This change seems to make the linker about 10% faster.
Reading symbol name is not very cheap because it needs strlen()
on the string table. We were wasting time on reading non-external
symbol names that would never be used by the linker.

llvm-svn: 239332

As an ongoing effort to sanitize the openmp code, these changes move
variables under already existing macro guards.

Patch by Jack Howarth

llvm-svn: 239331

As an ongoing effort to sanitize the openmp code, these changes remove unused variables
by adding proper macros around both variables and functions.

Patch by Jack Howarth

llvm-svn: 239330

This is a follow-up to r239325.

llvm-svn: 239329

llvm-svn: 239327

Some variables are convenient to keep around even if they aren't
really used in a release build.  This is often seen in DEBUG guarded code where the variable
is only used in a DEBUG build.

Patch by Jack Howarth

llvm-svn: 239326

on a per-function basis.

Previously some of the passes were conditionally added to ARM's pass pipeline
based on the target machine's subtarget. This patch makes changes to add those
passes unconditionally and execute them conditonally based on the predicate
functor passed to the pass constructors. This enables running different sets of
passes for different functions in the module.

rdar://problem/20542263

Differential Revision: http://reviews.llvm.org/D8717

llvm-svn: 239325

The Fragment and Section, and a bool for HasFragment were all used to create
a PointerUnion.  Just use a pointer union instead.

llvm-svn: 239324

As an ongoing effort to sanitize the openmp code, these changes remove unused functions.
The unused functions are:
__kmp_fini_allocator_thread(), __kmp_env_isDefined(), __kmp_strip_quotes(),
__kmp_convert_to_seconds(), and __kmp_convert_to_nanoseconds(). 

Patch by Jack Howarth

llvm-svn: 239323

llvm-svn: 239322

/code/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_linux.cc:971:8: error: address of function 'dl_iterate_phdr' will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion]
  if (!dl_iterate_phdr)
      ~^~~~~~~~~~~~~~~
/code/llvm/projects/compiler-rt/lib/sanitizer_common/sanitizer_linux.cc:971:8: note: prefix with the address-of operator to silence this warning
  if (!dl_iterate_phdr)
       ^
       &

llvm-svn: 239321

Some of the asan-ubsan build changes were not replicated in the android branch in CMakeLists.

llvm-svn: 239320

llvm-svn: 239318

All of ELF, COFF and MachO now manipulate the flags in helpers so we don't need
anyone to read the flags directly, but instead via those helpers.

Reviewed by Rafael Espíndola.

llvm-svn: 239317

Also delete the now unused MCMachOSymbolFlags.h header as the only enum in there was moved to MCSymbolMachO.

Similarly to ELF and COFF, manipulating the flags is now done via helpers instead of spread
throughout the codebase.

Reviewed by Rafael Espíndola.

llvm-svn: 239316

Reviewed by Rafael Espíndola.

llvm-svn: 239315

All flags setting/getting is now done in the class with helper methods instead
of users having to get the bits in the correct order.

Reviewed by Rafael Espíndola.

llvm-svn: 239314

The flags field in MCSymbol only needs to be 16-bits on ELF and MachO.
This moves the 16-bit Type out of there so that it can be reduced in size in a future commit.

Reviewed by Rafael Espíndola.

llvm-svn: 239313

Reviewed by Rafael Espíndola.

llvm-svn: 239312

Reviewed by Rafael Espíndola.

llvm-svn: 239311

llvm-svn: 239310

While we have some code to transform specification like {ax} into
{eax}/{rax} if the operand type isn't 16bit, we should reject cases
where there is no sane way to do this, like the i128 type in the
example.

Related to rdar://21042280

Differential Revision: http://reviews.llvm.org/D10260

llvm-svn: 239309

The global-merge pass was crashing because it assumes that all ConstantExprs
(reached via the global variables that they use) have at least one user.

I haven't worked out a way to test this, as an unused ConstantExpr cannot be
represented by serialised IR, and global-merge can only be run in llc, which
does not run any passes which can make a ConstantExpr dead.

This (reduced to the point of silliness) C code triggers this bug when compiled
for arm-none-eabi at -O1:

  static a = 7;
  static volatile b[10] = {&a};

  c;
  main() {
    c = 0;
    for (; c < 10;)
      printf(b[c]);
  }

Differential Revision: http://reviews.llvm.org/D10314

llvm-svn: 239308

[Hexagon] Adding functionality for searching for compound instruction pairs.  Compound instructions reduce slot resource requirements freeing those packet slots up for more instructions.

llvm-svn: 239307

This reverts commit 239219 which requires some LLVM changes I forgot to commit.

