MFC 261991:

Upgrade our copy of llvm/clang to 3.4 release.  This version supports
all of the features in the current working draft of the upcoming C++
standard, provisionally named C++1y.

The code generator's performance is greatly increased, and the loop
auto-vectorizer is now enabled at -Os and -O2 in addition to -O3.  The
PowerPC backend has made several major improvements to code generation
quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ
backends have all seen major feature work.

Release notes for llvm and clang can be found here:
<http://llvm.org/releases/3.4/docs/ReleaseNotes.html>
<http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html>

MFC 262121 (by emaste):

Update lldb for clang/llvm 3.4 import

This commit largely restores the lldb source to the upstream r196259
snapshot with the addition of threaded inferior support and a few bug
fixes.

Specific upstream lldb revisions restored include:
   SVN      git
  181387  779e6ac
  181703  7bef4e2
  182099  b31044e
  182650  f2dcf35
  182683  0d91b80
  183862  15c1774
  183929  99447a6
  184177  0b2934b
  184948  4dc3761
  184954  007e7bc
  186990  eebd175

Sponsored by:	DARPA, AFRL

MFC 262186 (by emaste):

Fix mismerge in r262121

A break statement was lost in the merge.  The error had no functional
impact, but restore it to reduce the diff against upstream.

MFC 262303:

Pull in r197521 from upstream clang trunk (by rdivacky):

  Use the integrated assembler by default on FreeBSD/ppc and ppc64.

Requested by:	jhibbits

MFC 262611:

Pull in r196874 from upstream llvm trunk:

  Fix a crash that occurs when PWD is invalid.

  MCJIT needs to be able to run in hostile environments, even when PWD
  is invalid. There's no need to crash MCJIT in this case.

  The obvious fix is to simply leave MCContext's CompilationDir empty
  when PWD can't be determined. This way, MCJIT clients,
  and other clients that link with LLVM don't need a valid working directory.

  If we do want to guarantee valid CompilationDir, that should be done
  only for clients of getCompilationDir(). This is as simple as checking
  for an empty string.

  The only current use of getCompilationDir is EmitGenDwarfInfo, which
  won't conceivably run with an invalid working dir. However, in the
  purely hypothetically and untestable case that this happens, the
  AT_comp_dir will be omitted from the compilation_unit DIE.

This should help fix assertions occurring with ports-mgmt/tinderbox,
when it is using jails, and sometimes invalidates clang's current
working directory.

Reported by:	decke

MFC 262809:

Pull in r203007 from upstream clang trunk:

  Don't produce an alias between destructors with different calling conventions.

  Fixes pr19007.

(Please note that is an LLVM PR identifier, not a FreeBSD one.)

This should fix Firefox and/or libxul crashes (due to problems with
regparm/stdcall calling conventions) on i386.

Reported by:	multiple users on freebsd-current
PR:		bin/187103

MFC 263048:

Repair recognition of "CC" as an alias for the C++ compiler, since it
was silently broken by upstream for a Windows-specific use-case.

Apparently some versions of CMake still rely on this archaic feature...

Reported by:	rakuco

MFC 263049:

Garbage collect the old way of adding the libstdc++ include directories
in clang's InitHeaderSearch.cpp.  This has been superseded by David
Chisnall's commit in r255321.

Moreover, if libc++ is used, the libstdc++ include directories should
not be in the search path at all.  These directories are now only used
if you pass -stdlib=libstdc++.

