Add RISCV64 Native Code Generator (NCG) to master

This is the RISC64 NCG branch that will be merged; i.e. it's based on master.

The testsuite is 100% successful/"green".

Commits could be more squashed, however I would wait for the commits to come from fixing (upcoming) review comments.

Tickets:

• #16783 (closed)
• #23179 (closed)

A quick guide to build this as cross-compiler with Nix: https://gitlab.haskell.org/ghc/ghc/-/wikis/RISCV64/RISCV64-Nix-cross-environment-(hacky)

changed title from Draft: Add RISCV64 Native Code Generator (NCG) to Draft: Add RISCV64 Native Code Generator (NCG) to master

added NCG backend RISC-V labels

changed the description

added 1 commit

• de95068e - WIP: FIXUP for master

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added 24 commits

• de95068e...610840eb - 13 commits from branch master
• dee58efa - 1 earlier commit
• 9a3f20b3 - async001: Adjust for slower computers
• 141292cf - Add RTS linker for RISCV64
• 92154e52 - Ignore divbyzero test for RISCV64
• 9f6261c3 - Enable MulMayOflo_full test for RISCV64
• 1112aab0 - LibffiAdjustor: Ensure code caches are flushed (RISCV64)
• 4ec8580f - Add additional linker symbols for builtins (RISCV64)
• f055b407 - Add GHCi support for RISCV64
• 9c8d0972 - Set codeowners of the RISCV64 NCG
• 55465ebd - Add test for C calling convention
• 445b5e94 - WIP: FIXUP for master

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added 1 commit

• 23347965 - RISCV64 has rtsLinker

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added 1 commit

• 50d8bf94 - RISCV64 has rtsLinker

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added 42 commits

• 50d8bf94...1f95c5e4 - 30 commits from branch master
• 1f95c5e4...9556d91c - 2 earlier commits
• 17a392a9 - Add RTS linker for RISCV64
• a6b43bd6 - Ignore divbyzero test for RISCV64
• 5d90ab28 - Enable MulMayOflo_full test for RISCV64
• 47ac5d19 - LibffiAdjustor: Ensure code caches are flushed (RISCV64)
• 71695a10 - Add additional linker symbols for builtins (RISCV64)
• 4a32b6a9 - Add GHCi support for RISCV64
• c0ce6b1c - Set codeowners of the RISCV64 NCG
• aa3a0c0d - Add test for C calling convention
• 6933ea79 - WIP: FIXUP for master
• 9fbe9cef - RISCV64 has rtsLinker

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mentioned in merge request !12783 (closed)

added 1 commit

• 0962e7ad - Make switch/jump tables PIC compatible

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changed the description

added 2 commits

• 45d3d6bd - Improve documentation for stack spills
• a38bf454 - Reformat stack spill code

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resolved all threads

added 2 commits

• 3b4dc97b - Make instruction types strict in their fields
• 26c79cfa - Use FCVT constructor for all float-related conversions

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mentioned in merge request !12860 (closed)

added 2 commits

• f208f182 - Fix regression in RISCV64 RTS linker
• 22fc1a09 - Adjust test timings for small machines

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marked this merge request as ready

changed the description