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[XlaCallModule] Add back support for version 4.
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In cl/574450204 we increased the minimum supported version to 5, because after March 23rd, 2023 only version 5 and higher were serialized.

Instead of rolling back all the changes, we only adjust the minimum supported version. This restores support, except for models that have shape polymorphism.

PiperOrigin-RevId: 575315983
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@gnecula @tensorflower-gardener
gnecula authored and tensorflower-gardener committed Oct 20, 2023
1 parent 0230b4d commit 2260565
Showing 1 changed file with 1 addition and 1 deletion.
2 changes: 1 addition & 1 deletion tensorflow/compiler/tf2xla/kernels/xla_call_module_loader.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -80,7 +80,7 @@ constexpr int kVersionStartSupportCallTFGraph = 5;
constexpr int kVersionStartSupportDisabledChecks = 6;
constexpr int kVersionStartSupportShapeAssertions = 7;
constexpr int kVersionStartSupportUsesShapePolymorphismAttr = 8;
constexpr int kVersionMinimumSupported = kVersionStartSupportCallTFGraph;
constexpr int kVersionMinimumSupported = kVersionStartStableHloCompatibility;

// This should match xla.py:call_module_maximum_supported_version
constexpr int kVersionMaximumSupported =
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