to LLVM IR changes with addr label weirdness.  In the testcase, we
generate references to the two bb's when codegen'ing the first
function:

_test1:                                 ## @test1
	leaq	Ltmp0(%rip), %rax
..
	leaq	Ltmp1(%rip), %rax

Then continue to codegen the second function where the blocks
get merged.  We're now smart enough to emit both labels, producing
this code:

_test_fun:                              ## @test_fun
## BB#0:                                ## %entry
Ltmp1:                                  ## Block address taken
Ltmp0:
## BB#1:                                ## %ret
	movl	$-1, %eax
	ret

Rejoice.

llvm-svn: 98595

label is generated, but then the block is deleted.  Since the
value is undefined, we just emit the label right after the entry 
label of the function.  It might matter that the label is in the
same section as the function was afterall.

llvm-svn: 98579

This is a work in progress.

llvm-svn: 98556

llvm-svn: 98526

label instead of trying to form one based on the BB name (which
causes collisions if the name is empty).  This fixes PR6608

llvm-svn: 98495

to get unique assembler temporary labels.

llvm-svn: 98489

llvm-svn: 98485

llvm-svn: 98484

llvm-svn: 98483

contain an MCSymbol instead of a label index.

llvm-svn: 98482

with an MCSymbol instead of an immediate.

llvm-svn: 98481

llvm-svn: 98477

llvm-svn: 98474

llvm-svn: 98471

llvm-svn: 98470

an MCSymbol.  Make the EH_LABEL MachineInstr hold its label
with an MCSymbol instead of ID.  Fix a bug in MMI.cpp which
would return labels named "Label4" instead of "label4".

llvm-svn: 98463

consistently use MCSymbol and only call this predicate after
they should have been emitted.

llvm-svn: 98461

instead of label ID's.  This cleans up and regularizes a bunch 
of code and makes way for future progress.

Unfortunately, this pointed out to me that JITDwarfEmitter.cpp
is largely copy and paste from DwarfException/MachineModuleInfo
and other places.  This is very sad and disturbing. :(

One major change here is that TidyLandingPads moved from being
called in DwarfException::BeginFunction to being called in
DwarfException::EndFunction.  There should not be any 
functionality change from doing this, but I'm not an EH expert.

llvm-svn: 98459

llvm-svn: 98451

and passing off ownership to AsmPrinter.  Now MachineModuleInfo
creates it and owns it by value.  This allows us to use MCSymbols
more consistently throughout the rest of the code generator, and
simplifies a bit of code.  This also allows MachineFunction to 
keep an MCContext reference handy, and cleans up the TargetRegistry
interfaces for AsmPrinters.

llvm-svn: 98450

instead of as a stem+idx pair, simplify the "is a new 
location" check to use symbol comparison.

llvm-svn: 98432

llvm-svn: 98429

llvm-svn: 98426

entries to not thrash std::strings and MCSymbols.

llvm-svn: 98415

llvm-svn: 98392

some of its callers.

llvm-svn: 98388

llvm-svn: 98378

for a global instead of messing around with string buffers.

llvm-svn: 98366

llvm-svn: 98365

No functionality change.

llvm-svn: 98363

by A.Mazur!

llvm-svn: 98360

several fields to make it easier to figure out where bugs might be creeping in.

llvm-svn: 98358

llvm-svn: 98302

where we used ot create an MCSymbol for ".".  Now emit an assembler
temporary label and reference it instead of "." textually.

rdar://7739457

llvm-svn: 98292

an MCExpr and not an MCSymbol.  Change it to take an MCStreamer,
which is currently unused.

No functionality change.

llvm-svn: 98278

llvm-svn: 98268

are inside the function by the target at the point of use.

llvm-svn: 98255

semantic instead of syntactic.  This completes MCization of
darwin/x86[-64]!

llvm-svn: 98145

for darwin/x86 to be completely mcized.

llvm-svn: 98130

llvm-svn: 98125