#define DEBUG_TYPE "tti"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/Operator.h"
#include "llvm/IR/Instruction.h"
-#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Instructions.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Operator.h"
+#include "llvm/Support/CallSite.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
return PrevTTI->getGEPCost(Ptr, Operands);
}
+unsigned TargetTransformInfo::getCallCost(FunctionType *FTy,
+ int NumArgs) const {
+ return PrevTTI->getCallCost(FTy, NumArgs);
+}
+
+unsigned TargetTransformInfo::getCallCost(const Function *F,
+ int NumArgs) const {
+ return PrevTTI->getCallCost(F, NumArgs);
+}
+
+unsigned TargetTransformInfo::getCallCost(
+ const Function *F, ArrayRef<const Value *> Arguments) const {
+ return PrevTTI->getCallCost(F, Arguments);
+}
+
+unsigned TargetTransformInfo::getIntrinsicCost(
+ Intrinsic::ID IID, Type *RetTy, ArrayRef<Type *> ParamTys) const {
+ return PrevTTI->getIntrinsicCost(IID, RetTy, ParamTys);
+}
+
+unsigned TargetTransformInfo::getIntrinsicCost(
+ Intrinsic::ID IID, Type *RetTy, ArrayRef<const Value *> Arguments) const {
+ return PrevTTI->getIntrinsicCost(IID, RetTy, Arguments);
+}
+
unsigned TargetTransformInfo::getUserCost(const User *U) const {
return PrevTTI->getUserCost(U);
}
+bool TargetTransformInfo::hasBranchDivergence() const {
+ return PrevTTI->hasBranchDivergence();
+}
+
+bool TargetTransformInfo::isLoweredToCall(const Function *F) const {
+ return PrevTTI->isLoweredToCall(F);
+}
+
+void TargetTransformInfo::getUnrollingPreferences(Loop *L,
+ UnrollingPreferences &UP) const {
+ PrevTTI->getUnrollingPreferences(L, UP);
+}
+
bool TargetTransformInfo::isLegalAddImmediate(int64_t Imm) const {
return PrevTTI->isLegalAddImmediate(Imm);
}
Scale);
}
+int TargetTransformInfo::getScalingFactorCost(Type *Ty, GlobalValue *BaseGV,
+ int64_t BaseOffset,
+ bool HasBaseReg,
+ int64_t Scale) const {
+ return PrevTTI->getScalingFactorCost(Ty, BaseGV, BaseOffset, HasBaseReg,
+ Scale);
+}
+
bool TargetTransformInfo::isTruncateFree(Type *Ty1, Type *Ty2) const {
return PrevTTI->isTruncateFree(Ty1, Ty2);
}
return PrevTTI->getPopcntSupport(IntTyWidthInBit);
}
+bool TargetTransformInfo::haveFastSqrt(Type *Ty) const {
+ return PrevTTI->haveFastSqrt(Ty);
+}
+
unsigned TargetTransformInfo::getIntImmCost(const APInt &Imm, Type *Ty) const {
return PrevTTI->getIntImmCost(Imm, Ty);
}
}
unsigned TargetTransformInfo::getArithmeticInstrCost(unsigned Opcode,
- Type *Ty) const {
- return PrevTTI->getArithmeticInstrCost(Opcode, Ty);
+ Type *Ty,
+ OperandValueKind Op1Info,
+ OperandValueKind Op2Info) const {
+ return PrevTTI->getArithmeticInstrCost(Opcode, Ty, Op1Info, Op2Info);
}
unsigned TargetTransformInfo::getShuffleCost(ShuffleKind Kind, Type *Tp,
return PrevTTI->getNumberOfParts(Tp);
}
+unsigned TargetTransformInfo::getAddressComputationCost(Type *Tp,
+ bool IsComplex) const {
+ return PrevTTI->getAddressComputationCost(Tp, IsComplex);
+}
+
+unsigned TargetTransformInfo::getReductionCost(unsigned Opcode, Type *Ty,
+ bool IsPairwise) const {
+ return PrevTTI->getReductionCost(Opcode, Ty, IsPairwise);
+}
namespace {
virtual void initializePass() {
// Note that this subclass is special, and must *not* call initializeTTI as
// it does not chain.
+ TopTTI = this;
PrevTTI = 0;
DL = getAnalysisIfAvailable<DataLayout>();
}
// Otherwise, the default basic cost is used.
return TCC_Basic;
- case Instruction::IntToPtr:
+ case Instruction::IntToPtr: {
+ if (!DL)
+ return TCC_Basic;
+
// An inttoptr cast is free so long as the input is a legal integer type
// which doesn't contain values outside the range of a pointer.
