highlight the most nested subexpression that appears most responsible (giving
the user better diagnostic feedback).

Updated test cases to illustrate this feature.

Implements: <rdar://problem/5880443>
llvm-svn: 50647

related to pp-expressions.  Doing so is pretty simple and this
patch implements it, yielding nice diagnostics like:

t.c:2:7: error: division by zero in preprocessor expression
#if 1 / (0 + 0)
    ~ ^ ~~~~~~~
t.c:5:14: error: expected ')' in preprocessor expression
#if (412 + 42
     ~~~~~~~~^
t.c:5:5: error: to match this '('
#if (412 + 42
    ^
t.c:10:10: warning: left side of operator converted from negative value to unsigned: -42 to 18446744073709551574
#if (-42 + 0U) / -2
     ~~~ ^ ~~
t.c:10:16: warning: right side of operator converted from negative value to unsigned: -2 to 18446744073709551614
#if (-42 + 0U) / -2
    ~~~~~~~~~~ ^ ~~
5 diagnostics generated.

llvm-svn: 50638

the final part of PR2279

llvm-svn: 50635

llvm-svn: 50632

llvm-svn: 50631

a) correct rejection of ',' in pp expressions.
b) the precedence of ',' was wrong w.r.t. ?:.

Thanks again to Neil for finding these and providing testcases.

llvm-svn: 50625

for pointing this out.

llvm-svn: 50624

llvm-svn: 50623

llvm-svn: 50617

Fix 'swapping' of attributes to not insert null values into the 
DeclAttrs map.

llvm-svn: 50612

type should be internal, not weak/linkonce.

llvm-svn: 50611

llvm-svn: 50597

llvm-svn: 50588

protocols into class's property list and performing semantics
on them for while doing so.

llvm-svn: 50587

llvm-svn: 50585

basic warnings (dead stores, null dereferences) on the first pass.

llvm-svn: 50584

Bug fix in StmtPrinter to handle pretty-printing ObjCMessageExprs involving variadic methods (also did some cosmetic cleanups in the printing output).

llvm-svn: 50583

llvm-svn: 50579

llvm-svn: 50557

llvm-svn: 50556

llvm-svn: 50553

llvm-svn: 50549

Replace Sema::CheckInitializerListTypes() with a helper class (InitListChecker) that synthesizes implicit InitListExpr's when appropriate (see InitListExpr comments in Expr.h for more details). I also moved the code to SemaInit.cpp, to help reduce clutter in SemaDecl.cpp.

NOTE: This work is incomplete and still fails many tests (as a result, it isn't enabled yet). Nevertheless, I wanted to check it in so I can work on it from home.
llvm-svn: 50544

llvm-svn: 50542

Correctly invalidate reference count state when passing objects by reference in message expressions we don't understand.

llvm-svn: 50541

Implicitly defined functions were getting the DeclContext of the function where they appeared, causing the bug: http://llvm.org/bugs/show_bug.cgi?id=2266.
Fix it by making implicitly defined functions get the DeclContext of translation unit.

llvm-svn: 50538

Added temporary fix for Obj-C exception handling in the static analyzer: treat these as panic functions.

llvm-svn: 50535

llvm-svn: 50533

llvm-svn: 50532

llvm-svn: 50530

Use pointer swizziling to unify in ObjCMessageExpr the receiver and classname "fields".  This saves us a pointer.
Implemented serialization for ObjCMessageExpr.

llvm-svn: 50528

should catch this one easily.

llvm-svn: 50526

lval passed as an argument.

Fix: Inverted diagnostic messages.
llvm-svn: 50513

llvm-svn: 50512

Extend InitListExpr API/IMPL to support arbitrary add/remove (in support of the initializer rewrite I am doing).

llvm-svn: 50511

llvm-svn: 50508

a CF memory leak occurred with GC enabled, etc.

llvm-svn: 50507

llvm-svn: 50503

llvm-svn: 50502

llvm-svn: 50500