irinterp: Move irinterp va processing #54076
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Currently we perform the va transform inside the innermost construct of IRInterpretationState. However, I think it makes more sense to lift this processing one level, so that the `argtypes` for the constructor that takes `ir` matches `ir.argtypes`, while the one for the constructor that takes `mi` is the full expanded out argtypes. NFC for base, but the `ir` constructor is used in downstream external absints. However, I think this way around is better for them also, since it's not always clear what format the argtypes they have are in and the va direction is easy and well supported, so it's better to have the option.
aviatesk
approved these changes
Apr 14, 2024
Keno
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May 3, 2024
This changes the canonical source of truth for va handling from `Method` to `CodeInfo`. There are multiple goals for this change: 1. This addresses a longstanding complaint about the way that CodeInfo-returning generated functions work. Previously, the va-ness or not of the returned CodeInfo always had to match that of the generator. For Cassette-like transforms that generally have one big generator function that is varargs (while then looking up lowered code that is not varargs), this could become quite annoying. It's possible to workaround, but there is really no good reason to tie the two together. As we observed when we implemented OpaqueClosures, the vararg-ness of the signature and the `vararg arguments`->`tuple` transformation are mostly independent concepts. With this PR, generated functions can return CodeInfos with whatever combination of nargs/isva is convenient. 2. This change requires clarifying where the va processing boundary is in inference. #54076 was already moving in that direction for irinterp, and this essentially does much of the same for regular inference. As a consequence the constprop cache is now using non-va-cooked signatures, which I think is preferable. 3. This further decouples codegen from the presence of a `Method` (which is already not assumed, since the code being generated could be a toplevel thunk, but some codegen features are only available to things that come from Methods). There are a number of upcoming features that will require codegen of things that are not quite method specializations (See design doc linked in #52797 and things like #50641). This helps pave the road for that. 4. I've previously considered expanding the kinds of vararg signatures that can be described (see e.g. #53851), which also requires a decoupling of the signature and ast notions of vararg. This again lays the groundwork for that, although I have no immediate plans to implement this change. Impact wise, this adds an internal field, which is not too breaking, but downstream clients vary in how they construct their `CodeInfo`s and the current way they're doing it will likely be incorrect after this change, so they will require a small two-line adjustment. We should perhaps consider pulling out some of the more common patterns into a more stable package, since interface in most of the last few releases, but that's a separate issue.
Keno
added a commit
that referenced
this pull request
May 3, 2024
This changes the canonical source of truth for va handling from `Method` to `CodeInfo`. There are multiple goals for this change: 1. This addresses a longstanding complaint about the way that CodeInfo-returning generated functions work. Previously, the va-ness or not of the returned CodeInfo always had to match that of the generator. For Cassette-like transforms that generally have one big generator function that is varargs (while then looking up lowered code that is not varargs), this could become quite annoying. It's possible to workaround, but there is really no good reason to tie the two together. As we observed when we implemented OpaqueClosures, the vararg-ness of the signature and the `vararg arguments`->`tuple` transformation are mostly independent concepts. With this PR, generated functions can return CodeInfos with whatever combination of nargs/isva is convenient. 2. This change requires clarifying where the va processing boundary is in inference. #54076 was already moving in that direction for irinterp, and this essentially does much of the same for regular inference. As a consequence the constprop cache is now using non-va-cooked signatures, which I think is preferable. 3. This further decouples codegen from the presence of a `Method` (which is already not assumed, since the code being generated could be a toplevel thunk, but some codegen features are only available to things that come from Methods). There are a number of upcoming features that will require codegen of things that are not quite method specializations (See design doc linked in #52797 and things like #50641). This helps pave the road for that. 4. I've previously considered expanding the kinds of vararg signatures that can be described (see e.g. #53851), which also requires a decoupling of the signature and ast notions of vararg. This again lays the groundwork for that, although I have no immediate plans to implement this change. Impact wise, this adds an internal field, which is not too breaking, but downstream clients vary in how they construct their `CodeInfo`s and the current way they're doing it will likely be incorrect after this change, so they will require a small two-line adjustment. We should perhaps consider pulling out some of the more common patterns into a more stable package, since interface in most of the last few releases, but that's a separate issue.
