[DT] Collapse MaterializeEncodingIntoPaddingPass into the generic pass.

[hanhanW]

This PR consolidates encoding materialization by merging the separate padding encoding pass into the main MaterializeDeviceEncodingPass. The changes eliminate the specialized MaterializeEncodingIntoPaddingPass and handle both data tiling and padding encoding resolution through a unified pass. The pass still prioritizes the pre-configured encoding resolver. If it is not present, it tries testing encoding resolver.

Key changes:

• Removed the separate MaterializeEncodingIntoPaddingPass and its associated addEncodingToPaddingPasses function.
• Extended MaterializeDeviceEncodingPass with a new test-gpu-encoding-resolver option that supports both gpu_data_tiling and gpu_padding resolver kinds for testing purpose.
• Updated test files to use the unified pass with appropriate resolver configuration.

Fixes #20160

[Copilot]

Pull Request Overview

This PR consolidates encoding materialization by merging the separate padding encoding pass into the main MaterializeDeviceEncodingPass. The changes eliminate the specialized MaterializeEncodingIntoPaddingPass and handle both data tiling and padding encoding resolution through a unified pass with configurable resolver types.

Key changes:

• Removed the separate MaterializeEncodingIntoPaddingPass and its associated addEncodingToPaddingPasses function
• Extended MaterializeDeviceEncodingPass with a new test-gpu-encoding-resolver option that supports both gpu_data_tiling and gpu_padding resolver kinds
• Updated test files to use the unified pass with appropriate resolver configuration

Reviewed Changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
Passes.cpp	Removed call to addEncodingToPaddingPasses from the pass pipeline
Passes.td	Replaced boolean test-cl-gpu-target option with enum-based test-gpu-encoding-resolver option supporting multiple resolver types
Passes.h	Removed declaration of addEncodingToPaddingPasses function
MaterializeEncodingIntoPadding.cpp	Deleted entire file containing the specialized padding pass
MaterializeEncoding.cpp	Refactored to handle both data tiling and padding resolvers based on the new enum option
EncodingUtils.h	Added TestingResolverKind enum defining resolver types for testing
materialize_encoding_*.mlir	Updated test RUN lines to use the unified pass with appropriate resolver configuration
CMakeLists.txt / BUILD.bazel	Removed MaterializeEncodingIntoPadding.cpp from build files

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[hanhanW]

I need to update few more comments and docs.