Download e-book for kindle: Compiler Construction: 19th International Conference, CC by Rajiv Gupta

By Rajiv Gupta

This publication constitutes the refereed complaints of the nineteenth overseas convention on Compiler building, CC 2010, held in Paphos, Cyprus, in March 2010, as a part of ETAPS 2010, the Joint ecu meetings on idea and perform of software program. Following an intensive evaluation method, sixteen examine papers have been chosen from fifty six submissions. themes coated comprise optimization suggestions, software ameliorations, application research, sign up allocation, and high-performance platforms.

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Additional info for Compiler Construction: 19th International Conference, CC 2010, Held as Part of the Joint European Conferences on Theory and Practice of Software, ETAPS 2010, Paphos, Cyprus, March 2010, Proceedings

Example text

The compiler team is currently re-examining the loop unrolling strategy to take into account the penalty for branch misses. Experienced compiler developers will understand the value of the observations above to provide direction to a compiler development team. These observations focus on the z/architecture R , the Testarossa compiler, and are based on mining data from the SPECjvm2008 benchmark suite. A similar approach can be used to most combinations of compiler/architecture/application. Moreover, the mining tool can be used to discover opportunities that might be specific to important applications.

Ding and S. Onder 38 contains instruction J. Assume a trivial instruction K is inserted in e1 as shown in Figure 9(b). The predicate expression controlling K, namely γ is the same as the one controlling e1. γ is computed by propagating instruction K to B1. For that purpose, K is first moved into block B3. K becomes β : K in B3 where three cases may happen: case1: β = P if e1 is the taken edge of B3, case2: β = ¬P if e1 is the fall through edge of B3, case3: β = true which means K is not guarded by any predicate if B3 is ended with an unconditional jump.

6. Instruction propagation Let us now see through an example how the instruction merging effectively eliminates unnecessary code duplication. Consider the CFG fragment shown in Figure 6(a). Suppose that instruction I needs to be moved to block B1. Further note that instruction I is control independent of the block B1. We first insert the branch condition P = a < b in block B1. Moving of I is accomplished by applying the splitting transformation, followed by progression of I1 and I2 into blocks B2 and B3 respectively and the deletion of temporary nodes inserted during the movement (Figure 6(b)).

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