( ESNUG 333 Item 5 ) --------------------------------------------- [10/20/99]
Subject: ( ESNUG 321 #9 ) Maybe This Variable Removes Dead Flip-flops?
> Design Compiler never removes storage elements. I've tried connecting
> set, reset, clock, or data to force FFs or latches to constant values,
> and DC always kept them in the design.
>
> - William Liao
> MMC Networks
From: dbudell@us.ibm.com ( Della J. Budell )
John,
Way back in ESNUG 321 ( OK, so I'm a little behind in reading ESNUGs ),
there was a discussion about Synopsys not removing unloaded latches. Just
recently I found out there is a variable called
compile_delete_unloaded_sequential_cells
which in our setup seems to default to "true." Now, this variable may not
apply in the case being discussed, but I thought I'd throw it out there.
- Della J. Budell
IBM Corp. Essex Junction, VT
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