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src/share/vm/opto/opcodes.hpp

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@@ -25,11 +25,11 @@
 #ifndef SHARE_VM_OPTO_OPCODES_HPP
 #define SHARE_VM_OPTO_OPCODES_HPP
 
 // Build a big enum of class names to give them dense integer indices
 #define macro(x) Op_##x,
-enum Opcodes {
+enum Opcodes : uint {
   Op_Node = 0,
   macro(Set)                    // Instruction selection match rule
   macro(RegN)                   // Machine narrow oop register
   macro(RegI)                   // Machine integer register
   macro(RegP)                   // Machine pointer register
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