Optimization for multiple memory-zeroing instructions #2174
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
What I did
Add an optimization for zeroing multiple memory slots at once.
Closes #2144
How I did it
When the LLL contains multiple sequential instructions to
MSTORE n 0
orCALLDATACOPY m CALLDATALSIZE n
, and the locations being zero'd within memory are sequential, merge these instructions into a single zeroing via calldatacopy.How to verify it
Run tests.
Cute Animal Picture