llvm-project/clang
Douglas Gregor 9b3932c0bc Fix a marvelous chained AST writing bug, where we end up with the
following amusing sequence:
  - AST writing schedules writing a type X* that it had never seen
  before
  - AST writing starts writing another declaration, ends up
  deserializing X* from a prior AST file. Now we have two type IDs for
  the same type!
  - AST writer tries to write X*. It only has the lower-numbered ID
  from the the prior AST file, so references to the higher-numbered ID
  that was scheduled for writing go off into lalaland.

To fix this, keep the higher-numbered ID so we end up writing the type
twice. Since this issue occurs so rarely, and type records are
generally rather small, I deemed this better than the alternative: to
keep a separate mapping from the higher-numbered IDs to the
lower-numbered IDs, which we would end up having to check whenever we
want to deserialize any type.

Fixes <rdar://problem/8511624>, I think.

llvm-svn: 115647
2010-10-05 18:37:06 +00:00
..
INPUTS
bindings/python Rename 'CIndex' to 'libclang', since it has basically become our stable public 2010-04-30 21:51:10 +00:00
clang.xcodeproj Fix a block rewriter bug where copy/dispose entries in 2010-10-05 18:05:06 +00:00
docs Implement the C++0x "trailing return type" feature, e.g., 2010-10-01 18:44:50 +00:00
examples Rename 'MaxLoop' to 'MaxVisit' in AnalysisManager to more correctly reflect that we aborted analysis may not necessarily be due to a loop. 2010-09-14 21:35:27 +00:00
include Give every file that ASTReader loads a type: module, PCH, precompiled preamble or main file. Base Decls' PCHLevel on this to make it more sane. 2010-10-05 16:15:19 +00:00
lib Fix a marvelous chained AST writing bug, where we end up with the 2010-10-05 18:37:06 +00:00
runtime Driver/Darwin: Add a runtime library just for ___eprintf -- when targeting i386 2010-09-22 00:03:52 +00:00
test Fix a marvelous chained AST writing bug, where we end up with the 2010-10-05 18:37:06 +00:00
tools Fix a marvelous chained AST writing bug, where we end up with the 2010-10-05 18:37:06 +00:00
utils utils/ABITest: Factor out type naming code slightly. 2010-09-27 20:13:24 +00:00
www www: Add a "Clang Related Projects" page, to collect links to external projects 2010-10-04 15:40:45 +00:00
CMakeLists.txt Revert "CMake: Update to use standard CMake dependency tracking facilities instead" 2010-09-13 23:54:41 +00:00
INSTALL.txt
LICENSE.TXT 2010 is here. 2010-01-09 18:40:42 +00:00
Makefile Move lib/Runtime to runtime/, and build after everything else. 2010-06-30 22:10:38 +00:00
ModuleInfo.txt
NOTES.txt A Release-Asserts build is now called a Release build. 2010-07-07 07:49:17 +00:00
README.txt Fix typo (test commit) 2010-06-17 12:39:05 +00:00
TODO.txt switch -Werror/-Wfatal-errors error conditions to use diagnostics instead 2009-12-23 18:53:37 +00:00

README.txt

//===----------------------------------------------------------------------===//
// C Language Family Front-end
//===----------------------------------------------------------------------===//

Welcome to Clang.  This is a compiler front-end for the C family of languages
(C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM
compiler infrastructure project.

Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
different source level tools.  One example of this is the Clang Static Analyzer.

If you're interested in more (including how to build Clang) it is best to read
the relevant web sites.  Here are some pointers:

Information on Clang:              http://clang.llvm.org/
Building and using Clang:          http://clang.llvm.org/get_started.html
Clang Static Analyzer:             http://clang-analyzer.llvm.org/
Information on the LLVM project:   http://llvm.org/

If you have questions or comments about Clang, a great place to discuss them is
on the Clang development mailing list:
  http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev

If you find a bug in Clang, please file it in the LLVM bug tracker:
  http://llvm.org/bugs/