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Fix static shape propagation in aten.as_strided #4334

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Fix static shape propagation in aten.as_strided #4334

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b68730d
set viewShapeInts[dim] = size; in DecomposeComplexOps
raayandhar Oct 7, 2025
d83ae9a
add a test for aten.as_strided in decompose-complex-ops
raayandhar Oct 7, 2025
95d4bbf
remove unflatten tests
raayandhar Oct 7, 2025
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3 changes: 1 addition & 2 deletions lib/Dialect/Torch/Transforms/DecomposeComplexOps.cpp
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Expand Up @@ -12855,8 +12855,7 @@ class DecomposeAtenAsStridedOp : public OpRewritePattern<AtenAsStridedOp> {
Value index = rewriter.create<Torch::AtenArangeOp>(
loc, arangeType, end, cstNone, cstNone, cstNone, cstNone);

// Set the current dimension to -1 for broadcasting
viewShapeInts[dim] = -1;
viewShapeInts[dim] = size;
viewShapeListElems[dim] = cstMinusOne;

Value viewShapeList = rewriter.create<Torch::PrimListConstructOp>(
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16 changes: 16 additions & 0 deletions test/Dialect/Torch/decompose-complex-ops.mlir
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Expand Up @@ -934,3 +934,19 @@ func.func @channel_shuffle(%arg0: !torch.vtensor<[1,8,4,4],f32>) -> !torch.vtens
%0 = torch.aten.channel_shuffle %arg0, %int4 : !torch.vtensor<[1,8,4,4],f32>, !torch.int -> !torch.vtensor<[1,8,4,4],f32>
return %0 : !torch.vtensor<[1,8,4,4],f32>
}

// -----

// CHECK-LABEL: func.func @torch.aten.as_strided$static_shapes
func.func @torch.aten.as_strided$static_shapes(%arg0: !torch.vtensor<[4,8],f32>) -> !torch.vtensor<[2,3],f32> {
%int0 = torch.constant.int 0
%int2 = torch.constant.int 2
%int3 = torch.constant.int 3
%int1 = torch.constant.int 1
%size = torch.prim.ListConstruct %int2, %int3 : (!torch.int, !torch.int) -> !torch.list<int>
%stride = torch.prim.ListConstruct %int1, %int1 : (!torch.int, !torch.int) -> !torch.list<int>
// CHECK: torch.aten.view {{.*}} -> !torch.vtensor<[2,1],si64>
// CHECK: torch.aten.view {{.*}} -> !torch.vtensor<[1,3],si64>
%0 = torch.aten.as_strided %arg0, %size, %stride, %int0 : !torch.vtensor<[4,8],f32>, !torch.list<int>, !torch.list<int>, !torch.int -> !torch.vtensor<[2,3],f32>
return %0 : !torch.vtensor<[2,3],f32>
}
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