Changes for version 0.3413 - 2026-10-29
- Build: gcc 13 and 14 at -O3
- hist() gives finite midpoints again when built with gcc 13 or 14 at -O3, for data whose range is wider than the largest double. Two finite breaks whose sum overflows were found by testing the overflowed midpoint for Inf and then halving each break first; gcc's predictive commoning and jump threading together turned that test into an assumption that the next break was +Inf, so the following midpoint came back Inf. A Cygwin perl 5.44.0 smoker of 0.3412 (gcc 14.4.0, -O3) failed 6 subtests of t/hist.R.t this way, and gcc-13 and gcc-14 at -O3 reproduce all 6 here. The halved form is now chosen from the breaks' own magnitudes, above NV_MAX / 2, where halving is exact, so the result equals R's wherever R's is finite.
- The other overflow tests of the same shape no longer give gcc anything to reason back from: median()'s halved pair, now chosen from the pair's magnitudes as hist()'s is, and the finiteness tests on to - from in seq(), on the range in pretty() and its break fill, and on a + b in the incomplete beta, each of which falls back on its operands. Those four test the difference through a volatile, as pretty()'s nu loop has since 0.3412. None of them miscompiles under gcc 13 or 14 at -O3 here, but each has the shape that did, and the next gcc need not spare them.
Modules
Get basic statistical functions, like in R, but with Perl using XS for performance