Tweak logic for SPIRV max ID bounds #9103
Open
+25
−6
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Fixes #9086
Increase the initial max ID to a much larger value. In optimization modes where the CompactID pass isn't already run, manually apply that pass if the ID bound of the final SPIRV is higher than kDefaultMaxIdBound.
This gives the optimizer more room to maneuver,
and in low-optimization cases helps avoids invalid SPIRV if the optimization result ended up with IDs beyond kDefaultMaxIdBound.