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<p>This paper describes a compiler-based approach to providing multiple instruction rollback capability for general purpose processor registers. The objective is achieved by having the compiler remove all forms of <math><tmath>N</tmath></math>-instruction antidependencies. Pseudoregister antidependencies are removed by loop protection, node splitting, and loop expansion techniques; machine register antidependencies are prevented by introducing antidependency constraints in the interference graph used by the register allocator. To support separate compilation, inter-procedural antidependency constraints are added to the code generator to guarantee the termination of machine register antidependencies across procedure boundaries. The algorithms have been implemented in the IMPACT C compiler. Experiments illustrating the effectiveness of this approach are described.</p>
rollback recovery, fault-tolerant computing, instruction retry, compilers
W. Kent Fuchs, Shyh-Kwei Chen, Chung-Chi Jim Li, Wen-Mei W. Hwu, "Compiler-Based Multiple Instruction Retry", IEEE Transactions on Computers, vol. 44, no. , pp. 35-46, January 1995, doi:10.1109/12.368011
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