mwilliams
c4b56e312d
If the global was not defined, it would try to return a pointer into the MInstrCtx, which was not passed in. We dont actually need it though, because in that case we can just return a pointer to init_null_variant.
HipHop VM for PHP
HipHop VM (HHVM) is a new open-source virtual machine designed for executing programs written in PHP. HHVM uses a just-in-time compilation approach to achieve superior performance while maintaining the flexibility that PHP developers are accustomed to. HipHop VM (and before it HPHPc) has realized >5x increase in throughput for Facebook compared with Zend PHP 5.2.
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