Upgrade LLVM

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

Nice work to these guys!

configure

@@ -916,6 +916,10 @@ do
         LLVM_OPTS="$LLVM_OPTS --disable-terminfo"
         # Try to have LLVM pull in as few dependencies as possible (#9397)
         LLVM_OPTS="$LLVM_OPTS --disable-zlib --disable-libffi"
+        # LLVM says it needs a "new" clang/gcc, but we seem to get by ok with
+        # older versions on the bots. Get by for a little longer by asking it to
+        # not do version detection
+        LLVM_OPTS="$LLVM_OPTS --disable-compiler-version-checks"
 
         # Use win32 native thread/lock apis instead of pthread wrapper.
         # (llvm's configure tries to find pthread first, so we have to disable it explicitly.)

src/librustc/lib/llvm.rs

@@ -1762,6 +1762,8 @@ pub fn LLVMRustRunRestrictionPass(M: ModuleRef,
         pub fn LLVMRustArchiveReadSection(AR: ArchiveRef, name: *c_char,
                                           out_len: *mut size_t) -> *c_char;
         pub fn LLVMRustDestroyArchive(AR: ArchiveRef);
+
+        pub fn LLVMRustSetDLLExportStorageClass(V: ValueRef);
     }
 }
 

src/librustc/middle/trans/base.rs

@@ -2531,12 +2531,12 @@ pub fn decl_crate_map(sess: session::Session, mapmeta: LinkMeta,
             llvm::LLVMAddGlobal(llmod, maptype.to_ref(), buf)
         }
     });
+    lib::llvm::SetLinkage(map, lib::llvm::ExternalLinkage);
+
     // On windows we'd like to export the toplevel cratemap
     // such that we can find it from libstd.
     if targ_cfg.os == OsWin32 && is_top {
-        lib::llvm::SetLinkage(map, lib::llvm::DLLExportLinkage);
+        unsafe { llvm::LLVMRustSetDLLExportStorageClass(map) }
-    } else {
-        lib::llvm::SetLinkage(map, lib::llvm::ExternalLinkage);
     }
 
     return (sym_name, map);

src/llvm

@@ -1 +1 @@
-Subproject commit 535989a92ce1f6f6488c94a2c8f4ed438349f162
+Subproject commit e1dabb48f0f898d1a808b3de3a26f5ee3735c7dd

src/rustllvm/PassWrapper.cpp

@@ -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/RustWrapper.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;
+    ErrorOr<Module *> Src = llvm::getLazyBitcodeModule(buf, Dst->getContext());
-    Module *Src = llvm::getLazyBitcodeModule(buf, Dst->getContext(), &Err);
+    if (!Src) {
-    if (Src == NULL) {
+        LLVMRustError = Src.getError().message().c_str();
-        LLVMRustError = Err.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(),
+    for (Archive::child_iterator child = ar->child_begin(),
-                                   end = ar->end_children();
+                                   end = ar->child_end();
          child != end; ++child) {
         StringRef sect_name;
         error_code err = child->getName(sect_name);
@@ -589,3 +589,9 @@ extern "C" void
 LLVMRustDestroyArchive(Archive *ar) {
     delete ar;
 }
+
+extern "C" void
+LLVMRustSetDLLExportStorageClass(LLVMValueRef Value) {
+    GlobalValue *V = unwrap<GlobalValue>(Value);
+    V->setDLLStorageClass(GlobalValue::DLLExportStorageClass);
+}

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.
-2014-01-22
+2014-01-27

src/rustllvm/rustllvm.h

@@ -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"