trunk/625add37a1fc87a8b732163ef18ae3594d8b6909: Fix Inductor embedding negative indices (#184107)

Inductor should preserve torch.embedding's no-negative-wrap semantics. Teach embedding lowering to assert negative rows and make dense backward mask invalid rows before count/scale/scatter instead of wrapping them. The masked decomposition also covers out-of-range backward indices that previously crashed the checked index_put fallback.

Fixes

Generated by my agent

Pull Request resolved: