llvm-svn: 148897

llvm-svn: 148884

llvm-svn: 148883

llvm-svn: 148882

A REG_SEQUENCE instruction is lowered into a sequence of partial defs:

  %vreg7:ssub_0<def,undef> = COPY %vreg20:ssub_0
  %vreg7:ssub_1<def> = COPY %vreg2
  %vreg7:ssub_2<def> = COPY %vreg2
  %vreg7:ssub_3<def> = COPY %vreg2

The first def needs an <undef> flag to indicate it is the beginning of
the live range, while the other defs are read-modify-write.  Previously,
we depended on LiveIntervalAnalysis to notice and fix the missing
<def,undef>, but that solution was never robust, it was causing problems
with ProcessImplicitDefs and the lowering of chained REG_SEQUENCE
instructions.

This fixes PR11841.

llvm-svn: 148879

llvm-svn: 148878

which is what N32/64 does.

llvm-svn: 148875

llvm-svn: 148871

llvm-svn: 148869

When not using subsections via symbols, the assembler can resolve
symbol differences (including pcrel references) to non-local
labels at assembly time, not just those in the same atom.

llvm-svn: 148865

llvm-svn: 148864

llvm-svn: 148862

llvm-svn: 148849

llvm-svn: 148846

llvm-svn: 148836

Widen the instruction encoder that TblGen emits to a 64 bits, which should accomodate every target I can think of offhand.

llvm-svn: 148833

llvm-svn: 148832

llvm-svn: 148825

llvm-svn: 148821

llvm-svn: 148819

llvm-svn: 148818

llvm-svn: 148815

llvm-svn: 148806

llvm-svn: 148805

add a ConstantDataArray::getString method that corresponds to the (to be
removed) StringRef version of ConstantArray::get, but is dramatically more 
efficient.

llvm-svn: 148804

  v8i16 -> v8i32, v4i32 -> v4i64 - used vpunpck* instructions.

llvm-svn: 148803

llvm-svn: 148802

This change adds an new option --arm-enable-ehabi-descriptors that
enables emitting unwinding descriptors. This provides a mode with a
working backtrace() without the (currently broken) exception support.

llvm-svn: 148800

16 bits are sufficient to store attributes, tags and forms.

llvm-svn: 148799

Saves about 1.5% on debug info size.

rdar://10278198

llvm-svn: 148794

and clean up some other misc stuff.  Unlike ConstantArray, we will
prefer to emit .fill directives for "String" arrays that all have
the same value, since they are denser than emitting a .ascii

llvm-svn: 148793

same semantics as ConstantArray's but much more efficient because they
don't have to return std::string's.  The ConstantArray methods will
eventually be removed.

llvm-svn: 148792

llvm-svn: 148790

instead of its own hard coded thing, allowing it to handle 
ConstantDataSequential and fixing some obscure bugs (e.g. it would
previously crash on a CAZ of vector type).

llvm-svn: 148788

out into a new ConstantFoldLoadThroughGEPIndices (more useful) function
and rewrite it to be simpler, more efficient, and to handle the new
ConstantDataSequential type.

Enhance ConstantFoldLoadFromConstPtr to handle ConstantDataSequential.

llvm-svn: 148786

Make some CDS methods public.

llvm-svn: 148785

This pacifies machine verifier

llvm-svn: 148782

This won't have an effect until EliminateRegSequences() starts setting
the undef flags.

llvm-svn: 148779

No need for 'getOperand' :)

llvm-svn: 148778

Add comments near load pattern fragments indicating that all integer vector loads are promoted to v2i64 or v4i64 so that no one tries to reintroduce pattern fragments for other types.

llvm-svn: 148771