[all-commits] [llvm/llvm-project] 3096b8: [flang] Don't fold zero-length substring references

[Peter Klausler via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3096b85696cc71a6b6798c6883712f7ea6a6b576
      https://github.com/llvm/llvm-project/commit/3096b85696cc71a6b6798c6883712f7ea6a6b576
  Author: Peter Klausler <pklausler at nvidia.com>
  Date:   2022-07-23 (Sat, 23 Jul 2022)

  Changed paths:
    M flang/lib/Evaluate/fold-implementation.h

  Log Message:
  -----------
  [flang] Don't fold zero-length substring references

In some contexts the code looks cleaner if we fold zero-length substring
references into empty character constants, but those don't work in
variable definition contexts and can lead to bogus semantic error
messages.

Differential Revision: https://reviews.llvm.org/D130383