llvm-svn: 48588

llvm-svn: 48573

llvm-svn: 48567

llvm-svn: 48556

llvm-svn: 48474

Patch originally by Erick Tryzelaar, but has been modified somewhat.

llvm-svn: 48419

the type instead of the byte size. This was causing troublesome mis-compilations.

True to form, this took 2 days to find and is a one-line fix. :-P

llvm-svn: 48354

pointer bitcast when performing return slot optimization.

llvm-svn: 48343

successors. This makes it support nounwind.

llvm-svn: 48320

1. There is now a "PAListPtr" class, which is a smart pointer around
   the underlying uniqued parameter attribute list object, and manages
   its refcount.  It is now impossible to mess up the refcount.
2. PAListPtr is now the main interface to the underlying object, and
   the underlying object is now completely opaque.
3. Implementation details like SmallVector and FoldingSet are now no
   longer part of the interface.
4. You can create a PAListPtr with an arbitrary sequence of
   ParamAttrsWithIndex's, no need to make a SmallVector of a specific 
   size (you can just use an array or scalar or vector if you wish).
5. All the client code that had to check for a null pointer before
   dereferencing the pointer is simplified to just access the 
   PAListPtr directly.
6. The interfaces for adding attrs to a list and removing them is a
   bit simpler.

Phase #2 will rename some stuff (e.g. PAListPtr) and do other less 
invasive changes.

llvm-svn: 48289

Improve the return slot optimization to be both more aggressive (not limited to sret parameters), and 
safer (when the passed pointer might be invalid).  Thanks to Duncan and Chris for the idea behind this, 
and extra thanks to Duncan for helping me work out the trap-safety.

llvm-svn: 48280

llvm-svn: 48267

llvm-svn: 48262

llvm-svn: 48254

llvm-svn: 48253

before trying to merge the block into its predecessors.
This allows two-entry-phi-return.ll to be simplified
into a single basic block.

llvm-svn: 48252

llvm-svn: 48233

Right now, the pass does not optimize tail recursions 
involving multiple return values.

llvm-svn: 48228

llvm-svn: 48227

llvm-svn: 48210

has single return value.

llvm-svn: 48162

llvm-svn: 48161

llvm-svn: 48160

llvm-svn: 48123

- "Redefinition of I" (iterator masks previous definition)
- include missing header file

Patch by Argiris Kirtzidis!

llvm-svn: 48115

llvm-svn: 48112

llvm-svn: 48111

llvm-svn: 48109

llvm-svn: 48106

Secondly, we have to check whether the branch is actually pointing to the block
with the unwind in it. We could have gotten here because of the unwind_to alone.

llvm-svn: 48099

at all.

llvm-svn: 48096

and also update the cloning interface's major user, the loop optimizations.

llvm-svn: 48088

llvm-svn: 48086

Add the ability to remove just one instance of a BB from a phi node. This fixes
the compile error in the tree now.

llvm-svn: 48085

removal of invoke, PR1269.

llvm-svn: 48084

llvm-svn: 48047

llvm-svn: 48020

add a pass that can extract all kinds of global values, not just functions.  Update llvm-extract to use it and optionally extract a global variable if you want it too

llvm-svn: 48015

llvm-svn: 47994

under modulo (overflow). Fixes PR1933.

llvm-svn: 47987