push onto the top of the stack like x86, which uses the local area
offset.  This will allow the removal of PowerPCPEI.cpp soon.

llvm-svn: 15573

llvm-svn: 15571

dangling constant users were removed from a function, causing it to be dead,
we never removed the call graph edge from the external node to the function.

In most cases, this didn't cause a problem (by luck).  This should definitely
go into 1.3

llvm-svn: 15570

llvm-svn: 15569

1. Fix a REALLY nasty cyclic replacement issue that Anshu discovered, causing
   nondeterminstic crashes and memory corruption.
2. For performance, don't go inserting constantexpr casts of GV pointers.

This should definitely go into 1.3

llvm-svn: 15568

should go into 1.3

llvm-svn: 15567

for this information as it belongs in a larger document on the subject of
llvmc.

llvm-svn: 15566

been initialized.

llvm-svn: 15565

llvm-svn: 15564

llvm-svn: 15563

llvm-svn: 15562

aimed more at the comiler writer than the llvmc user later in the document.

llvm-svn: 15561

llvm-svn: 15555

llvm-svn: 15553

being documented before being written to foster discussion about what the
tool should do. Eventually, we'll achieve a decision point at which time
this document forms the requirements for the tool from which it will be
coded.

llvm-svn: 15552

llvm-svn: 15543

llvm-svn: 15537

Changes commited for Nate Begeman:

Use a PowerPC specific prolog epilog inserter to control where spilled
callee save regs are placed on the stack.
Get rid of implicit return address stack slot, save return address reg
(LR) in appropriate slot
Improve code generated for functions that don't have calls or access
globals


Note from Chris: PowerPCPEI will eventually be eliminated, once the
functionality is merged into CodeGen/PrologEpilogInserter.cpp

llvm-svn: 15536

llvm-svn: 15535

assume Louis also holds copyright.

llvm-svn: 15534

llvm-svn: 15533

* Wrap long lines to 80 cols

llvm-svn: 15532

Thanks Nate!

llvm-svn: 15531

llvm-svn: 15530

llvm-svn: 15529

llvm-svn: 15527

llvm-svn: 15526

llvm-svn: 15525

* Fit used libraries on a few lines

llvm-svn: 15524

llvm-svn: 15522

llvm-svn: 15521

incorrect type.

llvm-svn: 15519

llvm-svn: 15516

llvm-svn: 15515

llvm-svn: 15514

llvm-svn: 15513

rid of compilation warnings on some platforms.

llvm-svn: 15512

nonunifiable types but the same name.  Down with PR411!

llvm-svn: 15511

llvm-svn: 15510

llvm-svn: 15509