Rewrite scalar dot as multiplication #1205

[SwarnimShekhar]

Description

• Optimized local_blockwise_dot_to_mul to handle (1,1) @ (1,1) cases as direct elementwise multiplication.
• Prevents unnecessary reshaping for scalar-like tensors.
• Ensures consistency with other elementwise multiplication cases.

Related Issue

• Closes #
• Related to #

Checklist

• Checked that the pre-commit linting/style checks pass
• Included tests that prove the fix is effective or that the new feature works
• Added necessary documentation (docstrings and/or example notebooks)
• If you are a pro: each commit corresponds to a relevant logical change

Type of change

• New feature / enhancement
• Bug fix
• Documentation
• Maintenance
• Other (please specify):

---

📚 Documentation preview 📚: https://pytensor--1263.org.readthedocs.build/en/1263/

[ricardoV94]

This was already handled, the issue that was not handled was for the care dot (not the blockwised versions) that this rewrite tracks.

Also a.ndim is redundant if you are checking the shape explicitly. More important you have to use static shape a.type.shape not the symbolic shape a.shape, as is done in the rest of this function

[SwarnimShekhar]

I will look into that again!