Opportunistic write-back discard of single-use vector register values

A method of preparing an executable program code for performing opportunistic write-back discard of single-use vector register values, the method comprising:

• inserting one or more hint instructions into an executable program code of a graphics processing unit (GPU) that demarcate one or more single-use sections;
• executing one or more instructions of the GPU in a default mode;
• executing the one or more hint instructions;
• detecting a beginning of the one or more single-use sections that include the one or more instructions of the GPU that produce one or more single-use vector register values, wherein detecting the beginning of the single-use section includes executing a hint instruction, multiple single-use sections being encoded into the hint instruction;
• and
• executing the one or more instructions of the GPU in a single-use mode associated with the one or more single-use sections.

A system comprising:

• one or more microprocessors configured to:
• execute one or more instructions of a graphics processing unit (GPU) in a default mode;
• detect a beginning of a single-use section based on executing a hint instruction, the single-use section including one or more instructions that produce one or more single-use vector register values, multiple single-use sections being encoded into the hint instruction;
• and
• execute one or more instructions of the GPU in a single-use mode associated with the single-use section.