From 7bda9de5504382931822baecba7f85028031c2cd Mon Sep 17 00:00:00 2001
From: Eric Snow <ericsnowcurrently@gmail.com>
Date: Fri, 8 Mar 2019 17:25:54 -0700
Subject: Simplify DISPATCH by hoisting eval_breaker ahead of time. (gh-12243)

---
 Python/ceval.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Python/ceval.c b/Python/ceval.c
index b311248..ab6a5e0 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -602,6 +602,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
     PyObject **fastlocals, **freevars;
     PyObject *retval = NULL;            /* Return value */
     PyThreadState *tstate = _PyThreadState_GET();
+    _Py_atomic_int *eval_breaker = &_PyRuntime.ceval.eval_breaker;
     PyCodeObject *co;
 
     /* when tracing we set things up so that
@@ -687,7 +688,7 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
 
 #define DISPATCH() \
     { \
-        if (!_Py_atomic_load_relaxed(&_PyRuntime.ceval.eval_breaker)) { \
+        if (!_Py_atomic_load_relaxed(eval_breaker)) { \
                     FAST_DISPATCH(); \
         } \
         continue; \
@@ -989,7 +990,7 @@ main_loop:
            async I/O handler); see Py_AddPendingCall() and
            Py_MakePendingCalls() above. */
 
-        if (_Py_atomic_load_relaxed(&_PyRuntime.ceval.eval_breaker)) {
+        if (_Py_atomic_load_relaxed(eval_breaker)) {
             opcode = _Py_OPCODE(*next_instr);
             if (opcode == SETUP_FINALLY ||
                 opcode == SETUP_WITH ||
-- 
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