Arm64Emitter: Don't optimize ADD to MOV for SP #12566
Merged
+8
−2
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Outdated suggestions cannot be applied.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.
Unlike ADD (immediate), MOV (register) treats SP as ZR. Therefore the ADDI2R optimization that was added in 67791d2 can't optimize ADD to MOV when exactly one of the registers is SP.
There currently isn't any code in Dolphin that calls ADDI2R with parameters that would trigger this case.