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compiler: Cache modulodimensions in abridge_dim_names rather than repeatedly searching IET #3052

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compiler: Cache modulodimensions in abridge_dim_names rather than repeatedly searching IET #3052

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13 changes: 10 additions & 3 deletions devito/passes/iet/misc.py
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Original file line number Diff line number Diff line change
Expand Up @@ -347,6 +347,7 @@ def _(iet):
def _(iet):
# SubDimensions in the main loop nests
mapper = {}
mds = {}
# Build a mapper replacing SubDimension names with respective root dimension
# names where possible
for tree in retrieve_iteration_tree(iet):
Expand All @@ -358,9 +359,15 @@ def _(iet):
dims = [d for d in dims if d.is_Incr and d.parent in mapper]
mapper.update({d: d._rebuild(parent=mapper[d.parent]) for d in dims})

# Update parents of CIRE-generated ModuloDimensions
dims = FindSymbols('dimensions').visit(tree)
dims = [d for d in dims if d.is_Modulo and d.parent in mapper]
# Update parents of CIRE-generated ModuloDimensions. Search once per
# outermost Iteration, as each tree would otherwise rescan the outer loops
try:
candidates = mds[tree.root]
except KeyError:
candidates = mds[tree.root] = [
d for d in FindSymbols('dimensions').visit(tree.root) if d.is_Modulo
]
dims = [d for d in candidates if d.parent in mapper]
mapper.update({d: d._rebuild(parent=mapper[d.parent]) for d in dims})

return Uxreplace(mapper, nested=True).visit(iet)
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