Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/Analysis/CodeMetrics.h b/linux-x64/clang/include/llvm/Analysis/CodeMetrics.h
new file mode 100644
index 0000000..9e861ac
--- /dev/null
+++ b/linux-x64/clang/include/llvm/Analysis/CodeMetrics.h
@@ -0,0 +1,105 @@
+//===- CodeMetrics.h - Code cost measurements -------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements various weight measurements for code, helping
+// the Inliner and other passes decide whether to duplicate its contents.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_ANALYSIS_CODEMETRICS_H
+#define LLVM_ANALYSIS_CODEMETRICS_H
+
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/IR/CallSite.h"
+
+namespace llvm {
+class AssumptionCache;
+class BasicBlock;
+class Loop;
+class Function;
+class Instruction;
+class DataLayout;
+class TargetTransformInfo;
+class Value;
+
+/// \brief Check whether a call will lower to something small.
+///
+/// This tests checks whether this callsite will lower to something
+/// significantly cheaper than a traditional call, often a single
+/// instruction. Note that if isInstructionFree(CS.getInstruction()) would
+/// return true, so will this function.
+bool callIsSmall(ImmutableCallSite CS);
+
+/// \brief Utility to calculate the size and a few similar metrics for a set
+/// of basic blocks.
+struct CodeMetrics {
+ /// \brief True if this function contains a call to setjmp or other functions
+ /// with attribute "returns twice" without having the attribute itself.
+ bool exposesReturnsTwice = false;
+
+ /// \brief True if this function calls itself.
+ bool isRecursive = false;
+
+ /// \brief True if this function cannot be duplicated.
+ ///
+ /// True if this function contains one or more indirect branches, or it contains
+ /// one or more 'noduplicate' instructions.
+ bool notDuplicatable = false;
+
+ /// \brief True if this function contains a call to a convergent function.
+ bool convergent = false;
+
+ /// \brief True if this function calls alloca (in the C sense).
+ bool usesDynamicAlloca = false;
+
+ /// \brief Number of instructions in the analyzed blocks.
+ unsigned NumInsts = false;
+
+ /// \brief Number of analyzed blocks.
+ unsigned NumBlocks = false;
+
+ /// \brief Keeps track of basic block code size estimates.
+ DenseMap<const BasicBlock *, unsigned> NumBBInsts;
+
+ /// \brief Keep track of the number of calls to 'big' functions.
+ unsigned NumCalls = false;
+
+ /// \brief The number of calls to internal functions with a single caller.
+ ///
+ /// These are likely targets for future inlining, likely exposed by
+ /// interleaved devirtualization.
+ unsigned NumInlineCandidates = 0;
+
+ /// \brief How many instructions produce vector values.
+ ///
+ /// The inliner is more aggressive with inlining vector kernels.
+ unsigned NumVectorInsts = 0;
+
+ /// \brief How many 'ret' instructions the blocks contain.
+ unsigned NumRets = 0;
+
+ /// \brief Add information about a block to the current state.
+ void analyzeBasicBlock(const BasicBlock *BB, const TargetTransformInfo &TTI,
+ const SmallPtrSetImpl<const Value*> &EphValues);
+
+ /// \brief Collect a loop's ephemeral values (those used only by an assume
+ /// or similar intrinsics in the loop).
+ static void collectEphemeralValues(const Loop *L, AssumptionCache *AC,
+ SmallPtrSetImpl<const Value *> &EphValues);
+
+ /// \brief Collect a functions's ephemeral values (those used only by an
+ /// assume or similar intrinsics in the function).
+ static void collectEphemeralValues(const Function *L, AssumptionCache *AC,
+ SmallPtrSetImpl<const Value *> &EphValues);
+};
+
+}
+
+#endif