[PATCH] D98610: [RISCV] Support clang -fpatchable-function-entry && GNU function attribute 'patchable_function_entry'

[Fangrui Song via Phabricator via llvm-commits]

MaskRay created this revision.
MaskRay added reviewers: asb, craig.topper, HsiangKai, khchen.
Herald added subscribers: vkmr, frasercrmck, evandro, luismarques, apazos, sameer.abuasal, pengfei, s.egerton, Jim, benna, psnobl, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, jrtc27, shiva0217, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, hiraditya, kristof.beyls.
Herald added a reviewer: aaron.ballman.
MaskRay requested review of this revision.
Herald added projects: clang, LLVM.
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Similar to D72215 <https://reviews.llvm.org/D72215> (AArch64) and D72220 <https://reviews.llvm.org/D72220> (x86).

Recently the mainline kernel started to use -fpatchable-function-entry=8 for riscv (https://git.kernel.org/linus/afc76b8b80112189b6f11e67e19cf58301944814).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D98610

Files:
  clang/include/clang/Basic/Attr.td
  clang/lib/Driver/ToolChains/Clang.cpp
  clang/test/Driver/fpatchable-function-entry.c
  clang/test/Sema/patchable-function-entry-attr.cpp
  llvm/lib/Target/RISCV/RISCV.h
  llvm/lib/Target/RISCV/RISCVAsmPrinter.cpp
  llvm/lib/Target/RISCV/RISCVInstrInfo.cpp
  llvm/lib/Target/RISCV/RISCVInstrInfo.h
  llvm/lib/Target/RISCV/RISCVMCInstLower.cpp
  llvm/test/CodeGen/RISCV/patchable-function-entry.ll

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