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[System Model] [TTI] Move default cache/prefetch implementations 

Move the default implementations of cache and prefetch queries to
TargetTransformInfoImplBase and delete them from NoTIIImpl.  This brings these
interfaces in line with how other TTI interfaces work.

Differential Revision: https://reviews.llvm.org/D68804

llvm-svn: 374446
This commit is contained in:
David Greene 2019-10-10 20:39:27 +00:00
parent 366ada1d06
commit 7c562f1286
3 changed files with 35 additions and 30 deletions
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28
llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
View File

@ -371,6 +371,34 @@ public:
return false;
}
unsigned getCacheLineSize() const { return 0; }
llvm::Optional<unsigned> getCacheSize(TargetTransformInfo::CacheLevel Level) const {
switch (Level) {
case TargetTransformInfo::CacheLevel::L1D:
LLVM_FALLTHROUGH;
case TargetTransformInfo::CacheLevel::L2D:
return llvm::Optional<unsigned>();
}
llvm_unreachable("Unknown TargetTransformInfo::CacheLevel");
}
llvm::Optional<unsigned> getCacheAssociativity(
TargetTransformInfo::CacheLevel Level) const {
switch (Level) {
case TargetTransformInfo::CacheLevel::L1D:
LLVM_FALLTHROUGH;
case TargetTransformInfo::CacheLevel::L2D:
return llvm::Optional<unsigned>();
}
llvm_unreachable("Unknown TargetTransformInfo::CacheLevel");
}
unsigned getPrefetchDistance() const { return 0; }
unsigned getMinPrefetchStride() const { return 1; }
unsigned getMaxPrefetchIterationsAhead() const { return UINT_MAX; }
unsigned getMaxInterleaveFactor(unsigned VF) { return 1; }
unsigned getArithmeticInstrCost(unsigned Opcode, Type *Ty,

9
llvm/include/llvm/CodeGen/BasicTTIImpl.h
View File

@ -523,8 +523,13 @@ public:
virtual Optional<unsigned>
getCacheAssociativity(TargetTransformInfo::CacheLevel Level) const {
return Optional<unsigned>(
getST()->getCacheAssociativity(static_cast<unsigned>(Level)));
Optional<unsigned> TargetResult =
getST()->getCacheAssociativity(static_cast<unsigned>(Level));
if (TargetResult)
return TargetResult;
return BaseT::getCacheAssociativity(Level);
}
virtual unsigned getCacheLineSize() const {

28
llvm/lib/Analysis/TargetTransformInfo.cpp
View File

@ -40,34 +40,6 @@ namespace {
struct NoTTIImpl : TargetTransformInfoImplCRTPBase<NoTTIImpl> {
explicit NoTTIImpl(const DataLayout &DL)
: TargetTransformInfoImplCRTPBase<NoTTIImpl>(DL) {}
unsigned getCacheLineSize() const { return 0; }
llvm::Optional<unsigned> getCacheSize(TargetTransformInfo::CacheLevel Level) const {
switch (Level) {
case TargetTransformInfo::CacheLevel::L1D:
LLVM_FALLTHROUGH;
case TargetTransformInfo::CacheLevel::L2D:
return llvm::Optional<unsigned>();
}
llvm_unreachable("Unknown TargetTransformInfo::CacheLevel");
}
llvm::Optional<unsigned> getCacheAssociativity(
TargetTransformInfo::CacheLevel Level) const {
switch (Level) {
case TargetTransformInfo::CacheLevel::L1D:
LLVM_FALLTHROUGH;
case TargetTransformInfo::CacheLevel::L2D:
return llvm::Optional<unsigned>();
}
llvm_unreachable("Unknown TargetTransformInfo::CacheLevel");
}
unsigned getPrefetchDistance() const { return 0; }
unsigned getMinPrefetchStride() const { return 1; }
unsigned getMaxPrefetchIterationsAhead() const { return UINT_MAX; }
};
}