backport computed gotos (#4753)
This commit is contained in:
Benjamin Peterson
parent
78ba242403
commit
2c992a0788
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@ -37,12 +37,21 @@ extern "C" {
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#define SLICE 30
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/* Also uses 31-33 */
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#define SLICE_1 31
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#define SLICE_2 32
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#define SLICE_3 33
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#define STORE_SLICE 40
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/* Also uses 41-43 */
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#define STORE_SLICE_1 41
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#define STORE_SLICE_2 42
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#define STORE_SLICE_3 43
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#define DELETE_SLICE 50
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/* Also uses 51-53 */
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#define DELETE_SLICE_1 51
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#define DELETE_SLICE_2 52
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#define DELETE_SLICE_3 53
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#define STORE_MAP 54
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#define INPLACE_ADD 55
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@ -300,6 +300,16 @@ ASDLGEN= $(srcdir)/Parser/asdl_c.py
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##########################################################################
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# Python
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OPCODETARGETS_H= \
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$(srcdir)/Python/opcode_targets.h
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OPCODETARGETGEN= \
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$(srcdir)/Python/makeopcodetargets.py
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OPCODETARGETGEN_FILES= \
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$(OPCODETARGETGEN) $(srcdir)/Lib/opcode.py
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PYTHON_OBJS= \
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Python/_warnings.o \
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Python/Python-ast.o \
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@ -671,6 +681,11 @@ Objects/bytearrayobject.o: $(srcdir)/Objects/bytearrayobject.c \
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Objects/stringobject.o: $(srcdir)/Objects/stringobject.c \
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$(STRINGLIB_HEADERS)
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$(OPCODETARGETS_H): $(OPCODETARGETGEN_FILES)
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$(OPCODETARGETGEN) $(OPCODETARGETS_H)
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Python/ceval.o: $(OPCODETARGETS_H)
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Python/formatter_unicode.o: $(srcdir)/Python/formatter_unicode.c \
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$(STRINGLIB_HEADERS)
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@ -10,6 +10,10 @@ What's New in Python 2.7.11?
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Core and Builtins
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-----------------
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- Issue #4753: On compilers where it is supported, use "computed gotos" for
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bytecode dispatch in the interpreter. This improves interpretation
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performance.
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- Issue #22939: Fixed integer overflow in iterator object. Original patch by
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Clement Rouault.
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779
Python/ceval.c
779
Python/ceval.c
File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,45 @@
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#! /usr/bin/env python
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"""Generate C code for the jump table of the threaded code interpreter
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(for compilers supporting computed gotos or "labels-as-values", such as gcc).
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"""
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# This code should stay compatible with Python 2.3, at least while
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# some of the buildbots have Python 2.3 as their system Python.
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import imp
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import os
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def find_module(modname):
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"""Finds and returns a module in the local dist/checkout.
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"""
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modpath = os.path.join(
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os.path.dirname(os.path.dirname(__file__)), "Lib")
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return imp.load_module(modname, *imp.find_module(modname, [modpath]))
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def write_contents(f):
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"""Write C code contents to the target file object.
