1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit/MIRGraph.h b/js/src/jit/MIRGraph.h
index 18c0bf68a4..4de20a36fa 100644
--- a/js/src/jit/MIRGraph.h
+++ b/js/src/jit/MIRGraph.h
@@ -61,6 +61,9 @@ class MBasicBlock : public TempObject, public InlineListNode<MBasicBlock> {
   // This block will unconditionally bail out.
   bool alwaysBails_ = false;
 
+  // Will be used for branch hinting in wasm.
+  wasm::BranchHint branchHint_ = wasm::BranchHint::Invalid;
+
   // Pushes a copy of a local variable or argument.
   void pushVariable(uint32_t slot) { push(slots_[slot]); }
 
@@ -375,6 +378,15 @@ class MBasicBlock : public TempObject, public InlineListNode<MBasicBlock> {
   uint32_t id() const { return id_; }
   uint32_t numPredecessors() const { return predecessors_.length(); }
 
+  bool branchHintingUnlikely() const {
+    return branchHint_ == wasm::BranchHint::Unlikely;
+  }
+  bool branchHintingLikely() const {
+    return branchHint_ == wasm::BranchHint::Likely;
+  }
+
+  void setBranchHinting(wasm::BranchHint value) { branchHint_ = value; }
+
   uint32_t domIndex() const {
     MOZ_ASSERT(!isDead());
     return domIndex_;