[all-commits] [llvm/llvm-project] 1cae2f: [RISCV] Correct the CallPreservedMask for the func...

[ShivaChen via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 1cae2f9d192c69833e22684ca338660942ab464e
      https://github.com/llvm/llvm-project/commit/1cae2f9d192c69833e22684ca338660942ab464e
  Author: Shiva Chen <shiva at andestech.com>
  Date:   2020-02-15 (Sat, 15 Feb 2020)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVRegisterInfo.cpp
    A llvm/test/CodeGen/RISCV/interrupt-attr-callee.ll

  Log Message:
  -----------
  [RISCV] Correct the CallPreservedMask for the function call in an interrupt handler

CallPreservedMask is used to describe the register liveness after a
function call. The function call in an interrupt handler should use the same
CallPreservedMask as normal functions. So that only callee save registers
can live through the function call.