bpo-46841: Quicken code in-place (GH-31888)

* Moves the bytecode to the end of the corresponding PyCodeObject, and quickens it in-place.

* Removes the almost-always-unused co_varnames, co_freevars, and co_cellvars member caches

* _PyOpcode_Deopt is a new mapping from all opcodes to their un-quickened forms.

* _PyOpcode_InlineCacheEntries is renamed to _PyOpcode_Caches

* _Py_IncrementCountAndMaybeQuicken is renamed to _PyCode_Warmup

* _Py_Quicken is renamed to _PyCode_Quicken

* _co_quickened is renamed to _co_code_adaptive (and is now a read-only memoryview).

* Do not emit unused nonzero opargs anymore in the compiler.

1 files changed, 4 insertions, 4 deletions

diff --git a/Python/compile.c b/Python/compile.c
index 950c44a..e24f425 100644
--- a/Python/compile.c
+++ b/Python/compile.c
@@ -134,9 +134,9 @@ static int
 instr_size(struct instr *instruction)
 {
     int opcode = instruction->i_opcode;
-    int oparg = instruction->i_oparg;
+    int oparg = HAS_ARG(opcode) ? instruction->i_oparg : 0;
     int extended_args = (0xFFFFFF < oparg) + (0xFFFF < oparg) + (0xFF < oparg);
-    int caches = _PyOpcode_InlineCacheEntries[opcode];
+    int caches = _PyOpcode_Caches[opcode];
     return extended_args + 1 + caches;
 }
 
@@ -144,8 +144,8 @@ static void
 write_instr(_Py_CODEUNIT *codestr, struct instr *instruction, int ilen)
 {
     int opcode = instruction->i_opcode;
-    int oparg = instruction->i_oparg;
-    int caches = _PyOpcode_InlineCacheEntries[opcode];
+    int oparg = HAS_ARG(opcode) ? instruction->i_oparg : 0;
+    int caches = _PyOpcode_Caches[opcode];
     switch (ilen - caches) {
         case 4:
             *codestr++ = _Py_MAKECODEUNIT(EXTENDED_ARG, (oparg >> 24) & 0xFF);