Summary:
This patch adds a new CMake module for working with ExternalProjects. This wrapper for ExternalProject supports using just-built tools and can hook up dependencies properly so that projects get cleared out.

The example usage here is for the llvm test-suite. In this example, the test-suite is setup as dependent on clang and lld if they are in-tree. If the clang or lld binaries change the test-suite is re-configured, cleaned, and rebuilt.

This cleanup and abstraction wrapping ExternalProject can be extended and applied to other runtime libraries like compiler-rt and libcxx.

Reviewers: samsonov, jroelofs, rengolin, jmolloy

Subscribers: jmolloy, llvm-commits

Differential Revision: http://reviews.llvm.org/D14513

llvm-svn: 252747

llvm-svn: 252746

llvm-svn: 252745

This reverts commits r252683 and r252689. This tool should not live here. See
http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/311862.html
for discussion.

llvm-svn: 252744

Differential Revision: http://reviews.llvm.org/D13316
Fixes PR25003

llvm-svn: 252743

llvm-svn: 252742

Differential Revision: http://reviews.llvm.org/D14575

llvm-svn: 252741

If we have a chain of BFIs, we may be able to combine several together into one merged BFI. We can do this if the "from" bits from one BFI OR'd with the "from" bits from the other BFI form a contiguous range, and the same with the "to" bits.

llvm-svn: 252740

If linking a 32 bit binary, these values must fit in 32 bits.

llvm-svn: 252739

Summary: This is enough to get the asan static_tls.cc test case working.

Reviewers: eugenis, samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D14574

llvm-svn: 252738

This just reduces the noise from an upcoming patch.

llvm-svn: 252737

llvm-svn: 252736

llvm-svn: 252735

Measurements primarily on AArch64 have shown this feature does not
significantly effect compile-time. The are no significant perf changes in LNT,
but for AArch64 at least, there are wins in third party benchmarks.

As discussed on llvm-dev, we're going to try turning this on by default and see
how other targets react to the change.

llvm-svn: 252733

llvm-svn: 252732

This patch enables building and running TSan unit tests on OS X.

Differential Revision: http://reviews.llvm.org/D14546

llvm-svn: 252731

Summary:
On PowerPC64 Linux PTRACE_GETREGS is a #define and PT_GETREGS is not.
On other systems it's the other way round. Extend the #ifs to check for
both PTRACE_* and PT_*.

This fixes test/sanitizer_common/TestCases/Linux/ptrace.cc when msan is
enabled for PowerPC64.

Reviewers: zatrazz, kcc, eugenis, samsonov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D14564

llvm-svn: 252730

    
Differential Revision: http://reviews.llvm.org/D14241

llvm-svn: 252729

llvm-svn: 252728

llvm-svn: 252727

Basic blocks that are always executed can not be error blocks as their execution
can not possibly be an unlikely event. In this commit we tighten the check
if an error block to basic blcoks that do not dominate the exit condition, but
that dominate all exiting blocks of the scop.

llvm-svn: 252726

r252713 introduced a couple of regressions due to later basic blocks refering
to instructions defined in error blocks which have not yet been modeled.

This commit is currently just encoding limitations of our modeling and code
generation backends to ensure correctness. In theory, we should be able to
generate and optimize such regions, as everything that is dominated by an error
region is assumed to not be executed anyhow. We currently just lack the code
to make this happen in practice.

llvm-svn: 252725

llvm-svn: 252724

Differential Revision: http://reviews.llvm.org/D12318

llvm-svn: 252723

If possible and profitable, replace lea %reg, 1(%reg) and lea %reg, -1(%reg) with inc %reg and dec %reg respectively.

Patch by: anton.nadolsky@intel.com
Differential Revision: http://reviews.llvm.org/D14059

llvm-svn: 252722

    
Differential Revision: http://reviews.llvm.org/D14243

llvm-svn: 252721

Summary:
For clarity and ease of maintenance, I suggest porting this test
to use the same tooling as the rest of the tests.

Reviewers: joerg, rengolin, dougk, yaron.keren

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D14548

llvm-svn: 252720

Differential Revision: http://reviews.llvm.org/D14242

llvm-svn: 252719

llvm-svn: 252718

This is in preparation for adding .eh_frame support. They will have
another input section type but will also need to be relocated.

llvm-svn: 252717

llvm-svn: 252716

Atomic RMW is not necessary in InitializeGuardArray.
It is supposed to run when no user code runs.
And if user code runs concurrently, then the atomic
RMW won't help anyway. So replace it with non-atomic RMW.

InitializeGuardArray takes more than 50% of time during re2 fuzzing:

real	0m47.215s
51.56% a.out a.out [.] __sanitizer_reset_coverage

6.68%  a.out  a.out                [.] __sanitizer_cov
3.41%  a.out  a.out                [.] __sanitizer::internal_bzero_aligned16(void*, unsigned long)
1.79%  a.out  a.out                [.] __asan::Allocator::Allocate(unsigned long, unsigned long,
With this change:

real 0m31.661s
26.21% a.out a.out [.] sanitizer_reset_coverage
10.12% a.out a.out [.] sanitizer_cov

5.38%  a.out  a.out                [.] __sanitizer::internal_bzero_aligned16(void*, unsigned long)
2.53%  a.out  a.out                [.] __asan::Allocator::Allocate(unsigned long, unsigned long,
That's 33% speedup.

Reviewed in http://reviews.llvm.org/D14537

llvm-svn: 252715

Thinking more about the last commit I came to realize that for testing the
new functionality it is sufficient to verify that the iteration domains
we construct for a simple test case do not contain any of the complexity that
caused compile time issues for larger inputs.

llvm-svn: 252714

Previously, we just skipped error blocks during scop construction. With
this change we make sure we can construct domains for error blocks such that
these domains can be forwarded to subsequent basic blocks.

This change ensures that basic blocks that post-dominate and are dominated by
a basic block that branches to an error condition have the very same iteration
domain as the branching basic block. Before, this change we would construct
a domain that excludes all error conditions. Such domains could become _very_
complex and were undesirable to build.

Another solution would have been to drop these constraints using a
dominance/post-dominance check instead of modeling the error blocks. Such
a solution could also work in case of unreachable statements or infinite
loops in the scop. However, as we currently (to my believe incorrectly) model
unreachable basic blocks in the post-dominance tree, such a solution is not
yet feasible and requires first a change to LLVM's post-dominance tree
construction.

This commit addresses the most sever compile time issue reported in:
http://llvm.org/PR25458

llvm-svn: 252713

[X86] Add 'pause' builtin that's already in llvm and use it instead of inline assembly to implement _mm_pause.

llvm-svn: 252712

[X86] Use __builtin_ia32_paddq and __builtin_ia32_psubq to implement a couple intrinsics that were supposed to operate on MMX registers. Otherwise we end up operating on GPRs. Throw in a test for _mm_mul_su32 while I was there.

llvm-svn: 252711

llvm-svn: 252710

[X86] Fix feature flags on some MMX register instructions that really were introduced with SSE or SSE2.

llvm-svn: 252709

llvm-svn: 252708

Tracked by:
https://llvm.org/bugs/show_bug.cgi?id=25486

llvm-svn: 252707