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68 lines
2.1 KiB
Markdown
68 lines
2.1 KiB
Markdown
# Builtin Dialect
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The builtin dialect contains a core set of Attributes, Operations, and Types
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that have wide applicability across a very large number of domains and
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abstractions. Many of the components of this dialect are also instrumental in
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the implementation of the core IR. As such, this dialect is implicitly loaded in
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every `MLIRContext`, and available directly to all users of MLIR.
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Given the far-reaching nature of this dialect and the fact that MLIR is
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extensible by design, any potential additions are heavily scrutinized.
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[TOC]
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## Attributes
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[include "Dialects/BuiltinAttributes.md"]
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## Location Attributes
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A subset of the builtin attribute values correspond to
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[source locations](../Diagnostics.md/#source-locations), that may be attached to
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Operations.
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[include "Dialects/BuiltinLocationAttributes.md"]
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## DistinctAttribute
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A DistinctAttribute associates an attribute with a unique identifier.
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As a result, multiple DistinctAttribute instances may point to the same
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attribute. Every call to the `create` function allocates a new
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DistinctAttribute instance. The address of the attribute instance serves as a
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temporary unique identifier. Similar to the names of SSA values, the final
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unique identifiers are generated during pretty printing. This delayed
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numbering ensures the printed identifiers are deterministic even if
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multiple DistinctAttribute instances are created in-parallel.
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Syntax:
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```
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distinct-id ::= integer-literal
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distinct-attribute ::= `distinct` `[` distinct-id `]<` attribute `>`
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```
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Examples:
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```mlir
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#distinct = distinct[0]<42.0 : f32>
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#distinct1 = distinct[1]<42.0 : f32>
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#distinct2 = distinct[2]<array<i32: 10, 42>>
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```
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This mechanism is meant to generate attributes with a unique
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identifier, which can be used to mark groups of operations that share a
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common property. For example, groups of aliasing memory operations may be
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marked using one DistinctAttribute instance per alias group.
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## Operations
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[include "Dialects/BuiltinOps.md"]
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## Types
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[include "Dialects/BuiltinTypes.md"]
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## Type Interfaces
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[include "Dialects/BuiltinTypeInterfaces.md"]
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