verilator

Commit Graph

Author	SHA1	Message	Date
Geza Lore	c6b0918db5	Improve Dfg variable removal and temporary insertion (#6401 ) Combined Dfg variable elimination into the regularization pass that runs before converting back to Ast. This avoids introducing some unnecessary temporaries. Added replacing of variables with constants in the Ast if after the Dfg passes they are known to be constants. This is only done in final scoped Dfg application. Avoid introducing temporaries for common sub-expressions that are cheaper to re-compute than store in a temporary variable. Enable removal of redundant unpacked array variables. Also fixes #6394 as this patch involved changes to that code.	2025-09-10 12:38:49 +01:00
Geza Lore	cbc76a7816	Dump DFG patterns with --stats (#4889 ) With --stats, we will print DFG pattern combinations, one per line, as S-expressions to new stat files, together with their frequency, to aid discovery of new peephole patterns.	2024-02-11 15:41:10 +00:00

Author

SHA1

Message

Date

Geza Lore

c6b0918db5

Improve Dfg variable removal and temporary insertion (#6401 )

Combined Dfg variable elimination into the regularization pass that runs
before converting back to Ast. This avoids introducing some unnecessary
temporaries.

Added replacing of variables with constants in the Ast if after the
Dfg passes they are known to be constants. This is only done in final
scoped Dfg application.

Avoid introducing temporaries for common sub-expressions that are
cheaper to re-compute than store in a temporary variable.

Enable removal of redundant unpacked array variables.

Also fixes #6394 as this patch involved changes to that code.

2025-09-10 12:38:49 +01:00

Geza Lore

cbc76a7816

Dump DFG patterns with --stats (#4889 )

With --stats, we will print DFG pattern combinations, one per line, as
S-expressions to new stat files, together with their frequency, to aid
discovery of new peephole patterns.

2024-02-11 15:41:10 +00:00

2 Commits