I have a 32 bit hello world working, and thinking about making it part of the regressions reminded me of when I was doing something similar for SPARC. Back then I didn't find a good way for 32 bit and 64 bit benchmarks/binaries to exist in the regression system at the same time since they're always expected to be in the same directory with the same name. It would be nice to be able to also have, for instance, 32 bit versions of hello world compiled with and without optimizations. I've found the optimized binaries are non trivially harder to run correctly, but they may not cover all the same cases as the unoptimized ones. If we're doing some sort of fancy regressions overhaul in the future, it would be nice if this sort of thing could be accommodated better.
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