1 files changed, 0 insertions, 267 deletions

diff --git a/contrib/llvm/lib/Analysis/ProfileInfoLoaderPass.cpp b/contrib/llvm/lib/Analysis/ProfileInfoLoaderPass.cpp
deleted file mode 100644
index 346f8d6..0000000
--- a/contrib/llvm/lib/Analysis/ProfileInfoLoaderPass.cpp
+++ /dev/null
@@ -1,267 +0,0 @@
-//===- ProfileInfoLoaderPass.cpp - LLVM Pass to load profile info ---------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements a concrete implementation of profiling information that
-// loads the information from a profile dump file.
-//
-//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "profile-loader"
-#include "llvm/Analysis/Passes.h"
-#include "llvm/ADT/SmallSet.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/Analysis/ProfileInfo.h"
-#include "llvm/Analysis/ProfileInfoLoader.h"
-#include "llvm/IR/BasicBlock.h"
-#include "llvm/IR/InstrTypes.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Pass.h"
-#include "llvm/Support/CFG.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/Format.h"
-#include "llvm/Support/raw_ostream.h"
-#include <set>
-using namespace llvm;
-
-STATISTIC(NumEdgesRead, "The # of edges read.");
-
-static cl::opt<std::string>
-ProfileInfoFilename("profile-info-file", cl::init("llvmprof.out"),
-                    cl::value_desc("filename"),
-                    cl::desc("Profile file loaded by -profile-loader"));
-
-namespace {
-  class LoaderPass : public ModulePass, public ProfileInfo {
-    std::string Filename;
-    std::set<Edge> SpanningTree;
-    std::set<const BasicBlock*> BBisUnvisited;
-    unsigned ReadCount;
-  public:
-    static char ID; // Class identification, replacement for typeinfo
-    explicit LoaderPass(const std::string &filename = "")
-      : ModulePass(ID), Filename(filename) {
-      initializeLoaderPassPass(*PassRegistry::getPassRegistry());
-      if (filename.empty()) Filename = ProfileInfoFilename;
-    }
-
-    virtual void getAnalysisUsage(AnalysisUsage &AU) const {
-      AU.setPreservesAll();
-    }
-
-    virtual const char *getPassName() const {
-      return "Profiling information loader";
-    }
-
-    // recurseBasicBlock() - Calculates the edge weights for as much basic
-    // blocks as possbile.
-    virtual void recurseBasicBlock(const BasicBlock *BB);
-    virtual void readEdgeOrRemember(Edge, Edge&, unsigned &, double &);
-    virtual void readEdge(ProfileInfo::Edge, std::vector<unsigned>&);
-
-    /// getAdjustedAnalysisPointer - This method is used when a pass implements
-    /// an analysis interface through multiple inheritance.  If needed, it
-    /// should override this to adjust the this pointer as needed for the
-    /// specified pass info.
-    virtual void *getAdjustedAnalysisPointer(AnalysisID PI) {
-      if (PI == &ProfileInfo::ID)
-        return (ProfileInfo*)this;
-      return this;
-    }
-    
-    /// run - Load the profile information from the specified file.
-    virtual bool runOnModule(Module &M);
-  };
-}  // End of anonymous namespace
-
-char LoaderPass::ID = 0;
-INITIALIZE_AG_PASS(LoaderPass, ProfileInfo, "profile-loader",
-              "Load profile information from llvmprof.out", false, true, false)
-
-char &llvm::ProfileLoaderPassID = LoaderPass::ID;
-
-ModulePass *llvm::createProfileLoaderPass() { return new LoaderPass(); }
-
-/// createProfileLoaderPass - This function returns a Pass that loads the
-/// profiling information for the module from the specified filename, making it
-/// available to the optimizers.
-Pass *llvm::createProfileLoaderPass(const std::string &Filename) {
-  return new LoaderPass(Filename);
-}
-
-void LoaderPass::readEdgeOrRemember(Edge edge, Edge &tocalc, 
-                                    unsigned &uncalc, double &count) {
-  double w;
-  if ((w = getEdgeWeight(edge)) == MissingValue) {
-    tocalc = edge;
-    uncalc++;
-  } else {
-    count+=w;
-  }
-}
-
-// recurseBasicBlock - Visits all neighbours of a block and then tries to
-// calculate the missing edge values.
-void LoaderPass::recurseBasicBlock(const BasicBlock *BB) {
-
-  // break recursion if already visited
-  if (BBisUnvisited.find(BB) == BBisUnvisited.end()) return;
-  BBisUnvisited.erase(BB);
-  if (!BB) return;
-
-  for (succ_const_iterator bbi = succ_begin(BB), bbe = succ_end(BB);
-       bbi != bbe; ++bbi) {
-    recurseBasicBlock(*bbi);
-  }
-  for (const_pred_iterator bbi = pred_begin(BB), bbe = pred_end(BB);
-       bbi != bbe; ++bbi) {
-    recurseBasicBlock(*bbi);
-  }
-
-  Edge tocalc;
-  if (CalculateMissingEdge(BB, tocalc)) {
-    SpanningTree.erase(tocalc);
-  }
-}
-
-void LoaderPass::readEdge(ProfileInfo::Edge e,
-                          std::vector<unsigned> &ECs) {
-  if (ReadCount < ECs.size()) {
-    double weight = ECs[ReadCount++];
-    if (weight != ProfileInfoLoader::Uncounted) {
-      // Here the data realm changes from the unsigned of the file to the
