This is made possible by removing an assert in llc that assumed
MIRParser::parseLLVMModule would exit on error. MIRParser's documentation states
that it returns null if a parsing error occurs, so there's no reason to assert.
We can instead just fall through to where the check for a module is performed
and exit if it is null.

This commit is part of the clean-up after r269655.

Fixes PR27770

Differential Revision: http://reviews.llvm.org/D20371

llvm-svn: 272254

llvm-svn: 272253

[AVX512] Fix shuffle decode printing for several instructions with write masks. There are still more bugs here with UNPCK and PALIGN for sure. But these were the easiest ones to fix.

llvm-svn: 272252

If an immediate is only used in an AND node, it is possible that the immediate can be more optimally materialized when negated. If this is the case, we can negate the immediate and use a BIC instead;

  int i(int a) {
    return a & 0xfffffeec;
  }

Used to produce:
    ldr r1, [CONSTPOOL]
    ands r0, r1
  CONSTPOOL: 0xfffffeec

And now produces:
    movs    r1, #255
    adds    r1, #20  ; Less costly immediate generation
    bics    r0, r1

llvm-svn: 272251

llvm-svn: 272250

[X86] Bring consistent naming to the SSE/AVX and AVX512 PALIGNR instructions. Then add shuffle decode printing for the EVEX forms which is made easier by having the naming structure more similar to other instructions.

llvm-svn: 272249

llvm-svn: 272248

It is possible for a field and a class to have the same name.  In such
cases, performing lookup for the field might return a result set with
more than one entry.  An overzealous assertion fired, causing us to
crash instead of using the non-class lookup result.

This fixes PR28060.

llvm-svn: 272247

[X86] Handle AVX2 pslldqi and psrldqi intrinsics shufflevector creation directly in the header file instead of in CGBuiltin.cpp. Simplify the sse2 equivalents as well.

llvm-svn: 272246

llvm-svn: 272245

[X86] Add void to the argument list of intrinsics that don't take arguments since empty argument list mean something else in C.

llvm-svn: 272244

llvm-svn: 272243

llvm-svn: 272242

Add support to the AArch64 IAS for the `.arch` directive.  This allows the
assembly input to use architectural functionality in part of a file.  This is
used in existing code like BoringSSL.

Resolves PR26016!

llvm-svn: 272241

llvm-svn: 272240

Summary: Enable existing summary-based importing support in the gold-plugin.

Reviewers: mehdi_amini

Subscribers: llvm-commits, mehdi_amini

Differential Revision: http://reviews.llvm.org/D21080

llvm-svn: 272239

llvm-svn: 272238

We can safely rely on a NoWrap add recurrence causing UB down the road
only if we know the loop does not have a exit expressed in a way that is
opaque to ScalarEvolution (e.g. by a function call that conditionally
calls exit(0)).

I believe with this change PR28012 is fixed.

Note: I had to change some llvm-lit tests in LoopReroll, since it looks
like they were depending on this incorrect behavior.

llvm-svn: 272237

llvm-svn: 272236

llvm-svn: 272235

llvm-svn: 272234

llvm-svn: 272233

looking for it along $PATH. This allows installs of LLVM tools outside of
$PATH to find the symbolizer and produce pretty backtraces if they crash.

llvm-svn: 272232

They have probably been discarded during optimization.

llvm-svn: 272231

llvm-svn: 272230

TPI hash table contains a parallel array for the type records.
For each type record R, a hash value is calculated by `H(R) % NumBuckets`
where H is a hash function, and the result is stored to a bucket element.
H is TPI1::hashPrec function in microsoft-pdb repository.

Our hash function does not support all type record types yet.
Currently it supports only records for line number.
I'll extend it in a follow up patch.

The aim of verify the hash table is not only detect corrupted files.
It ensures that our understanding of how the hash values are calculated
is correct.

llvm-svn: 272229

Summary:
Break on all switch cases for outer and inner switches.
No functionality changed.

Reviewers: llvm-commits, sanjoy

Differential Revision: http://reviews.llvm.org/D21158

llvm-svn: 272228

Differential Revision: http://reviews.llvm.org/D21056

llvm-svn: 272227

Without that check it was possible to write test cases where the size
was not specified and we ended up with weird asserts down the road,
because the default value (1) would not make sense.

llvm-svn: 272226

llvm-svn: 272225

Summary:
This fixes PR26682. Also add LCSSA as a preserved pass to LoopSimplify,
that looks correct to me and allows to write a test for the issue.

Reviewers: chandlerc, bogner, sanjoy

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D21112

llvm-svn: 272224

We are going to use the hash functions from TPI streams.

Differential Revision: http://reviews.llvm.org/D21142

llvm-svn: 272223

llvm-svn: 272221

We are always greater than CMake 2.8.11, so we don't need this check.

llvm-svn: 272220

Since we're always greater than 2.8.12, we don't need this check anymore.

llvm-svn: 272219

This just removes some redundant checks and updates warning text.

llvm-svn: 272218

cmake 3.4 introduced LIST_DIRECTORIES to glob recurse, which can be
used to simplify this code greatly.

llvm-svn: 272217

llvm-svn: 272216

llvm-svn: 272215

llvm-svn: 272214