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d0bfb83efb
intermediate TTI implementation template and instead query up to the derived class for both the TargetMachine and the TargetLowering. Most of the derived types had a TLI cached already and there is no need to store a less precisely typed target machine pointer. This will in turn make it much cleaner to look up the TLI via a per-function subtarget instead of the generic subtarget, and it will pave the way toward pulling the subtarget used for unroll preferences into the same form once we are *always* using the function to look up the correct subtarget. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227737 91177308-0d34-0410-b5e6-96231b3b80d8
38 lines
1.6 KiB
C++
38 lines
1.6 KiB
C++
//===- BasicTargetTransformInfo.cpp - Basic target-independent TTI impl ---===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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/// \file
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/// This file provides the implementation of a basic TargetTransformInfo pass
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/// predicated on the target abstractions present in the target independent
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/// code generator. It uses these (primarily TargetLowering) to model as much
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/// of the TTI query interface as possible. It is included by most targets so
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/// that they can specialize only a small subset of the query space.
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///
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/BasicTTIImpl.h"
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/Analysis/LoopInfo.h"
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#include "llvm/Analysis/TargetTransformInfo.h"
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#include "llvm/Analysis/TargetTransformInfoImpl.h"
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#include "llvm/Support/CommandLine.h"
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#include <utility>
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using namespace llvm;
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#define DEBUG_TYPE "basictti"
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// This flag is used by the template base class for BasicTTIImpl, and here to
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// provide a definition.
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cl::opt<unsigned>
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llvm::PartialUnrollingThreshold("partial-unrolling-threshold", cl::init(0),
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cl::desc("Threshold for partial unrolling"),
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cl::Hidden);
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BasicTTIImpl::BasicTTIImpl(const TargetMachine *TM)
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: BaseT(TM), TM(TM), TLI(TM->getSubtargetImpl()->getTargetLowering()) {}
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