Use an APInt to handle pointers of arbitrary width, let
accumulateConstantOffset handle overflow issues.

llvm-svn: 273126

llvm-svn: 273125

llvm-svn: 273124

llvm-svn: 273123

Summary:
An implementation of std::experimental::propagate_const from Library Fundamentals Technical Specification v2.

No tests are provided for disallowed types like fancy pointers or function pointers as no code was written to handle these.

Reviewers: EricWF, mclow.lists

Differential Revision: http://reviews.llvm.org/D12486

llvm-svn: 273122

llvm-svn: 273121

llvm-svn: 273120

We currently only allow exact matches of shuffle mask patterns during target shuffle combining.

This patch relaxes this to permit SM_SentinelUndef in the combined shuffle to always be accepted as well as allowing exact matching of the SM_SentinelZero value.

I've adjusted some tests that were requiring exact shuffle masks to now include undef values.

Differential Revision: http://reviews.llvm.org/D21495

llvm-svn: 273119

llvm-svn: 273118

[X86] Add an assert to ensure that a routine is only used with 128-bit vectors. Reduce SmallVector size accordingly.

llvm-svn: 273117

[X86] Make is128BitLaneRepeatedShuffleMask correct the indices of the second vector for the smaller mask. This removes some custom correction code and can potentially provide other benefits in the future.

llvm-svn: 273116

[X86] Remove a dead path through one of the shuffle lowering routines. It's only called on single input shuffles masks already. Add an assert instead to verify.

llvm-svn: 273115

llvm-svn: 273114

[X86] Use SmallVector::assign instead of resize to ensure we really start with a vector of all -1s. Otherwise we're trusting the caller to pass the right thing.

This should be no functional change with current code.

llvm-svn: 273113

llvm-svn: 273112

llvm-svn: 273111

llvm-svn: 273110

llvm-svn: 273109

Passes to fix three hardware errata that appear on some LEON processor variants.

The instructions FSMULD, FMULS and FDIVS do not work as expected on some LEON processors. This change allows those instructions to be substituted for alternatives instruction sequences that are known to work.

These passes only run when selected individually, or as part of a processor defintion. They are not included in general SPARC processor compilations for non-LEON processors or for those LEON processors that do not have these hardware errata.

llvm-svn: 273108

* Fix non-null violation in strstream.cpp
  Overflow was calling memcpy with a null parameter and a size of 0.

* Fix std/atomics/atomics.flag/ tests:
  a.test_and_set() was reading from an uninitialized atomic, but wasn't
  using the value. The tests now clear the flag before performing the
  first test_and_set. This allows UBSAN to test that clear doesn't read
  an invalid value.

* Fix std/experimental/algorithms/alg.random.sample/sample.pass.cpp
  The tests were dereferencing a past-the-end pointer to an array so that
  they could do pointer arithmetic with it. Instead of dereference the iterator
  I changed the tests to use the special 'base()' test iterator method.

* Add -fno-sanitize=float-divide-by-zero to suppress division by zero UBSAN diagnostics.
  The tests that cause float division by zero are explicitly aware that they
  are doing that. Since this is well defined for IEEE floats suppress the warnings
  for now.

llvm-svn: 273107

Use strtof and strtod for floats and doubles respectively instead of
always using strtold. The other parts of the change are already implemented
in libc++.

This patch also has a drive by fix to wbuffer_convert::underflow() which
prevents it from calling memmove(buff, null, 0).

llvm-svn: 273106

Change the underlying offset and comparisons to use int64_t instead of
uint64_t.

Patch by River Riddle!

Differential Revision: http://reviews.llvm.org/D21499

llvm-svn: 273105

We all know <__tree> and <__hash_table> have plenty of UB that UBSan faithfully
finds. I am working on fixing this. However the noisy output from these failures
prevent automatically detecting regressions elsewhere.

This patch adds a blacklist file for these failures so I can later set up a
UBSAN buildbot.

llvm-svn: 273104

* Fix passing a negative number as either tv_usec or tv_nsec. When file_time_type
  is negative and has a non-zero sub-second value we subtract 1 from tv_sec
  and make the sub-second duration positive.

* Detect and report when 'file_time_type' cannot be represented by time_t. This
  happens when using large/small file_time_type values with a 32 bit time_t.

There is more work to be done in the implementation. It should start to use
stat's st_mtim or st_mtimeval if it's provided as an extension. That way
we can provide a better resolution.

llvm-svn: 273103

Will need to try this on an actual Windows system.

llvm-svn: 273102

Like linux-header-search.cpp and android-ndk-standalone.cpp.

llvm-svn: 273101

former is grammatically incorrect.

llvm-svn: 273100

later and we don't want to use it twice.

llvm-svn: 273099

llvm-svn: 273098

llvm-svn: 273097

llvm-svn: 273096

Summary:
This patch adds support for the _MM_ALIGN16 attribute on non-windows targets. This aligns Clang with ICC which supports the attribute on all targets.

Fixes PR28056

Reviewers: aaboud, echristo, cfe-commits, mkuper

Subscribers: zvi, mehdi_amini

Projects: #clang-c

Differential Revision: http://reviews.llvm.org/D21173

llvm-svn: 273095

llvm-svn: 273094

As pointed out by @majnemer this is a better way to detect utimensat on all
platforms. The Apple specific guard is unneeded.

llvm-svn: 273093

fstream has a switch over ios_base::seekdir which provides a defensive default
case. This seems like the right thing for fstream to do, but we need to disable
clangs warning during the build to allow this.

llvm-svn: 273092

Single threaded builds often don't provide a monotonic clock, so we can't
always provide a monotonic SleepFor(...) implementation. Hopefully this
won't cause the builds to hang.

llvm-svn: 273091

llvm-svn: 273090

llvm-svn: 273089

llvm-svn: 273088

llvm-svn: 273087