[all-commits] [llvm/llvm-project] 89aa33: [RemoveDIs][DebugInfo] Remove redundant DPVAssigns...

[Stephen Tozer via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 89aa3355e2366c6cf6ad9ac1f4693ff950d86c30
      https://github.com/llvm/llvm-project/commit/89aa3355e2366c6cf6ad9ac1f4693ff950d86c30
  Author: Stephen Tozer <stephen.tozer at sony.com>
  Date:   2024-01-22 (Mon, 22 Jan 2024)

  Changed paths:
    M llvm/include/llvm/IR/DebugInfo.h
    M llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
    M llvm/test/DebugInfo/Generic/assignment-tracking/instcombine/remove-redundant-dbg.ll
    M llvm/test/DebugInfo/Generic/assignment-tracking/remove-redundant.ll
    M llvm/test/DebugInfo/Generic/assignment-tracking/sroa/remove-redundant-dbg.ll

  Log Message:
  -----------
  [RemoveDIs][DebugInfo] Remove redundant DPVAssigns (#78574)

DPValues are already supported by most of the utilities that remove
redundant debug info after certain passes; the exception to this is
`removeUndefDbgAssignsFromEntryBlock`, which applies only to
llvm.dbg.assigns which were previously unimplemented for DPValues. Now
that DPVAssigns exist, we have to support removing redundant instances
in the same way, which this patch implements.