implement it.

llvm-svn: 94521

EK_LabelDifference32 kind and the target has .set support.  Simplify
X86AsmPrinter::printPICJumpTableSetLabel to make use of recent helpers.

llvm-svn: 94518

make it private and non-virtual.  It handles the non-pic
case too, so just use it, simplifying EmitJumpTableInfo.

llvm-svn: 94517

jump table entry kind, instead of overloading 
AsmPrinter::printPICJumpTableEntry.

This has a pretty horrible and inefficient FIXME around how @GOTOFF
is currently smashed into the mcsymbol name, but otherwise this is
much cleaner.

llvm-svn: 94516

the AsmPrinter::GetMBBSymbol.

llvm-svn: 94515

* Fixed a reduction bug which occasionally led to infinite-cost (invalid)
  register allocation solutions despite the existence finite-cost solutions.
* Significantly reduced memory usage (>50% reduction).
* Simplified a lot of the solver code.

llvm-svn: 94514

have trouble with an intermediate add overflowing. Also, be more conservative
about the case where the induction variable in an SLT loop exit can step past
the RHS of the SLT and overflow in a single step.

Make getSignedRange more aggressive, to recover for some common cases which
the above fixes pessimized.

This addresses rdar://7561161.

llvm-svn: 94512

AsmPrinter::SetupMachineFunction sets it.  Note that systemz
and msp430 didn't.  Yay for reduced inconsistency! :)

llvm-svn: 94510

MachineFunctionAnalysis dole them out, instead of having
AsmPrinter do both.  Have the AsmPrinter::SetupMachineFunction
method set the 'AsmPrinter::MF' variable.

llvm-svn: 94509

llvm-svn: 94507

llvm-svn: 94506

jump table entries.

llvm-svn: 94505

llvm-svn: 94502

JITInfo::getPICJumpTableEntry can probably be removed now, but I don't plan to do 
this.

llvm-svn: 94501

instead of magic variables.

llvm-svn: 94500

In mem2reg, for all alloca/stores that get promoted where the alloca has an associated llvm.dbg.declare instrinsic, insert an llvm.dbg.var intrinsic before each store.

llvm-svn: 94493

Add MDNode::getIfExists(), an efficient way to determine if a value is used by metadata (since metadata does not appear in a value's use list)

llvm-svn: 94492

llvm-svn: 94491

llvm-svn: 94490

llvm-svn: 94489

TargetAsmLexer.

llvm-svn: 94482

dbg.declare's we currently generate go through both
register allocators without perturbing the results.

llvm-svn: 94480

llvm-svn: 94479

llvm-svn: 94477

llvm-svn: 94475

entries with @GOTOFF whih is EK_GPRel32BlockAddress.

llvm-svn: 94474

llvm-svn: 94472

1. MachineJumpTableInfo is now created lazily for a function the first time
   it actually makes a jump table instead of for every function.
2. The encoding of jump table entries is now described by the
   MachineJumpTableInfo::JTEntryKind enum.  This enum is determined by the
   TLI::getJumpTableEncoding() hook, instead of by lots of code scattered
   throughout the compiler that "knows" that jump table entries are always
   32-bits in pic mode (for example).
3. The size and alignment of jump table entries is now calculated based on
   their kind, instead of at machinefunction creation time.

Future work includes using the EntryKind in more places in the compiler,
eliminating other logic that "knows" the layout of jump tables in various
situations.

llvm-svn: 94470

a null pointer for functions with no jump tables.  No functionality
change.

llvm-svn: 94469

when we don't have one laying around.  Useful if you don't
have an llvmcontext handy.

llvm-svn: 94468

llvm-svn: 94465

llvm-svn: 94464

llvm-svn: 94457

TargetAsmLexer.  Dialect-specific lexing code will
be placed in the functions LexTokenATT() and
LexTokenIntel().

llvm-svn: 94456

llvm-svn: 94455

of a forward-reference, which doesn't use an "abbrev" encoding.

llvm-svn: 94454

llvm-svn: 94452

already checked that TmpBB->getSinglePredecessor() is non-null.

llvm-svn: 94451

llvm-svn: 94450

llvm-svn: 94449