Add call instructions to Subzero's bitcode reader.

src/IceIntrinsics.h

 //===- subzero/src/IceIntrinsics.h - List of Ice Intrinsics -----*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares the kinds of intrinsics supported by PNaCl.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICEINTRINSICS_H
 #define SUBZERO_SRC_ICEINTRINSICS_H
 
 #include "IceDefs.h"
 #include "IceTypes.h"
 
 namespace Ice {
 
+class InstCall;
+
 static const size_t kMaxIntrinsicParameters = 6;
 
 class Intrinsics {
 public:
   Intrinsics();
   ~Intrinsics();
 
   // Some intrinsics allow overloading by type. This enum collapses all
   // overloads into a single ID, but the type can still be recovered by the
   // type of the intrinsic function call's return value and parameters.
@@ skipping 69 matching lines @@
   // Basic attributes related to each intrinsic, that are relevant to
   // code generation. Perhaps the attributes representation can be shared
   // with general function calls, but PNaCl currently strips all
   // attributes from functions.
   struct IntrinsicInfo {
     enum IntrinsicID ID : 30;
     enum SideEffects HasSideEffects : 1;
     enum ReturnsTwice ReturnsTwice : 1;
   };
 
+  // The types of validation values for FullIntrinsicInfo.validateCall.
+  enum ValidateCallValue {
+    IsValidCall,      // Valid use of instrinsic call.
+    BadReturnType,    // Return type invalid for intrinsic.
+    WrongNumOfArgs,   // Wrong number of arguments for intrinsic.
+    WrongCallArgType, // Argument of wrong type.
+  };
+
   // The complete set of information about an intrinsic.
   struct FullIntrinsicInfo {
     struct IntrinsicInfo Info; // Information that CodeGen would care about.
 
     // Sanity check during parsing.
     Type Signature[kMaxIntrinsicParameters];
     uint8_t NumTypes;
+
+    // Validates that type signature of call matches intrinsic.
+    // If WrongArgumentType is returned, ArgIndex is set to corresponding
+    // argument index.
+    ValidateCallValue validateCall(const Ice::InstCall *Call,
+                                   SizeT &ArgIndex) const;
+
+    // Returns the return type of the intrinsic.
+    Type getReturnType() const {
+      assert(NumTypes > 1);
+      return Signature[0];
+    }
+
+    // Returns number of arguments expected.
+    SizeT getNumArgs() const {
+      assert(NumTypes > 1);
+      return NumTypes - 1;
+    }
+
+    // Returns type of Index-th argument.
+    Type getArgType(SizeT Index) const;
   };
 
   // Find the information about a given intrinsic, based on function name.
   // The function name is expected to have the common "llvm." prefix
   // stripped. If found, returns a reference to a FullIntrinsicInfo entry
   // (valid for the lifetime of the map). Otherwise returns null.
   const FullIntrinsicInfo *find(const IceString &Name) const;
 
 private:
   // TODO(jvoung): May want to switch to something like LLVM's StringMap.
   typedef std::map<IceString, FullIntrinsicInfo> IntrinsicMap;
   IntrinsicMap map;
 
   Intrinsics(const Intrinsics &) LLVM_DELETED_FUNCTION;
   Intrinsics &operator=(const Intrinsics &) LLVM_DELETED_FUNCTION;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEINTRINSICS_H