Reported-by: Marshall Clow
llvm-svn: 239306

llvm-svn: 239305

llvm-svn: 239303

This patch adds support for system register MMFR4_EL1 (memory model feature register) in the assembler.
This register provides information about the implemented memory model and memory management support.

llvm-svn: 239302

This patch adds R_MIPS_PC32 relocation for Mips64.

Patch by Vladimir Radosavljevic.

Differential Revision: http://reviews.llvm.org/D10235

llvm-svn: 239301

Implemented DAG lowering for all these forms.
Added tests for DAG lowering and encoding.

Differential Revision: http://reviews.llvm.org/D10310

llvm-svn: 239300

For GEP instructions isDereferenceablePointer checks that all indices are constant and within bounds. Replace this index calculation logic to a call to accumulateConstantOffset. Separated from the http://reviews.llvm.org/D9791

Reviewed By: sanjoy

Differential Revision: http://reviews.llvm.org/D9874

llvm-svn: 239299

llvm-svn: 239298

Summary:
Previously if an MI command had **X** mandatory and **Y** optional arguments you could provide **X** or more optional arguments without providing any of the mandatory arguments, and the argument validation code wouldn't complain.

For example this would pass argument validation even though the mandatory **address** and **count** arguments are missing:

-data-read-memory-bytes --thread 1 --frame 0

Part of the problem was that an empty string was considered a valid value for a mandatory argument, which didn't make much sense.

Patch by Vadim Macagon. Thanks!

Test Plan:
./dotest.py -A x86_64 -C clang --executable $BUILDDIR/bin/lldb tools/lldb-mi/

No unexpected failures on my Ubuntu 14.10 64bit Virtualbox VM.

Reviewers: domipheus, ki.stfu, abidh

Reviewed By: ki.stfu, abidh

Subscribers: brucem, lldb-commits

Differential Revision: http://reviews.llvm.org/D10299

llvm-svn: 239297

llvm-svn: 239296

Summary:
We need to add a runtime memcheck for pair of accesses (x,y) where at least one of x and y
are writes.
 
Assuming we have w writes and r reads, currently this number is  estimated as being
w* (w+r-1). This estimation will count (write,write) pairs twice and will overestimate
the number of checks required.

This change adds a getNumberOfChecks method to RuntimePointerCheck, which
will count the number of runtime checks needed (similar in implementation to
needsAnyChecking) and uses it to produce the correct number of runtime checks.

Test Plan:
llvm test suite
spec2k
spec2k6

Performance results: no changes observed (not surprising since the formula for 1 writer is basically the same, which would covers most cases - at least with the current check limit).

Reviewers: anemet

Reviewed By: anemet

Subscribers: mzolotukhin, llvm-commits

Differential Revision: http://reviews.llvm.org/D10217

llvm-svn: 239295

[CodeGen] Reuse stack space from unused function results (with more accurate unused result detection)

This patch fixes issues with unused result detection which were found in patch http://reviews.llvm.org/D9743.

Differential Revision: http://reviews.llvm.org/D10042

llvm-svn: 239294

llvm-svn: 239293

MSVC profiler reported that this stable_sort takes 7% time
when self-linking. As a result, createSection was taking 10% time.
Now createSection takes 3%. This small change actually makes
the linker a bit but perceptibly faster.

llvm-svn: 239292

Interleaved memory accesses are grouped and vectorized into vector load/store and shufflevector.
E.g. for (i = 0; i < N; i+=2) {
       a = A[i];         // load of even element
       b = A[i+1];       // load of odd element
       ...               // operations on a, b, c, d
       A[i] = c;         // store of even element
       A[i+1] = d;       // store of odd element
     }

  The loads of even and odd elements are identified as an interleave load group, which will be transfered into vectorized IRs like:
     %wide.vec = load <8 x i32>, <8 x i32>* %ptr
     %vec.even = shufflevector <8 x i32> %wide.vec, <8 x i32> undef, <4 x i32> <i32 0, i32 2, i32 4, i32 6>
     %vec.odd = shufflevector <8 x i32> %wide.vec, <8 x i32> undef, <4 x i32> <i32 1, i32 3, i32 5, i32 7>

  The stores of even and odd elements are identified as an interleave store group, which will be transfered into vectorized IRs like:
     %interleaved.vec = shufflevector <4 x i32> %vec.even, %vec.odd, <8 x i32> <i32 0, i32 4, i32 1, i32 5, i32 2, i32 6, i32 3, i32 7> 
     store <8 x i32> %interleaved.vec, <8 x i32>* %ptr

This optimization is currently disabled by defaut. To try it by adding '-enable-interleaved-mem-accesses=true'. 

llvm-svn: 239291

This is NFC but makes log message a bit nicer because it doesn't
append .\ (or ./ on Unix) to files in the current directory.

llvm-svn: 239290