Add a test case to show fewer instructions are needed to load an immediate
with the new way of loading immediates.

llvm-svn: 148908

Original log:
    Introduce a new ConstantVector::getSplat constructor function to
    simplify a really common case.

llvm-svn: 148906

simplify a really common case.

llvm-svn: 148901

load an immediate. 

llvm-svn: 148900

did something extremely surprising, and shadowed actually useful 
implementations that had completely different behavior.

llvm-svn: 148898

llvm-svn: 148897

llvm-svn: 148884

llvm-svn: 148883

llvm-svn: 148882

llvm-svn: 148881

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: 148856

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

This will interleave the elements from two or more lists.

llvm-svn: 148824

dealing in the host triple, be honest about it and document the decision
to default the target triple to the host triple unless overridden.

llvm-svn: 148822

llvm-svn: 148821

llvm-svn: 148820

llvm-svn: 148819

llvm-svn: 148818

llvm-svn: 148817

llvm-svn: 148815

llvm-svn: 148809

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