Copy LLVM bitcode reader to generate a PNaCl wire format reader.

include/llvm/Bitcode/NaCl/NaClLLVMBitCodes.h

Index: include/llvm/Bitcode/NaCl/NaClLLVMBitCodes.h
diff --git a/include/llvm/Bitcode/LLVMBitCodes.h b/include/llvm/Bitcode/NaCl/NaClLLVMBitCodes.h
similarity index 92%
copy from include/llvm/Bitcode/LLVMBitCodes.h
copy to include/llvm/Bitcode/NaCl/NaClLLVMBitCodes.h
index f9690d5b779c0113468753d6f95aefdd9651cb97..a211a61edc2fe06568b974e44fa5f7065c8c923f 100644
--- a/include/llvm/Bitcode/LLVMBitCodes.h
+++ b/include/llvm/Bitcode/NaCl/NaClLLVMBitCodes.h
@@ -1,4 +1,5 @@
-//===- LLVMBitCodes.h - Enum values for the LLVM bitcode format -*- C++ -*-===//
+//===- NaClLLVMBitCodes.h ---------------------------------------*- C++ -*-===//
+//     Enum values for the NaCl bitcode wire format
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -7,7 +8,7 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This header defines Bitcode enum values for LLVM IR bitcode files.
+// This header defines Bitcode enum values for NaCl bitcode wire format.
 //
 // The enum values defined in this file should be considered permanent.  If
 // new features are added, they should have values added at the end of the
@@ -15,17 +16,19 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_BITCODE_LLVMBITCODES_H
-#define LLVM_BITCODE_LLVMBITCODES_H
+#ifndef LLVM_BITCODE_NACL_NACLBITCODES_H
+#define LLVM_BITCODE_NACL_NACLBITCODES_H
 
+// TODO(kschimpf) Make a NaCl version of BitCodes.h, so that block id's
+// and abbreviations can be modified.
 #include "llvm/Bitcode/BitCodes.h"
 
 namespace llvm {
-namespace bitc {
+namespace naclbitc {
   // The only top-level block type defined is for a module.
-  enum BlockIDs {
+  enum NaClBlockIDs {
     // Blocks
-    MODULE_BLOCK_ID          = FIRST_APPLICATION_BLOCKID,
+    MODULE_BLOCK_ID          = bitc::FIRST_APPLICATION_BLOCKID,
 
     // Module sub-block id's.
     PARAMATTR_BLOCK_ID,
@@ -47,7 +50,7 @@ namespace bitc {
 
 
   /// MODULE blocks have a number of optional fields and subblocks.
-  enum ModuleCodes {
+  enum NaClModuleCodes {
     MODULE_CODE_VERSION     = 1,    // VERSION:     [version#]
     MODULE_CODE_TRIPLE      = 2,    // TRIPLE:      [strchr x N]
     MODULE_CODE_DATALAYOUT  = 3,    // DATALAYOUT:  [strchr x N]
@@ -75,7 +78,7 @@ namespace bitc {
   };
 
   /// PARAMATTR blocks have code for defining a parameter attribute set.
-  enum AttributeCodes {
+  enum NaClAttributeCodes {
     // FIXME: Remove `PARAMATTR_CODE_ENTRY_OLD' in 4.0
     PARAMATTR_CODE_ENTRY_OLD  = 1, // ENTRY: [paramidx0, attr0,
                                    //         paramidx1, attr1...]
@@ -85,7 +88,7 @@ namespace bitc {
   };
 
   /// TYPE blocks have codes for each type primitive they use.
-  enum TypeCodes {
+  enum NaClTypeCodes {
     TYPE_CODE_NUMENTRY =  1,    // NUMENTRY: [numentries]
 
     // Type Codes
@@ -124,17 +127,17 @@ namespace bitc {
   };
 
   // The type symbol table only has one code (TST_ENTRY_CODE).
-  enum TypeSymtabCodes {
+  enum NaClTypeSymtabCodes {
     TST_CODE_ENTRY = 1     // TST_ENTRY: [typeid, namechar x N]
   };
 
   // The value symbol table only has one code (VST_ENTRY_CODE).
-  enum ValueSymtabCodes {
+  enum NaClValueSymtabCodes {
     VST_CODE_ENTRY   = 1,  // VST_ENTRY: [valid, namechar x N]
     VST_CODE_BBENTRY = 2   // VST_BBENTRY: [bbid, namechar x N]
   };
 
