Skip to content

[SIL.rst] Add textual examples for some of the pack instructions. #71221

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Jan 30, 2024
Merged

[SIL.rst] Add textual examples for some of the pack instructions. #71221

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 6 additions & 0 deletions docs/SIL.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -7454,6 +7454,8 @@ scalar_pack_index

sil-instruction ::= 'scalar_pack_index' int-literal 'of' sil-type

%index = scalar_pack_index 0 of $Pack{Int, repeat each T, Int}

Produce the dynamic pack index of a scalar (non-pack-expansion)
component of a pack. The type operand is the indexed pack type. The
integer operand is an index into the components of this pack type; it
Expand Down Expand Up @@ -7573,6 +7575,8 @@ pack_element_get

sil-instruction ::= 'pack_element_get' sil-value 'of' sil-operand 'as' sil-type

%addr = pack_element_get %index of %pack : $*Pack{Int, repeat each T} as $*Int

Extracts the value previously stored in a pack at a particular index.
If the pack element is uninitialized, this has undefined behavior.

Expand All @@ -7591,6 +7595,8 @@ pack_element_set

sil-instruction ::= 'pack_element_set' sil-operand 'into' sil-value 'of' sil-operand

pack_element_set %addr : $*@pack_element("...") each U into %index of %pack : $*Pack{Int, repeat each T}

Places a value in a pack at a particular index.

Ownership is unclear for direct packs.
Expand Down