to Benjamin Kramer for steering me in the right direction here.

llvm-svn: 135031

destroy those types in ~LLVMContext.

llvm-svn: 134945

patch brings numerous advantages to LLVM.  One way to look at it
is through diffstat:
 109 files changed, 3005 insertions(+), 5906 deletions(-)

Removing almost 3K lines of code is a good thing.  Other advantages
include:

1. Value::getType() is a simple load that can be CSE'd, not a mutating
   union-find operation.
2. Types a uniqued and never move once created, defining away PATypeHolder.
3. Structs can be "named" now, and their name is part of the identity that
   uniques them.  This means that the compiler doesn't merge them structurally
   which makes the IR much less confusing.
4. Now that there is no way to get a cycle in a type graph without a named
   struct type, "upreferences" go away.
5. Type refinement is completely gone, which should make LTO much MUCH faster
   in some common cases with C++ code.
6. Types are now generally immutable, so we can use "Type *" instead 
   "const Type *" everywhere.

Downsides of this patch are that it removes some functions from the C API,
so people using those will have to upgrade to (not yet added) new API.  
"LLVM 3.0" is the right time to do this.

There are still some cleanups pending after this, this patch is large enough
as-is.

llvm-svn: 134829

llvm-svn: 116279

(The Ada bindings probably need it too, but all the
obvious places to change say "do not edit this file".)

llvm-svn: 113618

modules are instantiated in them.  If the context is deleted, all of its owned
modules are also deleted.

llvm-svn: 113374

being actively maintained, improved, or extended.

llvm-svn: 112356

llvm-svn: 101376

llvm-svn: 100506

by dropping all references from all constants that can use other
constants before trying to destroy any of them.

I also had to free bugpoint's Module in ~BugDriver().

llvm-svn: 99160

where FoldingSet<MDNode> is instantiated.  Clang and MSVC complain; gcc
doesn't.

llvm-svn: 99147

llvm-svn: 99146

Factor some of the constants+context related code out into a separate header, to make LLVMContextImpl.h
not hideous.  Also, fix some MSVC compile errors.

llvm-svn: 78115

llvm-svn: 78097

llvm-svn: 77911

llvm-svn: 77907

llvm-svn: 77733

llvm-svn: 77635

New name is Metadata.h.

llvm-svn: 77370

llvm-svn: 77366

llvm-svn: 77347

llvm-svn: 77266

llvm-svn: 77247

Also, change MDString to use a StringRef.

llvm-svn: 77098

Revert the ConstantInt constructors back to their 2.5 forms where possible, thanks to contexts-on-types.  More to come.

llvm-svn: 77011

llvm-svn: 76922

llvm-svn: 76912

 - Yay for '-'s and simplifications!

 - I kept StringMap::GetOrCreateValue for compatibility purposes, this can
   eventually go away. Likewise the StringMapEntry Create functions still follow
   the old style.

 - NIFC.

llvm-svn: 76888

- Rename member function size(). New name is length().
- Store string beginning and length. Earlier it used to store string end.

llvm-svn: 76841

Derive MDNode from MetadataBase instead of Constant. Emit MDNodes into METADATA_BLOCK in bitcode file.

llvm-svn: 76834

llvm-svn: 76639

llvm-svn: 76634

llvm-svn: 76126

llvm-svn: 76113

llvm-svn: 76097

our current context-passing stuff, which is also fixed here

llvm-svn: 76089