Livein copy scheduling fixes: do not coalesce physical register copies, correctly determine the safe location to insert the copies.

llvm-svn: 48348

llvm-svn: 48347

llvm-svn: 48346

llvm-svn: 48345

llvm-svn: 48344

pointer bitcast when performing return slot optimization.

llvm-svn: 48343

Patch by Julien Lerouge. Thanks!

llvm-svn: 48342

llvm-svn: 48341

Thanks Daniel Dunbar!

llvm-svn: 48340

to be run on other declarations of blocks of code (e.g., Objective-C methods.)

llvm-svn: 48339

llvm-svn: 48338

llvm-svn: 48337

Don't try to sink 3-address instruction if convertToThreeAddress created more than one instructions.

llvm-svn: 48336

llvm-svn: 48335

llvm-svn: 48334

TwoAddressInstructionPass enhancement. After it converts a two address instruction into a 3-address one, sink it past the instruction that kills the read-mod-write register if its definition is used past the kill. This reduces the number of live register by one.

llvm-svn: 48333

llvm-svn: 48332

This still isn't right, but is slightly nicer.

llvm-svn: 48331

Set the start of DeclStmt range.  Right now the end is meaningless 
though.

llvm-svn: 48330

Get rid of a pseudo instruction and replace it with subreg based operation on real instructions, ridding the asm printers of the hack used to do this previously. In the process, update LowerSubregs to be careful about eliminating copies that have side affects. 

Note: the coalescer will have to be careful about this too, when it starts coalescing insert_subreg nodes.
llvm-svn: 48329

llvm-svn: 48328

llvm-svn: 48327

llvm-svn: 48326

llvm-svn: 48325

llvm-svn: 48324

llvm-svn: 48323

we gracefully back out and return NULL for the CFG, allowing clients to skip
analyzing functions with these CFGs. We will add support later.

Modified base ASTConsumer "CFGVisitor" to detect when a CFG is not constructed
and to emit a warning.

llvm-svn: 48322

llvm-svn: 48321

successors. This makes it support nounwind.

llvm-svn: 48320

llvm-svn: 48319

llvm-svn: 48318

llvm-svn: 48317

llvm-svn: 48316

Pass* to PMDataManager*. PMDataManager is more specific than Pass,
so this more accurately describes the objects that are being stored.

This eliminates the need for several dynamic_casts to PMDataManager*.
It does introduce one dynamic_cast though, in dumpPasses(). Give
this one a comment describing why a dynamic_cast is being used.

llvm-svn: 48315

a Pass*. PMDataManager* is what it actually holds, so this
makes it clearer.

llvm-svn: 48314

llvm-svn: 48313

llvm-svn: 48312

llvm-svn: 48311

calls here.  This was done earlier for params in
the varargs part of the params; any float params
that survive to here are in the non-varargs part,
and must not be promoted.

llvm-svn: 48310

- For explicit ivar refers, make sure the cast is propagated to the AST.
- Don't free the base (since it is still in use).
This fixes the recent regression to test/Rewriter/objc-ivar-receiver-1.m.

llvm-svn: 48309