Method and system for hard ware-assisted pre-execution

A computer system, comprising:

• a processor;
• and
• a memory coupled to the processor and storing instructions which, when executed by the processor, cause the processor to perform a method, the method comprising:
• determining a pre-execution code region comprising one or more instructions;
• incrementing a global counter by detecting a start instruction in hardware associated with the one or more instructions;
• issuing a first instruction by setting, in a first entry for the first instruction in a data structure, a first prefetch region identifier with a value of the global counter;
• responsive to a head pointer of the data structure reaching the first entry:
• determining, based on a non-zero value for the first prefetch region identifier, that the first entry cannot be allocated;
• and
• advancing the head pointer to a next entry in the data structure, which causes a load associated with the first entry to be a non-blocking load;
• and
• resetting the global counter by detecting a stop instruction in the hardware associated with the one or more instructions.

A non-transitory computer-readable storage medium storing instructions that when executed by a computer cause the computer to perform a method, the method comprising:

• determining a pre-execution code region comprising one or more instructions;
• incrementing a global counter upon initiating the one or more instructions;
• issuing a first instruction, which involves setting, in a first entry for the first instruction in a data structure, a first prefetch region identifier with a current value of the global counter;
• responsive to a head pointer of the data structure reaching the first entry:
• determining, based on a non-zero value for the first prefetch region identifier, that the first entry is not available to be allocated;
• and
• advancing the head pointer to a next entry in the data structure, which renders a load associated with the first entry as a non-blocking load;
• and
• resetting the global counter upon completing the one or more instructions.