Imported Upstream version 6.4.0.137

Former-commit-id: 943baa9f16a098c33e129777827f3a9d20da00d6

external/llvm/include/llvm/CodeGen/GCs.h

@@ -24,6 +24,9 @@ class GCMetadataPrinter;
 /// Creates a CoreCLR-compatible garbage collector.
 void linkCoreCLRGC();
 
+/// Creates a Mono-compatible garbage collector.
+void linkMonoGC();
+
 /// Creates an ocaml-compatible garbage collector.
 void linkOcamlGC();
 

external/llvm/include/llvm/CodeGen/LinkAllCodegenComponents.h

@@ -37,6 +37,7 @@ namespace {
       (void) llvm::createDefaultPBQPRegisterAllocator();
 
       llvm::linkCoreCLRGC();
+      llvm::linkMonoGC();
       llvm::linkOcamlGC();
       llvm::linkErlangGC();
       llvm::linkShadowStackGC();

external/llvm/include/llvm/CodeGen/MachineBasicBlock.h

@@ -449,6 +449,13 @@ public:
   /// Replace successor OLD with NEW and update probability info.
   void replaceSuccessor(MachineBasicBlock *Old, MachineBasicBlock *New);
 
+  /// Copy a successor (and any probability info) from original block to this
+  /// block's. Uses an iterator into the original blocks successors.
+  ///
+  /// This is useful when doing a partial clone of successors. Afterward, the
+  /// probabilities may need to be normalized.
+  void copySuccessor(MachineBasicBlock *Orig, succ_iterator I);
+
   /// Transfers all the successors from MBB to this machine basic block (i.e.,
   /// copies all the successors FromMBB and remove all the successors from
   /// FromMBB).

external/llvm/include/llvm/IR/IntrinsicsPowerPC.td

@@ -36,8 +36,12 @@ let TargetPrefix = "ppc" in {  // All intrinsics start with "llvm.ppc.".
 
   // Intrinsics used to generate ctr-based loops. These should only be
   // generated by the PowerPC backend!
+  // The branch intrinsic is marked as NoDuplicate because loop rotation will
+  // attempt to duplicate it forming loops where a block reachable from one
+  // instance of it can contain another.
   def int_ppc_mtctr : Intrinsic<[], [llvm_anyint_ty], []>;
-  def int_ppc_is_decremented_ctr_nonzero : Intrinsic<[llvm_i1_ty], [], []>;
+  def int_ppc_is_decremented_ctr_nonzero :
+    Intrinsic<[llvm_i1_ty], [], [IntrNoDuplicate]>;
 
   // Intrinsics for [double]word extended forms of divide instructions
   def int_ppc_divwe : GCCBuiltin<"__builtin_divwe">,