[docs] The stat cache has been removed from the PCH, update the docs to remove mentions of it.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175109 91177308-0d34-0410-b5e6-96231b3b80d8
Document Clang's support for [[gnu::...]] attributes.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175110 91177308-0d34-0410-b5e6-96231b3b80d8
Some grammar fixes to 'Format String Checking', and reorder the text slightly to try to make the final code block actually get rendered.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175112 91177308-0d34-0410-b5e6-96231b3b80d8
Actually fix rendering of the example code block!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175113 91177308-0d34-0410-b5e6-96231b3b80d8
Teach ccc-analyze to pass on -iquote with no spaces between it an the argument.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175115 91177308-0d34-0410-b5e6-96231b3b80d8
When marking derived classes' virtual methods ODR-used in order to trigger
instantiation in order to permit devirtualization later in codegen, skip over
pure functions since those can't be devirtualization targets.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175116 91177308-0d34-0410-b5e6-96231b3b80d8