A Study of the E ects of Compiler - Controlled Speculation onInstruction and Data

Compiler-controlled speculation has been shown to be eeec-tive in increasing instruction level parallelism (ILP) found in non-numeric programs. However, it is not clear the extent to which speculatively scheduled code may aaect the instruction and data caches. In particular, the amount of time spent resolving cache misses may be signiicant enough to prevent the more aggressive speculation models from attaining their best potential performance results. The objective of this paper is to quantify these eeects using aggressive speculation models.