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#1920: when considering a block starting by "while 0", the compiler optimized the

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whole construct away, even when an 'else' clause is present::

    while 0:
        print("no")
    else:
        print("yes")

did not generate any code at all.

Now the compiler emits the 'else' block, like it already does for 'if' statements.

Will backport.
This commit is contained in:
Amaury Forgeot d'Arc 2008-01-24 22:51:18 +00:00
parent 5310b69419
commit 16570f59ca
2 changed files with 13 additions and 1 deletions
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5
Python/compile.c
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@ -1598,8 +1598,11 @@ compiler_while(struct compiler *c, stmt_ty s)
basicblock *loop, *orelse, *end, *anchor = NULL;
int constant = expr_constant(s->v.While.test);
if (constant == 0)
if (constant == 0) {
if (s->v.While.orelse)
VISIT_SEQ(c, stmt, s->v.While.orelse);
return 1;
}
loop = compiler_new_block(c);
end = compiler_new_block(c);
if (constant == -1) {