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ARM cost model: Address computation in vector mem ops not free

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Adds a function to target transform info to query for the cost of address
computation. The cost model analysis pass now also queries this interface.
The code in LoopVectorize adds the cost of address computation as part of the
memory instruction cost calculation. Only there, we know whether the instruction
will be scalarized or not.
Increase the penality for inserting in to D registers on swift. This becomes
necessary because we now always assume that address computation has a cost and
three is a closer value to the architecture.

radar://13097204

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174713 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Arnold Schwaighofer
2013-02-08 14:50:48 +00:00
parent f64edf8d80
commit fb55a8fd7c
9 changed files with 134 additions and 13 deletions
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5
lib/CodeGen/BasicTargetTransformInfo.cpp
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@ -101,6 +101,7 @@ public:
virtual unsigned getIntrinsicInstrCost(Intrinsic::ID, Type *RetTy,
ArrayRef<Type*> Tys) const;
virtual unsigned getNumberOfParts(Type *Tp) const;
virtual unsigned getAddressComputationCost(Type *Ty) const;
/// @}
};
@ -400,3 +401,7 @@ unsigned BasicTTI::getNumberOfParts(Type *Tp) const {
std::pair<unsigned, MVT> LT = TLI->getTypeLegalizationCost(Tp);
return LT.first;
}
unsigned BasicTTI::getAddressComputationCost(Type *Ty) const {
return 0;
}