encode the *exact* semantics which the header search paths internally
built by the Frontend layer have had, which is both non-user-provided,
and at times adding the implicit extern "C" bit to the directory entry.

There are lots of CC1 options that are very close, but none do quite
this, and they are all already overloaded for other purposes. In some
senses this makes the command lines more clean as it clearly indicates
which flags are exclusively used to implement internal detection of
"standard" header search paths.

Lots of the implementation of this is really crufty, due to the
surrounding cruft. It doesn't seem worth investing lots of time cleaning
this up as it isn't new, and hopefully *lots* of this code will melt
away as header search inside of the frontend becomes increasingly
trivial.

llvm-svn: 143798

Tweak LookThroughStmt() in LiveVariables to properly look through alternativing ParenExprs and OpaqueValueExprs.  Thanks to Anna and Argiris for iterating on this function.  My original patch embarssingly didn't even pass the Clang tests.

llvm-svn: 143797

llvm-svn: 143796

llvm-svn: 143795

llvm-svn: 143794

 - Generates the llvm-config-2 LibraryDependencies.inc file.
 - Generates dependency information so that cmake will automatically reconfigure
   when LLVMBuild.txt files are changed.

llvm-svn: 143793

llvm-svn: 143792

to go through the driver.

llvm-svn: 143791

Make test/Analysis/misc-ps.c test pass.

llvm-svn: 143790

Until we find out a way to easily find out what changed by looking at the logs.

llvm-svn: 143789

llvm-svn: 143788

llvm-svn: 143787

llvm-svn: 143786

other aspects of the gold plugin docs to reflect reality.

llvm-svn: 143785

materialise them in LTO.

I observed a ~0.5-1% speedup for an LTO link of opt.

llvm-svn: 143784

(Ninja generator requirement.)

llvm-svn: 143783

llvm-svn: 143782

llvm-svn: 143781

switch statement, not the while loop).

llvm-svn: 143780

llvm-svn: 143779

llvm-svn: 143778

llvm-svn: 143777

llvm-svn: 143776

llvm-svn: 143775

llvm-svn: 143774

llvm-svn: 143773

Joel Dillon that fixed 64 debugging for Linux.

I also added a patch to fix up the ProcessLinux::DoLaunch() to be up to date.
I wasn't able to verify it compiles, but it should b really close.

llvm-svn: 143772

llvm-svn: 143771

llvm-svn: 143770

llvm-svn: 143769

llvm-svn: 143768

llvm-svn: 143767

llvm-svn: 143766

llvm-svn: 143765

llvm-svn: 143764

Serialized diagnostics: pull category name serialization into diagnostic blocks.  The goal is to remove BLOCK_STRINGS so that the bitcode file can potentially be streamed.

llvm-svn: 143763

llvm-svn: 143762

llvm-svn: 143761

Serialized diagnostics: encode a 24 bit version number as part of the "magic number" of serialized diagnostics.

llvm-svn: 143760

llvm-svn: 143759