Fix <rdar://problem/5924576> clang -fsyntax-only generates "redefinition" errors when parsing AppKit that gcc does not.

Teach Sema::MergeVarDecl() about __private_extern__.

llvm-svn: 51005

changes that don't change functionality.

llvm-svn: 51004

llvm-svn: 51003

Fix <rdar://problem/5928590> clang -fsyntax-only: "incompatible operand types ('int' and 'void')" on input that 'gcc -fsyntax-only' eats

llvm-svn: 51002

"is{Trivially,Really}ReMaterializable" methods.

llvm-svn: 51001

llvm-svn: 51000

semantically identical, but little difference in
either results or execution speed; but it's much
easier to read, at least IMO.

llvm-svn: 50999

llvm-svn: 50998

encoding information.

llvm-svn: 50997

llvm-svn: 50996

llvm-svn: 50995

llvm-svn: 50994

llvm-svn: 50993

Hard code CmpInst back to i1 for now while I go track down what in the bitcode reader/writer is assuming i1
This was breaking a bunch of tests

llvm-svn: 50992

llvm-svn: 50991

llvm-svn: 50990

This is necessary to unbreak the build.

llvm-svn: 50988

possible for it to produce worse code than before.

The rest of this patch is code cleanup.

llvm-svn: 50987

llvm-svn: 50986

for details.  CodeGen support coming in a follow up patch

llvm-svn: 50985

llvm-svn: 50983

llvm-svn: 50980

llvm-svn: 50979

Remove redundant assignment.

llvm-svn: 50978

llvm-svn: 50977

ScopedDecl with the backpatcher, and *not* a local variable on the stack. The
value of DeclCtx gets filled in *later* by the backpatcher.

This fixes: http://llvm.org/bugs/show_bug.cgi?id=2308

llvm-svn: 50976

llvm-svn: 50975

llvm-svn: 50974

Makes it possible to use options with names like "Wa,".
Also fixes the -Wall option handling as a side-effect.

llvm-svn: 50973

llvm-svn: 50972

llvm-svn: 50971

llvm-svn: 50970

in a non-void function that calls abort.

llvm-svn: 50969

llvm-svn: 50968

llvm-svn: 50967

llvm-svn: 50966

llvm-svn: 50965

Move the various analyses used by GVN into static variables so we don't have to keep passing them around or refetching them.

llvm-svn: 50963

llvm-svn: 50962

SCCP like sparse lattice analysis with relative ease.  Just pick your
lattice function and implement the transfer function and you're good.
Just make sure you don't break monotonicity ;-)

llvm-svn: 50961