[Sanitize] Don't emit function attribute sanitize_address/thread/memory if the function is blacklisted.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176550 91177308-0d34-0410-b5e6-96231b3b80d8
New ASTMatchers and enhancement to hasOverloadedOperatorName
    
Added two new narrowing matchers:
* hasMethod: aplies a matcher to a CXXRecordDecl's methods until a match is made
  or there are no more methods.
* hasCanonicalType: applies a matcher to a QualType's canonicalType.

Enhanced hasOverloadedOperatorName to work on CXXMethodDecl as well as
CXXOperatorCallExpr.

Updated tests and docs.

Reviewers: klimek, gribozavr


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176556 91177308-0d34-0410-b5e6-96231b3b80d8
Driver: add support for new style multiarch in Ubuntu 13.04

Patch by Sanne Wouda.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176557 91177308-0d34-0410-b5e6-96231b3b80d8
say objective-C in the warning and streamline
several diagnostics into one. // rdar://13094352


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176560 91177308-0d34-0410-b5e6-96231b3b80d8
Spell Objective-C correctly.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176563 91177308-0d34-0410-b5e6-96231b3b80d8
[PCH] Remove a couple of fields from serialization::reader::HeaderFileInfoTrait that are not used for anything.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176564 91177308-0d34-0410-b5e6-96231b3b80d8
[PCH] We don't need to instantiate HeaderFileInfoTrait in ASTReader more than once.

We can just re-use the one from HeaderFileInfoLookupTable.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176565 91177308-0d34-0410-b5e6-96231b3b80d8
[PCH] For HeaderFileInfoTrait, hash the key using size & time of the file.

Previously the hash would be the filename portion of the path, which could be
different for a filename with different case or a symbolic link with a different
name completely.
This did not actually create any issue so far because by validating all headers
in the PCH we created uniqued FileEntries based on inodes, so an #include of
a symbolic link (refering to a file from the PCH) would end up with a FileEntry
with filename same as the one recorded in the PCH.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176566 91177308-0d34-0410-b5e6-96231b3b80d8
[PCH] When pre-validating the headers from the PCH, only validate non-system headers.

Stat'ing all the headers from the PCH to make sure they are up-to-date takes significant time.
In a particular source file (whose PCH file included Cocoa.h) from total -fsyntax-only time
12% was just stat calls. Change pre-validation to only check non-system headers.

There are some notable disadvantages:

-If a system header, that is not include-guarded, changes after the PCH was created, we will not
find it in the header info table and we will #import it, effectively #importing it twice, thus
we will emit some error due to a multiple definition and after that the "header was modified" error will likely
be emitted, for example something like:

NSDictionary.h:12:1: error: duplicate interface definition for class 'NSDictionary'
@interface NSDictionary : NSObject <NSCopying, NSMutableCopying, NSSecureCoding, NSFastEnumeration>
^
NSDictionary.h:12:12: note: previous definition is here
@interface NSDictionary : NSObject <NSCopying, NSMutableCopying, NSSecureCoding, NSFastEnumeration>
           ^
fatal error: file 'NSDictionary.h' has been modified since the precompiled header was built

Though we get the "header was modified" error, this is a bit confusing.

-Theoretically it is possible that such a system header will cause no errors but it will just cause an
unfortunate semantic change, though I find this rather unlikely.

The advantages:

-Reduces compilation time when using a huge PCH like the Cocoa ones
-System headers change very infrequent and when they do, users/build systems should be able to know that
re-building from scratch is needed.

Addresses rdar://13056262

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176567 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] IDC: Add config option; perform the idc check on first “null node” rather than last “non-null”.

The second modification does not lead to any visible result, but, theoretically, is what we should
have been looking at to begin with since we are checking if the node was assumed to be null in
an inlined function.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176576 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Pass the correct Expr to the bug reporter visitors when dealing with CompoundLiteralExpr

This allows us to trigger the IDC visitor in the added test case.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176577 91177308-0d34-0410-b5e6-96231b3b80d8
Ensure that DIType is regenerated after we visit an implementation
that adds ivars to an interface.

Fixes rdar://13175234

This is an update to r176116 that performs a smart caching of interfaces.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176584 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Clean up a few doc comments for ProgramState and CallEvent.

No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176600 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Check for returning null references in ReturnUndefChecker.

Officially in the C++ standard, a null reference cannot exist. However,
it's still very easy to create one:

int &getNullRef() {
  int *p = 0;
  return *p;
}

We already check that binds to reference regions don't create null references.
This patch checks that we don't create null references by returning, either.

<rdar://problem/13364378>

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176601 91177308-0d34-0410-b5e6-96231b3b80d8
Fix typo.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176603 91177308-0d34-0410-b5e6-96231b3b80d8
Add a hasExternalStorageAsWritten helper. No functionality change.

It is possible that some of the current uses of
"getStorageClassAsWritten() == SC_Extern" should use this but I don't know
enough about SC_PrivateExtern to change and test them.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176606 91177308-0d34-0410-b5e6-96231b3b80d8
Add a hasExternalLinkage helper. No functionality change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176607 91177308-0d34-0410-b5e6-96231b3b80d8
Don't duplicate function names. Thanks to Jordan Rose for pointing it out.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176609 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Warn on passing a reference to null pointer as an argument in a call

Warn about null pointer dereference earlier when a reference to a null pointer is
passed in a call. The idea is that even though the standard might allow this, reporting
the issue earlier is better for diagnostics (the error is reported closer to the place where
the pointer was set to NULL). This also simplifies analyzer’s diagnostic logic, which has
to track “where the null came from”. As a consequence, some of our null pointer
warning suppression mechanisms started triggering more often.

TODO: Change the name of the file and class to reflect the new check.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176612 91177308-0d34-0410-b5e6-96231b3b80d8