Upgrade LLVM

This upgrade brings commit by @eddyb to help optimizations of virtual calls in
a few places (llvm-mirror/llvm@6d2bd95) as well as a
commit by @c-a to *greatly* improve the runtime of the optimization passes
(rust-lang/llvm#3).

Nice work to these guys!

Author: alexcrichton

src/llvm

@@ -185,7 +185,7 @@ LLVMRustPrintModule(LLVMPassManagerRef PMR,
   std::string ErrorInfo;
   raw_fd_ostream OS(path, ErrorInfo, sys::fs::F_Binary);
   formatted_raw_ostream FOS(OS);
-  PM->add(createPrintModulePass(&FOS));
+  PM->add(createPrintModulePass(FOS));
   PM->run(*unwrap(M));
 }
 

src/rustllvm/PassWrapper.cpp

@@ -537,15 +537,15 @@ extern "C" bool
 LLVMRustLinkInExternalBitcode(LLVMModuleRef dst, char *bc, size_t len) {
     Module *Dst = unwrap(dst);
     MemoryBuffer* buf = MemoryBuffer::getMemBufferCopy(StringRef(bc, len));
-    std::string Err;
-    Module *Src = llvm::getLazyBitcodeModule(buf, Dst->getContext(), &Err);
-    if (Src == NULL) {
-        LLVMRustError = Err.c_str();
+    ErrorOr<Module *> Src = llvm::getLazyBitcodeModule(buf, Dst->getContext());
+    if (!Src) {
+        LLVMRustError = Src.getError().message().c_str();
         delete buf;
         return false;
     }
 
-    if (Linker::LinkModules(Dst, Src, Linker::DestroySource, &Err)) {
+    std::string Err;
+    if (Linker::LinkModules(Dst, *Src, Linker::DestroySource, &Err)) {
         LLVMRustError = Err.c_str();
         return false;
     }
@@ -570,8 +570,8 @@ LLVMRustOpenArchive(char *path) {
 
 extern "C" const char*
 LLVMRustArchiveReadSection(Archive *ar, char *name, size_t *size) {
-    for (Archive::child_iterator child = ar->begin_children(),
-                                   end = ar->end_children();
+    for (Archive::child_iterator child = ar->child_begin(),
+                                   end = ar->child_end();
          child != end; ++child) {
         StringRef sect_name;
         error_code err = child->getName(sect_name);

src/rustllvm/RustWrapper.cpp

@@ -1,4 +1,4 @@
 # If this file is modified, then llvm will be forcibly cleaned and then rebuilt.
 # The actual contents of this file do not matter, but to trigger a change on the
 # build bots then the contents should be changed so git updates the mtime.
-2014-01-22
+2014-01-27

src/rustllvm/llvm-auto-clean-trigger

@@ -16,14 +16,12 @@
 #include "llvm/PassManager.h"
 #include "llvm/IR/InlineAsm.h"
 #include "llvm/IR/LLVMContext.h"
-#include "llvm/Analysis/Verifier.h"
+#include "llvm/IR/IRPrintingPasses.h"
 #include "llvm/Analysis/Passes.h"
 #include "llvm/Analysis/Lint.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/ADT/DenseSet.h"
-#include "llvm/Assembly/Parser.h"
-#include "llvm/Assembly/PrintModulePass.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/FormattedStream.h"
 #include "llvm/Support/Timer.h"