Log Message:
Changes 3.3:
The CellSPU port has been removed. It can still be found in older versions.
The IR-level extended linker APIs (for example, to link bitcode files out of \ 
archives) have been removed. Any existing clients of these features should move \ 
to using a linker with integrated LTO support.
LLVM and Clang’s documentation has been migrated to the Sphinx \ 
documentation generation system which uses easy-to-write reStructuredText. See \ 
llvm/docs/README.txt for more information.
TargetTransformInfo (TTI) is a new interface that can be used by IR-level passes \ 
to obtain target-specific information, such as the costs of instructions. Only \ 
“Lowering” passes such as LSR and the vectorizer are allowed to use \ 
the TTI infrastructure.
We’ve improved the X86 and ARM cost model.
The Attributes classes have been completely rewritten and expanded. They now \ 
support not only enumerated attributes and alignments, but “string” \ 
attributes, which are useful for passing information to code generation. See How \ 
To Use Attributes for more details.
TableGen’s syntax for instruction selection patterns has been simplified. \ 
Instead of specifying types indirectly with register classes, you should now \ 
specify types directly in the input patterns. See SparcInstrInfo.td for examples \ 
of the new syntax. The old syntax using register classes still works, but it \ 
will be removed in a future LLVM release.
MCJIT now supports exception handling. Support for it in the old jit will be \ 
removed in the 3.4 release.
Command line options can now be grouped into categories which are shown in the \ 
output of -help. See Grouping options into categories.
The appearance of command line options in -help that are inherited by linking \ 
with libraries that use the LLVM Command line support library can now be \ 
modified at runtime. See The cl::getRegisteredOptions function.