- EmitStmt is no longer required to finish with a current insertion
   point defined (i.e. it does not need to make dummy
   blocks). Instead, it can clear the insertion point in the builder
   which indicates that the current insertion point is unreachable.
 - CodeGenFunction provides HaveInsertPoint and EnsureInsertPoint
   which respectively test if there is an insert point and ensure an
   insertion point exists (by making a dummy block).
 - Clearly mark functions in CodeGenFunction which can be called with
   no insertion point defined. Currently this is a limited set, and
   EmitStmt simply EnsureInsertPoint()s before emitting subsequent IR.

Remove EmitDummyBlock, which is no longer needed. Clients who haven't
already cleared the insertion point (typically via EmitBranch) can do
so by hand.

Remove isDummyBlock, which has effectively been renamed to
HaveInsertPoint.

The main thrust of this change is that we no longer have create dummy
blocks just to destroy them a short time later in EmitBlock in the
common case that there is no unreachable code following something like
a goto. 

Additionally, this means that we are not using the hokey condition in
isDummyBlock that a block without a name is a dummy block. Guess how
well that works when we never emit block names!

llvm-svn: 59089

invariants.

llvm-svn: 59085

llvm-svn: 59081

Patch by Ilya Okonsky!

llvm-svn: 59080

- Added support for ObjCForCollectionStmt
- Fixed bug where expression values would be always set to uninitialized when loops were involved

llvm-svn: 59076

llvm-svn: 59075

llvm-svn: 59073

llvm-svn: 59061

install directory"

Patch by Lukasz Janyst!

llvm-svn: 59059

Introduce a single AST node SizeOfAlignOfExpr for all sizeof and alignof expressions, both of values and types.

llvm-svn: 59057

llvm-svn: 59053

http://developer.apple.com/documentation/Cocoa/Conceptual/ObjectiveC/Articles/chapter_7_section_2.html#//apple_ref/doc/uid/TP30001163-CH18-SW3

Need to modify GRExprEngine, LiveVariables, and UninitializedValues to understand this construct.

llvm-svn: 59049

llvm-svn: 59042

 - Emits an unconditional branch, with extra logic to avoid generating
   spurious branches out of dummy blocks.

llvm-svn: 59037

llvm-svn: 59036

the size of the -O0 output on some cases.  For example, on expr.c from
176.gcc, it shrinks the .ll file from 43164 to 42835 lines, and removed
references to two external symbols.

llvm-svn: 59034

condition is a constant.  This shrinks -O0 codegen by quite a bit
on some cases.

llvm-svn: 59033

llvm-svn: 59032

llvm-svn: 59031

Don't free AST consumer when --disable-free is set.

llvm-svn: 59030

llvm-svn: 59029

llvm-svn: 59028

llvm-svn: 59027

llvm-svn: 59024

"dummy" blocks (blocks just used to make sure we have a place to dump
code to).

llvm-svn: 59022

 - Was confusing and only used in one small part of the code.

llvm-svn: 59020

llvm-svn: 59019

 - No functionality change.

llvm-svn: 59017

llvm-svn: 59015

llvm-svn: 59014

llvm-svn: 59013

llvm-svn: 59000

llvm-svn: 58996

llvm-svn: 58990

llvm-svn: 58989

llvm-svn: 58988

llvm-svn: 58987

Some cleanups to the declaration/checking of overloaded operators in C++. Thanks to Sebastian for the review

llvm-svn: 58986

llvm-svn: 58985

llvm-svn: 58983