[v640][RF] Backport of chi-square and RooONNXFunc fixes, update xRooFit for the release#22102
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guitargeek merged 3 commits intoroot-project:v6-40-00-patchesfrom Apr 29, 2026
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The `createChi2()` / `chi2FitTo()` so far always went through the legacy `RooChi2Var`. This commit wires them up to the same evaluation pipeline that `createNLL()` uses, so all of Cpu, Cuda, Codegen and CodegenNoGrad backend now work for chi-squared fits. (cherry picked from commit f6bb68f)
This resyncs the xRooFit external developments with those in ROOT (cherry picked from commit c695dfb)
* copying `_funcName` was forgotten
* `d_inputFlt` should start from zero so the derivatives get correctly
accumulated (noticed when running benchmarks and tests)
(cherry picked from commit 498c038)
Test Results 22 files 22 suites 3d 12h 32m 57s ⏱️ Results for commit 1ba3269. |
guitargeek
merged commit 0177de2
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Backport recent RooFit commits to the release branch.