Keno
added a commit
that referenced
this pull request
May 5, 2024
This changes the canonical source of truth for va handling from `Method` to `CodeInfo`. There are multiple goals for this change: 1. This addresses a longstanding complaint about the way that CodeInfo-returning generated functions work. Previously, the va-ness or not of the returned CodeInfo always had to match that of the generator. For Cassette-like transforms that generally have one big generator function that is varargs (while then looking up lowered code that is not varargs), this could become quite annoying. It's possible to workaround, but there is really no good reason to tie the two together. As we observed when we implemented OpaqueClosures, the vararg-ness of the signature and the `vararg arguments`->`tuple` transformation are mostly independent concepts. With this PR, generated functions can return CodeInfos with whatever combination of nargs/isva is convenient. 2. This change requires clarifying where the va processing boundary is in inference. #54076 was already moving in that direction for irinterp, and this essentially does much of the same for regular inference. As a consequence the constprop cache is now using non-va-cooked signatures, which I think is preferable. 3. This further decouples codegen from the presence of a `Method` (which is already not assumed, since the code being generated could be a toplevel thunk, but some codegen features are only available to things that come from Methods). There are a number of upcoming features that will require codegen of things that are not quite method specializations (See design doc linked in #52797 and things like #50641). This helps pave the road for that. 4. I've previously considered expanding the kinds of vararg signatures that can be described (see e.g. #53851), which also requires a decoupling of the signature and ast notions of vararg. This again lays the groundwork for that, although I have no immediate plans to implement this change. Impact wise, this adds an internal field, which is not too breaking, but downstream clients vary in how they construct their `CodeInfo`s and the current way they're doing it will likely be incorrect after this change, so they will require a small two-line adjustment. We should perhaps consider pulling out some of the more common patterns into a more stable package, since interface in most of the last few releases, but that's a separate issue.
Keno
added a commit
that referenced
this pull request
May 5, 2024
This changes the canonical source of truth for va handling from `Method` to `CodeInfo`. There are multiple goals for this change: 1. This addresses a longstanding complaint about the way that CodeInfo-returning generated functions work. Previously, the va-ness or not of the returned CodeInfo always had to match that of the generator. For Cassette-like transforms that generally have one big generator function that is varargs (while then looking up lowered code that is not varargs), this could become quite annoying. It's possible to workaround, but there is really no good reason to tie the two together. As we observed when we implemented OpaqueClosures, the vararg-ness of the signature and the `vararg arguments`->`tuple` transformation are mostly independent concepts. With this PR, generated functions can return CodeInfos with whatever combination of nargs/isva is convenient. 2. This change requires clarifying where the va processing boundary is in inference. #54076 was already moving in that direction for irinterp, and this essentially does much of the same for regular inference. As a consequence the constprop cache is now using non-va-cooked signatures, which I think is preferable. 3. This further decouples codegen from the presence of a `Method` (which is already not assumed, since the code being generated could be a toplevel thunk, but some codegen features are only available to things that come from Methods). There are a number of upcoming features that will require codegen of things that are not quite method specializations (See design doc linked in #52797 and things like #50641). This helps pave the road for that. 4. I've previously considered expanding the kinds of vararg signatures that can be described (see e.g. #53851), which also requires a decoupling of the signature and ast notions of vararg. This again lays the groundwork for that, although I have no immediate plans to implement this change. Impact wise, this adds an internal field, which is not too breaking, but downstream clients vary in how they construct their `CodeInfo`s and the current way they're doing it will likely be incorrect after this change, so they will require a small two-line adjustment. We should perhaps consider pulling out some of the more common patterns into a more stable package, since interface in most of the last few releases, but that's a separate issue.
