Use DW_FORM_data2 for DW_AT_language and let users use DW_LANG_lo_user=0x8000 to DW_LANG_hi_user=0xffff range.

llvm-svn: 126339

enabled for all targets. Non-X86 targets should not have this behavior
enabled by default.

Joerg, if you would like to resubmit with the behavior conditionalized to be
X86-ELF only, that's fine.

llvm-svn: 126336

Fixes PR9292.

llvm-svn: 126330

llvm-svn: 126322

events on the thread and wait until a resource is ready to event. The vector
of the resource that is ready is returned.

llvm-svn: 126320

No code will be inserted after the split point anyway.

llvm-svn: 126319

llvm-svn: 126315

llvm-svn: 126314

llvm-svn: 126313

it to ignore valid uses of FS and GS as additional
base registers in address computations.  Added a test
case for this.

llvm-svn: 126302

llvm-svn: 126298

r124468.  Patch by Rafael Avila de Espindola!

llvm-svn: 126297

The previous codegen for the slow path (when values are in VFP / NEON
registers) was incorrect if the source is NaN.

The new codegen uses NEON vbsl instruction to copy the sign bit. e.g.
        vmov.i32        d1, #0x80000000
        vbsl    d1, d2, d0
If NEON is not available, it uses integer instructions to copy the sign bit.
rdar://9034702

llvm-svn: 126295

When a large live range is evicted, it will usually be split when it comes
around again. By deferring evicted live ranges, the splitting happens at a time
when the interference pattern is more realistic. This prevents repeated
splitting and evictions.

llvm-svn: 126282

llvm-svn: 126277

Use interval sizes instead of spill weights to determine if it is legal to evict
interference. A smaller interval can evict interference if all interfering live
ranges are larger.

Allow multiple interferences to be evicted as along as they are all larger than
the live range being allocated.

Spill weights are still used to select the preferred eviction candidate.

llvm-svn: 126276

[AVX] General VUNPCKL codegen support.

llvm-svn: 126264

This is based on the observation that long live ranges are more difficult to
allocate, so there is a better chance of solving the puzzle by handling the big
pieces first. The allocator will evict and split long alive ranges when they get
in the way.

RABasic is still using spill weights for its priority queue, so the interface to
the queue has been virtualized.

llvm-svn: 126259

llvm-svn: 126258

values from all of the loop's exiting blocks are equal. Patch by Andrew Clinton.

llvm-svn: 126253

llvm-svn: 126244

llvm-svn: 126238

clang uses DBuilder, so it requries corresponding change.

llvm-svn: 126231

llvm-svn: 126226

parser.

llvm-svn: 126225

share entries. Add a DenseSet to MachineConstantPool for the MachineCPVs that
it owns.

This will hopefully fix the MC/ARM/elf-reloc-01.ll failure on the leaks bots.

llvm-svn: 126218

llvm-svn: 126192

llvm-svn: 126191

Apparently it's ok for multiple operands to "kill" the same register.
Fixes PR9237.

llvm-svn: 126190

llvm-svn: 126185

up by the dynamic linker, but it's better to use the correct instruction
to begin with.

Fixes rdar://9011034

llvm-svn: 126176

at phis. This enables us to eliminate a lot of pointless zexts during the DAGCombine
phase. This fixes <rdar://problem/8760114>.

llvm-svn: 126170

allows for the information propagated across basic blocks to be merged at phis.

llvm-svn: 126169

From Dimitry Andric.

llvm-svn: 126168

Patch by Jai Menon.

llvm-svn: 126165

llvm-svn: 126163

Skipping over debugvalue instructions to determine whether the split spot is in a IT block. rdar://9030770

llvm-svn: 126159

llvm-svn: 126158

llvm-svn: 126157

In other words, do not keep track of argument's location.  The debugger (gdb) is not prepared to see line table entries for arguments. For the debugger, "second" line table entry marks beginning of function body.
This requires some coordination with debugger to get this working. 
 - The debugger needs to be aware of prolog_end attribute attached with line table entries.
 - The compiler needs to accurately mark prolog_end in line table entries (at -O0 and at -O1+)

llvm-svn: 126155