common transformations. This includes updating repairIntervalsInRange() to
handle more cases.

llvm-svn: 175604

correct value is needed in every iteration of the loop for updating
LiveIntervals.

llvm-svn: 175603

and removing instructions. The implementation seems more complicated than it
needs to be, but I couldn't find something simpler that dealt with all of the
corner cases.

Also add a call to repairIndexesInRange() from repairIntervalsInRange().

llvm-svn: 175601

after the two-address pass. The remaining problems in 'make check' are occurring
later.

llvm-svn: 175598

llvm-svn: 175597

llvm-svn: 175596

llvm-svn: 175581

Target implementations of getRegAllocationHints() should use the
provided allocation order, and they can never return hints outside the
order. This is already documented in TargetRegisterInfo.h.

<rdar://problem/13240556>

llvm-svn: 175540

Due to the execution order of doFinalization functions, the GC information were
deleted before AsmPrinter::doFinalization was executed. Thus, the
GCMetadataPrinter::finishAssembly was never called.

The patch fixes that by moving the code of the GCInfoDeleter::doFinalization to
Printer::doFinalization.

llvm-svn: 175528

llvm-svn: 175490

llvm-svn: 175488

llvm-svn: 175487

llvm-svn: 175485

llvm-svn: 175484

llvm-svn: 175457

llvm-svn: 175456

[ms-inline asm] Fix undefined behavior to reset hasMSInlineAsm in advance of SelectAllBasicBlocks().

llvm-svn: 175422

arguably better than forward iterators for this use case, they are confusing and
there are some implementation problems with reverse iterators and MI bundles.

llvm-svn: 175393

llvm-svn: 175385

MachineBasicBlock::SplitCriticalEdge. Since this is an iterator rather than
an instr_iterator, the isBundled() check only passes if getFirstTerminator()
returned end() and the garbage memory happens to lean that way.

Multiple successors can be present without any terminator instructions in the
case of exception handling with a fallthrough.

llvm-svn: 175383

terminators that actually have register uses when splitting critical edges.

This commit also introduces a method repairIntervalsInRange() on LiveIntervals,
which allows for repairing LiveIntervals in a small range after an arbitrary
target hook modifies, inserts, and removes instructions. It's pretty limited
right now, but I hope to extend it to support all of the things that are done
by the convertToThreeAddress() target hooks.

llvm-svn: 175382

This avoids unnecessary copies. No functionality change.

llvm-svn: 175367

No functionality change.

llvm-svn: 175366

llvm-svn: 175365

updateScheduledPressure method.

llvm-svn: 175362

If the frame pointer is omitted, and any stack changes occur in the inline
assembly, e.g.: "pusha", then any C local variable or C argument references
will be incorrect.  

I pass no judgement on anyone who would do such a thing. ;)
rdar://13218191

llvm-svn: 175334

If two functions require different features (e.g., `-mno-sse' vs. `-msse') then
we want to honor that, especially during LTO. We can do that by resetting the
subtarget's features depending upon the 'target-feature' attribute.

llvm-svn: 175314

- add sincos to runtime library if target triple environment is GNU
- added canCombineSinCosLibcall() which checks that sincos is in the RTL and
  if the environment is GNU then unsafe fpmath is enabled (required to
  preserve errno)
- extended sincos-opt lit test

Reviewed by: Hal Finkel

llvm-svn: 175283

llvm-svn: 175264

llvm-svn: 175190

Add some legality checks for SETCC before introducing it in the DAG combiner post-operand legalization.

llvm-svn: 175149

register class to match the defining instruction.

llvm-svn: 175130

CoalescerPairs. Also, make it take a CoalescerPair directly like other methods
of RegisterCoalescer.

llvm-svn: 175123

of the copy is a subregister def. The current code assumes that it can do a full
def of the destination register, but it is not checking that the def operand is
read-undef. It also doesn't clear the subregister index of the destination in
the new instruction to reflect the full subregister def.

These issues were found running 'make check' with my next commit that enables
rematerialization in more cases.

llvm-svn: 175122

Remove dead functions: renameRegister
Move private member variables from LDV to Impl
Remove ssp/uwtable from testing case

llvm-svn: 175072

llvm-svn: 175067

llvm-svn: 175024

RegisterCoalescer used to depend on LiveDebugVariable. LDV removes DBG_VALUEs
without emitting them at the end.

We fix this by removing LDV from RegisterCoalescer. Also add an assertion to
make sure we call emitDebugValues if DBG_VALUEs are removed at
runOnMachineFunction.

rdar://problem/13183203
Reviewed by Andy & Jakob

llvm-svn: 175023

Add static cast to unsigned char whenever a character classification function is called with a signed char argument, in order to avoid assertions in Windows Debug configuration.

llvm-svn: 175006

option "generate-dwarf-pubnames" to control it, set to "false" by default.

llvm-svn: 174981