Dedupe all-axes boilerplate in ops.cpp with all_axes() helper - #4290
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Dedupe all-axes boilerplate in ops.cpp with all_axes() helper#4290Adityaj0 wants to merge 1 commit into
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Fourteen reduce/elementwise ops (flip, all, any, sum, count_nonzero, mean, median, var, std, prod, max, min, logsumexp, softmax) each repeated the same std::iota block to build a 0..ndim-1 axis list for their no-axes overload. Factor this into a single all_axes(ndim) helper alongside the existing compute_reduce_shape helper.
zcbenz
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Aug 16, 2026
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Can you rebase on latest main? |
zcbenz
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@Adityaj0 Can you rebase on latest main? |
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Rebased on latest main. GitHub won't let me reopen this PR since the branch was force-pushed after it closed, so continuing here: #4394 |
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Fourteen no-axes overloads (
flip,all,any,sum,count_nonzero,mean,median,var,std,prod,max,min,logsumexp,softmax) each repeated the samestd::iota-based boilerplate to build the "all axes" list before delegating to their axes-taking overload.Extracted a shared
all_axes(int ndim)helper into the existing anonymous namespace alongsidecompute_reduce_shape, and collapsed each call site to a one-liner. Net diff: 21 insertions / 42 deletions, single file (mlx/ops.cpp). Leftpad's default-axes logic and theargmin/argmaxkeepdims expansion untouched since they build a different range.Behavior-preserving — verified with the full C++ test suite (
ops_tests.cpp, notablytest flipandtest reduction ops): 263 test cases, 3578 assertions, all passing.pre-commit run(clang-format) also passed clean.Closes #4289 (originally filed against this repo by mistake, refiled at Adityaj0#1)