[all-commits] [llvm/llvm-project] 42ffba: Add a clarifying a comment on CastInst::isNoopCast

[Philip Reames via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 42ffba051894a66cf6d7b9a357e765a392d983ed
      https://github.com/llvm/llvm-project/commit/42ffba051894a66cf6d7b9a357e765a392d983ed
  Author: Philip Reames <listmail at philipreames.com>
  Date:   2020-10-07 (Wed, 07 Oct 2020)

  Changed paths:
    M llvm/include/llvm/IR/InstrTypes.h

  Log Message:
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  Add a clarifying a comment on CastInst::isNoopCast

I made exactly the mistake described, so document the precondition.  It would be better to have an assert, but there is (currently) no "castIsValid" with purely type arguments.