diff options
Diffstat (limited to 'lib/Target/R600/AMDGPUTargetTransformInfo.cpp')
-rw-r--r-- | lib/Target/R600/AMDGPUTargetTransformInfo.cpp | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/Target/R600/AMDGPUTargetTransformInfo.cpp b/lib/Target/R600/AMDGPUTargetTransformInfo.cpp new file mode 100644 index 0000000..8db319c --- /dev/null +++ b/lib/Target/R600/AMDGPUTargetTransformInfo.cpp @@ -0,0 +1,90 @@ +//===-- AMDGPUTargetTransformInfo.cpp - AMDGPU specific TTI pass ---------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// \file +// This file implements a TargetTransformInfo analysis pass specific to the +// AMDGPU target machine. It uses the target's detailed information to provide +// more precise answers to certain TTI queries, while letting the target +// independent and default TTI implementations handle the rest. +// +//===----------------------------------------------------------------------===// + +#define DEBUG_TYPE "AMDGPUtti" +#include "AMDGPU.h" +#include "AMDGPUTargetMachine.h" +#include "llvm/Analysis/TargetTransformInfo.h" +#include "llvm/Support/Debug.h" +#include "llvm/Target/TargetLowering.h" +#include "llvm/Target/CostTable.h" +using namespace llvm; + +// Declare the pass initialization routine locally as target-specific passes +// don't have a target-wide initialization entry point, and so we rely on the +// pass constructor initialization. +namespace llvm { +void initializeAMDGPUTTIPass(PassRegistry &); +} + +namespace { + +class AMDGPUTTI : public ImmutablePass, public TargetTransformInfo { + const AMDGPUTargetMachine *TM; + const AMDGPUSubtarget *ST; + const AMDGPUTargetLowering *TLI; + + /// Estimate the overhead of scalarizing an instruction. Insert and Extract + /// are set if the result needs to be inserted and/or extracted from vectors. + unsigned getScalarizationOverhead(Type *Ty, bool Insert, bool Extract) const; + +public: + AMDGPUTTI() : ImmutablePass(ID), TM(0), ST(0), TLI(0) { + llvm_unreachable("This pass cannot be directly constructed"); + } + + AMDGPUTTI(const AMDGPUTargetMachine *TM) + : ImmutablePass(ID), TM(TM), ST(TM->getSubtargetImpl()), + TLI(TM->getTargetLowering()) { + initializeAMDGPUTTIPass(*PassRegistry::getPassRegistry()); + } + + virtual void initializePass() { pushTTIStack(this); } + + virtual void finalizePass() { popTTIStack(); } + + virtual void getAnalysisUsage(AnalysisUsage &AU) const { + TargetTransformInfo::getAnalysisUsage(AU); + } + + /// Pass identification. + static char ID; + + /// Provide necessary pointer adjustments for the two base classes. + virtual void *getAdjustedAnalysisPointer(const void *ID) { + if (ID == &TargetTransformInfo::ID) + return (TargetTransformInfo *)this; + return this; + } + + virtual bool hasBranchDivergence() const; + + /// @} +}; + +} // end anonymous namespace + +INITIALIZE_AG_PASS(AMDGPUTTI, TargetTransformInfo, "AMDGPUtti", + "AMDGPU Target Transform Info", true, true, false) +char AMDGPUTTI::ID = 0; + +ImmutablePass * +llvm::createAMDGPUTargetTransformInfoPass(const AMDGPUTargetMachine *TM) { + return new AMDGPUTTI(TM); +} + +bool AMDGPUTTI::hasBranchDivergence() const { return true; } |