On ARM, peephole optimization for ABS creates a trivial cfg triangle which tempts machine sink to sink instructions in code which is really straight line code. Sometimes this sinking may alter register allocator input such that use and def of a reg is divided by a branch in between, which may result in extra spills. Now mahine sink avoids sinking if final sink destination is post dominator.

Radar 10266272.

llvm-svn: 146604

llvm-svn: 146603

with the correct iterator.
<rdar://problem/10530851>

llvm-svn: 146600

getStreamer().EmitBytes.  Suggestion by Benjamin Kramer!

llvm-svn: 146599

llvm-svn: 146597

freebsd bots happy. In the longer term, we should have a mechanism for moving
constexpr recursion off the call stack, to support the default limit of 512
suggested by the standard.

llvm-svn: 146596

llvm-svn: 146595

Add tests for w/ writeback instruction parsing and encoding.

llvm-svn: 146594

it to the streamer.  rdar://10383898

llvm-svn: 146592

their canonical Decl nodes. Not used yet, but it will be.

llvm-svn: 146591

llvm-svn: 146590

llvm-svn: 146589

In addition to improving the representation, this adds support for assembly
parsing of these instructions.

llvm-svn: 146588

going to be a pointer-to-member constant. Fixes <rdar://problem/10544564>.

llvm-svn: 146587

matches gcc's behavior.

Fixes PR8186.

llvm-svn: 146586

llvm-svn: 146585

LLDBSwigPythonCallCommand crashes when a command script returns an object 

Add more robustness to LLDBSwigPythonCallCommand.  It should check whether the returned Python object
is a string, and only assign it as the error msg when the check holds.
Also add a regression test.

llvm-svn: 146584

r0 = mov #0
r0 = moveq #1

Then the second instruction has an implicit data dependency on the first
instruction. Sadly I have yet to come up with a small test case that
demonstrate the post-ra scheduler taking advantage of this.

llvm-svn: 146583

I need to keep the test itself in the repository since it's the only way I can currently reproduce the issue.

llvm-svn: 146582

llvm-svn: 146580

Work in progress. Parsing for non-writeback, single spaced register lists
works now. The rest have the representations better factored, but still
need more to be able to parse properly.

llvm-svn: 146579

llvm-svn: 146578

point to ARC-managed pointers sometimes. This fixes rdar://10551239.

llvm-svn: 146577

llvm-svn: 146576

llvm-svn: 146575

I cannot reproduce the failures neither on my machine nor on the same buildbot machine (with the clang binary built on it). Let's see if it fails again..

llvm-svn: 146574

emission is not supported yet, but a patch that adds the support should follow
soon.

llvm-svn: 146572

llvm-svn: 146571

llvm-svn: 146570

llvm-svn: 146569

llvm-svn: 146568

When 'cmp rn #imm' doesn't match due to the immediate not being representable,
but 'cmn rn, #-imm' does match, use the latter in place of the former, as
it's equivalent.

rdar://10552389

llvm-svn: 146567

llvm-svn: 146566

Patch by Mathias Gaunard!

llvm-svn: 146565

members into ObjCClassDecl, saving ourselves one pointer per forward
declaration.

llvm-svn: 146564

is not visible, look for any previous declarations of that entity that
might be visible.

llvm-svn: 146563

r146430 lost some compile-time performance on MultiSource/Benchmarks/MiBench/security-rijndael; this gets most of it back.

llvm-svn: 146562

llvm-svn: 146561

To extract a preoptimized LLVM-IR file from a C-file run:

clang -Xclang -load -Xclang LLVMPolly.so -O0 -mllvm -polly file.c -S -emit-llvm

On the generated file you can directly run passes such as:
'opt -view-scops file.s'

llvm-svn: 146560

llvm-svn: 146559