[PATCH] D48411: [RISCV] Add support for _interrupt attribute

[Ana Pazos via Phabricator via llvm-commits]

apazos updated this revision to Diff 152565.
apazos retitled this revision from "[RISCV] Support for __attribute__((interrupt))" to "[RISCV] Add support for _interrupt attribute".
apazos edited the summary of this revision.
apazos added a comment.
Herald added subscribers: brucehoult, MartinMosbeck.

Initial code was saving all registers.
Modified it to save only the ones used, or all registers if there is a call.
Still needs some fixes and tests update.
Sharing the WIP to collect feedback.


https://reviews.llvm.org/D48411

Files:
  lib/Target/RISCV/RISCVCallingConv.td
  lib/Target/RISCV/RISCVFrameLowering.cpp
  lib/Target/RISCV/RISCVISelLowering.cpp
  lib/Target/RISCV/RISCVISelLowering.h
  lib/Target/RISCV/RISCVInstrInfo.cpp
  lib/Target/RISCV/RISCVInstrInfo.td
  lib/Target/RISCV/RISCVRegisterInfo.cpp
  lib/Target/RISCV/RISCVSubtarget.cpp
  test/CodeGen/RISCV/interrupt-attr-args-error.ll
  test/CodeGen/RISCV/interrupt-attr-invalid.ll
  test/CodeGen/RISCV/interrupt-attr-ret-error.ll
  test/CodeGen/RISCV/interrupt-attr.ll

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