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"""
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opcode = find_module("opcode")
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targets = ['_unknown_opcode'] * 256
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for opname, op in opcode.opmap.items():
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if opname == "STOP_CODE":
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continue
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targets[op] = "TARGET_%s" % opname.replace("+0", " ").replace("+", "_")
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f.write("static void *opcode_targets[256] = {\n")
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f.write(",\n".join([" &&%s" % s for s in targets]))
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f.write("\n};\n")
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if __name__ == "__main__":
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import sys
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assert len(sys.argv) < 3, "Too many arguments"
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if len(sys.argv) == 2:
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target = sys.argv[1]
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else:
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target = "Python/opcode_targets.h"
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f = open(target, "w")
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try:
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write_contents(f)
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finally:
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f.close()
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@ -0,0 +1,258 @@
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static void *opcode_targets[256] = {
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&&_unknown_opcode,
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&&TARGET_POP_TOP,
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&&TARGET_ROT_TWO,
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&&TARGET_ROT_THREE,
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&&TARGET_DUP_TOP,
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&&TARGET_ROT_FOUR,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&TARGET_NOP,
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&&TARGET_UNARY_POSITIVE,
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&&TARGET_UNARY_NEGATIVE,
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&&TARGET_UNARY_NOT,
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&&TARGET_UNARY_CONVERT,
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&&_unknown_opcode,
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&&TARGET_UNARY_INVERT,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&TARGET_BINARY_POWER,
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&&TARGET_BINARY_MULTIPLY,
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&&TARGET_BINARY_DIVIDE,
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&&TARGET_BINARY_MODULO,
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&&TARGET_BINARY_ADD,
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&&TARGET_BINARY_SUBTRACT,
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&&TARGET_BINARY_SUBSCR,
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&&TARGET_BINARY_FLOOR_DIVIDE,
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&&TARGET_BINARY_TRUE_DIVIDE,
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&&TARGET_INPLACE_FLOOR_DIVIDE,
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&&TARGET_INPLACE_TRUE_DIVIDE,
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&&TARGET_SLICE ,
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&&TARGET_SLICE_1,
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&&TARGET_SLICE_2,
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&&TARGET_SLICE_3,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&TARGET_STORE_SLICE ,
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&&TARGET_STORE_SLICE_1,
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&&TARGET_STORE_SLICE_2,
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&&TARGET_STORE_SLICE_3,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&TARGET_DELETE_SLICE ,
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&&TARGET_DELETE_SLICE_1,
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&&TARGET_DELETE_SLICE_2,
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&&TARGET_DELETE_SLICE_3,
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&&TARGET_STORE_MAP,
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&&TARGET_INPLACE_ADD,
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&&TARGET_INPLACE_SUBTRACT,
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&&TARGET_INPLACE_MULTIPLY,
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&&TARGET_INPLACE_DIVIDE,
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&&TARGET_INPLACE_MODULO,
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&&TARGET_STORE_SUBSCR,
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&&TARGET_DELETE_SUBSCR,
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&&TARGET_BINARY_LSHIFT,
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&&TARGET_BINARY_RSHIFT,
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&&TARGET_BINARY_AND,
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&&TARGET_BINARY_XOR,
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&&TARGET_BINARY_OR,
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&&TARGET_INPLACE_POWER,
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&&TARGET_GET_ITER,
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&&_unknown_opcode,
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&&TARGET_PRINT_EXPR,
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&&TARGET_PRINT_ITEM,
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&&TARGET_PRINT_NEWLINE,
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&&TARGET_PRINT_ITEM_TO,
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&&TARGET_PRINT_NEWLINE_TO,
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&&TARGET_INPLACE_LSHIFT,
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&&TARGET_INPLACE_RSHIFT,
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&&TARGET_INPLACE_AND,
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&&TARGET_INPLACE_XOR,
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&&TARGET_INPLACE_OR,
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&&TARGET_BREAK_LOOP,
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&&TARGET_WITH_CLEANUP,
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&&TARGET_LOAD_LOCALS,
