {
         continue
       }
       if (op == "load_dynamic") {
+        pn = null
+        if (is_text(a3)) pn = a3
+        else if (is_object(a3) && a3.name != null) pn = a3.name
+        else if (is_object(a3) && a3.value != null) pn = a3.value
+        if (pn != null) {
+          sl = intern_str(pn)
+          emit(`  ${s(a1)} =l call $cell_rt_load_field(l %ctx, l ${s(a2)}, l ${sl})`)
+        } else {
           emit(`  ${s(a1)} =l call $cell_rt_load_dynamic(l %ctx, l ${s(a2)}, l ${s(a3)})`)
+        }
         wb(a1)
         continue
       }
       if (op == "store_field") {
         // IR: ["store_field", obj, val, prop] → C: (ctx, val, obj, name)
-        pn = prop_name(a3)
+        pn = null
+        if (is_text(a3)) {
+          pn = a3
+        } else if (is_object(a3)) {
+          if (a3.name != null) pn = a3.name
+          else if (a3.value != null) pn = a3.value
+        }
         if (pn != null) {
           sl = intern_str(pn)
           emit(`  call $cell_rt_store_field(l %ctx, l ${s(a2)}, l ${s(a1)}, l ${sl})`)
@@ -532,19 +637,30 @@ var qbe_emit = function(ir, qbe) {
       }
       if (op == "store_dynamic") {
         // IR: ["store_dynamic", obj, val, key] → C: (ctx, val, obj, key)
+        pn = null
+        if (is_text(a3)) pn = a3
+        else if (is_object(a3) && a3.name != null) pn = a3.name
+        else if (is_object(a3) && a3.value != null) pn = a3.value
+        if (pn != null) {
+          sl = intern_str(pn)
+          emit(`  call $cell_rt_store_field(l %ctx, l ${s(a2)}, l ${s(a1)}, l ${sl})`)
+        } else {
           emit(`  call $cell_rt_store_dynamic(l %ctx, l ${s(a2)}, l ${s(a1)}, l ${s(a3)})`)
+        }
         continue
       }
 
       // --- Closure access ---
 
       if (op == "get") {
-        emit(`  ${s(a1)} =l call $cell_rt_get_closure(l %ctx, l %fp, l ${text(a2)}, l ${text(a3)})`)
+        // mcode: get(dest, slot, depth) — a2=slot, a3=depth
+        emit(`  ${s(a1)} =l call $cell_rt_get_closure(l %ctx, l %fp, l ${text(a3)}, l ${text(a2)})`)
         wb(a1)
         continue
       }
       if (op == "put") {
-        emit(`  call $cell_rt_put_closure(l %ctx, l %fp, l ${s(a1)}, l ${text(a2)}, l ${text(a3)})`)
+        // mcode: put(val, slot, depth) — a2=slot, a3=depth
+        emit(`  call $cell_rt_put_closure(l %ctx, l %fp, l ${s(a1)}, l ${text(a3)}, l ${text(a2)})`)
         continue
       }
 
@@ -552,6 +668,7 @@ var qbe_emit = function(ir, qbe) {
 
       if (op == "jump") {
         emit(`  jmp @${sanitize(a1)}`)
+        last_was_term = true
         continue
       }
       if (op == "jump_true") {
@@ -611,6 +728,13 @@ var qbe_emit = function(ir, qbe) {
       if (op == "invoke") {
         emit(`  ${s(a2)} =l call $cell_rt_invoke(l %ctx, l ${s(a1)})`)
         wb(a2)
+        reload_captured()
+        continue
+      }
+      if (op == "tail_invoke") {
+        emit(`  ${s(a2)} =l call $cell_rt_invoke(l %ctx, l ${s(a1)})`)
+        wb(a2)
+        reload_captured()
         continue
       }
       if (op == "goframe") {
@@ -621,6 +745,7 @@ var qbe_emit = function(ir, qbe) {
       if (op == "goinvoke") {
         emit(`  %_goret =l call $cell_rt_goinvoke(l %ctx, l ${s(a1)})`)
         emit(`  ret %_goret`)
+        last_was_term = true
         continue
       }
 
@@ -664,19 +789,38 @@ var qbe_emit = function(ir, qbe) {
         continue
       }
 
