[PATCH] D132288: [TTI] Improve description of TargetCostKind enums to aid targets in choosing cost values

Simon Pilgrim via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Fri Sep 2 03:09:26 PDT 2022


This revision was automatically updated to reflect the committed changes.
Closed by commit rG7338f9709bba: [TTI] Improve description of TargetCostKind enums to aid targets in choosing… (authored by RKSimon).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D132288/new/

https://reviews.llvm.org/D132288

Files:
  llvm/include/llvm/Analysis/TargetTransformInfo.h


Index: llvm/include/llvm/Analysis/TargetTransformInfo.h
===================================================================
--- llvm/include/llvm/Analysis/TargetTransformInfo.h
+++ llvm/include/llvm/Analysis/TargetTransformInfo.h
@@ -212,6 +212,8 @@
   ///
   /// There are several different cost models that can be customized by the
   /// target. The normalization of each cost model may be target specific.
+  /// e.g. TCK_SizeAndLatency should be comparable to target thresholds such as
+  /// those derived from MCSchedModel::LoopMicroOpBufferSize etc.
   enum TargetCostKind {
     TCK_RecipThroughput, ///< Reciprocal throughput.
     TCK_Latency,         ///< The latency of instruction.


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