Pack MachineInstr fields better.

[oota-llvm.git] / include / llvm / CodeGen / MachineInstr.h

diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h
index 76738e28c2609e58fa6170c71b8e50678e7986e8..89521e8fdb9847b7c8c5951f9eb7841752dc67c5 100644 (file)
--- a/include/llvm/CodeGen/MachineInstr.h
+++ b/include/llvm/CodeGen/MachineInstr.h
@@ -87,7 +87,7 @@ private:
                                         // anything other than to convey comment
                                         // information to AsmPrinter.
 
-  uint16_t NumMemRefs;                  // information on memory references
+  uint8_t NumMemRefs;                   // Information on memory references.
   mmo_iterator MemRefs;
 
   DebugLoc debugLoc;                    // Source line information.
@@ -993,7 +993,8 @@ public:
   /// list. This does not transfer ownership.
   void setMemRefs(mmo_iterator NewMemRefs, mmo_iterator NewMemRefsEnd) {
     MemRefs = NewMemRefs;
-    NumMemRefs = NewMemRefsEnd - NewMemRefs;
+    NumMemRefs = uint8_t(NewMemRefsEnd - NewMemRefs);
+    assert(NumMemRefs == NewMemRefsEnd - NewMemRefs && "Too many memrefs");
   }
 
 private: