gh-131798: JIT: replace _LOAD_SMALL_INT with

Zheaoli · Zheaoli · commit ee6e90bfab96 · 2025-05-21T16:11:43.000+08:00
`_LOAD_CONST_INLINE_BORROW`

Signed-off-by: Manjusaka &lt;me@manjusaka.me&gt;

add news

Signed-off-by: Manjusaka &lt;me@manjusaka.me&gt;

add tests

Signed-off-by: Manjusaka &lt;me@manjusaka.me&gt;

fix review idea

Signed-off-by: Manjusaka &lt;me@manjusaka.me&gt;
diff --git a/Lib/test/test_capi/test_opt.py b/Lib/test/test_capi/test_opt.py
@@ -2156,6 +2156,17 @@ def testfunc(n):
         self.assertIn("_GUARD_TYPE_VERSION", uops)
         self.assertNotIn("_CHECK_ATTR_CLASS", uops)
 
+    def test_load_small_int(self):
+        def testfunc(n):
+            x = 0
+            for i in range(n):
+                x += 1
+            return x
+        res, ex = self._run_with_optimizer(testfunc, TIER2_THRESHOLD)
+        self.assertEqual(res, TIER2_THRESHOLD)
+        self.assertIsNotNone(ex)
+        uops = get_opnames(ex)
+        self.assertIn("_LOAD_CONST_INLINE_BORROW", uops)
 
 def global_identity(x):
     return x
diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2025-05-21-13-57-26.gh-issue-131798.QwS5Bb.rst b/Misc/NEWS.d/next/Core_and_Builtins/2025-05-21-13-57-26.gh-issue-131798.QwS5Bb.rst
@@ -0,0 +1 @@
+JIT: replace ``_LOAD_SMALL_INT`` with ``_LOAD_CONST_INLINE_BORROW``
diff --git a/Python/optimizer_bytecodes.c b/Python/optimizer_bytecodes.c
@@ -529,6 +529,7 @@ dummy_func(void) {
 
     op(_LOAD_SMALL_INT, (-- value)) {
         PyObject *val = PyLong_FromLong(this_instr->oparg);
+        REPLACE_OP(this_instr, _LOAD_CONST_INLINE_BORROW, 0, (uintptr_t)val);
         value = sym_new_const(ctx, val);
     }
 
diff --git a/Python/optimizer_cases.c.h b/Python/optimizer_cases.c.h

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+JIT: replace ``_LOAD_SMALL_INT`` with ``_LOAD_CONST_INLINE_BORROW``
Original file line number	Diff line number	Diff line change
`@@ -529,6 +529,7 @@ dummy_func(void) {`
`529`	`529`
`530`	`530`	`op(_LOAD_SMALL_INT, (-- value)) {`
`531`	`531`	`PyObject *val = PyLong_FromLong(this_instr->oparg);`
	`532`	`+ REPLACE_OP(this_instr, _LOAD_CONST_INLINE_BORROW, 0, (uintptr_t)val);`
`532`	`533`	`value = sym_new_const(ctx, val);`
`533`	`534`	`}`
`534`	`535`