llvm-svn: 166957

The problem is as follows: C++11 has contexts which are not
potentially-evaluated, and yet in which we are required or encouraged to
perform constant evaluation. In such contexts, we are not permitted to
implicitly define special member functions for literal types, therefore
we cannot evalaute those constant expressions.

Punt on this in one more context for now by skipping checking constexpr
variable initializers if they occur in dependent contexts.

llvm-svn: 166956

llvm-svn: 166954

llvm-svn: 166953

llvm-svn: 166952

treating it as if it were an IEEE floating-point type with 106-bit
mantissa.

This makes compile-time arithmetic on "long double" for PowerPC
in clang (in particular parsing of floating point constants)
work, and fixes all "long double" related failures in the test
suite.

llvm-svn: 166951

llvm-svn: 166950

equivalent to [expr1 + expr2].  See test cases for more examples.
rdar://12470392

llvm-svn: 166949

llvm-svn: 166948

- Add missing pattern on X86ISD::VZEXT from VR256 to VR256 when AVX2 is enabled.

llvm-svn: 166947

llvm-svn: 166946

llvm-svn: 166945

Partial copies can show up even when CoalescerPair.isPartial() returns
false. For example:

   %vreg24:dsub_0<def> = COPY %vreg31:dsub_0; QPR:%vreg24,%vreg31

Such a partial-partial copy is not good enough for the transformation
adjustCopiesBackFrom() needs to do.

llvm-svn: 166944

This fixes PR12757.

llvm-svn: 166943

Previously, the warning would erroneously fire on this:

for (Test *a in someArray)
  use(a.weakProp);

...because it looks like the same property is being accessed over and over.
However, clearly this is not the case. We now ignore loops like this for
local variables, but continue to warn if the base object is a parameter,
global variable, or instance variable, on the assumption that these are
not repeatedly usually assigned to within loops.

Additionally, do-while loops where the condition is 'false' are not really
loops at all; usually they're just used for semicolon-swallowing macros or
using "break" like "goto".

<rdar://problem/12578785&12578849>

llvm-svn: 166942

Our one basic suppression heuristic is to assume that functions do not
usually return NULL. However, when one of the arguments is NULL it is
suddenly much more likely that NULL is a valid return value. In this case,
we don't suppress the report here, but we do attach /another/ visitor to
go find out if this NULL argument also comes from an inlined function's
error path.

This new behavior, controlled by the 'avoid-suppressing-null-argument-paths'
analyzer-config option, is turned off by default. Turning it on produced
two false positives and no new true positives when running over LLVM/Clang.

This is one of the possible refinements to our suppression heuristics.
<rdar://problem/12350829>

llvm-svn: 166941

Additionally, don't collect PostStore nodes -- they are often used in
path diagnostics.

Previously, we tried to track null arguments in the same way as any other
null values, but in many cases the necessary nodes had already been
collected (a memory optimization in ExplodedGraph). Now, we fall back to
using the value of the argument at the time of the call, which may not
always match the actual contents of the region, but often will.

This is a precursor to improving our suppression heuristic.
<rdar://problem/12350829>

llvm-svn: 166940

wrapper returns a vector of integers when passed a vector of pointers) by having
getIntPtrType itself return a vector of integers in this case.  Outside of this
wrapper, I didn't find anywhere in the codebase that was relying on the old
behaviour for vectors of pointers, so give this a whirl through the buildbots.

llvm-svn: 166939

We may need to change the way profile counter values are stored, but
saturation is the wrong thing to do.  Just remove it for now.

Patch by Alastair Murray!

llvm-svn: 166938

Change the PassManagerBuilder (used by -O3) loop vectorizer flag from -vectorize to -vectorize-loops because we dont want to share the same flag as the bb-vectorizer.

llvm-svn: 166937

llvm-svn: 166936

llvm-svn: 166935

llvm-svn: 166934

llvm-svn: 166932

llvm-svn: 166931

incorrect instruction sequence due to it not being aware that an
inline assembly instruction may reference memory.

This patch fixes the problem by causing the scheduler to always assume that any
inline assembly code instruction could access memory. This is necessary because
the internal representation of the inline instruction does not include
any information about memory accesses.
 
This should fix PR13504.

llvm-svn: 166929

ELF subtarget.

The existing logic is used as a fallback to avoid any changes to the Darwin
ABI.  PPC64 ELF now has two possible data layout strings: one for FreeBSD,
which requires 8-byte alignment, and a default string that requires
16-byte alignment.

I've added a test for PPC64 Linux to verify the 16-byte alignment.  If
somebody wants to add a separate test for FreeBSD, that would be great.

Note that there is a companion patch to update the alignment information
in Clang, which I am committing now as well.

llvm-svn: 166928

ELF subtarget.

The existing description string is moved from PPC64TargetInfo to its
DarwinTargetInfo subclass, to avoid any changes to the Darwin ABI.
PPC64TargetInfo now has two possible description strings: one for FreeBSD,
which requires 8-byte alignment, and a default string that requires
16-byte alignment.

I've added a test for PPC64 Linux to verify the 16-byte alignment.  If
somebody wants to add a separate test for FreeBSD, that would be great.

Note that there is a companion patch to update the alignment information
in LLVM, which I am committing now as well.

llvm-svn: 166927

just call getPointerTypeSizeInBits.  No functionality change.

llvm-svn: 166926

preferred alignment.  Correct the documentation.

llvm-svn: 166925

llvm-svn: 166924

llvm-svn: 166923

llvm-svn: 166922

llvm-svn: 166921

Patch by Amara Emerson.

llvm-svn: 166920

Patch by Amara Emerson.

llvm-svn: 166919

Currently only implemented for ELF.

Patch by Amara Emerson.

llvm-svn: 166918

Types, QualTypes and TypeLocs.

Review: http://llvm-reviews.chandlerc.com/D83
llvm-svn: 166917

llvm-svn: 166916

llvm-svn: 166915