Comment #12 on issue 3926 by [email protected]: Let/const in CaseBlock
https://code.google.com/p/v8/issues/detail?id=3926
The logic in fullcodegen to perform hole check elimination is pretty
simple. It checks if the scope for reading is the same as the scope for
definition, and if the use comes after the definition. Clearly, this is
wrong for switch! Here's the code from full-codegen-ia32.cc:
skip_init_check = var->mode() != CONST_LEGACY &&
var->initializer_position() < proxy->position();
It should be possible to just check that the current scope isn't a switch
and disable this optimization, right?
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