Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/Analysis/CaptureTracking.h b/linux-x64/clang/include/llvm/Analysis/CaptureTracking.h
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+//===----- llvm/Analysis/CaptureTracking.h - Pointer capture ----*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains routines that help determine which pointers are captured.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_CAPTURETRACKING_H
+#define LLVM_ANALYSIS_CAPTURETRACKING_H
+
+namespace llvm {
+
+ class Value;
+ class Use;
+ class Instruction;
+ class DominatorTree;
+ class OrderedBasicBlock;
+
+ /// PointerMayBeCaptured - Return true if this pointer value may be captured
+ /// by the enclosing function (which is required to exist). This routine can
+ /// be expensive, so consider caching the results. The boolean ReturnCaptures
+ /// specifies whether returning the value (or part of it) from the function
+ /// counts as capturing it or not. The boolean StoreCaptures specified
+ /// whether storing the value (or part of it) into memory anywhere
+ /// automatically counts as capturing it or not.
+ bool PointerMayBeCaptured(const Value *V,
+ bool ReturnCaptures,
+ bool StoreCaptures);
+
+ /// PointerMayBeCapturedBefore - Return true if this pointer value may be
+ /// captured by the enclosing function (which is required to exist). If a
+ /// DominatorTree is provided, only captures which happen before the given
+ /// instruction are considered. This routine can be expensive, so consider
+ /// caching the results. The boolean ReturnCaptures specifies whether
+ /// returning the value (or part of it) from the function counts as capturing
+ /// it or not. The boolean StoreCaptures specified whether storing the value
+ /// (or part of it) into memory anywhere automatically counts as capturing it
+ /// or not. Captures by the provided instruction are considered if the
+ /// final parameter is true. An ordered basic block in \p OBB could be used
+ /// to speed up capture-tracker queries.
+ bool PointerMayBeCapturedBefore(const Value *V, bool ReturnCaptures,
+ bool StoreCaptures, const Instruction *I,
+ DominatorTree *DT, bool IncludeI = false,
+ OrderedBasicBlock *OBB = nullptr);
+
+ /// This callback is used in conjunction with PointerMayBeCaptured. In
+ /// addition to the interface here, you'll need to provide your own getters
+ /// to see whether anything was captured.
+ struct CaptureTracker {
+ virtual ~CaptureTracker();
+
+ /// tooManyUses - The depth of traversal has breached a limit. There may be
+ /// capturing instructions that will not be passed into captured().
+ virtual void tooManyUses() = 0;
+
+ /// shouldExplore - This is the use of a value derived from the pointer.
+ /// To prune the search (ie., assume that none of its users could possibly
+ /// capture) return false. To search it, return true.
+ ///
+ /// U->getUser() is always an Instruction.
+ virtual bool shouldExplore(const Use *U);
+
+ /// captured - Information about the pointer was captured by the user of
+ /// use U. Return true to stop the traversal or false to continue looking
+ /// for more capturing instructions.
+ virtual bool captured(const Use *U) = 0;
+ };
+
+ /// PointerMayBeCaptured - Visit the value and the values derived from it and
+ /// find values which appear to be capturing the pointer value. This feeds
+ /// results into and is controlled by the CaptureTracker object.
+ void PointerMayBeCaptured(const Value *V, CaptureTracker *Tracker);
+} // end namespace llvm
+
+#endif