Update LLVM

To fix #8106, we need an LLVM version that contains r211082 aka 0dee6756
which fixes a bug that blocks that issue.

There have been some tiny API changes in LLVM, and cmpxchg changed its
return type. The i1 part of the new return type is only interesting when
using the new weak cmpxchg, which we don't do.

src/librustc/middle/trans/intrinsic.rs

@@ -235,11 +235,15 @@ pub fn trans_intrinsic(ccx: &CrateContext,
                     lib::llvm::SequentiallyConsistent =>
                         lib::llvm::SequentiallyConsistent,
                 };
-                let old = AtomicCmpXchg(bcx, get_param(decl, first_real_arg),
+                let res = AtomicCmpXchg(bcx, get_param(decl, first_real_arg),
                                         get_param(decl, first_real_arg + 1u),
                                         get_param(decl, first_real_arg + 2u),
                                         order, strongest_failure_ordering);
-                Ret(bcx, old);
+                if unsafe { lib::llvm::llvm::LLVMVersionMinor() >= 5 } {
+                    Ret(bcx, ExtractValue(bcx, res, 0));
+                } else {
+                    Ret(bcx, res);
+                }
             }
             "load" => {
                 let old = AtomicLoad(bcx, get_param(decl, first_real_arg),

src/llvm

@@ -1 +1 @@
-Subproject commit 0a894645cf120539876e9eb4eb0d7b572dfa9d14
+Subproject commit 1bba09755d95892bc826c558630e93803b0a4ee6

src/rustllvm/RustWrapper.cpp

@@ -659,7 +659,7 @@ LLVMRustLinkInExternalBitcode(LLVMModuleRef dst, char *bc, size_t len) {
 extern "C" void*
 LLVMRustOpenArchive(char *path) {
     std::unique_ptr<MemoryBuffer> buf;
-    error_code err = MemoryBuffer::getFile(path, buf);
+    std::error_code err = MemoryBuffer::getFile(path, buf);
     if (err) {
         LLVMRustSetLastError(err.message().c_str());
         return NULL;
@@ -694,14 +694,18 @@ LLVMRustArchiveReadSection(Archive *ar, char *name, size_t *size) {
 #if LLVM_VERSION_MINOR >= 5
     Archive::child_iterator child = ar->child_begin(),
                               end = ar->child_end();
+    for (; child != end; ++child) {
+        ErrorOr<StringRef> name_or_err = child->getName();
+        if (name_or_err.getError()) continue;
+        StringRef sect_name = name_or_err.get();
 #else
     Archive::child_iterator child = ar->begin_children(),
                               end = ar->end_children();
-#endif
     for (; child != end; ++child) {
         StringRef sect_name;
         error_code err = child->getName(sect_name);
         if (err) continue;
+#endif
         if (sect_name.trim(" ") == name) {
             StringRef buf = child->getBuffer();
             *size = buf.size();
@@ -757,7 +761,11 @@ inline section_iterator *unwrap(LLVMSectionIteratorRef SI) {
 extern "C" int
 LLVMRustGetSectionName(LLVMSectionIteratorRef SI, const char **ptr) {
     StringRef ret;
+#if LLVM_VERSION_MINOR >= 5
+    if (std::error_code ec = (*unwrap(SI))->getName(ret))
+#else
     if (error_code ec = (*unwrap(SI))->getName(ret))
+#endif
       report_fatal_error(ec.message());
     *ptr = ret.data();
     return ret.size();

src/rustllvm/llvm-auto-clean-trigger

@@ -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.
-2014-05-20
+2014-06-20.2