trans: Upgrade LLVM

This brings some routine upgrades to the bundled LLVM that we're using, the most
notable of which is a bug fix to the way we handle range asserts when loading
the discriminant of an enum. This fix ended up being very similar to f9d4149c
where we basically can't have a range assert when loading a discriminant due to
filling drop, and appropriate flags were added to communicate this to
`trans::adt`.

1 files changed, 19 insertions, 3 deletions

diff --git a/src/rustllvm/ArchiveWrapper.cpp b/src/rustllvm/ArchiveWrapper.cpp
index 2cf6277e057..d3f2907bfc3 100644
--- a/src/rustllvm/ArchiveWrapper.cpp
+++ b/src/rustllvm/ArchiveWrapper.cpp
@@ -24,7 +24,13 @@ struct LLVMRustArchiveMember {
   const char *name;
   Archive::Child child;
 
-  LLVMRustArchiveMember(): filename(NULL), name(NULL), child(NULL, NULL) {}
+  LLVMRustArchiveMember(): filename(NULL), name(NULL),
+#if LLVM_VERSION_MINOR >= 8
+    child(NULL, NULL, NULL)
+#else
+    child(NULL, NULL)
+#endif
+  {}
   ~LLVMRustArchiveMember() {}
 };
 
@@ -92,8 +98,18 @@ extern "C" const Archive::Child*
 LLVMRustArchiveIteratorNext(RustArchiveIterator *rai) {
     if (rai->cur == rai->end)
         return NULL;
-    const Archive::Child *cur = rai->cur.operator->();
-    Archive::Child *ret = new Archive::Child(*cur);
+#if LLVM_VERSION_MINOR >= 8
+    const ErrorOr<Archive::Child>* cur = rai->cur.operator->();
+    if (!*cur) {
+        LLVMRustSetLastError(cur->getError().message().c_str());
+        return NULL;
+    }
+    const Archive::Child &child = cur->get();
+#else
+    const Archive::Child &child = *rai->cur.operator->();
+#endif
+    Archive::Child *ret = new Archive::Child(child);
+
     ++rai->cur;
     return ret;
 }