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if it is not ultimately captured. Teach BasicAliasAnalysis that a local object address which does not escape and is never stored does not alias with a value resulting from a load. llvm-svn: 89398
34 lines
1.3 KiB
C++
34 lines
1.3 KiB
C++
//===----- llvm/Analysis/CaptureTracking.h - Pointer capture ----*- C++ -*-===//
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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 contains routines that help determine which pointers are captured.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_ANALYSIS_CAPTURETRACKING_H
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#define LLVM_ANALYSIS_CAPTURETRACKING_H
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namespace llvm {
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class Value;
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/// PointerMayBeCaptured - Return true if this pointer value may be captured
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/// by the enclosing function (which is required to exist). This routine can
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/// be expensive, so consider caching the results. The boolean ReturnCaptures
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/// specifies whether returning the value (or part of it) from the function
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/// counts as capturing it or not. The boolean StoreCaptures specified whether
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/// storing the value (or part of it) into memory anywhere automatically
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/// counts as capturing it or not.
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bool PointerMayBeCaptured(const Value *V,
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bool ReturnCaptures,
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bool StoreCaptures);
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} // end namespace llvm
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#endif
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