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-rw-r--r--include/clang/Basic/DiagnosticFrontendKinds.td4
-rw-r--r--include/clang/Basic/Version.h35
-rw-r--r--include/clang/Frontend/PCHBitCodes.h25
-rw-r--r--include/clang/Frontend/PCHWriter.h2
-rw-r--r--lib/Driver/Driver.cpp9
-rw-r--r--lib/Frontend/PCHReader.cpp8
-rw-r--r--lib/Frontend/PCHWriter.cpp27
7 files changed, 92 insertions, 18 deletions
diff --git a/include/clang/Basic/DiagnosticFrontendKinds.td b/include/clang/Basic/DiagnosticFrontendKinds.td
index 55d1dfacb8..64a1777924 100644
--- a/include/clang/Basic/DiagnosticFrontendKinds.td
+++ b/include/clang/Basic/DiagnosticFrontendKinds.td
@@ -115,4 +115,8 @@ def warn_pch_preprocessor : Warning<
"current translation unit">;
def note_predef_in_pch : Note<
"preprocessor definitions in PCH file">;
+def warn_pch_version_too_old : Warning<
+ "PCH file uses an older PCH format that is no longer supported">;
+def warn_pch_version_too_new : Warning<
+ "PCH file uses a newer PCH format that cannot be read">;
}
diff --git a/include/clang/Basic/Version.h b/include/clang/Basic/Version.h
new file mode 100644
index 0000000000..f0e1aa7db2
--- /dev/null
+++ b/include/clang/Basic/Version.h
@@ -0,0 +1,35 @@
+//===- Version.h - Clang Version Number -------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This header defines version macros for Clang.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_BASIC_VERSION_H
+#define LLVM_CLANG_BASIC_VERSION_H
+
+/// \brief Clang major version
+#define CLANG_VERSION_MAJOR 1
+
+/// \brief Clang minor version
+#define CLANG_VERSION_MINOR 0
+
+/// \brief Helper macro for CLANG_VERSION_STRING.
+#define CLANG_MAKE_VERSION_STRING2(X) #X
+
+/// \brief Helper macro for CLANG_VERSION_STRING.
+#define CLANG_MAKE_VERSION_STRING(X,Y) CLANG_MAKE_VERSION_STRING2(X.Y)
+
+/// \brief A string that describes the Clang version number, e.g.,
+/// "1.0".
+#define CLANG_VERSION_STRING \
+ CLANG_MAKE_VERSION_STRING(CLANG_VERSION_MAJOR,CLANG_VERSION_MINOR)
+
+
+#endif // LLVM_CLANG_BASIC_VERSION_H
diff --git a/include/clang/Frontend/PCHBitCodes.h b/include/clang/Frontend/PCHBitCodes.h
index 7f5e7c500f..a4da704386 100644
--- a/include/clang/Frontend/PCHBitCodes.h
+++ b/include/clang/Frontend/PCHBitCodes.h
@@ -22,6 +22,25 @@
namespace clang {
namespace pch {
+ /// \brief PCH major version number supported by this version of
+ /// Clang.
+ ///
+ /// Whenever the PCH format changes in a way that makes it
+ /// incompatible with previous versions (such that a reader
+ /// designed for the previous version could not support reading
+ /// the new version), this number should be increased.
+ const unsigned VERSION_MAJOR = 1;
+
+ /// \brief PCH minor version number supported by this version of
+ /// Clang.
+ ///
+ /// Whenever the PCH format changes in a way that is still
+ /// compatible with previous versions (such that a reader designed
+ /// for the previous version could still support reading the new
+ /// version by ignoring new kinds of subblocks), this number
+ /// should be increased.
+ const unsigned VERSION_MINOR = 0;
+
/// \brief An ID number that refers to a declaration in a PCH file.
///
/// The ID numbers of types are consecutive (in order of
@@ -108,9 +127,9 @@ namespace clang {
/// actually important to check.
LANGUAGE_OPTIONS = 3,
- /// \brief Record code for the target triple used to build the
- /// PCH file.
- TARGET_TRIPLE = 4,
+ /// \brief PCH metadata, including the PCH file version number
+ /// and the target triple used to build the PCH file.
+ METADATA = 4,
/// \brief Record code for the table of offsets of each
/// identifier ID.
diff --git a/include/clang/Frontend/PCHWriter.h b/include/clang/Frontend/PCHWriter.h
index b16058c154..3c2d5ff1af 100644
--- a/include/clang/Frontend/PCHWriter.h
+++ b/include/clang/Frontend/PCHWriter.h
@@ -160,7 +160,7 @@ private:
unsigned NumVisibleDeclContexts;
void WriteBlockInfoBlock();
- void WriteTargetTriple(const TargetInfo &Target);
+ void WriteMetadata(const TargetInfo &Target);
void WriteLanguageOptions(const LangOptions &LangOpts);
void WriteStatCache(MemorizeStatCalls &StatCalls);
void WriteSourceManagerBlock(SourceManager &SourceMgr,
diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index d88f1b3598..d6a046e9c3 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -22,6 +22,8 @@
#include "clang/Driver/ToolChain.h"
#include "clang/Driver/Types.h"
+#include "clang/Basic/Version.h"
+
#include "llvm/ADT/StringSet.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/raw_ostream.h"
@@ -353,8 +355,8 @@ void Driver::PrintVersion(const Compilation &C) const {
// FIXME: The following handlers should use a callback mechanism, we
// don't know what the client would like to do.
