Viewing file:  Dead_temp_cleanup.h (953 B) -rw-rw-r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* phc -- the open source PHP compiler
* See doc/license/README.license for licensing information
*
* The lowering passes introduce a lot of unnecessary copies, which
* add extra reference counts, resulting in extra copying and poor
* performance.
*
* This removes assignments from simple variables to compiler-generated
* temporaries, so long as the temporary is never used.
*
* HACK TODO: Remove.
* This is exactly the sort of hacky thing we wanted
* to remove. This would be much better done with a data-flow
* framework, but is much easier than cleaning up the passes, which
* would otherwise be necessary.
*
*/
#ifndef PHC_DEAD_TEMP_CLEANUP
#define PHC_DEAD_TEMP_CLEANUP
#include "Fix_point.h"
class Dead_temp_cleanup : public Fix_point
{
public:
Dead_temp_cleanup ();
void children_php_script (HIR::PHP_script* in);
void pre_assign_var (HIR::Assign_var* in, HIR::Statement_list* out);
};
#endif // PHC_DEAD_TEMP_CLEANUP
|