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, 25 insertions, 25 deletions

diff --git a/contrib/llvm/lib/CodeGen/LLVMTargetMachine.cpp b/contrib/llvm/lib/CodeGen/LLVMTargetMachine.cpp
index 1a09837..ad2c553 100644
--- a/contrib/llvm/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/contrib/llvm/lib/CodeGen/LLVMTargetMachine.cpp
@@ -62,6 +62,17 @@ static bool getVerboseAsm() {
   llvm_unreachable("Invalid verbose asm state");
 }
 
+void LLVMTargetMachine::initAsmInfo() {
+  AsmInfo = TheTarget.createMCAsmInfo(*getRegisterInfo(), TargetTriple);
+  // TargetSelect.h moved to a different directory between LLVM 2.9 and 3.0,
+  // and if the old one gets included then MCAsmInfo will be NULL and
+  // we'll crash later.
+  // Provide the user with a useful error message about what's wrong.
+  assert(AsmInfo && "MCAsmInfo not initialized. "
+         "Make sure you include the correct TargetSelect.h"
+         "and that InitializeAllTargetMCs() is being invoked!");
+}
+
 LLVMTargetMachine::LLVMTargetMachine(const Target &T, StringRef Triple,
                                      StringRef CPU, StringRef FS,
                                      TargetOptions Options,
@@ -69,18 +80,10 @@ LLVMTargetMachine::LLVMTargetMachine(const Target &T, StringRef Triple,
                                      CodeGenOpt::Level OL)
   : TargetMachine(T, Triple, CPU, FS, Options) {
   CodeGenInfo = T.createMCCodeGenInfo(Triple, RM, CM, OL);
-  AsmInfo = T.createMCAsmInfo(Triple);
-  // TargetSelect.h moved to a different directory between LLVM 2.9 and 3.0,
-  // and if the old one gets included then MCAsmInfo will be NULL and
-  // we'll crash later.
-  // Provide the user with a useful error message about what's wrong.
-  assert(AsmInfo && "MCAsmInfo not initialized."
-         "Make sure you include the correct TargetSelect.h"
-         "and that InitializeAllTargetMCs() is being invoked!");
 }
 
 void LLVMTargetMachine::addAnalysisPasses(PassManagerBase &PM) {
-  PM.add(createBasicTargetTransformInfoPass(getTargetLowering()));
+  PM.add(createBasicTargetTransformInfoPass(this));
 }
 
 /// addPassesToX helper drives creation and initialization of TargetPassConfig.
@@ -112,7 +115,6 @@ static MCContext *addPassesToGenerateCode(LLVMTargetMachine *TM,
     new MachineModuleInfo(*TM->getMCAsmInfo(), *TM->getRegisterInfo(),
                           &TM->getTargetLowering()->getObjFileLowering());
   PM.add(MMI);
-  MCContext *Context = &MMI->getContext(); // Return the MCContext by-ref.
 
   // Set up a MachineFunction for the rest of CodeGen to work on.
   PM.add(new MachineFunctionAnalysis(*TM));
@@ -131,7 +133,7 @@ static MCContext *addPassesToGenerateCode(LLVMTargetMachine *TM,
 
   PassConfig->setInitialized();
 
-  return Context;
+  return &MMI->getContext();
 }
 
 bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
@@ -161,6 +163,7 @@ bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
 
   const MCAsmInfo &MAI = *getMCAsmInfo();
   const MCRegisterInfo &MRI = *getRegisterInfo();
+  const MCInstrInfo &MII = *getInstrInfo();
   const MCSubtargetInfo &STI = getSubtarget<MCSubtargetInfo>();
   OwningPtr<MCStreamer> AsmStreamer;
 
@@ -168,19 +171,15 @@ bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
   case CGFT_AssemblyFile: {
     MCInstPrinter *InstPrinter =
       getTarget().createMCInstPrinter(MAI.getAssemblerDialect(), MAI,
-                                      *getInstrInfo(),
-                                      Context->getRegisterInfo(), STI);
+                                      MII, MRI, STI);
 
     // Create a code emitter if asked to show the encoding.
     MCCodeEmitter *MCE = 0;
-    MCAsmBackend *MAB = 0;
-    if (ShowMCEncoding) {
-      const MCSubtargetInfo &STI = getSubtarget<MCSubtargetInfo>();
-      MCE = getTarget().createMCCodeEmitter(*getInstrInfo(), MRI, STI,
-                                            *Context);
-      MAB = getTarget().createMCAsmBackend(getTargetTriple(), TargetCPU);
-    }
+    if (ShowMCEncoding)
+      MCE = getTarget().createMCCodeEmitter(MII, MRI, STI, *Context);
 
+    MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(),
+                                                       TargetCPU);
     MCStreamer *S = getTarget().createAsmStreamer(*Context, Out,
                                                   getVerboseAsm(),
                                                   hasMCUseLoc(),
@@ -195,9 +194,9 @@ bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
   case CGFT_ObjectFile: {
     // Create the code emitter for the target if it exists.  If not, .o file
     // emission fails.
-    MCCodeEmitter *MCE = getTarget().createMCCodeEmitter(*getInstrInfo(), MRI,
-                                                         STI, *Context);
-    MCAsmBackend *MAB = getTarget().createMCAsmBackend(getTargetTriple(),
+    MCCodeEmitter *MCE = getTarget().createMCCodeEmitter(MII, MRI, STI,
+                                                         *Context);
+    MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(),
                                                        TargetCPU);
     if (MCE == 0 || MAB == 0)
       return true;
@@ -232,7 +231,7 @@ bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
 /// addPassesToEmitMachineCode - Add passes to the specified pass manager to
 /// get machine code emitted.  This uses a JITCodeEmitter object to handle
 /// actually outputting the machine code and resolving things like the address
-/// of functions.  This method should returns true if machine code emission is
+/// of functions.  This method should return true if machine code emission is
 /// not supported.
 ///
 bool LLVMTargetMachine::addPassesToEmitMachineCode(PassManagerBase &PM,
@@ -271,7 +270,8 @@ bool LLVMTargetMachine::addPassesToEmitMC(PassManagerBase &PM,
   const MCSubtargetInfo &STI = getSubtarget<MCSubtargetInfo>();
   MCCodeEmitter *MCE = getTarget().createMCCodeEmitter(*getInstrInfo(), MRI,
                                                        STI, *Ctx);
-  MCAsmBackend *MAB = getTarget().createMCAsmBackend(getTargetTriple(), TargetCPU);
+  MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(),
+                                                     TargetCPU);
   if (MCE == 0 || MAB == 0)
     return true;