optimizer: don't insert :throw_undef_if_not for defined slots
#55600
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
As an application of #55545, this commit avoids the insertion of `:throw_undef_if_not` nodes when the defined-ness of a slot is guaranteed by abstract interpretation. ```julia julia> function isdefined_nothrow(c, x) local val if c val = x end if @isdefined val return val end return zero(Int) end; julia> @code_typed isdefined_nothrow(true, 42) ``` ```diff diff --git a/old b/new index c4980a5c9c..3d1d6d30f0 100644 --- a/old +++ b/new @@ -4,7 +4,6 @@ CodeInfo( 3 ┄ %3 = φ (#2 => x, #1 => #undef)::Int64 │ %4 = φ (#2 => true, #1 => false)::Bool └── goto #5 if not %4 -4 ─ $(Expr(:throw_undef_if_not, :val, :(%4)))::Any -└── return %3 +4 ─ return %3 5 ─ return 0 ) => Int64 ```
Keno
approved these changes
Aug 29, 2024
|
Yeah, it would probably simplify the IR more if we incorporate this information when creating the |
KristofferC
pushed a commit
that referenced
this pull request
Sep 12, 2024
As an application of #55545, this commit avoids the insertion of `:throw_undef_if_not` nodes when the defined-ness of a slot is guaranteed by abstract interpretation. ```julia julia> function isdefined_nothrow(c, x) local val if c val = x end if @isdefined val return val end return zero(Int) end; julia> @code_typed isdefined_nothrow(true, 42) ``` ```diff diff --git a/old b/new index c4980a5c9c..3d1d6d30f0 100644 --- a/old +++ b/new @@ -4,7 +4,6 @@ CodeInfo( 3 ┄ %3 = φ (#2 => x, #1 => #undef)::Int64 │ %4 = φ (#2 => true, #1 => false)::Bool └── goto #5 if not %4 -4 ─ $(Expr(:throw_undef_if_not, :val, :(%4)))::Any -└── return %3 +4 ─ return %3 5 ─ return 0 ) => Int64 ```
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
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.
As an application of #55545, this commit avoids the insertion of
:throw_undef_if_notnodes when the defined-ness of a slot is guaranteed by abstract interpretation.