[Python-checkins] Move predispatch logic from DISPATCH macro to juts before switch. Reduces size of each opocde in interpreter. (GH-28475)
pablogsal
webhook-mailer at python.org
Wed Sep 29 08:16:22 EDT 2021
https://github.com/python/cpython/commit/2be4c370c6bfe98a85aa01c5d9c333b804d26197
commit: 2be4c370c6bfe98a85aa01c5d9c333b804d26197
branch: 3.10
author: Mark Shannon <mark at hotpy.org>
committer: pablogsal <Pablogsal at gmail.com>
date: 2021-09-29T13:16:13+01:00
summary:
Move predispatch logic from DISPATCH macro to juts before switch. Reduces size of each opocde in interpreter. (GH-28475)
files:
M Python/ceval.c
diff --git a/Python/ceval.c b/Python/ceval.c
index 429ddb82bd66d..686250e1a8f94 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -1297,12 +1297,6 @@ eval_frame_handle_pending(PyThreadState *tstate)
#if USE_COMPUTED_GOTOS
#define TARGET(op) op: TARGET_##op
-#define DISPATCH_GOTO() goto *opcode_targets[opcode]
-#else
-#define TARGET(op) op
-#define DISPATCH_GOTO() goto dispatch_opcode
-#endif
-
#define DISPATCH() \
{ \
if (trace_info.cframe.use_tracing OR_DTRACE_LINE OR_LLTRACE) { \
@@ -1310,8 +1304,13 @@ eval_frame_handle_pending(PyThreadState *tstate)
} \
f->f_lasti = INSTR_OFFSET(); \
NEXTOPARG(); \
- DISPATCH_GOTO(); \
+ goto *opcode_targets[opcode]; \
}
+#else
+#define TARGET(op) op
+#define DISPATCH() goto predispatch;
+#endif
+
#define CHECK_EVAL_BREAKER() \
if (_Py_atomic_load_relaxed(eval_breaker)) { \
@@ -1827,7 +1826,16 @@ _PyEval_EvalFrameDefault(PyThreadState *tstate, PyFrameObject *f, int throwflag)
}
}
#endif
+#if USE_COMPUTED_GOTOS == 0
+ goto dispatch_opcode;
+ predispatch:
+ if (trace_info.cframe.use_tracing OR_DTRACE_LINE OR_LLTRACE) {
+ goto tracing_dispatch;
+ }
+ f->f_lasti = INSTR_OFFSET();
+ NEXTOPARG();
+#endif
dispatch_opcode:
#ifdef DYNAMIC_EXECUTION_PROFILE
#ifdef DXPAIRS
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