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base which it adds a single analysis pass to, to instead return the type erased TargetTransformInfo object constructed for that TargetMachine. This removes all of the pass variants for TTI. There is now a single TTI *pass* in the Analysis layer. All of the Analysis <-> Target communication is through the TTI's type erased interface itself. While the diff is large here, it is nothing more that code motion to make types available in a header file for use in a different source file within each target. I've tried to keep all the doxygen comments and file boilerplate in line with this move, but let me know if I missed anything. With this in place, the next step to making TTI work with the new pass manager is to introduce a really simple new-style analysis that produces a TTI object via a callback into this routine on the target machine. Once we have that, we'll have the building blocks necessary to accept a function argument as well. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227685 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
1.5 KiB
C++
37 lines
1.5 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) : BaseT(TM) {}
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