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39 lines
1.5 KiB
C++
39 lines
1.5 KiB
C++
//===- RSProfiling.cpp - Various profiling using random sampling ----------===//
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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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//
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// This file defines the abstract interface that a profiler must implement to
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// support the random profiling transform.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TRANSFORMS_RSPROFILING_H
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#define LLVM_TRANSFORMS_RSPROFILING_H
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namespace llvm {
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//===--------------------------------------------------------------------===//
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/// RSProfilers - The basic Random Sampling Profiler Interface Any profiler
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/// that implements this interface can be transformed by the random sampling
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/// pass to be sample based rather than always on.
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///
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/// The only exposed function can be queried to find out if an instruction
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/// was original or if it was inserted by the profiler. Implementations of
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/// this interface are expected to chain to other implementations, such that
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/// multiple profilers can be support simultaniously.
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struct RSProfilers : public ModulePass {
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static char ID; // Pass identification, replacement for typeinfo
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RSProfilers() : ModulePass((intptr_t)&ID) {}
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/// isProfiling - This method returns true if the value passed it was
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/// inserted by the profiler.
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virtual bool isProfiling(Value* v) = 0;
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};
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}
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#endif
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