diff options
Diffstat (limited to 'contrib/llvm/lib/Target/R600/AMDGPUTargetTransformInfo.cpp')
-rw-r--r-- | contrib/llvm/lib/Target/R600/AMDGPUTargetTransformInfo.cpp | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/contrib/llvm/lib/Target/R600/AMDGPUTargetTransformInfo.cpp b/contrib/llvm/lib/Target/R600/AMDGPUTargetTransformInfo.cpp deleted file mode 100644 index 6dacc74..0000000 --- a/contrib/llvm/lib/Target/R600/AMDGPUTargetTransformInfo.cpp +++ /dev/null @@ -1,82 +0,0 @@ -//===-- 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. -// -//===----------------------------------------------------------------------===// - -#include "AMDGPUTargetTransformInfo.h" -#include "llvm/Analysis/LoopInfo.h" -#include "llvm/Analysis/TargetTransformInfo.h" -#include "llvm/Analysis/ValueTracking.h" -#include "llvm/CodeGen/BasicTTIImpl.h" -#include "llvm/IR/Module.h" -#include "llvm/Support/Debug.h" -#include "llvm/Target/CostTable.h" -#include "llvm/Target/TargetLowering.h" -using namespace llvm; - -#define DEBUG_TYPE "AMDGPUtti" - -void AMDGPUTTIImpl::getUnrollingPreferences(Loop *L, - TTI::UnrollingPreferences &UP) { - UP.Threshold = 300; // Twice the default. - UP.MaxCount = UINT_MAX; - UP.Partial = true; - - // TODO: Do we want runtime unrolling? - - for (const BasicBlock *BB : L->getBlocks()) { - const DataLayout &DL = BB->getModule()->getDataLayout(); - for (const Instruction &I : *BB) { - const GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(&I); - if (!GEP || GEP->getAddressSpace() != AMDGPUAS::PRIVATE_ADDRESS) - continue; - - const Value *Ptr = GEP->getPointerOperand(); - const AllocaInst *Alloca = - dyn_cast<AllocaInst>(GetUnderlyingObject(Ptr, DL)); - if (Alloca) { - // We want to do whatever we can to limit the number of alloca - // instructions that make it through to the code generator. allocas - // require us to use indirect addressing, which is slow and prone to - // compiler bugs. If this loop does an address calculation on an - // alloca ptr, then we want to use a higher than normal loop unroll - // threshold. This will give SROA a better chance to eliminate these - // allocas. - // - // Don't use the maximum allowed value here as it will make some - // programs way too big. - UP.Threshold = 800; - } - } - } -} - -unsigned AMDGPUTTIImpl::getNumberOfRegisters(bool Vec) { - if (Vec) - return 0; - - // Number of VGPRs on SI. - if (ST->getGeneration() >= AMDGPUSubtarget::SOUTHERN_ISLANDS) - return 256; - - return 4 * 128; // XXX - 4 channels. Should these count as vector instead? -} - -unsigned AMDGPUTTIImpl::getRegisterBitWidth(bool) { return 32; } - -unsigned AMDGPUTTIImpl::getMaxInterleaveFactor(unsigned VF) { - // Semi-arbitrary large amount. - return 64; -} |