- if (DL && DL->isLegalInteger(OpTy->getScalarSizeInBits()) &&
- OpTy->getScalarSizeInBits() <= DL->getPointerSizeInBits())
+ unsigned OpSize = OpTy->getScalarSizeInBits();
+ if (DL->isLegalInteger(OpSize) &&
+ OpSize <= DL->getPointerTypeSizeInBits(Ty))
return TCC_Free;
// Otherwise it's not a no-op.
return TCC_Basic;
+ }
+ case Instruction::PtrToInt: {
+ if (!DL)
+ return TCC_Basic;
- case Instruction::PtrToInt:
// A ptrtoint cast is free so long as the result is large enough to store
// the pointer, and a legal integer type.
- if (DL && DL->isLegalInteger(OpTy->getScalarSizeInBits()) &&
- OpTy->getScalarSizeInBits() >= DL->getPointerSizeInBits())
+ unsigned DestSize = Ty->getScalarSizeInBits();
+ if (DL->isLegalInteger(DestSize) &&
+ DestSize >= DL->getPointerTypeSizeInBits(OpTy))
return TCC_Free;
// Otherwise it's not a no-op.
return TCC_Basic;
-
+ }
case Instruction::Trunc:
// trunc to a native type is free (assuming the target has compare and
// shift-right of the same width).
return TCC_Free;
}
+ unsigned getCallCost(FunctionType *FTy, int NumArgs = -1) const {
+ assert(FTy && "FunctionType must be provided to this routine.");
+
+ // The target-independent implementation just measures the size of the
+ // function by approximating that each argument will take on average one
+ // instruction to prepare.
+
+ if (NumArgs < 0)
+ // Set the argument number to the number of explicit arguments in the
+ // function.
+ NumArgs = FTy->getNumParams();
+
+ return TCC_Basic * (NumArgs + 1);
+ }
+
+ unsigned getCallCost(const Function *F, int NumArgs = -1) const {
+ assert(F && "A concrete function must be provided to this routine.");
+
+ if (NumArgs < 0)
+ // Set the argument number to the number of explicit arguments in the
+ // function.
+ NumArgs = F->arg_size();
+
+ if (Intrinsic::ID IID = (Intrinsic::ID)F->getIntrinsicID()) {
+ FunctionType *FTy = F->getFunctionType();
+ SmallVector<Type *, 8> ParamTys(FTy->param_begin(), FTy->param_end());
+ return TopTTI->getIntrinsicCost(IID, FTy->getReturnType(), ParamTys);
+ }
+
+ if (!TopTTI->isLoweredToCall(F))
+ return TCC_Basic; // Give a basic cost if it will be lowered directly.
+
+ return TopTTI->getCallCost(F->getFunctionType(), NumArgs);
+ }
+
+ unsigned getCallCost(const Function *F,
+ ArrayRef<const Value *> Arguments) const {
+ // Simply delegate to generic handling of the call.
+ // FIXME: We should use instsimplify or something else to catch calls which
+ // will constant fold with these arguments.
+ return TopTTI->getCallCost(F, Arguments.size());
+ }
+
+ unsigned getIntrinsicCost(Intrinsic::ID IID, Type *RetTy,
+ ArrayRef<Type *> ParamTys) const {
+ switch (IID) {
+ default:
+ // Intrinsics rarely (if ever) have normal argument setup constraints.
+ // Model them as having a basic instruction cost.
+ // FIXME: This is wrong for libc intrinsics.
+ return TCC_Basic;
+
+ case Intrinsic::dbg_declare:
+ case Intrinsic::dbg_value:
+ case Intrinsic::invariant_start:
+ case Intrinsic::invariant_end:
+ case Intrinsic::lifetime_start:
+ case Intrinsic::lifetime_end:
+ case Intrinsic::objectsize:
+ case Intrinsic::ptr_annotation:
+ case Intrinsic::var_annotation:
+ // These intrinsics don't actually represent code after lowering.
+ return TCC_Free;
+ }
+ }
+
+ unsigned getIntrinsicCost(Intrinsic::ID IID, Type *RetTy,
+ ArrayRef<const Value *> Arguments) const {
+ // Delegate to the generic intrinsic handling code. This mostly provides an
+ // opportunity for targets to (for example) special case the cost of
+ // certain intrinsics based on constants used as arguments.
+ SmallVector<Type *, 8> ParamTys;
+ ParamTys.reserve(Arguments.size());
+ for (unsigned Idx = 0, Size = Arguments.size(); Idx != Size; ++Idx)
+ ParamTys.push_back(Arguments[Idx]->getType());
+ return TopTTI->getIntrinsicCost(IID, RetTy, ParamTys);
+ }
+
unsigned getUserCost(const User *U) const {
+ if (isa<PHINode>(U))
+ return TCC_Free; // Model all PHI nodes as free.
