1 files changed, 1 insertions, 9 deletions
diff --git a/js/src/jit/MIR.h b/js/src/jit/MIR.h
index af0abc695..81662a9be 100644
--- a/js/src/jit/MIR.h
+++ b/js/src/jit/MIR.h
@@ -8102,11 +8102,9 @@ class MDefFun
 class MRegExp : public MNullaryInstruction
 {
     CompilerGCPointer<RegExpObject*> source_;
-    bool mustClone_;
 
     MRegExp(CompilerConstraintList* constraints, RegExpObject* source)
-      : source_(source),
-        mustClone_(true)
+      : source_(source)
     {
         setResultType(MIRType::Object);
         setResultTypeSet(MakeSingletonTypeSet(constraints, source));
@@ -8116,12 +8114,6 @@ class MRegExp : public MNullaryInstruction
     INSTRUCTION_HEADER(RegExp)
     TRIVIAL_NEW_WRAPPERS
 
-    void setDoNotClone() {
-        mustClone_ = false;
-    }
-    bool mustClone() const {
-        return mustClone_;
-    }
     RegExpObject* source() const {
         return source_;
     }