+      // --- Length ---
+
+      if (op == "length") {
+        emit(`  ${s(a1)} =l call $JS_CellLength(l %ctx, l ${s(a2)})`)
+        wb(a1)
+        continue
+      }
+
       // --- Misc ---
 
       if (op == "return") {
         emit(`  ret ${s(a1)}`)
+        last_was_term = true
         continue
       }
       if (op == "disrupt") {
         emit(`  call $cell_rt_disrupt(l %ctx)`)
         emit(`  ret ${text(qbe.js_null)}`)
+        last_was_term = true
         continue
       }
       if (op == "delete") {
+        pn = null
+        if (is_text(a3)) pn = a3
+        else if (is_object(a3) && a3.name != null) pn = a3.name
+        else if (is_object(a3) && a3.value != null) pn = a3.value
+        if (pn != null) {
+          sl = intern_str(pn)
+          emit(`  ${s(a1)} =l call $cell_rt_delete(l %ctx, l ${s(a2)}, l ${sl})`)
+        } else {
           emit(`  ${s(a1)} =l call $cell_rt_delete(l %ctx, l ${s(a2)}, l ${s(a3)})`)
+        }
         wb(a1)
         continue
       }
@@ -690,6 +834,14 @@ var qbe_emit = function(ir, qbe) {
       emit(`  # unknown: ${op}`)
     }
 
+    // Emit @disrupt landing pad for arithmetic type-error branches
+    if (!last_was_term) {
+      emit("  jmp @disrupt")
+    }
+    emit("@disrupt")
+    emit(`  call $cell_rt_disrupt(l %ctx)`)
+    emit(`  ret ${text(qbe.js_null)}`)
+
     emit("}")
     emit("")
   }
@@ -698,6 +850,70 @@ var qbe_emit = function(ir, qbe) {
   // Main: compile all functions then main
   // ============================================================
 
+  // ============================================================
+  // Pre-scan: find which slots each function has that are modified
+  // by child closures (via "put" instructions at depth=1).
+  // Build a map: fn_idx → array of captured slot numbers.
+  // ============================================================
+
+  // For each function, find which fn_idxes it creates via "function" op
+  var find_children = function(fn_instrs) {
+    var children = []
+    var ci = 0
+    var cinstr = null
+    while (ci < length(fn_instrs)) {
+      cinstr = fn_instrs[ci]
+      ci = ci + 1
+      if (!is_array(cinstr)) continue
+      if (cinstr[0] == "function") {
+        push(children, cinstr[2])
+      }
+    }
+    return children
+  }
+
+  // For a child function, find which parent slots it writes to via put(val, slot, depth=1)
+  var find_put_slots = function(fn_instrs) {
+    var slots = []
+    var pi = 0
+    var pinstr = null
+    while (pi < length(fn_instrs)) {
+      pinstr = fn_instrs[pi]
+      pi = pi + 1
+      if (!is_array(pinstr)) continue
+      // put format: ["put", val, slot, depth]
+      if (pinstr[0] == "put" && pinstr[3] == 1) {
+        push(slots, pinstr[2])
+      }
+    }
+    return slots
+  }
+
+  // Build captured_slots for each function (and main)
+  var build_captured = function(fn) {
+    var children = find_children(fn.instructions)
+    var captured = {}
+    var bi = 0
+    var child_idx = 0
+    var child_fn = null
+    var pslots = null
+    var si = 0
+    while (bi < length(children)) {
+      child_idx = children[bi]
+      bi = bi + 1
+      if (child_idx >= 0 && child_idx < length(ir.functions)) {
+        child_fn = ir.functions[child_idx]
+        pslots = find_put_slots(child_fn.instructions)
+        si = 0
+        while (si < length(pslots)) {
+          captured[text(pslots[si])] = true
+          si = si + 1
+        }
+      }
+    }
+    return captured
+  }
+
   var fi = 0
   while (fi < length(ir.functions)) {
     compile_fn(ir.functions[fi], fi, false)

run_native.ce

@@ -1,16 +1,16 @@
 // run_native.ce — load a module both interpreted and native, compare speed
 //
 // Usage:
-//   cell --core . run_native.ce <module>
+//   cell --dev run_native.ce <module>
 //
-// Loads <module>.cm via use() (interpreted) and <module>.dylib (native),
+// Loads <module>.cm via use() (interpreted) and <module>.cm.dylib (native),
 // runs both and compares results and timing.
 
 var os = use('os')
 
 if (length(args) < 1) {
-  print('usage: cell --core . run_native.ce <module>')
+  print('usage: cell --dev run_native.ce <module>')
-  print('  e.g. cell --core . run_native.ce num_torture')
+  print('  e.g. cell --dev run_native.ce num_torture')
   return
 }
 
@@ -21,7 +21,7 @@ if (ends_with(name, '.cm')) {
 
 var safe = replace(replace(name, '/', '_'), '-', '_')
 var symbol = 'js_' + safe + '_use'
-var dylib_path = './' + name + '.dylib'
+var dylib_path = './' + name + '.cm.dylib'
 var fd = use('fd')
 
