Abstract: Techniques for dead producer elimination are described. In an embodiment, an apparatus includes micro-operation (uop) fusion circuitry to analyze a line of uops to find a producer uop and a consumer uop meeting fusibility criteria and to morph the consumer uop into a fused uop, wherein the line of uops includes a number of uops corresponding to a maximum number of uops that can be allocated in a single cycle; dead producer elimination (DPE) circuitry to determine that DPE conditions are satisfied; and an arithmetic-logic unit to execute the fused uop without the producer uop having been executed.

Abstract: Techniques for per allocation cycle micro-operation fusion are described. In an embodiment, an apparatus includes micro-operation (uop) fusion circuitry and an arithmetic-logic unit (ALU). The uop fusion circuitry is to analyze a line of uops to find a producer uop and a consumer uop meeting fusibility criteria and to morph the consumer uop into a fused uop, wherein the line of uops includes a number of uops corresponding to maximum number of uops that can be allocated in a single cycle. The ALU is to execute the fused uop.