Keno
added a commit
that referenced
this pull request
May 6, 2024
This changes the canonical source of truth for va handling from `Method` to `CodeInfo`. There are multiple goals for this change: 1. This addresses a longstanding complaint about the way that CodeInfo-returning generated functions work. Previously, the va-ness or not of the returned CodeInfo always had to match that of the generator. For Cassette-like transforms that generally have one big generator function that is varargs (while then looking up lowered code that is not varargs), this could become quite annoying. It's possible to workaround, but there is really no good reason to tie the two together. As we observed when we implemented OpaqueClosures, the vararg-ness of the signature and the `vararg arguments`->`tuple` transformation are mostly independent concepts. With this PR, generated functions can return CodeInfos with whatever combination of nargs/isva is convenient. 2. This change requires clarifying where the va processing boundary is in inference. #54076 was already moving in that direction for irinterp, and this essentially does much of the same for regular inference. As a consequence the constprop cache is now using non-va-cooked signatures, which I think is preferable. 3. This further decouples codegen from the presence of a `Method` (which is already not assumed, since the code being generated could be a toplevel thunk, but some codegen features are only available to things that come from Methods). There are a number of upcoming features that will require codegen of things that are not quite method specializations (See design doc linked in #52797 and things like #50641). This helps pave the road for that. 4. I've previously considered expanding the kinds of vararg signatures that can be described (see e.g. #53851), which also requires a decoupling of the signature and ast notions of vararg. This again lays the groundwork for that, although I have no immediate plans to implement this change. Impact wise, this adds an internal field, which is not too breaking, but downstream clients vary in how they construct their `CodeInfo`s and the current way they're doing it will likely be incorrect after this change, so they will require a small two-line adjustment. We should perhaps consider pulling out some of the more common patterns into a more stable package, since interface in most of the last few releases, but that's a separate issue.
Keno
added a commit
that referenced
this pull request
May 7, 2024
This changes the canonical source of truth for va handling from `Method` to `CodeInfo`. There are multiple goals for this change: 1. This addresses a longstanding complaint about the way that CodeInfo-returning generated functions work. Previously, the va-ness or not of the returned CodeInfo always had to match that of the generator. For Cassette-like transforms that generally have one big generator function that is varargs (while then looking up lowered code that is not varargs), this could become quite annoying. It's possible to workaround, but there is really no good reason to tie the two together. As we observed when we implemented OpaqueClosures, the vararg-ness of the signature and the `vararg arguments`->`tuple` transformation are mostly independent concepts. With this PR, generated functions can return CodeInfos with whatever combination of nargs/isva is convenient. 2. This change requires clarifying where the va processing boundary is in inference. #54076 was already moving in that direction for irinterp, and this essentially does much of the same for regular inference. As a consequence the constprop cache is now using non-va-cooked signatures, which I think is preferable. 3. This further decouples codegen from the presence of a `Method` (which is already not assumed, since the code being generated could be a toplevel thunk, but some codegen features are only available to things that come from Methods). There are a number of upcoming features that will require codegen of things that are not quite method specializations (See design doc linked in #52797 and things like #50641). This helps pave the road for that. 4. I've previously considered expanding the kinds of vararg signatures that can be described (see e.g. #53851), which also requires a decoupling of the signature and ast notions of vararg. This again lays the groundwork for that, although I have no immediate plans to implement this change. Impact wise, this adds an internal field, which is not too breaking, but downstream clients vary in how they construct their `CodeInfo`s and the current way they're doing it will likely be incorrect after this change, so they will require a small two-line adjustment. We should perhaps consider pulling out some of the more common patterns into a more stable package, since interface in most of the last few releases, but that's a separate issue.
