Support -fsanitize-memory-track-origins.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171020 91177308-0d34-0410-b5e6-96231b3b80d8
Fix formatting over overloaded operators.

This fixes llvm.org/pr14686.

We used to add too many spaces for different versions of overloaded operator
function declarations/definitions. This patch changes, e.g.

  operator *() {}
  operator >() {}
  operator () () {}

to

  operator*() {}
  operator>() {}
  operator()() {}

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171028 91177308-0d34-0410-b5e6-96231b3b80d8
Align RHS after assignments and return statements.

This changes:
  int Result = a +  // force break
      b;
  return Result +  // force break
      5;

To:
  int Result = a +  // force break
               b;
  return Result +  // force break
         5;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171032 91177308-0d34-0410-b5e6-96231b3b80d8
Penalize tokens with a lower parenthesis level than the start of the line.

This prevents formattings like this (assuming "parameter" doesn't fit the line):
  bool f = someFunction() && someFunctionWithParam(
      parameter) && someOtherFunction();

Here, "parameter" - the start of line 2 - has a parenthesis level of 2, but
there are subsequent tokens ("&&" and "someOtherFunction") with a lower level.
This is bad for readability as "parameter" hides "someOtherFunction". With this
patch, this changes to:
  bool f = someFunction() &&
           someFunctionWithParam(parameter) &&
           someOtherFunction();

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171038 91177308-0d34-0410-b5e6-96231b3b80d8
Let clang-format format itself.

Apply all formatting changes that clang-format would apply to its own source
code. All choices seem to improve readability (or at least not make it worse).
No functional changes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171039 91177308-0d34-0410-b5e6-96231b3b80d8
Simplify RUN lines. No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171045 91177308-0d34-0410-b5e6-96231b3b80d8
Cache visibility of decls.

This unifies the linkage and visibility caching. I first implemented this when
working on pr13844, but the previous fixes removed the performance advantage of
this one.

This is still a step in the right direction for making linkage and visibility
cheap to use.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171048 91177308-0d34-0410-b5e6-96231b3b80d8
Revert r171048, "Cache visibility of decls."

It broke stage2.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171050 91177308-0d34-0410-b5e6-96231b3b80d8
Add 171048 back but invalidate the cache of all redeclarations when setting
the body of a functions. The problem was that hasBody looks at the entire chain
and causes problems to -fvisibility-inlines-hidden if the cache was not
invalidated.

Original message:

Cache visibility of decls.

This unifies the linkage and visibility caching. I first implemented this when
working on pr13844, but the previous fixes removed the performance advantage of
this one.
This is still a step in the right direction for making linkage and visibility
cheap to use.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171053 91177308-0d34-0410-b5e6-96231b3b80d8