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Issue #28517: Fixed of-by-one error in the peephole optimizer that caused

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keeping unreachable code.
This commit is contained in:
Serhiy Storchaka 2016-10-25 09:32:04 +03:00
commit 42bcbf76f7
4 changed files with 3114 additions and 3114 deletions
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3
Misc/NEWS
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@ -10,6 +10,9 @@ What's New in Python 3.7.0 alpha 1
Core and Builtins Core and Builtins
----------------- -----------------
- Issue #28517: Fixed of-by-one error in the peephole optimizer that caused
keeping unreachable code.
- Issue #28214: Improved exception reporting for problematic __set_name__ - Issue #28214: Improved exception reporting for problematic __set_name__
attributes. attributes.

2298
Python/importlib.h
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3923
Python/importlib_external.h
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4
Python/peephole.c
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@ -704,11 +704,11 @@ PyCode_Optimize(PyObject *code, PyObject* consts, PyObject *names,
/* Remove unreachable ops after RETURN */ /* Remove unreachable ops after RETURN */
case RETURN_VALUE: case RETURN_VALUE:
h = i + 1; h = i + 1;
while (h + 1 < codelen && ISBASICBLOCK(blocks, i, h + 1)) { while (h < codelen && ISBASICBLOCK(blocks, i, h)) {
h++; h++;
} }
if (h > i + 1) { if (h > i + 1) {
fill_nops(codestr, i + 1, h + 1); fill_nops(codestr, i + 1, h);
nexti = find_op(codestr, h); nexti = find_op(codestr, h);
} }
break; break;