Fixed bug in RemoveDeadBindings by implementing a simple "mark-and-sweep"
cleaner over the bindings, starting from the Decls and block-level expressions
that are considered "live" by the Liveness analysis.

Fixed bug in isa<> implementation for class LValue.

Added "VisitDeclRefExpr" to GRConstants so that we explicitly bind the current
value of variable to the Block-level Expression (i.e., when the DeclRefExpr is
at the CFGBlock level).

llvm-svn: 46839

Implement -fms-extensions. This allows us to fuzzy parse non-standard MS constructs used in "windows.h".

llvm-svn: 46838

as the initializers for DeclStmts were not being registered as being
live at the start of the DeclStmt.

llvm-svn: 46837

Fixed insidious bug in handling dereferences.

llvm-svn: 46835

in a smaller encoding on disk.

llvm-svn: 46832

code structure is more suitable for additional symbolic analysis.

llvm-svn: 46831

llvm-svn: 46830

explicitly document that return statement argument does not necessarily follow the result type of the function.  Add testcase.

llvm-svn: 46823

llvm-svn: 46819

llvm-svn: 46815

"if(x)". On the true branch we know the value is != 0, and on the false branch
we know it is 0.

llvm-svn: 46814

llvm-svn: 46812

llvm-svn: 46811

llvm-svn: 46809

llvm-svn: 46808

llvm-svn: 46807

llvm-svn: 46806

llvm-svn: 46805

llvm-svn: 46804

llvm-svn: 46803

previously in an opaque context.  If we didn't do this, 
computing its layout could be wasted: just be lazy.

llvm-svn: 46802

llvm-svn: 46801

static variables outside functions.

llvm-svn: 46800

llvm-svn: 46799

tag decl after it has been completed

llvm-svn: 46798

llvm-svn: 46797

Removed lval::SymIntConstraintVal; wrappers for symbolic constraints are not lvalues (only integers that evaluate to !0 or 0).

llvm-svn: 46796

symbols (for constant integers).

llvm-svn: 46795

ValueState no longer inherits FoldingSetNode (not needed).
Removed redundant operator= implementation for ValueState (it simply did the default behavior).

llvm-svn: 46794

using the bump-pointer allocator and a placed new; we accidentally allocated
a ValueStateImpl* instead, causing an overrun when we did a placed new().

llvm-svn: 46793

eliminating a bunch of forwarding methods and generally 
simplifying things.

llvm-svn: 46792

level code in clang.  This is a cleanup, but does implement "-o" for 
-emit-llvm.  One effect of this is that "clang foo.c -emit-llvm" will now
emit into foo.ll instead of stdout.  Use "clang foo.c -emit-llvm -o -" or 
"clang < foo.c -emit-llvm" to get the old behavior.

llvm-svn: 46791

This action will add constraints to the possible values of a symbol.
Still needs to be debugged.

llvm-svn: 46789

llvm-svn: 46788

Sema::ActOnTranslationUnitScope.  The various ObjC pieces at the top
of Sema.cpp should be moved into SemaObjC or something.

llvm-svn: 46787

llvm-svn: 46786

llvm-svn: 46785

llvm-svn: 46784

llvm-svn: 46783

Add a FIXME to clarify previous commit/experiment.

llvm-svn: 46782