[SM6.10] LinAlg Validation: Rebuild stage error tests with valid calls

[Ashley Coleman (V-FEXrt)]

This PR rebuilds the "stage error" DXIL tests that existed only to test if a LinAlg operation was allowed in a given shader stage.

These tests were written so early on that they violated pretty much every linalg validation rule causing them all to need to be updated for every single validation PR. Due to the nature of those updates at IR level they would constantly create unnecessary merge conflicts.

This PR does the following

• rebuilds the tests using the linalg.h header to avoid validation failures
• renames them from linalg-foo.ll to linalg-stage-foo.ll to make it a bit clearer what they test
• splits linalg-raytracing.ll into 6 linalg-foo.ll separate tests to it matches the one-stage-per-test pattern setup by all the other tests

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

This PR updates the DXIL validator coverage for LinAlgMatrix by replacing older per-stage IR tests with a set of new “stage-*” tests that exercise stage restrictions across more shader stages (including raytracing library stages), while keeping a compute-shader case that validates successfully.

Changes:

• Removed legacy LinAlgMatrix DXIL validation tests for VS/PS/CS/AS/Node.
• Added new LinAlgMatrix stage-focused validation tests for VS/PS/CS/AS/MS/Node and raytracing library stages (raygeneration/intersection).
• Updated expected diagnostics to include stage-related restrictions (e.g., TGSM usage outside compute).

Reviewed changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-vs.ll	Removed legacy VS validation test.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-ps.ll	Removed legacy PS validation test.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-cs.ll	Removed legacy CS validation test.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-as.ll	Removed legacy AS validation test.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-node.ll	Removed legacy Node validation test.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-stage-vs.ll	Added VS-stage validation expectations for LinAlgMatrix/TGSM restrictions.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-stage-ps.ll	Added PS-stage validation expectations for LinAlgMatrix/TGSM restrictions.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-stage-cs.ll	Added CS-stage “Validation succeeded” coverage for same opcode set.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-stage-as.ll	Added AS-stage validation expectations for LinAlgMatrix restrictions.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-stage-ms.ll	Added MS-stage validation expectations for LinAlgMatrix restrictions.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-stage-node.ll	Added Node-stage validation expectations for LinAlgMatrix restrictions.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-stage-raygeneration.ll	Added raygeneration (lib) validation expectations for LinAlgMatrix/TGSM restrictions.
tools/clang/test/LitDXILValidation/LinAlgMatrix/linalgmatrix-stage-intersection.ll	Added intersection (lib) validation expectations for LinAlgMatrix/TGSM restrictions.

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[Damyan Pepper (damyanp)]

LGTM - I've skimmed a few of these and figure that any other problems in them will be teased out as more validation is added.