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&&TARGET_RETURN_VALUE,
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&&TARGET_IMPORT_STAR,
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&&TARGET_EXEC_STMT,
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&&TARGET_YIELD_VALUE,
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&&TARGET_POP_BLOCK,
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&&TARGET_END_FINALLY,
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&&TARGET_BUILD_CLASS,
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&&TARGET_STORE_NAME,
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&&TARGET_DELETE_NAME,
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&&TARGET_UNPACK_SEQUENCE,
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&&TARGET_FOR_ITER,
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&&TARGET_LIST_APPEND,
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&&TARGET_STORE_ATTR,
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&&TARGET_DELETE_ATTR,
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&&TARGET_STORE_GLOBAL,
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&&TARGET_DELETE_GLOBAL,
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&&TARGET_DUP_TOPX,
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&&TARGET_LOAD_CONST,
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&&TARGET_LOAD_NAME,
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&&TARGET_BUILD_TUPLE,
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&&TARGET_BUILD_LIST,
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&&TARGET_BUILD_SET,
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&&TARGET_BUILD_MAP,
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&&TARGET_LOAD_ATTR,
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&&TARGET_COMPARE_OP,
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&&TARGET_IMPORT_NAME,
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&&TARGET_IMPORT_FROM,
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&&TARGET_JUMP_FORWARD,
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&&TARGET_JUMP_IF_FALSE_OR_POP,
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&&TARGET_JUMP_IF_TRUE_OR_POP,
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&&TARGET_JUMP_ABSOLUTE,
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&&TARGET_POP_JUMP_IF_FALSE,
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&&TARGET_POP_JUMP_IF_TRUE,
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&&TARGET_LOAD_GLOBAL,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&TARGET_CONTINUE_LOOP,
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&&TARGET_SETUP_LOOP,
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&&TARGET_SETUP_EXCEPT,
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&&TARGET_SETUP_FINALLY,
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&&_unknown_opcode,
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&&TARGET_LOAD_FAST,
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&&TARGET_STORE_FAST,
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&&TARGET_DELETE_FAST,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&TARGET_RAISE_VARARGS,
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&&TARGET_CALL_FUNCTION,
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&&TARGET_MAKE_FUNCTION,
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&&TARGET_BUILD_SLICE,
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&&TARGET_MAKE_CLOSURE,
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&&TARGET_LOAD_CLOSURE,
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&&TARGET_LOAD_DEREF,
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&&TARGET_STORE_DEREF,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&TARGET_CALL_FUNCTION_VAR,
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&&TARGET_CALL_FUNCTION_KW,
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&&TARGET_CALL_FUNCTION_VAR_KW,
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&&TARGET_SETUP_WITH,
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&&_unknown_opcode,
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&&TARGET_EXTENDED_ARG,
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&&TARGET_SET_ADD,
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&&TARGET_MAP_ADD,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode,
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&&_unknown_opcode
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};
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@ -811,6 +811,7 @@ with_libm
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with_libc
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enable_big_digits
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enable_unicode
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with_computed_gotos
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with_ensurepip
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'
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ac_precious_vars='build_alias
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@ -1494,6 +1495,9 @@ Optional Packages:
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--with-fpectl enable SIGFPE catching
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--with-libm=STRING math library
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--with-libc=STRING C library
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--with(out)-computed-gotos
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Use computed gotos in evaluation loop (enabled by
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default on supported compilers)
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--with(out)-ensurepip=[=OPTION]
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"install" or "upgrade" using bundled pip, default is
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"no"
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@ -14685,6 +14689,85 @@ for dir in $SRCDIRS; do
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mkdir $dir
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fi
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done
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# BEGIN_COMPUTED_GOTO
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# Check for --with-computed-gotos
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for --with-computed-gotos" >&5
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$as_echo_n "checking for --with-computed-gotos... " >&6; }
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# Check whether --with-computed-gotos was given.
