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Ivan00's avatar
Ivan00
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4 years ago

Bug report: synthesis optimizes out the signal if data type is declared in generic package

When the data type is declared in the generic package, the synthesis tool removes the signal completely when array slice is used on the right side of the assignment. I have condensed it to the follow...
Ivan00's avatar
Ivan00
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4 years ago

Hi Ean,

yes, that would work. If you dont use test_type_t in the o_bug signal, then o_bug is generated properly.

The wrong behaviour shows only when a data type from the generic package is used. This is the subject of this thread:

"Bug report: synthesis optimizes out the signal if data type is declared in generic package"

Can i assume that you have reproduced the bug and there will be a fix in a future version of Quartus ?

Best regards,

Ivan

YEan's avatar
YEan
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4 years ago

Hi Ivan,

The solution I provided is to connect the o_bug to i that you request for. Because I don't have the complete design so I can't said that I reproduced the bug. It was coding issues so it will not be fix in future version of Quartus. As I mentioned before, if the bus length(size) of input and output were different the Quartus will show error messages. You may consider to change the architecture in your design.

Thanks,

Ean