Fix: Add coverage-focused test suite and wrapper script to improve code coverage for hipblaslt

[pdhirajkumarprasad]

This commit adds infrastructure to measure and improve code coverage:

Motivation

We are trying to improve the code coverage for hipblaslt to >80% from current ~50%. This PR is in that direction.

Technical Details

1. New test file: coverage_focused_gtest.yaml (69 test definitions)

   • Grouped GEMM operations with various configurations
   • Data type conversion tests (mixed precision f16/bf16/f32)
   • Transpose combinations (NN, NT, TN, TT)
   • Scaling modes (scalar, block, mixed)
   • Batch and stride operations
   • Epilogue tests (activation functions, bias handling)
   • Custom type tests (bf6, f6, f4) - experimental

2. Coverage wrapper script: cmake/run_coverage_tests.sh

   • Sets HIPBLASLT_LOG_MASK=255 to enable all logging paths
   • Sets HIPBLASLT_CHECK_NUMERICS=1 (disabled due to memory issues)
   • Handles test failures gracefully for coverage report generation

3. Build integration:

   • Added coverage_focused_gtest.yaml to CMakeLists.txt dependencies
   • Included coverage_focused_gtest.yaml in hipblaslt_gtest.yaml
   • Updated coverage target to report test failures while still generating reports

4. Known bugs: Added 7 test cases to known_bugs.yaml for unsupported features

   • Mixed bias types, complex grouped GEMM, scaleCD/scaleAB vector modes

Expected outcome: Improve coverage from baseline to 65-70%+ by targeting high-value uncovered code in tensile_host.cpp, rocblaslt_mat_utils.hpp, and other core library files.

Post this PR

TOTAL                                                                                                                                                              5977              2352    60.65%         882               439    50.23%       14264
     5289    62.92%        4606              2019    56.17%

Before this change:

TOTAL                                                                          5695              2646    53.54%         838               449    46.42%       14151              6510    54.00%        4455              2361    47.00%

This PR can be merged after #8470 is merged

Test Plan

N/A

Test Result

N/A

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

[pdhirajkumarprasad]

Overall summary:

Commit 1 (b010bb60c0) - 

  "Add coverage-focused test suite and wrapper script"
  - ✅ Added 69 YAML test definitions (1,519 lines)
  - ✅ Created coverage wrapper script (46 lines)
  - ✅ Added 7 known bug entries
  - ✅ Build integration for test execution
  - Goal: Improve coverage from baseline to 65-70%

  Commit 2 (a9c256f228) - 

  "added exclusion logic for inline/constexpr code"
  - ✅ Excluded 10 files (1,450 unmeasurable lines)
  - ✅ Added 16 more YAML tests (389 lines)
  - ✅ Created 2 new C++ test files (437 lines total)
  - ✅ Added 52 more known bug entries
  - ✅ Fixed critical bug: Added include: known_bugs.yaml to coverage_focused_gtest.yaml
  - Result: Coverage 70.71% 
  

[therock-pr-bot]

❌ PR Check — Action Required

Check	Status	Details
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📝 PR Title/Description	❌ Fail	Error: Title is too long (95 characters). Expected: at most 80 characters. Desired format: type(optional-scope): short description ─── Error: Title does not follow Conventional Commits style. Expected: start with a valid type (feat, fix, docs, …). Desired format: type(optional-scope): short description ─── Error: PR description must reference a JIRA ID, ISSUE ID, or a GitHub closing keyword. Expected: include a JIRA ID / ISSUE ID line (separator : or -, or omitted; value may be a JIRA key, a number with/without #, or a link), OR a closing keyword + issue reference. Accepted examples: • JIRA ID : TESTAUTO-6039 • JIRA ID - #330 • JIRA ID #330 • ISSUE ID : TESTUTO-3334 • ISSUE ID #3334 • ISSUE ID - TESTAUTO-3433 • ISSUE ID : https://github.com/<org_name>/<repo_name>/issues/1234 • Closes #10 • Fixes octo-org/octo-repo#100 • Resolves: #123 • #123 • https://github.com/<org_name>/<repo_name>/issues/123 Current: no valid JIRA/ISSUE/closing-keyword reference found
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🔎 pre-commit	✅ Pass	—
🚫 Draft PR	🔜 To Be Enabled	—
🚩 Feature Flag	🔜 To Be Enabled	—
📊 Code Coverage	🔜 To Be Enabled	—

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