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[mlir] Clarify docs around LLVM dialect-compatible types 

Explicitly mention that there is exactly one MLIR type that corresponds
to a given LLVM IR type.
This commit is contained in:
Alex Zinenko 2021-01-19 13:42:16 +01:00
parent 2c4f6be86c
commit 9a60ad216d
1 changed files with 5 additions and 0 deletions
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mlir/docs/Dialects/LLVM.md
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@ -224,6 +224,11 @@ compatible. For example, signed and unsigned integers are not compatible. LLVM
provides a function, `bool LLVM::isCompatibleType(Type)`, that can be used as a
compatibility check.
Each LLVM IR type corresponds to *exactly one* MLIR type, either built-in or
LLVM dialect type. For example, because `i32` is LLVM-compatible, there is no
`!llvm.i32` type. However, `!llvm.ptr<T>` is defined in the LLVM dialect as
there is no corresponding built-in type.
### Additional Simple Types
The following non-parametric types derived from the LLVM IR are available in the