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gh-126835: Move optimization of constant sequence creation from codegen to CFG (#129426)

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Codegen phase has an optimization that transforms
```
LOAD_CONST x
LOAD_CONST y
LOAD_CONXT z
BUILD_LIST/BUILD_SET (3)
```
->
```
BUILD_LIST/BUILD_SET (0)
LOAD_CONST (x, y, z)
LIST_EXTEND/SET_UPDATE 1
```
This optimization has now been moved to CFG phase to make #128802 work.


Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com>
Co-authored-by: Yan Yanchii <yyanchiy@gmail.com>
This commit is contained in:
Kirill Podoprigora 2025-02-01 11:39:44 +00:00 • committed by GitHub
parent d89a5f6a6e
commit 7d0521d5fc
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3 changed files with 73 additions and 49 deletions
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4
Lib/test/test_dis.py
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@ -892,7 +892,7 @@ dis_loop_test_quickened_code = """\
%3d RESUME_CHECK 0
%3d BUILD_LIST 0
LOAD_CONST_MORTAL 0 ((1, 2, 3))
LOAD_CONST_MORTAL 1 ((1, 2, 3))
LIST_EXTEND 1
LOAD_SMALL_INT 3
BINARY_OP 5 (*)
@ -908,7 +908,7 @@ dis_loop_test_quickened_code = """\
%3d L2: END_FOR
POP_ITER
LOAD_CONST_IMMORTAL 1 (None)
LOAD_CONST_IMMORTAL 0 (None)
RETURN_VALUE
""" % (loop_test.__code__.co_firstlineno,
loop_test.__code__.co_firstlineno + 1,