#ifndef LLVM_BITCODE_BITCODES_H
#define LLVM_BITCODE_BITCODES_H
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/DataTypes.h"
+#include "llvm/Support/ErrorHandling.h"
#include <cassert>
namespace llvm {
namespace bitc {
enum StandardWidths {
- BlockIDWidth = 8, // We use VBR-8 for block IDs.
- CodeLenWidth = 4, // Codelen are VBR-4.
- BlockSizeWidth = 32 // BlockSize up to 2^32 32-bit words = 32GB per block.
+ BlockIDWidth = 8, // We use VBR-8 for block IDs.
+ CodeLenWidth = 4, // Codelen are VBR-4.
+ BlockSizeWidth = 32 // BlockSize up to 2^32 32-bit words = 16GB per block.
};
-
+
// The standard abbrev namespace always has a way to exit a block, enter a
// nested block, define abbrevs, and define an unabbreviated record.
enum FixedAbbrevIDs {
/// single bit to indicate if it is a literal encoding. If so, the value is
/// emitted with a vbr8. If not, the encoding is emitted as 3 bits followed
/// by the info value as a vbr5 if needed.
- DEFINE_ABBREV = 2,
-
+ DEFINE_ABBREV = 2,
+
// UNABBREV_RECORDs are emitted with a vbr6 for the record code, followed by
// a vbr6 for the # operands, followed by vbr6's for each operand.
UNABBREV_RECORD = 3,
-
+
// This is not a code, this is a marker for the first abbrev assignment.
FIRST_APPLICATION_ABBREV = 4
};
-
+
/// StandardBlockIDs - All bitcode files can optionally include a BLOCKINFO
/// block, which contains metadata about other blocks in the file.
enum StandardBlockIDs {
/// standard abbrevs that should be available to all blocks of a specified
/// ID.
BLOCKINFO_BLOCK_ID = 0,
-
+
// Block IDs 1-7 are reserved for future expansion.
FIRST_APPLICATION_BLOCKID = 8
};
-
+
/// BlockInfoCodes - The blockinfo block contains metadata about user-defined
/// blocks.
enum BlockInfoCodes {
- BLOCKINFO_CODE_SETBID = 1 // SETBID: [blockid#]
// DEFINE_ABBREV has magic semantics here, applying to the current SETBID'd
// block, instead of the BlockInfo block.
- // BLOCKNAME: give string name to block, if desired.
+
+ BLOCKINFO_CODE_SETBID = 1, // SETBID: [blockid#]
+ BLOCKINFO_CODE_BLOCKNAME = 2, // BLOCKNAME: [name]
+ BLOCKINFO_CODE_SETRECORDNAME = 3 // BLOCKINFO_CODE_SETRECORDNAME:
+ // [id, name]
};
-
+
} // End bitc namespace
/// BitCodeAbbrevOp - This describes one or more operands in an abbreviation.
Fixed = 1, // A fixed width field, Val specifies number of bits.
VBR = 2, // A VBR field where Val specifies the width of each chunk.
Array = 3, // A sequence of fields, next field species elt encoding.
- Char6 = 4 // A 6-bit fixed field which maps to [a-zA-Z0-9._].
+ Char6 = 4, // A 6-bit fixed field which maps to [a-zA-Z0-9._].
+ Blob = 5 // 32-bit aligned array of 8-bit characters.
};
-
+
explicit BitCodeAbbrevOp(uint64_t V) : Val(V), IsLiteral(true) {}
explicit BitCodeAbbrevOp(Encoding E, uint64_t Data = 0)
: Val(Data), IsLiteral(false), Enc(E) {}
-
- bool isLiteral() const { return IsLiteral; }
+
+ bool isLiteral() const { return IsLiteral; }
bool isEncoding() const { return !IsLiteral; }
// Accessors for literals.
uint64_t getLiteralValue() const { assert(isLiteral()); return Val; }
-
+
// Accessors for encoding info.
Encoding getEncoding() const { assert(isEncoding()); return (Encoding)Enc; }
uint64_t getEncodingData() const {
assert(isEncoding() && hasEncodingData());
return Val;
}
-
+
bool hasEncodingData() const { return hasEncodingData(getEncoding()); }
static bool hasEncodingData(Encoding E) {
switch (E) {
- default: assert(0 && "Unknown encoding");
case Fixed:
case VBR:
return true;
case Array:
case Char6:
+ case Blob:
return false;
}
+ report_fatal_error("Invalid encoding");
}
-
+
/// isChar6 - Return true if this character is legal in the Char6 encoding.
static bool isChar6(char C) {
if (C >= 'a' && C <= 'z') return true;
if (C >= 'a' && C <= 'z') return C-'a';
if (C >= 'A' && C <= 'Z') return C-'A'+26;
if (C >= '0' && C <= '9') return C-'0'+26+26;
- if (C == '.') return 62;
- if (C == '_') return 63;
- assert(0 && "Not a value Char6 character!");
- return 0;
+ if (C == '.') return 62;
+ if (C == '_') return 63;
+ llvm_unreachable("Not a value Char6 character!");
}
-
+
static char DecodeChar6(unsigned V) {
assert((V & ~63) == 0 && "Not a Char6 encoded character!");
- if (V < 26) return V+'a';
- if (V < 26+26) return V-26+'A';
+ if (V < 26) return V+'a';
+ if (V < 26+26) return V-26+'A';
if (V < 26+26+10) return V-26-26+'0';
- if (V == 62) return '.';
- if (V == 63) return '_';
- assert(0 && "Not a value Char6 character!");
- return ' ';
+ if (V == 62) return '.';
+ if (V == 63) return '_';
+ llvm_unreachable("Not a value Char6 character!");
}
-
+
};
+template <> struct isPodLike<BitCodeAbbrevOp> { static const bool value=true; };
+
/// BitCodeAbbrev - This class represents an abbreviation record. An
/// abbreviation allows a complex record that has redundancy to be stored in a
/// specialized format instead of the fully-general, fully-vbr, format.
-class BitCodeAbbrev {
- SmallVector<BitCodeAbbrevOp, 8> OperandList;
- unsigned char RefCount; // Number of things using this.
- ~BitCodeAbbrev() {}
-public:
- BitCodeAbbrev() : RefCount(1) {}
-
- void addRef() { ++RefCount; }
- void dropRef() { if (--RefCount == 0) delete this; }
+class BitCodeAbbrev : public RefCountedBase<BitCodeAbbrev> {
+ SmallVector<BitCodeAbbrevOp, 32> OperandList;
+ // Only RefCountedBase is allowed to delete.
+ ~BitCodeAbbrev() = default;
+ friend class RefCountedBase<BitCodeAbbrev>;
+public:
unsigned getNumOperandInfos() const {
return static_cast<unsigned>(OperandList.size());
}
const BitCodeAbbrevOp &getOperandInfo(unsigned N) const {
return OperandList[N];
}
-
+
void Add(const BitCodeAbbrevOp &OpInfo) {
OperandList.push_back(OpInfo);
}
projects / oota-llvm.git / blobdiff