Add a few Subzero intrinsics (not the atomic ones yet).

src/IceGlobalContext.h

Index: src/IceGlobalContext.h
diff --git a/src/IceGlobalContext.h b/src/IceGlobalContext.h
index beb5bc077e1de921623e0fc0b0a1dcc359b02f21..d1852b807b9f5913e54b86c330377ed06eb3411b 100644
--- a/src/IceGlobalContext.h
+++ b/src/IceGlobalContext.h
@@ -20,6 +20,7 @@
 #include "llvm/Support/raw_ostream.h"
 
 #include "IceDefs.h"
+#include "IceIntrinsics.h"
 #include "IceTypes.h"
 
 namespace Ice {
@@ -84,6 +85,11 @@ public:
   // Allocate data of type T using the global allocator.
   template <typename T> T *allocate() { return Allocator.Allocate<T>(); }
 
+  // Return the IntrinsicInfo for a function with the given Name.
+  // Return UnknownIntrinsicInfo if the name does not match any
+  // known intrinsics.
+  IntrinsicInfo getIntrinsicInfo(const IceString &Name) const;
+
 private:
   Ostream StrDump; // Stream for dumping / diagnostics
   Ostream StrEmit; // Stream for code emission
@@ -91,6 +97,7 @@ private:
   llvm::BumpPtrAllocator Allocator;
   VerboseMask VMask;
   llvm::OwningPtr<class ConstantPool> ConstPool;
+  IntrinsicMap IntrinsicInfos;
   const TargetArch Arch;
   const OptLevel Opt;
   const IceString TestPrefix;