These intervals are allocatable immediately after splitting, but they may be
evicted because of later splitting. This is rare, but when it happens they
should be split again.

The remainder intervals that cannot be allocated after splitting still move
directly to spilling.

SplitEditor::finish can optionally provide a mapping from new live intervals
back to the original interval indexes returned by openIntv().

Each original interval index can map to multiple new intervals after connected
components have been separated. Dead code elimination may also add existing
intervals to the list.

The reverse mapping allows the SplitEditor client to treat the new intervals
differently depending on the split region they came from.

llvm-svn: 129925

MC :-)

llvm-svn: 129923

llvm-svn: 129922

llvm-svn: 129921

which broke a couple GCC test suite tests at -O0.

llvm-svn: 129914

llvm-svn: 129913

This patch depends on the prior fix r129908 that changes to use std::find,
rather than std::binary_search, on unordered array.

Patch by Dan Bailey

llvm-svn: 129909

llvm-svn: 129908

These values were not used for anything. Spill size and alignment is a property
of the register class, not the register.

llvm-svn: 129906

necessary since gcov counts transitions between blocks. It can't see if you've
run every line in a straight-line function, so we add an edge for it to notice.

llvm-svn: 129905

comment for 80 columns.

llvm-svn: 129904

instrument the program to emit .gcda.
TODO: we should emit slightly different .gcda files when .gcno emission is off.

llvm-svn: 129903

llvm-svn: 129902

docs/llvm.css: Introduce cascading style <div> and <p> continued on <h[2-5]>. For now, it is applied in AliasAnalysis.html and ReleaseNotes.html.

<h2>Section Example</h2>
<div> <!-- h2+div is applied -->
<p>Section preamble.</p>

<h3>Subsection Example</h3>
<p> <!-- h3+p is applied -->
Subsection body
</p>

<!-- End of section body -->
</div>

llvm-svn: 129901

llvm-svn: 129900

llvm-svn: 129888

llvm-svn: 129884

llvm-svn: 129883

TII::isTriviallyReMaterializable() shouldn't depend on any properties of the
register being defined by the instruction. Rematerialization is going to create
a new virtual register anyway.

llvm-svn: 129882

generated by llvm-gcc, since llvm-gcc uses 2 i64s for passing a 4 x float
vector on ARM rather than an i64 array like Clang.

llvm-svn: 129878

delete it.

llvm-svn: 129877

more cases.

llvm-svn: 129876

llvm-svn: 129875

http://google1.osuosl.org:8011/builders/llvm-x86_64-linux-checks/builds/825/steps/test.llvm.stage2/logs/st.ll

llvm-svn: 129869

On the x86-64 and thumb2 targets, some registers are more expensive to encode
than others in the same register class.

Add a CostPerUse field to the TableGen register description, and make it
available from TRI->getCostPerUse. This represents the cost of a REX prefix or a
32-bit instruction encoding required by choosing a high register.

Teach the greedy register allocator to prefer cheap registers for busy live
ranges (as indicated by spill weight).

llvm-svn: 129864

llvm-svn: 129862

llvm-svn: 129858

llvm-svn: 129852

     used by Clang.  To help Clang integration, the PTX target has been split
     into two targets: ptx32 and ptx64, depending on the desired pointer size.

- Add GCCBuiltin class to all intrinsics
- Split PTX target into ptx32 and ptx64

llvm-svn: 129851

llvm-svn: 129850

Patched by Dan Bailey

llvm-svn: 129848

Patched by Dan Bailey

llvm-svn: 129847

Patched by Dan Bailey

llvm-svn: 129846

llvm is built with unsigned chars where an immediate such as 0xff would be zero
extended to 64-bits, turning "cmp $0xff,%eax" into
"cmp $0xffffffffffffffff,%eax".

llvm-svn: 129845

llvm-svn: 129844

manually and pass all (now) 4 arguments to the mul libcall. Add a new
ExpandLibCall for just this (copied gratuitously from type legalization).

Fixes rdar://9292577

llvm-svn: 129842

llvm-svn: 129841

MCInst operands for ARM.  This allows it to be
more tolerant of malformed MCInsts or incorrect
instruction metadata.

llvm-svn: 129840

triple component.

llvm-svn: 129838

llvm-svn: 129837