-      // double of the ProfileInfo. This conversion is save because we know
-      // that everything thats representable in unsinged is also representable
-      // in double.
-      EdgeInformation[getFunction(e)][e] += (double)weight;
-
-      DEBUG(dbgs() << "--Read Edge Counter for " << e
-                   << " (# "<< (ReadCount-1) << "): "
-                   << (unsigned)getEdgeWeight(e) << "\n");
-    } else {
-      // This happens only if reading optimal profiling information, not when
-      // reading regular profiling information.
-      SpanningTree.insert(e);
-    }
-  }
-}
-
-bool LoaderPass::runOnModule(Module &M) {
-  ProfileInfoLoader PIL("profile-loader", Filename);
-
-  EdgeInformation.clear();
-  std::vector<unsigned> Counters = PIL.getRawEdgeCounts();
-  if (Counters.size() > 0) {
-    ReadCount = 0;
-    for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
-      if (F->isDeclaration()) continue;
-      DEBUG(dbgs() << "Working on " << F->getName() << "\n");
-      readEdge(getEdge(0,&F->getEntryBlock()), Counters);
-      for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
-        TerminatorInst *TI = BB->getTerminator();
-        for (unsigned s = 0, e = TI->getNumSuccessors(); s != e; ++s) {
-          readEdge(getEdge(BB,TI->getSuccessor(s)), Counters);
-        }
-      }
-    }
-    if (ReadCount != Counters.size()) {
-      errs() << "WARNING: profile information is inconsistent with "
-             << "the current program!\n";
-    }
-    NumEdgesRead = ReadCount;
-  }
-
-  Counters = PIL.getRawOptimalEdgeCounts();
-  if (Counters.size() > 0) {
-    ReadCount = 0;
-    for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
-      if (F->isDeclaration()) continue;
-      DEBUG(dbgs() << "Working on " << F->getName() << "\n");
-      readEdge(getEdge(0,&F->getEntryBlock()), Counters);
-      for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
-        TerminatorInst *TI = BB->getTerminator();
-        if (TI->getNumSuccessors() == 0) {
-          readEdge(getEdge(BB,0), Counters);
-        }
-        for (unsigned s = 0, e = TI->getNumSuccessors(); s != e; ++s) {
-          readEdge(getEdge(BB,TI->getSuccessor(s)), Counters);
-        }
-      }
-      while (SpanningTree.size() > 0) {
-
-        unsigned size = SpanningTree.size();
-
-        BBisUnvisited.clear();
-        for (std::set<Edge>::iterator ei = SpanningTree.begin(),
-             ee = SpanningTree.end(); ei != ee; ++ei) {
-          BBisUnvisited.insert(ei->first);
-          BBisUnvisited.insert(ei->second);
-        }
-        while (BBisUnvisited.size() > 0) {
-          recurseBasicBlock(*BBisUnvisited.begin());
-        }
-
-        if (SpanningTree.size() == size) {
-          DEBUG(dbgs()<<"{");
-          for (std::set<Edge>::iterator ei = SpanningTree.begin(),
-               ee = SpanningTree.end(); ei != ee; ++ei) {
-            DEBUG(dbgs()<< *ei <<",");
-          }
-          assert(0 && "No edge calculated!");
-        }
-
-      }
-    }
-    if (ReadCount != Counters.size()) {
-      errs() << "WARNING: profile information is inconsistent with "
-             << "the current program!\n";
-    }
-    NumEdgesRead = ReadCount;
-  }
-
-  BlockInformation.clear();
-  Counters = PIL.getRawBlockCounts();
-  if (Counters.size() > 0) {
-    ReadCount = 0;
-    for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
-      if (F->isDeclaration()) continue;
-      for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB)
-        if (ReadCount < Counters.size())
-          // Here the data realm changes from the unsigned of the file to the
-          // double of the ProfileInfo. This conversion is save because we know
-          // that everything thats representable in unsinged is also
-          // representable in double.
-          BlockInformation[F][BB] = (double)Counters[ReadCount++];
-    }
-    if (ReadCount != Counters.size()) {
-      errs() << "WARNING: profile information is inconsistent with "
-             << "the current program!\n";
-    }
-  }
-
-  FunctionInformation.clear();
-  Counters = PIL.getRawFunctionCounts();
-  if (Counters.size() > 0) {
-    ReadCount = 0;
-    for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
-      if (F->isDeclaration()) continue;
-      if (ReadCount < Counters.size())
-        // Here the data realm changes from the unsigned of the file to the
-        // double of the ProfileInfo. This conversion is save because we know
-        // that everything thats representable in unsinged is also
-        // representable in double.
-        FunctionInformation[F] = (double)Counters[ReadCount++];
-    }
-    if (ReadCount != Counters.size()) {
-      errs() << "WARNING: profile information is inconsistent with "
-             << "the current program!\n";
-    }
-  }
-
-  return false;
-}