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GH-113464: Add a JIT backend for tier 2 (GH-113465)

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Add an option (--enable-experimental-jit for configure-based builds
or --experimental-jit for PCbuild-based ones) to build an
*experimental* just-in-time compiler, based on copy-and-patch (https://fredrikbk.com/publications/copy-and-patch.pdf).

See Tools/jit/README.md for more information on how to install the required build-time tooling.
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Brandt Bucher 2024-01-28 18:48:48 -08:00 • committed by GitHub
parent f7c05d7ad3
commit f6d9e5926b
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29 changed files with 1738 additions and 5 deletions
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20
Python/ceval.c
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@ -11,6 +11,7 @@
#include "pycore_function.h"
#include "pycore_instruments.h"
#include "pycore_intrinsics.h"
#include "pycore_jit.h"
#include "pycore_long.h" // _PyLong_GetZero()
#include "pycore_moduleobject.h" // PyModuleObject
#include "pycore_object.h" // _PyObject_GC_TRACK()
@ -955,9 +956,24 @@ resume_with_error:
// The Tier 2 interpreter is also here!
// Tier 2 is also here!
enter_tier_two:
#ifdef _Py_JIT
; // ;)
jit_func jitted = current_executor->jit_code;
next_instr = jitted(frame, stack_pointer, tstate);
frame = tstate->current_frame;
Py_DECREF(current_executor);
if (next_instr == NULL) {
goto resume_with_error;
}
stack_pointer = _PyFrame_GetStackPointer(frame);
DISPATCH();
#else
#undef LOAD_IP
#define LOAD_IP(UNUSED) (void)0
@ -1073,6 +1089,8 @@ deoptimize:
Py_DECREF(current_executor);
DISPATCH();
#endif // _Py_JIT
}
#if defined(__GNUC__)
# pragma GCC diagnostic pop