michaelmaitland wrote:

Adding a data point here: changing the small data limit to 0 is causing 
significant regressions on dhrystone, spec2006, spec2017, and geekbench5 on the 
sifive-x280 and sifive-p470.

Separate from this data point, a default of 8 bytes may be justified because 
most scalar primitives are 8 bytes or smaller on most architectures (boolean, 
char, int, unsigned, long, float, double, half). Data larger than this is 
likely something like arrays or structs.

https://github.com/llvm/llvm-project/pull/83093
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