This improves type safety and is less verbose. Use SimpleTy only where
an integer is needed like switches or emitting a VBR.
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Co-authored-by: Sergei Barannikov <barannikov88@gmail.com>
This is a generalization of the LookupPtrRegClass mechanism.
AMDGPU has several use cases for swapping the register class of
instruction operands based on the subtarget, but none of them
really fit into the box of being pointer-like.
The current system requires manual management of an arbitrary integer
ID. For the AMDGPU use case, this would end up being around 40 new
entries to manage.
This just introduces the base infrastructure. I have ports of all
the target specific usage of PointerLikeRegClass ready.
I believe it became no-op with the removal of the "positionally encoded
operands" functionality (b87dc356 is the last commit in the series).
There are no changes in the generated files.
- Change `hadOperandNamed` to return index as std::optional and rename
it to `findOperandNamed`.
- Change `SubOperandAlias` to return std::optional and rename it to
`findSubOperandAlias`.
- Change `Name`, `SubopNames`, `PrinterMethodName`, and
`EncoderMethodNames` to be stored as StringRef.
- Also changed `CheckComplexPatMatcher::Name` to StringRef as a fallout
from the above.
Verified that all the tablegen generated files within LLVM are
unchanged.
Refactor of the llvm-tblgen source into:
- a "Basic" library, which contains the bare minimum utilities to build
`llvm-min-tablegen`
- a "Common" library which contains all of the helpers for TableGen
backends. Such helpers can be shared by more than one backend, and even
unit tested (e.g. CodeExpander is, maybe we can add more over time)
Fixes#80647