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if test "${with_computed_gotos+set}" = set; then :
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withval=$with_computed_gotos;
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if test "$withval" = yes
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then
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$as_echo "#define USE_COMPUTED_GOTOS 1" >>confdefs.h
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
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$as_echo "yes" >&6; }
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fi
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if test "$withval" = no
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then
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$as_echo "#define USE_COMPUTED_GOTOS 0" >>confdefs.h
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
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$as_echo "no" >&6; }
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fi
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no value specified" >&5
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$as_echo "no value specified" >&6; }
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC supports computed gotos" >&5
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$as_echo_n "checking whether $CC supports computed gotos... " >&6; }
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if ${ac_cv_computed_gotos+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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if test "$cross_compiling" = yes; then :
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if test "${with_computed_gotos+set}" = set; then
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ac_cv_computed_gotos="$with_computed_gotos -- configured --with(out)-computed-gotos"
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else
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ac_cv_computed_gotos=no
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fi
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else
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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int main(int argc, char **argv)
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{
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static void *targets[1] = { &&LABEL1 };
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goto LABEL2;
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LABEL1:
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return 0;
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LABEL2:
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goto *targets[0];
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return 1;
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}
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_ACEOF
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if ac_fn_c_try_run "$LINENO"; then :
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ac_cv_computed_gotos=yes
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else
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ac_cv_computed_gotos=no
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fi
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rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
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conftest.$ac_objext conftest.beam conftest.$ac_ext
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fi
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fi
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_computed_gotos" >&5
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$as_echo "$ac_cv_computed_gotos" >&6; }
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case "$ac_cv_computed_gotos" in yes*)
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$as_echo "#define HAVE_COMPUTED_GOTOS 1" >>confdefs.h
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esac
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# END_COMPUTED_GOTO
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|
||||
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: done" >&5
|
||||
$as_echo "done" >&6; }
|
||||
|
||||
|
|
|
|||
51
configure.ac
51
configure.ac
|
|
@ -4557,6 +4557,57 @@ for dir in $SRCDIRS; do
|
|||
mkdir $dir
|
||||
fi
|
||||
done
|
||||
|
||||
# BEGIN_COMPUTED_GOTO
|
||||
# Check for --with-computed-gotos
|
||||
AC_MSG_CHECKING(for --with-computed-gotos)
|
||||
AC_ARG_WITH(computed-gotos,
|
||||
AS_HELP_STRING([--with(out)-computed-gotos],
|
||||
[Use computed gotos in evaluation loop (enabled by default on supported compilers)]),
|
||||
[
|
||||
if test "$withval" = yes
|
||||
then
|
||||
AC_DEFINE(USE_COMPUTED_GOTOS, 1,
|
||||
[Define if you want to use computed gotos in ceval.c.])
|
||||
AC_MSG_RESULT(yes)
|
||||
fi
|
||||
if test "$withval" = no
|
||||
then
|
||||
AC_DEFINE(USE_COMPUTED_GOTOS, 0,
|
||||
[Define if you want to use computed gotos in ceval.c.])
|
||||
AC_MSG_RESULT(no)
|
||||
fi
|
||||
],
|
||||
[AC_MSG_RESULT(no value specified)])
|
||||
|
||||
AC_MSG_CHECKING(whether $CC supports computed gotos)
|
||||
AC_CACHE_VAL(ac_cv_computed_gotos,
|
||||
AC_RUN_IFELSE([AC_LANG_SOURCE([[[
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
static void *targets[1] = { &&LABEL1 };
|
||||
goto LABEL2;
|
||||
LABEL1:
|
||||
return 0;
|
||||
LABEL2:
|
||||
goto *targets[0];
|
||||
return 1;
|
||||
}
|
||||
]]])],
|
||||
[ac_cv_computed_gotos=yes],
|
||||
[ac_cv_computed_gotos=no],
|
||||
[if test "${with_computed_gotos+set}" = set; then
|
||||
ac_cv_computed_gotos="$with_computed_gotos -- configured --with(out)-computed-gotos"
|
||||
else
|
||||
ac_cv_computed_gotos=no
|
||||
fi]))
|
||||
AC_MSG_RESULT($ac_cv_computed_gotos)
|
||||
case "$ac_cv_computed_gotos" in yes*)
|
||||
AC_DEFINE(HAVE_COMPUTED_GOTOS, 1,
|
||||
[Define if the C compiler supports computed gotos.])
|
||||
esac
|
||||
# END_COMPUTED_GOTO
|
||||
|
||||
AC_MSG_RESULT(done)
|
||||
|
||||
# ensurepip option
|
||||
|
|
|
|||
|
|
@ -118,6 +118,9 @@
|
|||
/* Define to 1 if you have the `clock' function. */
|
||||
#undef HAVE_CLOCK
|
||||
|
||||
/* Define if the C compiler supports computed gotos. */
|
||||
#undef HAVE_COMPUTED_GOTOS
|
||||
|
||||
/* Define to 1 if you have the `confstr' function. */
|
||||
#undef HAVE_CONFSTR
|
||||
|
||||
|
|
@ -1069,6 +1072,9 @@
|
|||
/* Define to 1 if your <sys/time.h> declares `struct tm'. */
|
||||
#undef TM_IN_SYS_TIME
|
||||
|
||||
/* Define if you want to use computed gotos in ceval.c. */
|
||||
#undef USE_COMPUTED_GOTOS
|
||||
|
||||
/* Enable extensions on AIX 3, Interix. */
|
||||
#ifndef _ALL_SOURCE
|
||||
# undef _ALL_SOURCE
|
||||
|
|
|
|||
Loading…
Reference in New Issue