[PATCH] D100020: [GreedyRA ORE] Add Cost of spill locations into remark

[Serguei Katkov via Phabricator via llvm-commits]

skatkov created this revision.
skatkov added reviewers: reames, MatzeB, anemet, thegameg.
Herald added subscribers: dantrushin, hiraditya, qcolombet.
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Herald added a project: LLVM.

Cost of spill location is computed basing on relative branch frequency where corresponding spill/reload/copy is located.

While the number itself is highly depends on incoming IR, the total cost can be used when do some changes in RA.


https://reviews.llvm.org/D100020

Files:
  llvm/lib/CodeGen/RegAllocGreedy.cpp
  llvm/test/CodeGen/AArch64/arm64-spill-remarks-treshold-hotness.ll
  llvm/test/CodeGen/AArch64/arm64-spill-remarks.ll

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