[PATCH] D57240: [RISCV] Don't incorrectly force relocation for %pcrel_lo

[James Clarke via Phabricator via llvm-commits]

jrtc27 added a comment.
Herald added a project: LLVM.

Could we not have a situation where the pcrel_hi20 is seen *after* the lo12, in which case the lo12 would be forced but the hi20 could still be evaluated? E.g. I think the following would be problematic:

  foo:
      j 1f
  0:  addi a0, a0, %pcrel_lo(1f)
      ret
  1: auipc a0, %pcrel_hi(bar)
      j 0b
  
  .align 2
  bar:
      # ...

Obviously extremely pathological code, but nonetheless valid.


Repository:
  rL LLVM

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  https://reviews.llvm.org/D57240/new/

https://reviews.llvm.org/D57240