+
if (const GEPOperator *GEP = dyn_cast<GEPOperator>(U))
// In the basic model we just assume that all-constant GEPs will be
// folded into their uses via addressing modes.
return GEP->hasAllConstantIndices() ? TCC_Free : TCC_Basic;
- // If we have a call of an intrinsic we can provide more detailed analysis
- // by inspecting the particular intrinsic called.
- // FIXME: Hoist this out into a getIntrinsicCost routine.
- if (const IntrinsicInst *II = dyn_cast<IntrinsicInst>(U)) {
- switch (II->getIntrinsicID()) {
- default:
- return TCC_Basic;
- case Intrinsic::dbg_declare:
- case Intrinsic::dbg_value:
- case Intrinsic::invariant_start:
- case Intrinsic::invariant_end:
- case Intrinsic::lifetime_start:
- case Intrinsic::lifetime_end:
- case Intrinsic::objectsize:
- case Intrinsic::ptr_annotation:
- case Intrinsic::var_annotation:
- // These intrinsics don't count as size.
- return TCC_Free;
+ if (ImmutableCallSite CS = U) {
+ const Function *F = CS.getCalledFunction();
+ if (!F) {
+ // Just use the called value type.
+ Type *FTy = CS.getCalledValue()->getType()->getPointerElementType();
+ return TopTTI->getCallCost(cast<FunctionType>(FTy), CS.arg_size());
}
+
+ SmallVector<const Value *, 8> Arguments;
+ for (ImmutableCallSite::arg_iterator AI = CS.arg_begin(),
+ AE = CS.arg_end();
+ AI != AE; ++AI)
+ Arguments.push_back(*AI);
+
+ return TopTTI->getCallCost(F, Arguments);
}
if (const CastInst *CI = dyn_cast<CastInst>(U)) {
U->getOperand(0)->getType() : 0);
}
+ bool hasBranchDivergence() const { return false; }
+
+ bool isLoweredToCall(const Function *F) const {
+ // FIXME: These should almost certainly not be handled here, and instead
+ // handled with the help of TLI or the target itself. This was largely
+ // ported from existing analysis heuristics here so that such refactorings
+ // can take place in the future.
+
+ if (F->isIntrinsic())
+ return false;
+
+ if (F->hasLocalLinkage() || !F->hasName())
+ return true;
+
+ StringRef Name = F->getName();
+
+ // These will all likely lower to a single selection DAG node.
+ if (Name == "copysign" || Name == "copysignf" || Name == "copysignl" ||
+ Name == "fabs" || Name == "fabsf" || Name == "fabsl" || Name == "sin" ||
+ Name == "sinf" || Name == "sinl" || Name == "cos" || Name == "cosf" ||
+ Name == "cosl" || Name == "sqrt" || Name == "sqrtf" || Name == "sqrtl")
+ return false;
+
+ // These are all likely to be optimized into something smaller.
+ if (Name == "pow" || Name == "powf" || Name == "powl" || Name == "exp2" ||
+ Name == "exp2l" || Name == "exp2f" || Name == "floor" || Name ==
+ "floorf" || Name == "ceil" || Name == "round" || Name == "ffs" ||
+ Name == "ffsl" || Name == "abs" || Name == "labs" || Name == "llabs")
+ return false;
+
+ return true;
+ }
+
+ void getUnrollingPreferences(Loop *, UnrollingPreferences &) const { }
+
bool isLegalAddImmediate(int64_t Imm) const {
return false;
}
return !BaseGV && BaseOffset == 0 && Scale <= 1;
}
+ int getScalingFactorCost(Type *Ty, GlobalValue *BaseGV, int64_t BaseOffset,
+ bool HasBaseReg, int64_t Scale) const {
+ // Guess that all legal addressing mode are free.
+ if(isLegalAddressingMode(Ty, BaseGV, BaseOffset, HasBaseReg, Scale))
+ return 0;
+ return -1;
+ }
+
+
bool isTruncateFree(Type *Ty1, Type *Ty2) const {
return false;
}
return PSK_Software;
}
+ bool haveFastSqrt(Type *Ty) const {
+ return false;
+ }
+
unsigned getIntImmCost(const APInt &Imm, Type *Ty) const {
return 1;
}
return 1;
}
- unsigned getArithmeticInstrCost(unsigned Opcode, Type *Ty) const {
+ unsigned getArithmeticInstrCost(unsigned Opcode, Type *Ty, OperandValueKind,
+ OperandValueKind) const {
return 1;
}
unsigned getNumberOfParts(Type *Tp) const {
return 0;
}
+
+ unsigned getAddressComputationCost(Type *Tp, bool) const {
+ return 0;
+ }
+
+ unsigned getReductionCost(unsigned, Type *, bool) const {
+ return 1;
+ }
};
} // end anonymous namespace
projects / oota-llvm.git / blobdiff