Subzero: Randomize immediates by constant blinding or pooling.

src/IceGlobalContext.h

Index: src/IceGlobalContext.h
diff --git a/src/IceGlobalContext.h b/src/IceGlobalContext.h
index b67a232fc658770fb49b580f99add84c23812346..a41edc8abd0cb67edb7b243a8cc5b190edd7706b 100644
--- a/src/IceGlobalContext.h
+++ b/src/IceGlobalContext.h
@@ -85,10 +85,17 @@ public:
   Constant *getConstantUndef(Type Ty);
   // Returns a zero value.
   Constant *getConstantZero(Type Ty);
+
+  // Adds the given constant to the list of pooled immediates.
+  void addConstantPooledImmediate(const IceString &Name, Constant *Immediate);
+
   // getConstantPool() returns a copy of the constant pool for
   // constants of a given type.
   ConstantList getConstantPool(Type Ty) const;
 
+  // getImmediatePool() returns the list of pooled immediates.
+  ConstantList getImmediatePool() const;
+
   const ClFlags &getFlags() const { return Flags; }
 
   // Allocate data of type T using the global allocator.