Nvunnam/combined pr801 803 804#805
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Mirrors the IPU-specific 1x1-input optimisation in xcompiler's
ReplaceQDQResizePass (src/pass/passes/ReplaceQDQResizePass.cpp lines
200-282). When a quantised XFEResize takes a tensor of shape
[N, 1, 1, C] and upsamples it to [N, H, W, C] (NHWC, with H>1 or W>1),
the Resize is functionally a broadcast: there is only one source
pixel per (N, C) so bilinear/nearest collapse to replication.
The rewrite drops the Resize and emits
%zero = onnx.Constant of shape [N, H, W, C] in the output quant type,
storage value = output_zero_point (decodes to 0.0)
%out = onnx.Add(%resize_input, %zero)
ONNX Add broadcasts [N, 1, 1, C] + [N, H, W, C] -> [N, H, W, C],
producing the same numerical result as the original Resize. The
synthetic zero Add is then collapsed by downstream eltwise / const-fold
passes (xcompiler's pipeline does the same: ReplaceQDQResizePass tags
the eltwise with original_resize_opt=true, and a later fusion absorbs
the zero into a downstream skip-connection Add).
Match conditions:
* single-use XFEResize
* rank-4 static input AND output (NHWC)
* input_shape[1] == 1 && input_shape[2] == 1
* output_shape[1] > 1 || output_shape[2] > 1
* batch and channel dims match across input/output
* input and output are uniform quant types with matching scale/zp
This avoids the backend qlinear_resize kernel for the corner-case
1x1->HxW shape that often fails or runs sub-optimally on IPU; observed
on scene_parser_512_256_v2_int8 (Resize_173_8), PSO3, PSA2, PSA3 and
mep_v2/K2.
Placement: after ConvertToChannelLast (creates XFEResize), after the
5D->4D and transpose-optimisation passes (stable rank-4 NHWC), and
right before ReplaceQuantizedTileToAddPass (its analogue for Tile) so
the emitted onnx.Add is immediately lowered by ReplaceQDQEltwisePass.
Co-authored-by: Cursor <cursoragent@cursor.com>
Apply repo .clang-format (LLVM + AlwaysBreakTemplateDeclarations: Yes + AlignAfterOpenBracket: DontAlign) to ReplaceQDQResizePass.cpp. Whitespace-only fix for the 4 violations reported by clang-format 20.0.0git on the previous commit (struct header break, two notifyMatchFailure continuation breaks, and the rewriter.create<ONNXConstantOp> continuation). Co-authored-by: Cursor <cursoragent@cursor.com>
…ot/Erf/Mod, normalize Softmax axis to last, disable Where
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