Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/Analysis/Trace.h b/linux-x64/clang/include/llvm/Analysis/Trace.h
new file mode 100644
index 0000000..b05d384
--- /dev/null
+++ b/linux-x64/clang/include/llvm/Analysis/Trace.h
@@ -0,0 +1,112 @@
+//===- llvm/Analysis/Trace.h - Represent one trace of LLVM code -*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This class represents a single trace of LLVM basic blocks. A trace is a
+// single entry, multiple exit, region of code that is often hot. Trace-based
+// optimizations treat traces almost like they are a large, strange, basic
+// block: because the trace path is assumed to be hot, optimizations for the
+// fall-through path are made at the expense of the non-fall-through paths.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_TRACE_H
+#define LLVM_ANALYSIS_TRACE_H
+
+#include <cassert>
+#include <vector>
+
+namespace llvm {
+
+class BasicBlock;
+class Function;
+class Module;
+class raw_ostream;
+
+class Trace {
+ using BasicBlockListType = std::vector<BasicBlock *>;
+
+ BasicBlockListType BasicBlocks;
+
+public:
+ /// Trace ctor - Make a new trace from a vector of basic blocks,
+ /// residing in the function which is the parent of the first
+ /// basic block in the vector.
+ Trace(const std::vector<BasicBlock *> &vBB) : BasicBlocks (vBB) {}
+
+ /// getEntryBasicBlock - Return the entry basic block (first block)
+ /// of the trace.
+ BasicBlock *getEntryBasicBlock () const { return BasicBlocks[0]; }
+
+ /// operator[]/getBlock - Return basic block N in the trace.
+ BasicBlock *operator[](unsigned i) const { return BasicBlocks[i]; }
+ BasicBlock *getBlock(unsigned i) const { return BasicBlocks[i]; }
+
+ /// getFunction - Return this trace's parent function.
+ Function *getFunction () const;
+
+ /// getModule - Return this Module that contains this trace's parent
+ /// function.
+ Module *getModule () const;
+
+ /// getBlockIndex - Return the index of the specified basic block in the
+ /// trace, or -1 if it is not in the trace.
+ int getBlockIndex(const BasicBlock *X) const {
+ for (unsigned i = 0, e = BasicBlocks.size(); i != e; ++i)
+ if (BasicBlocks[i] == X)
+ return i;
+ return -1;
+ }
+
+ /// contains - Returns true if this trace contains the given basic
+ /// block.
+ bool contains(const BasicBlock *X) const {
+ return getBlockIndex(X) != -1;
+ }
+
+ /// Returns true if B1 occurs before B2 in the trace, or if it is the same
+ /// block as B2.. Both blocks must be in the trace.
+ bool dominates(const BasicBlock *B1, const BasicBlock *B2) const {
+ int B1Idx = getBlockIndex(B1), B2Idx = getBlockIndex(B2);
+ assert(B1Idx != -1 && B2Idx != -1 && "Block is not in the trace!");
+ return B1Idx <= B2Idx;
+ }
+
+ // BasicBlock iterators...
+ using iterator = BasicBlockListType::iterator;
+ using const_iterator = BasicBlockListType::const_iterator;
+ using reverse_iterator = std::reverse_iterator<iterator>;
+ using const_reverse_iterator = std::reverse_iterator<const_iterator>;
+
+ iterator begin() { return BasicBlocks.begin(); }
+ const_iterator begin() const { return BasicBlocks.begin(); }
+ iterator end () { return BasicBlocks.end(); }
+ const_iterator end () const { return BasicBlocks.end(); }
+
+ reverse_iterator rbegin() { return BasicBlocks.rbegin(); }
+ const_reverse_iterator rbegin() const { return BasicBlocks.rbegin(); }
+ reverse_iterator rend () { return BasicBlocks.rend(); }
+ const_reverse_iterator rend () const { return BasicBlocks.rend(); }
+
+ unsigned size() const { return BasicBlocks.size(); }
+ bool empty() const { return BasicBlocks.empty(); }
+
+ iterator erase(iterator q) { return BasicBlocks.erase (q); }
+ iterator erase(iterator q1, iterator q2) { return BasicBlocks.erase (q1, q2); }
+
+ /// print - Write trace to output stream.
+ void print(raw_ostream &O) const;
+
+ /// dump - Debugger convenience method; writes trace to standard error
+ /// output stream.
+ void dump() const;
+};
+
+} // end namespace llvm
+
+#endif // LLVM_ANALYSIS_TRACE_H