With this patch llvm produces a weak_def_can_be_hidden for linkonce_odr
if they are also unnamed_addr or don't have their address taken.

There is not a lot of documentation about .weak_def_can_be_hidden, but
from the old discussion about linkonce_odr_auto_hide and the name of
the directive this looks correct: these symbols can be hidden.

Testing this with the ld64 in Xcode 5 linking clang reduces the number of
exported symbols from 21053 to 19049.

llvm-svn: 193718

CodeGenABITypes is a wrapper built on top of CodeGenModule that exposes
some of the functionality of CodeGenTypes (held by CodeGenModule),
specifically methods that determine the LLVM types appropriate for
function argument and return values.

I addition to CodeGenABITypes.h, CGFunctionInfo.h is introduced, and the
definitions of ABIArgInfo, RequiredArgs, and CGFunctionInfo are moved
into this new header from the private headers ABIInfo.h and CGCall.h.

Exposing this functionality is one part of making it possible for LLDB
to determine the actual ABI locations of function arguments and return
values, making it possible for it to determine this for any supported
target without hard-coding ABI knowledge in the LLDB code.

llvm-svn: 193717

Fixed the expression parser to be able to iterate across all function name matches that it finds when it is looking for the address of a function that the IR is looking for. Also taught it to deal with reexported symbols.

llvm-svn: 193716

llvm-svn: 193715

This is a preliminary step to handling type units by abstracting over
all (type or compile) units.

llvm-svn: 193714

llvm-svn: 193713

llvm-svn: 193712

llvm-svn: 193711

llvm-svn: 193710

currently supported in the ELF object writer, along with a simple test case.

llvm-svn: 193709

Inlined a copy of cxa_demangle.cpp from:

http://llvm.org/svn/llvm-project/libcxxabi/trunk/src/cxa_demangle.cpp

For systems that don't have demangling built into the system, and for systems that don't want to use the version that is installed. Defining LLDB_USE_BUILTIN_DEMANGLER in your build system allows you to use the built in demangler. This setting is curently automatically enabled for Windows builds.

llvm-svn: 193708

Fixed a warning in PlatformiOSSimulator where GetSDKDirectory was hiding recently added virtual function. Renamed GetSDKDirectory to GetSDKsDirectory to fix the issue. GetSDKsDirectory is a better fit because it finds the directory that contains all SDKs, not the current one.

llvm-svn: 193707

startswith_lower is ocassionally useful and I think worth adding.
endwith_lower is added for completeness.

Differential Revision: http://llvm-reviews.chandlerc.com/D2041

llvm-svn: 193706

llvm-svn: 193705

Fixing a problem where ValueObject::GetPointeeData() would not accept "partial" valid reads (i.e. asking for 10 items and getting only 5 back)
While suboptimal, this situation is not a flat-out failure and could well be caused by legit scenarios, such as hitting a page boundary

Among others, this allows data formatters to print char* buffers allocated under libgmalloc

llvm-svn: 193704

Replace blind store with check-before-store to avoid unnecessary memory stores.

Patch by Qin Zhao.

llvm-svn: 193703

We don't support these options, but should at least parse them.

llvm-svn: 193702

llvm-svn: 193701

llvm-svn: 193700

llvm-svn: 193699

Currently, instead of showing up as link, it is rendered as

  ...of FunctionPass <writing-an-llvm-pass-FunctionPass>. The...

PR17733. Patch by Tay Ray Chuan!

llvm-svn: 193698

llvm-svn: 193697

Fixing this Windows build error:

..\lib\Target\Mips\MipsSEISelLowering.cpp(997) : error C2027: use of undefined type 'llvm::raw_ostream'

llvm-svn: 193696

llvm-svn: 193695

the case [x, INT_MIN) was not handled optimally

llvm-svn: 193694

[mips][msa] Added support for matching bmnz, bmnzi, bmz, and bmzi from normal IR (i.e. not intrinsics)

Also corrected the definition of the intrinsics for these instructions (the
result register is also the first operand), and added intrinsics for bsel and
bseli to clang (they already existed in the backend).

