[PATCH] D42191: [RFC] [TargetTransformInfo] Introduce isRegisterRich, it returns true if the target architecture is register-rich.

[Hongbin Zheng via Phabricator via llvm-commits]

etherzhhb created this revision.
Herald added a subscriber: llvm-commits.

Repository:
  rL LLVM

https://reviews.llvm.org/D42191

Files:
  include/llvm/Analysis/TargetTransformInfo.h
  include/llvm/Analysis/TargetTransformInfoImpl.h
  lib/Analysis/TargetTransformInfo.cpp


Index: lib/Analysis/TargetTransformInfo.cpp
===================================================================
--- lib/Analysis/TargetTransformInfo.cpp
+++ lib/Analysis/TargetTransformInfo.cpp
@@ -108,6 +108,10 @@
   return Cost;
 }
 
+bool TargetTransformInfo::isRegisterRich() const {
+  return TTIImpl->isRegisterRich();
+}
+
 bool TargetTransformInfo::hasBranchDivergence() const {
   return TTIImpl->hasBranchDivergence();
 }
Index: include/llvm/Analysis/TargetTransformInfoImpl.h
===================================================================
--- include/llvm/Analysis/TargetTransformInfoImpl.h
+++ include/llvm/Analysis/TargetTransformInfoImpl.h
@@ -178,6 +178,8 @@
     }
   }
 
+  bool isRegisterRich() { return false; }
+
   bool hasBranchDivergence() { return false; }
 
   bool isSourceOfDivergence(const Value *V) { return false; }
Index: include/llvm/Analysis/TargetTransformInfo.h
===================================================================
--- include/llvm/Analysis/TargetTransformInfo.h
+++ include/llvm/Analysis/TargetTransformInfo.h
@@ -145,6 +145,9 @@
     llvm_unreachable("Unknown instruction cost kind");
   }
 
+  /// \brief Return true if the target architecture is register-rich
+  bool isRegisterRich() const;
+
   /// \brief Underlying constants for 'cost' values in this interface.
   ///
   /// Many APIs in this interface return a cost. This enum defines the
@@ -959,6 +962,7 @@
   virtual int
   getUserCost(const User *U, ArrayRef<const Value *> Operands) = 0;
   virtual bool hasBranchDivergence() = 0;
+  virtual bool isRegisterRich() = 0;
   virtual bool isSourceOfDivergence(const Value *V) = 0;
   virtual bool isAlwaysUniform(const Value *V) = 0;
   virtual unsigned getFlatAddressSpace() = 0;
@@ -1155,6 +1159,7 @@
   int getUserCost(const User *U, ArrayRef<const Value *> Operands) override {
     return Impl.getUserCost(U, Operands);
   }
+  bool isRegisterRich() override { return Impl.isRegisterRich(); }
   bool hasBranchDivergence() override { return Impl.hasBranchDivergence(); }
   bool isSourceOfDivergence(const Value *V) override {
     return Impl.isSourceOfDivergence(V);


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