 // --- Test argument for function-returning modules ---

run_native_seed.ce

@@ -0,0 +1,78 @@
+// run_native_seed.ce — load and run a native .dylib module (seed mode)
+// Usage: ./cell --dev --seed run_native_seed benches/fibonacci
+
+var fd = use("fd")
+var os = use("os")
+
+if (length(args) < 1) {
+  print("usage: cell --dev --seed run_native_seed <module>")
+  disrupt
+}
+
+var name = args[0]
+if (ends_with(name, ".cm")) {
+  name = text(name, 0, length(name) - 3)
+}
+
+var safe = replace(replace(name, "/", "_"), "-", "_")
+var symbol = "js_" + safe + "_use"
+var dylib_path = "./" + name + ".cm.dylib"
+
+var test_arg = 30
+if (length(args) > 1) {
+  test_arg = number(args[1])
+}
+
+// --- Interpreted run ---
+print("--- interpreted ---")
+var t1 = os.now()
+var mod_interp = use(name)
+var t2 = os.now()
+var result_interp = null
+if (is_function(mod_interp)) {
+  print("module returns a function, calling with " + text(test_arg))
+  t1 = os.now()
+  result_interp = mod_interp(test_arg)
+  t2 = os.now()
+}
+result_interp = result_interp != null ? result_interp : mod_interp
+var ms_interp = (t2 - t1) / 1000000
+print("result: " + text(result_interp))
+print("time:   " + text(ms_interp) + " ms")
+
+// --- Native run ---
+if (!fd.is_file(dylib_path)) {
+  print("\nno " + dylib_path + " found")
+  disrupt
+}
+
+print("\n--- native ---")
+var t3 = os.now()
+var lib = os.dylib_open(dylib_path)
+var t4 = os.now()
+var mod_native = os.dylib_symbol(lib, symbol)
+var t5 = os.now()
+var result_native = null
+if (is_function(mod_native)) {
+  print("module returns a function, calling with " + text(test_arg))
+  t4 = os.now()
+  result_native = mod_native(test_arg)
+  t5 = os.now()
+}
+result_native = result_native != null ? result_native : mod_native
+var ms_native = (t5 - t3) / 1000000
+var ms_exec = (t5 - t4) / 1000000
+print("result: " + text(result_native))
+print("load:   " + text((t4 - t3) / 1000000) + " ms")
+print("exec:   " + text(ms_exec) + " ms")
+print("total:  " + text(ms_native) + " ms")
+
+// --- Comparison ---
+print("\n--- comparison ---")
+print("match:  " + text(result_interp == result_native))
+if (ms_native > 0) {
+  print("speedup: " + text(ms_interp / ms_native) + "x (total)")
+}
+if (ms_exec > 0) {
+  print("speedup: " + text(ms_interp / ms_exec) + "x (exec only)")
+}

source/qbe_helpers.c

@@ -9,6 +9,15 @@
 #include "quickjs-internal.h"
 #include <math.h>
 
+/* Non-inline wrappers for static inline functions in quickjs.h */
+JSValue qbe_new_float64(JSContext *ctx, double d) {
+  return __JS_NewFloat64(ctx, d);
+}
+
+JSValue qbe_new_string(JSContext *ctx, const char *str) {
+  return JS_NewString(ctx, str);
+}
+
 /* Comparison op IDs (must match qbe.cm float_cmp_op_id values) */
 enum {
   QBE_CMP_EQ = 0,
@@ -42,6 +51,16 @@ JSValue qbe_float_add(JSContext *ctx, JSValue a, JSValue b) {
   return qbe_float_binop(ctx, a, b, op_add);
 }
 
+/* Generic add: concat if both text, float add if both numeric, else type error */
+JSValue cell_rt_add(JSContext *ctx, JSValue a, JSValue b) {
+  if (JS_IsText(a) && JS_IsText(b))
+    return JS_ConcatString(ctx, a, b);
+  if (JS_IsNumber(a) && JS_IsNumber(b))
+    return qbe_float_binop(ctx, a, b, op_add);
+  JS_ThrowTypeError(ctx, "cannot add incompatible types");
+  return JS_NULL;
+}
+
 JSValue qbe_float_sub(JSContext *ctx, JSValue a, JSValue b) {
   return qbe_float_binop(ctx, a, b, op_sub);
 }
@@ -446,6 +465,15 @@ JSValue cell_rt_ne_tol(JSContext *ctx, JSValue a, JSValue b) {
   return JS_NewBool(ctx, a != b);
 }
 
+/* --- Type check: is_proxy (function with arity 2) --- */
+
+int cell_rt_is_proxy(JSContext *ctx, JSValue v) {
+  (void)ctx;
+  if (!JS_IsFunction(v)) return 0;
+  JSFunction *fn = JS_VALUE_GET_FUNCTION(v);
+  return fn->length == 2;
+}
+
 /* --- Disruption --- */
 
 void cell_rt_disrupt(JSContext *ctx) {