Keno
added a commit
that referenced
this pull request
May 7, 2024
This changes the canonical source of truth for va handling from `Method` to `CodeInfo`. There are multiple goals for this change: 1. This addresses a longstanding complaint about the way that CodeInfo-returning generated functions work. Previously, the va-ness or not of the returned CodeInfo always had to match that of the generator. For Cassette-like transforms that generally have one big generator function that is varargs (while then looking up lowered code that is not varargs), this could become quite annoying. It's possible to workaround, but there is really no good reason to tie the two together. As we observed when we implemented OpaqueClosures, the vararg-ness of the signature and the `vararg arguments`->`tuple` transformation are mostly independent concepts. With this PR, generated functions can return CodeInfos with whatever combination of nargs/isva is convenient. 2. This change requires clarifying where the va processing boundary is in inference. #54076 was already moving in that direction for irinterp, and this essentially does much of the same for regular inference. As a consequence the constprop cache is now using non-va-cooked signatures, which I think is preferable. 3. This further decouples codegen from the presence of a `Method` (which is already not assumed, since the code being generated could be a toplevel thunk, but some codegen features are only available to things that come from Methods). There are a number of upcoming features that will require codegen of things that are not quite method specializations (See design doc linked in #52797 and things like #50641). This helps pave the road for that. 4. I've previously considered expanding the kinds of vararg signatures that can be described (see e.g. #53851), which also requires a decoupling of the signature and ast notions of vararg. This again lays the groundwork for that, although I have no immediate plans to implement this change. Impact wise, this adds an internal field, which is not too breaking, but downstream clients vary in how they construct their `CodeInfo`s and the current way they're doing it will likely be incorrect after this change, so they will require a small two-line adjustment. We should perhaps consider pulling out some of the more common patterns into a more stable package, since interface in most of the last few releases, but that's a separate issue.
Keno
added a commit
that referenced
this pull request
May 11, 2024
This changes the canonical source of truth for va handling from `Method` to `CodeInfo`. There are multiple goals for this change: 1. This addresses a longstanding complaint about the way that CodeInfo-returning generated functions work. Previously, the va-ness or not of the returned CodeInfo always had to match that of the generator. For Cassette-like transforms that generally have one big generator function that is varargs (while then looking up lowered code that is not varargs), this could become quite annoying. It's possible to workaround, but there is really no good reason to tie the two together. As we observed when we implemented OpaqueClosures, the vararg-ness of the signature and the `vararg arguments`->`tuple` transformation are mostly independent concepts. With this PR, generated functions can return CodeInfos with whatever combination of nargs/isva is convenient. 2. This change requires clarifying where the va processing boundary is in inference. #54076 was already moving in that direction for irinterp, and this essentially does much of the same for regular inference. As a consequence the constprop cache is now using non-va-cooked signatures, which I think is preferable. 3. This further decouples codegen from the presence of a `Method` (which is already not assumed, since the code being generated could be a toplevel thunk, but some codegen features are only available to things that come from Methods). There are a number of upcoming features that will require codegen of things that are not quite method specializations (See design doc linked in #52797 and things like #50641). This helps pave the road for that. 4. I've previously considered expanding the kinds of vararg signatures that can be described (see e.g. #53851), which also requires a decoupling of the signature and ast notions of vararg. This again lays the groundwork for that, although I have no immediate plans to implement this change. Impact wise, this adds an internal field, which is not too breaking, but downstream clients vary in how they construct their `CodeInfo`s and the current way they're doing it will likely be incorrect after this change, so they will require a small two-line adjustment. We should perhaps consider pulling out some of the more common patterns into a more stable package, since interface in most of the last few releases, but that's a separate issue.
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Currently we perform the va transform inside the innermost construct of IRInterpretationState. However, I think it makes more sense to lift this processing one level, so that the
argtypesfor the constructor that takesirmatchesir.argtypes, while the one for the constructor that takesmiis the full expanded out argtypes. NFC for base, but theirconstructor is used in downstream external absints. However, I think this way around is better for them also, since it's not always clear what format the argtypes they have are in and the va direction is easy and well supported, so it's better to have the option.