Implement hasParent()-matcher.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166421 91177308-0d34-0410-b5e6-96231b3b80d8
driver/Darwin: Default to AAPCS for M-class CPUs.

 - This is an assumption that is currently hardwired into the backend, we need
   to do this in order for the frontend and backend to agree.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166428 91177308-0d34-0410-b5e6-96231b3b80d8
Eliminate the redundancy between source-file information in the source
manager block and input-file information in the control block. The
source manager entries now point back into the control block. Input
files are now lazily deserialized (if validation is disabled). Reduces
Cocoa's PCH by the ~70k I added when I introduced the redundancy in
r166251.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166429 91177308-0d34-0410-b5e6-96231b3b80d8
driver/Darwin: Follow up to last patch, M-class CPUs are AAPCS but not EABI.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166430 91177308-0d34-0410-b5e6-96231b3b80d8
Fix pre-commit refacto failure.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166431 91177308-0d34-0410-b5e6-96231b3b80d8
[ms-inline asm] Test case for r166433.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166434 91177308-0d34-0410-b5e6-96231b3b80d8
Fix for PR13334.  This prevents crashes that result from badly formed
expressions involving __has_include


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166438 91177308-0d34-0410-b5e6-96231b3b80d8
Testcase change for r166440.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166441 91177308-0d34-0410-b5e6-96231b3b80d8
ASTReader.cpp: Fix a warning. [-Wunused-variable]

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166442 91177308-0d34-0410-b5e6-96231b3b80d8
[Options] Add prefixes to options.

Each option has a set of prefixes. When matching an argument such as
-funroll-loops. First the leading - is removed as it is a prefix. Then
a lower_bound search for "funroll-loops" is done against the option table by
option name. From there each option prefix + option name combination is tested
against the argument.

This allows us to support Microsoft style options where both / and - are valid
prefixes. It also simplifies the cases we already have where options come in
both - and -- forms. Almost every option for gnu-ld happens to have this form.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166444 91177308-0d34-0410-b5e6-96231b3b80d8
Distinguish the various kinds of AST file loading failures:
file corruption, compiler version mismatch, target/language
configuration mismatch, out-of-date AST file. No functionality change
yet.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166446 91177308-0d34-0410-b5e6-96231b3b80d8
Collapse ASTReader::ReadSLocEntryRecord() into its only caller,
ReadSLocEntry(). No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166447 91177308-0d34-0410-b5e6-96231b3b80d8
Allow clients of the AST reader to specify what kinds of AST load
failures they know how to tolerate, e.g., out-of-date input files or
configuration/version mismatches. Suppress the corresponding
diagnostics if the client can handle it.

No clients actually use this functionality, yet.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166449 91177308-0d34-0410-b5e6-96231b3b80d8
Handle implicitly-included PCH files the same way as
implicitly-included PTH files during initialization, delaying the
mapping down to the "original source file" until after later in the
initialization process.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166452 91177308-0d34-0410-b5e6-96231b3b80d8
Ugly ugly hack for libstdc++-4.6 and libstdc++-4.7 compatibility. These
libraries have an incorrect definition of std::common_type (inherited from a
bug in the standard -- see LWG issue 2141), whereby they produce reference
types when they should not.

If we instantiate a typedef named std::common_type<...>::type, which is defined
in a system header as decltype(... ? ... : ...), and the decltype produces a
reference type, convert it to the non-reference type. (This doesn't affect any
LWG2141-conforming implementation of common_type, such as libc++'s, because the
default implementation of common_type<...>::type isn't supposed to produce a
reference type.)

This is horrible. I'm really sorry. :( Better ideas appreciated!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166455 91177308-0d34-0410-b5e6-96231b3b80d8
[Options] Fix two options I mistransformed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166458 91177308-0d34-0410-b5e6-96231b3b80d8
Don't try to use inreg with 0 sized structs. Thanks to Eli for reporting the
regression.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166461 91177308-0d34-0410-b5e6-96231b3b80d8
[ms-inline-asm] Add handling for errors coming out of the backend.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166463 91177308-0d34-0410-b5e6-96231b3b80d8
[libclang] Add an environment variable to disable thread background priotity, for testing

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166466 91177308-0d34-0410-b5e6-96231b3b80d8
Fix -Wunused-value to not warn on expressions that have unresolved lookups due
to dependent arguments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166468 91177308-0d34-0410-b5e6-96231b3b80d8