inducer/loopy

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A code generator for array-based code on CPUs and GPUs

Stars: 636
Forks: 81
Open beginner issues: 0
Indexed issues: 140
Avg merge: 1d 19h
Merged PRs (30d): 7

Dominant language: Python
License: MIT
Last GitHub push: Sep 11, 2026
Latest indexed: Sep 15, 2026
Contributing guide: No contributing guide
Code of conduct: No code of conduct
Beginner labels: No beginner labels indexed

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140 open issues indexed

float64 ^ int?! Open

inducer/loopy#2 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Flop counting of FMA Open

inducer/loopy#3 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Store counting vs vectorization Open

inducer/loopy#12 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Should vectorize x = 4 if x is a vector Open

inducer/loopy#15 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
split_array_axis does not propagate nesting levels Open

inducer/loopy#23 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Device mapping takes a very long time Open

inducer/loopy#35 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Fix reduction examples Open

inducer/loopy#63 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
What is Loopy's function namespace? (was: Is min a reduction or a 2-arg minimum like OpenCL) Open

inducer/loopy#73 · 10 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ILP not applied to variable loop length Open

inducer/loopy#77 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
ILP vs loop ordering Open

inducer/loopy#82 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Support calling kernel for CTarget Open

inducer/loopy#83 · 10 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Make a "proper" way to force the grid size Open

inducer/loopy#84 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
implemented_data_info.base_name incomplete for domain parameters Open

inducer/loopy#99 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Apply isl.BasicMap to loop domain Open

inducer/loopy#100 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Data-dependent array sizes Open

design discussion enhancement

inducer/loopy#106 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
precompute() calls in test_tim2d lead to unused inames Open

inducer/loopy#109 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Macro hygiene and reductions Open

design

inducer/loopy#110 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Change existing _lpy_ name prefixes to conform to new naming rules Open

inducer/loopy#112 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
test_scan_with_outer_parallel_iname (intermittently?) fails on master Open

inducer/loopy#114 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Make a (global?) I-care-about-performance flag Open

inducer/loopy#115 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Millisecond loopy Open

inducer/loopy#117 · 17 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Addition of a NumbaCTarget Open

inducer/loopy#118 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
How should domain trees be deduced/specified? Open

inducer/loopy#127 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Unexpected subtraction result for int64 - uint32 Open

inducer/loopy#131 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
"Packing controller" should not execute pack/unpack Open

inducer/loopy#134 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Better argument type checking Open

inducer/loopy#137 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Codegen slow due to excessive islpy calls Open

inducer/loopy#148 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Custom stencil operations Open

inducer/loopy#153 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Ensure ValueArgs used in isl expressions are not written Open

inducer/loopy#164 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Temporary Array Arg is apparently accessed out of bounds Open

inducer/loopy#177 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Scheduling stage is slow for many-instruction kernel with disjoint loop nests Open

inducer/loopy#178 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Type inference: Discussion: error on unsized float? Open

inducer/loopy#190 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Cannot guess shapes with kernel parameters in them Open

inducer/loopy#198 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
While loops in IR Open

inducer/loopy#203 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Windows support? Open

inducer/loopy#205 · 7 comments · 1 reaction · 0 assignees · Indexed Sep 15, 2026
Code generation with fully unrolled loops gets extremely slow Open

inducer/loopy#207 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Iname tag parsing should use generic functionality in pytools.tag Open

inducer/loopy#219 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Missing barrier on stencil code after parallelizing Open

inducer/loopy#221 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Allow ternaries in array shape expressions Open

inducer/loopy#232 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Flaky CI] Segmentation fault in examples/python/vector-types.py Open

inducer/loopy#240 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Executable CTarget does not support scalar GlobalArgs Open

inducer/loopy#243 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Loopy is slow in make_kernel, preprocess_kernel and codegen Open

inducer/loopy#247 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Deprecate string tags for statements, variables Open

inducer/loopy#250 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Strip user metadata before codegen passes Open

inducer/loopy#257 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Enhancement] Make type_context used in target/*.py an enum.Enum Open

inducer/loopy#260 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Array axes should allow free-form tags Open

inducer/loopy#265 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[PyOpenCL execution]: Scalar argument always returned as pyopencl arrays Open

inducer/loopy#269 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
Missing join_array_axes transformation Open

inducer/loopy#277 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
[Enhancement]: Parallelizing a very long kernel is slow Open

inducer/loopy#288 · 7 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026
What to do about separate "loop entry roots" sharing a domain Open

inducer/loopy#379 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 15, 2026

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