- // FIXME: Do not hardcode clang version.
- llvm::errs() << "clang version 1.0 (" << vers << " " << revision << ")" << "\n";
+ llvm::errs() << "clang version " CLANG_VERSION_STRING " ("
+ << vers << " " << revision << ")" << "\n";
const ToolChain &TC = C.getDefaultToolChain();
llvm::errs() << "Target: " << TC.getTripleString() << '\n';
@@ -366,8 +368,7 @@ bool Driver::HandleImmediateArgs(const Compilation &C) {
// in practice.
if (C.getArgs().hasArg(options::OPT_dumpversion)) {
- // FIXME: Do not hardcode clang version.
- llvm::outs() << "1.0\n";
+ llvm::outs() << CLANG_VERSION_STRING "\n";
return false;
}
diff --git a/lib/Frontend/PCHReader.cpp b/lib/Frontend/PCHReader.cpp
index 24e4e2b02f..c1cb87bc16 100644
--- a/lib/Frontend/PCHReader.cpp
+++ b/lib/Frontend/PCHReader.cpp
@@ -928,7 +928,13 @@ PCHReader::ReadPCHBlock() {
return IgnorePCH;
break;
- case pch::TARGET_TRIPLE: {
+ case pch::METADATA: {
+ if (Record[0] != pch::VERSION_MAJOR) {
+ Diag(Record[0] < pch::VERSION_MAJOR? diag::warn_pch_version_too_old
+ : diag::warn_pch_version_too_new);
+ return IgnorePCH;
+ }
+
std::string TargetTriple(BlobStart, BlobLen);
if (TargetTriple != PP.getTargetInfo().getTargetTriple()) {
Diag(diag::warn_pch_target_triple)
diff --git a/lib/Frontend/PCHWriter.cpp b/lib/Frontend/PCHWriter.cpp
index 817893448a..6b58e25092 100644
--- a/lib/Frontend/PCHWriter.cpp
+++ b/lib/Frontend/PCHWriter.cpp
@@ -27,6 +27,7 @@
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/SourceManagerInternals.h"
#include "clang/Basic/TargetInfo.h"
+#include "clang/Basic/Version.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APInt.h"
#include "llvm/Bitcode/BitstreamWriter.h"
@@ -341,7 +342,7 @@ void PCHWriter::WriteBlockInfoBlock() {
RECORD(TYPE_OFFSET);
RECORD(DECL_OFFSET);
RECORD(LANGUAGE_OPTIONS);
- RECORD(TARGET_TRIPLE);
+ RECORD(METADATA);
RECORD(IDENTIFIER_OFFSET);
RECORD(IDENTIFIER_TABLE);
RECORD(EXTERNAL_DEFINITIONS);
@@ -440,18 +441,26 @@ void PCHWriter::WriteBlockInfoBlock() {
}
-/// \brief Write the target triple (e.g., i686-apple-darwin9).
-void PCHWriter::WriteTargetTriple(const TargetInfo &Target) {
+/// \brief Write the PCH metadata (e.g., i686-apple-darwin9).
+void PCHWriter::WriteMetadata(const TargetInfo &Target) {
using namespace llvm;
BitCodeAbbrev *Abbrev = new BitCodeAbbrev();
- Abbrev->Add(BitCodeAbbrevOp(pch::TARGET_TRIPLE));
- Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Triple name
- unsigned TripleAbbrev = Stream.EmitAbbrev(Abbrev);
+ Abbrev->Add(BitCodeAbbrevOp(pch::METADATA));
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // PCH major
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // PCH minor
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang major
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Clang minor
+ Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Target triple
+ unsigned AbbrevCode = Stream.EmitAbbrev(Abbrev);
RecordData Record;
- Record.push_back(pch::TARGET_TRIPLE);
+ Record.push_back(pch::METADATA);
+ Record.push_back(pch::VERSION_MAJOR);
+ Record.push_back(pch::VERSION_MINOR);
+ Record.push_back(CLANG_VERSION_MAJOR);
+ Record.push_back(CLANG_VERSION_MINOR);
const char *Triple = Target.getTargetTriple();
- Stream.EmitRecordWithBlob(TripleAbbrev, Record, Triple, strlen(Triple));
+ Stream.EmitRecordWithBlob(AbbrevCode, Record, Triple, strlen(Triple));
}
/// \brief Write the LangOptions structure.
@@ -1672,7 +1681,7 @@ void PCHWriter::WritePCH(Sema &SemaRef, MemorizeStatCalls *StatCalls) {
// Write the remaining PCH contents.
RecordData Record;
Stream.EnterSubblock(pch::PCH_BLOCK_ID, 4);
- WriteTargetTriple(Context.Target);
+ WriteMetadata(Context.Target);
WriteLanguageOptions(Context.getLangOptions());
if (StatCalls)
WriteStatCache(*StatCalls);
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-08-02 21:20:57 +0000