[ARM] Fix AAPCS regression caused by r211898

r211898 introduced a regression where a large struct, which would
normally be passed ByVal, was causing padding to be inserted to
prevent the backend from using some GPRs, in order to follow the
AAPCS. However, the type of the argument was not being set correctly,
so the backend cannot align 8-byte aligned struct types on the stack.

The fix is to not insert the padding arguments when the argument is
being passed ByVal.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213359 91177308-0d34-0410-b5e6-96231b3b80d8
[OPENMP] Initial parsing and sema analysis for 'barrier' directive.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213360 91177308-0d34-0410-b5e6-96231b3b80d8
[OPENMP] Initial parsing and sema analysis for 'taskwait' directive.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213363 91177308-0d34-0410-b5e6-96231b3b80d8
ARM: Add test for ACLE memory barrier intrinsics

Add an additional test to ensure that someone doesn't accidentally
change the definitions such that they can take a non-constant value.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213364 91177308-0d34-0410-b5e6-96231b3b80d8
Moved 25 flags to clang_ignored_gcc_optimization_f_Group. Will display a warning
to the user if they try to pass those optimizations. The revision for this patch
is here: http://reviews.llvm.org/D4474. This patch will fix many errors in the
rebuild of Debian with clang. Here is a link to the page for unknown arguments:
http://clang.debian.net/status.php?version=3.4.2&key=UNKNOWN_ARG


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213365 91177308-0d34-0410-b5e6-96231b3b80d8
Emit lifetime.start / lifetime.end markers for unnamed temporary objects.

This will give more information to the optimizers so that they can reuse stack slots.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213379 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "Emit lifetime.start / lifetime.end markers for unnamed temporary objects."

This reverts commit dbf785a6432f78a8ec229665876647c4cc610d3d, while I qm
investigating a buildbot failure.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213380 91177308-0d34-0410-b5e6-96231b3b80d8
[mips] Use Triple::getVendor() instead of Triple::getVendorName() to identify 'mti' vendor triples.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213383 91177308-0d34-0410-b5e6-96231b3b80d8
Mark C++ reference parameters as dereferenceable

Because references must be initialized using some evaluated expression, they
must point to something, and a callee can assume the reference parameter is
dereferenceable. Taking advantage of a new attribute just added to LLVM, mark
them as such.

Because dereferenceability in addrspace(0) implies nonnull in the backend, we
don't need both attributes. However, we need to know the size of the object to
use the dereferenceable attribute, so for incomplete types we still emit only
nonnull.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213386 91177308-0d34-0410-b5e6-96231b3b80d8
For i386, gcc 4.9 under Debian (at least) updated its paths to i586-linux-gnu
(i486-linux-gnu previously). Adding this triple to the list of search.
Also impacts clang 3.4.2

Reported on the Debian bug tracking system here:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=754963
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=755183




git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213388 91177308-0d34-0410-b5e6-96231b3b80d8
Make sure globals created by UBSan are not instrumented by ASan.

Summary:
This change adds description of globals created by UBSan
instrumentation (UBSan handlers, type descriptors, filenames) to
llvm.asan.globals metadata, effectively "blacklisting" them. This can
dramatically decrease the data section in binaries built with UBSan+ASan,
as UBSan tends to create a lot of handlers, and ASan instrumentation
increases the global size to at least 64 bytes.

Test Plan: clang regression test suite

Reviewers: rsmith

Reviewed By: rsmith

Subscribers: cfe-commits, byoungyoung, kcc

Differential Revision: http://reviews.llvm.org/D4575

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213392 91177308-0d34-0410-b5e6-96231b3b80d8
[UBsan] Skip -fsanitize=vptr instrumentations when the pointer value is null.

Otherwise -fsanitize=vptr causes the program to crash when it downcasts
a null pointer.

Reviewed in http://reviews.llvm.org/D4412.
Patch by Byoungyoung Lee!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213393 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "[modules] Fix macro hiding bug exposed if:"

This is breaking the system modules on Darwin, because something that
was defined and re-exported no longer is.  Might be this patch, or might
just be a really poor interaction with an existing visibility bug.

This reverts commit r213348.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213395 91177308-0d34-0410-b5e6-96231b3b80d8
Recommit: Handle diagnostic warnings in Frontend diagnostic handler.

Clang uses a diagnostic handler to grab diagnostic messages so it can print them
with the line of source code they refer to. This patch extends this to handle
optimization failures that were added to llvm to produce a warning when
loop vectorization is explicitly specified (using a pragma clang loop directive)
but fails.

Update renames warning flag name to avoid indicating the flag's severity and
adds a test.

Reviewed by Alp Toker



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213400 91177308-0d34-0410-b5e6-96231b3b80d8
CodeGen: Properly null-check typeid expressions

Summary:
Thoroughly check for a pointer dereference which yields a glvalue.  Look
through casts, comma operators, conditional operators, paren
expressions, etc.

Reviewers: rsmith

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D4416

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213401 91177308-0d34-0410-b5e6-96231b3b80d8
Address Richard's comments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213402 91177308-0d34-0410-b5e6-96231b3b80d8
Address Richard's comments

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213403 91177308-0d34-0410-b5e6-96231b3b80d8
Address Richard's latest feedback.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213404 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "CodeGen: Properly null-check typeid expressions"

This reverts commit r213401, r213402, r213403, and r213404.

I accidently committed these changes instead of updating the
differential.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213405 91177308-0d34-0410-b5e6-96231b3b80d8
Merge two lines

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213415 91177308-0d34-0410-b5e6-96231b3b80d8