[PATCH] D26488: [GVN] Basic optimization remark support

[Adam Nemet via llvm-commits]

anemet created this revision.
anemet added reviewers: hfinkel, dberlin.
anemet added a subscriber: llvm-commits.
Herald added a subscriber: fhahn.

Follow-on patches will add more interesting cases.

The goal of this patch-set is to get the GVN messages printed in
opt-viewer from Dhrystone as was presented in my Dev Meeting talk.  This
is the optimization view for the function (the last remark in the
function has a bug which is fixed in this series):
http://lab.llvm.org:8080/artifacts/opt-view_test-suite/build/SingleSource/Benchmarks/Dhrystone/CMakeFiles/dry.dir/html/_org_test-suite_SingleSource_Benchmarks_Dhrystone_dry.c.html#L430


https://reviews.llvm.org/D26488

Files:
  include/llvm/IR/DiagnosticInfo.h
  include/llvm/Transforms/Scalar/GVN.h
  lib/IR/DiagnosticInfo.cpp
  lib/Transforms/Scalar/GVN.cpp
  test/Transforms/GVN/opt-remarks.ll

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