Upgrade our copy of clang and llvm to 3.5.1 release. This is a bugfix

only release, no new features have been added.

Please note that this version requires C++11 support to build; see
UPDATING for more information.

Release notes for llvm and clang can be found here:
<http://llvm.org/releases/3.5.1/docs/ReleaseNotes.html>
<http://llvm.org/releases/3.5.1/tools/clang/docs/ReleaseNotes.html>

MFC after:	1 month
X-MFC-With:	276479

1 files changed, 22 insertions, 0 deletions

diff --git a/contrib/llvm/patches/patch-10-llvm-r222562-loop-rotate.diff b/contrib/llvm/patches/patch-10-llvm-r222562-loop-rotate.diff
new file mode 100644
index 0000000..bc09f27
--- /dev/null
+++ b/contrib/llvm/patches/patch-10-llvm-r222562-loop-rotate.diff
@@ -0,0 +1,22 @@
+Pull in r222562 from upstream llvm trunk (by Roman Divacky):
+
+  Disable header duplication at -Oz in loop-rotate pass.
+
+This helps to minimize the size of boot2.
+
+Introduced here: http://svnweb.freebsd.org/changeset/base/274968
+
+Index: lib/Transforms/IPO/PassManagerBuilder.cpp
+===================================================================
+--- lib/Transforms/IPO/PassManagerBuilder.cpp
++++ lib/Transforms/IPO/PassManagerBuilder.cpp
+@@ -195,7 +195,8 @@ void PassManagerBuilder::populateModulePassManager
+     MPM.add(createTailCallEliminationPass()); // Eliminate tail calls
+   MPM.add(createCFGSimplificationPass());     // Merge & remove BBs
+   MPM.add(createReassociatePass());           // Reassociate expressions
+-  MPM.add(createLoopRotatePass());            // Rotate Loop
++  // Rotate Loop - disable header duplication at -Oz
++  MPM.add(createLoopRotatePass(SizeLevel == 2 ? 0 : -1));
+   MPM.add(createLICMPass());                  // Hoist loop invariants
+   MPM.add(createLoopUnswitchPass(SizeLevel || OptLevel < 3));
+   MPM.add(createInstructionCombiningPass());