I think it's almost impossible to fold atomic fences profitably under
LLVM/C++11 semantics. As a result, this is now unused and just
cluttering up the target interface.

llvm-svn: 179940

llvm-svn: 179939

This is part of a future patch to use yamlio that incorrectly ended up in a
cleanup patch.

Thanks to Benjamin Kramer for reporting it.

llvm-svn: 179938

llvm-svn: 179937

llvm-svn: 179936

Avoids a couple of copies and allows more flexibility in the clients.

llvm-svn: 179935

Sourcery CodeBench and modern FSF Mips toolchains require a bit more
complicated algorithm to calculate headers, libraries and sysroot paths
than implemented by Clang driver now. The main problem is that all these
paths depend on a set of command line arguments additionally to a target
triple value. For example, let $TC is a toolchain installation directory.
If we compile big-endian 32-bit mips code, crtbegin.o is in the
$TC/lib/gcc/mips-linux-gnu/4.7.2 folder and the toolchain's linker requires
--sysroot=$TC/mips-linux-gnu/libc argument. If we compile little-endian
32-bit soft-float mips code, crtbegin.o is in the
$TC/lib/gcc/mips-linux-gnu/4.7.2/soft-float/el folder and the toolchain's
linker requires --sysroot=$TC/mips-linux-gnu/libc/soft-float/el argument.

1. Calculate MultiarchSuffix using all necessary command line options and
   use this MultiarchSuffix to detect crtbegin.o location in the
   GCCInstallationDetector::ScanLibDirForGCCTriple() routine.
2. If a user does not provide --sysroot argument to the driver explicitly,
   calculate new sysroot value based on command line options. Then use this
   calculated sysroot path:
   a. To populate a file search paths list in the Linux::Linux() constructor.
   b. To find Mips toolchain specific include headers directories
      in the Linux::AddClangSystemIncludeArgs() routine.
   c. To provide -–sysroot argument for a linker.

Note:
- The FSF's tree slightly differs (folder names) and is not supported
  yet.
- New addExternCSystemIncludeIfExits() routine is a temporary solution.
  I plan to move path existence check to the addExternCSystemInclude()
  routine by a separate commit.

The patch reviewed by Rafael Espindola.
http://llvm-reviews.chandlerc.com/D644

llvm-svn: 179934

SLPVectorizer: Reduce the compile time by eliminating the search for some of the more expensive patterns. After this change will only check basic arithmetic trees that start at cmpinstr.

llvm-svn: 179933

llvm-svn: 179932

llvm-svn: 179931

llvm-svn: 179930

llvm-svn: 179929

llvm-svn: 179928

llvm-svn: 179927

The getSwappedPredicate function can be used in other places (such as in
improvements to the PPCCTRLoops pass). Instead of trapping it as a static
function in PPCInstrInfo, move it into PPCPredicates with other
predicate-related things.

No functionality change intended.

llvm-svn: 179926

Add CodeGen support for functions that always return arguments via a new parameter attribute 'returned', which is taken advantage of in target-independent tail call opportunity detection and in ARM call lowering (when placed on an integral first parameter).

llvm-svn: 179925

Allow tail call opportunity detection through nested and/or multiple iterations of extractelement/insertelement indirection

llvm-svn: 179924

llvm-svn: 179923

llvm-svn: 179922

llvm-svn: 179921

* using namespace llvm.
* whitespace.
* early return.

llvm-svn: 179920

and persistent variables so that they are not
treated as remaining in the target process (i.e.,
having live data) when the process does not allow
persistent allocations (e.g., when there is no
process or in the case of kernel core files).

llvm-svn: 179919

llvm-svn: 179918

Instead, use MappingNormalization to directly parse COFF::header. Also change
the naming convention of the helper classes to be a bit shorter.

llvm-svn: 179917

Introduce a new helper function, which computes the first symbolic region in
the base region chain. The corresponding symbol has been used for assuming that
a pointer is null. Now, it will also be used for checking if it is null.

This ensures that we are tracking a null pointer correctly in the BugReporter.

llvm-svn: 179916

llvm-svn: 179915

llvm-svn: 179914

llvm-svn: 179913

Fixed the GDB remote with the python OS plug-in to not show core threads when they aren't desired and also to have the threads "to the right thing" when continuing.

llvm-svn: 179912

llvm-svn: 179911

llvm-svn: 179910

llvm-svn: 179909

llvm-svn: 179908

rdar://13647445

llvm-svn: 179907

llvm-svn: 179906

The logic that actually compares the types considers pointers and integers the
same if they are of the same size. This created a strange mismatch between hash
and reality and made the test case for this fail on some platforms (yay,
test cases).

llvm-svn: 179905

realpathing the executable binary if we fail to find a
binary and if it starts with a ~ character, based on feedback
from Greg Clayton.

llvm-svn: 179904

llvm-svn: 179903

trying to move as much FastISel logic as possible out of the main path in
SelectionDAGISel - intermixing them just adds confusion.

llvm-svn: 179902

llvm-svn: 179901