These four operations are mostly equivalent to bsel, and bseli (the difference
is which operand is tied to the result). As a result some of the tests changed
as described below.

bitwise.ll:
- bsel.v test adapted so that the mask is unknown at compile-time. This stops
  it emitting bmnzi.b instead of the intended bsel.v.
- The bseli.b test now tests the right thing. Namely the case when one of the
  values is an uimm8, rather than when the condition is a uimm8 (which is
  covered by bmnzi.b)

compare.ll:
- bsel.v tests now (correctly) emits bmnz.v instead of bsel.v because this
  is the same operation (see MSA.txt).

i8.ll
- CHECK-DAG-ized test.
- bmzi.b test now (correctly) emits equivalent bmnzi.b with swapped operands
  because this is the same operation (see MSA.txt).
- bseli.b still emits bseli.b though because the immediate makes it
  distinguishable from bmnzi.b.

vec.ll:
- CHECK-DAG-ized test.
- bmz.v tests now (correctly) emits bmnz.v with swapped operands (see
  MSA.txt).
- bsel.v tests now (correctly) emits bmnz.v with swapped operands (see
  MSA.txt).

llvm-svn: 193693

llvm-svn: 193692

llvm-svn: 193691

Refactor the AVX512 intrinsics. Cluster the intrinsics into the appropriate vector extension class within the .td file.

llvm-svn: 193690

This problem was found and fixed by José Fonseca in March 2011 for
SmallPtrSet, committed r128566.  But as far as I can tell, all other
llvm hash tables retain the same problem:  the bucket count can grow
without bound while size() remains near constant by repeated
insert/erase cycles that tend to fill the container with tombstones. 
Here is a demo that has been reduced to a trivial case:

int
main()
{
   llvm::DenseSet<unsigned> d;
   for (unsigned i = 0; i < 0xFFFFFFF; ++i)
   {
       d.insert(i);
       d.erase(i);
   }
}

While the container size() never grows above 1, the bucket count grows
like this:

nb = 64
nb = 128
nb = 256
nb = 512
nb = 1024
nb = 2048
nb = 4096
nb = 8192
nb = 16384
nb = 32768
nb = 65536
nb = 131072
nb = 262144
nb = 524288
nb = 1048576
nb = 2097152
nb = 4194304
nb = 8388608
nb = 16777216
nb = 33554432
nb = 67108864
nb = 134217728
nb = 268435456

The above program currently consumes a few GB ram.  This patch brings
the memory consumption down by several orders of magnitude, and keeps
the bucket count at 64 for the above test.

llvm-svn: 193689

The PowerPC and ARM native builders spotted this.

llvm-svn: 193688

This required correcting the definition of the bins[lr]i intrinsics because
the result is also the first operand.

It also required removing the (arbitrary) check for 32-bit immediates in
MipsSEDAGToDAGISel::selectVSplat().

Currently using binsli.d with 2 bits set in the mask doesn't select binsli.d
because the constant is legalized into a ConstantPool. Similar things can
happen with binsri.d with more than 10 bits set in the mask. The resulting
code when this happens is correct but not optimal.

llvm-svn: 193687

llvm-svn: 193686

It's possible to embed the frontend in applications that haven't initialized
backend targets so we need to handle this condition gracefully.

llvm-svn: 193685

Before:
  if (a) {
    f();
  }
      // or else ..
      else {
    g();
  }

After:
  if (a) {
    f();
  }
  // or else ..
  else {
    g();
  }

llvm-svn: 193684

Before (clang-format wouldn't change):
  #include  "a.h"
  #include<a>

After:
  #include "a.h"
  #include <a>

This fixes llvm.org/PR16151.

llvm-svn: 193683

(or (and $a, $mask), (and $b, $inverse_mask)) => (vselect $mask, $a, $b).
where $mask is a constant splat. This allows bitwise operations to make use
of bsel.

It's also a stepping stone towards matching bins[lr], and bins[lr]i from
normal IR.

Two sets of similar tests have been added in this commit. The bsel_* functions
test the case where binsri cannot be used. The binsr_*_i functions will
start to use the binsri instruction in the next commit.

llvm-svn: 193682

No test since -debug output is intended for developers and not end-users.

llvm-svn: 193681

splat.d is implemented but this subtest is currently disabled. This is because
it is difficult to match the appropriate IR on MIPS32. There is a patch under
review that should help with this so I hope to enable the subtest soon.

llvm-svn: 193680

Make thunk this/return adjustment ABI-specific. Also, fix the return adjustment when using -cxx-abi microsoft

Reviewed at http://llvm-reviews.chandlerc.com/D2026

llvm-svn: 193679