We present a method for performing automatic procedure integration which selects individual call sites for inlining based on simple hueristics. The hueristics are expressed as two cost functions. One cost function models each procedure and attempts to capture the cost of inlining a procedure. The other cost function models the region around each call site, and attempts to capture the benefit of inlining a particular call site. We describe the implementation of our method in a Fortran90 research compiler prototype and present experimental results. These results demonstrate that our method achieves equal or better execution performance than that obtained by user directed inline expansion on the Fortran subset of the SPECfp92 benchmarks without a significant increase in executable size or compilation time.
By: Paul R. Carini
Published in: RC20286 in 1995
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