Fuzz preserve nuw sub

[dtcxzyw]

llvm/llvm-project@main...dtcxzyw:perf/preserve-nuw-sub-trunc

[github-actions]

Seeds: 5
Pass: opt -passes=instcombine<no-verify-fixpoint>
Baseline: llvm/llvm-project@4554cdf
Patch URL: llvm/llvm-project@main...dtcxzyw:perf/preserve-nuw-sub-trunc
Patch SHA256: 3940f399c1aaa9df157f93abf00b0e56b2ab7a45221c664e715e9795069b7cf2
Checklist:
✅ Correctness
✅ Commutative op handling
✅ Multi-use handling
❌ Flag preservation
✅ Canonical form handling
Time: 00:02:46
Artifact: https://github.com/dtcxzyw/llvm-mutation-based-fuzz-service/actions/runs/17881262880/artifacts/4063133149

[github-actions]

Seeds: 5
Pass: opt -passes=instcombine<no-verify-fixpoint>
Baseline: llvm/llvm-project@4554cdf
Patch URL: llvm/llvm-project@main...dtcxzyw:perf/preserve-nuw-sub-trunc
Patch SHA256: b7bf93c37b6a54d9155a953ae9c21ecfa1b98c3b8616d5addf0a130c6c9e0f13
Checklist:
✅ Correctness
✅ Commutative op handling
✅ Multi-use handling
❌ Flag preservation
✅ Canonical form handling
Time: 00:02:54
Artifact: https://github.com/dtcxzyw/llvm-mutation-based-fuzz-service/actions/runs/17881506336/artifacts/4063188970