-  enum MetadataCodes {
+  enum NaClMetadataCodes {
     METADATA_STRING        = 1,   // MDSTRING:      [values]
     // 2 is unused.
     // 3 is unused.
@@ -150,7 +153,7 @@ namespace bitc {
 
   // The constants block (CONSTANTS_BLOCK_ID) describes emission for each
   // constant and maintains an implicit current type value.
-  enum ConstantsCodes {
+  enum NaClConstantsCodes {
     CST_CODE_SETTYPE       =  1,  // SETTYPE:       [typeid]
     CST_CODE_NULL          =  2,  // NULL
     CST_CODE_UNDEF         =  3,  // UNDEF
@@ -182,7 +185,7 @@ namespace bitc {
   /// cast a CST_CODE_CE_CAST or a XXX refers to.  The values of these enums
   /// have no fixed relation to the LLVM IR enum values.  Changing these will
   /// break compatibility with old files.
-  enum CastOpcodes {
+  enum NaClCastOpcodes {
     CAST_TRUNC    =  0,
     CAST_ZEXT     =  1,
     CAST_SEXT     =  2,
@@ -201,7 +204,7 @@ namespace bitc {
   /// binop a CST_CODE_CE_BINOP or a XXX refers to.  The values of these enums
   /// have no fixed relation to the LLVM IR enum values.  Changing these will
   /// break compatibility with old files.
-  enum BinaryOpcodes {
+  enum NaClBinaryOpcodes {
     BINOP_ADD  =  0,
     BINOP_SUB  =  1,
     BINOP_MUL  =  2,
@@ -220,7 +223,7 @@ namespace bitc {
   /// These are values used in the bitcode files to encode AtomicRMW operations.
   /// The values of these enums have no fixed relation to the LLVM IR enum
   /// values.  Changing these will break compatibility with old files.
-  enum RMWOperations {
+  enum NaClRMWOperations {
     RMW_XCHG = 0,
     RMW_ADD = 1,
     RMW_SUB = 2,
@@ -236,19 +239,19 @@ namespace bitc {
 
   /// OverflowingBinaryOperatorOptionalFlags - Flags for serializing
   /// OverflowingBinaryOperator's SubclassOptionalData contents.
-  enum OverflowingBinaryOperatorOptionalFlags {
+  enum NaClOverflowingBinaryOperatorOptionalFlags {
     OBO_NO_UNSIGNED_WRAP = 0,
     OBO_NO_SIGNED_WRAP = 1
   };
 
   /// PossiblyExactOperatorOptionalFlags - Flags for serializing
   /// PossiblyExactOperator's SubclassOptionalData contents.
-  enum PossiblyExactOperatorOptionalFlags {
+  enum NaClPossiblyExactOperatorOptionalFlags {
     PEO_EXACT = 0
   };
 
   /// Encoded AtomicOrdering values.
-  enum AtomicOrderingCodes {
+  enum NaClAtomicOrderingCodes {
     ORDERING_NOTATOMIC = 0,
     ORDERING_UNORDERED = 1,
     ORDERING_MONOTONIC = 2,
@@ -259,14 +262,14 @@ namespace bitc {
   };
 
   /// Encoded SynchronizationScope values.
-  enum AtomicSynchScopeCodes {
+  enum NaClAtomicSynchScopeCodes {
     SYNCHSCOPE_SINGLETHREAD = 0,
     SYNCHSCOPE_CROSSTHREAD = 1
   };
 
   // The function body block (FUNCTION_BLOCK_ID) describes function bodies.  It
   // can contain a constant block (CONSTANTS_BLOCK_ID).
-  enum FunctionCodes {
+  enum NaClFunctionCodes {
     FUNC_CODE_DECLAREBLOCKS    =  1, // DECLAREBLOCKS: [n]
 
     FUNC_CODE_INST_BINOP       =  2, // BINOP:      [opcode, ty, opval, opval]
@@ -327,10 +330,10 @@ namespace bitc {
                                      //         ordering, synchscope]
   };
 
-  enum UseListCodes {
+  enum NaClUseListCodes {
     USELIST_CODE_ENTRY = 1   // USELIST_CODE_ENTRY: TBD.
   };
-} // End bitc namespace
+} // End naclbitc namespace
 } // End llvm namespace
 
 #endif