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[RISCV] Add documentation in the LangRef on GHC CC #72762

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Merged
merged 2 commits into from
Jan 9, 2024
Merged

[RISCV] Add documentation in the LangRef on GHC CC #72762

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[RISCV] Add documentation in the LangRef on GHC CC
boomanaiden154 Nov 18, 2023
9c2c5b0
Fix bad rebase
boomanaiden154 Dec 3, 2023
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7 changes: 5 additions & 2 deletions llvm/docs/LangRef.rst
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Expand Up @@ -317,8 +317,8 @@ added in the future:
not be used lightly but only for specific situations such as an
alternative to the *register pinning* performance technique often
used when implementing functional programming languages. At the
moment only X86 and AArch64 support this convention. The following
limitations exist:
moment only X86, AArch64, and RISCV support this convention. The
following limitations exist:

- On *X86-32* only up to 4 bit type parameters are supported. No
floating-point types are supported.
Expand All @@ -327,6 +327,9 @@ added in the future:
- On *AArch64* only up to 4 32-bit floating-point parameters,
4 64-bit floating-point parameters, and 10 bit type parameters
are supported.
- *RISCV64* only supports up to 11 bit type parameters, 4
32-bit floating-point parameters, and 4 64-bit floating-point
parameters.

This calling convention supports `tail call
optimization <CodeGenerator.html#tail-call-optimization>`_ but requires
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