This happens for stuff like this:

x = cond1 || cond2 || cond3 || cond4;

llvm-svn: 59123

constant folding.

llvm-svn: 59121

shrinks code yet again by a bit.

llvm-svn: 59114

CodeGenFunction.cpp.  Change VisitConditionalOperator to use
constant fold instead of codegen'ing a constant conditional.

Change ForStmt to use EmitBranchOnBoolExpr, this shrinks
expr.c very slightly to 40239 lines.

llvm-svn: 59113

llvm-svn: 59103

llvm-svn: 59095

 - 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

llvm-svn: 59061

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

llvm-svn: 59057

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

llvm-svn: 59037

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

 - No functionality change.

llvm-svn: 59017

llvm-svn: 58681

 - No functionality change.

llvm-svn: 58546

t.c:1:13: error: cannot codegen this designators yet
int a[10] = {2, 4, [8]=9, 10};
            ^~~~~~~~~~~~~~~~~

llvm-svn: 58220

llvm-svn: 57716

llvm-svn: 57332

llvm-svn: 55759

 - Notably VLAs

llvm-svn: 55544

Objective-C property references.
 - This handles property references "more correctly" but setters still
   don't work.

llvm-svn: 55534

llvm-svn: 55410

llvm-svn: 55312

EmitScalarConversion().
 - Important for allowing Obj-C void * to id<X> casts and so on.
 - Not sure about this fix however, perhaps Type should understand
   that id is effectively a pointer type.

llvm-svn: 55311

llvm-svn: 55249

Implement Obj-C lvalue message sends (aggregate returns).

Update several places to emit more precise ErrorUnsupported warnings
  for currently unimplemented Obj-C features (main missing chunks are
  property references, Obj-C exception handling, and the for ... in
  syntax).

llvm-svn: 55234

 - Returns an RValue.
 - Reduced to only taking the CodeGenFunction, Expr, and Receiver.
 - Becomes responsible for emitting the arguments.

Add CodeGenFunction::EmitCallExprExt
 - Takes optional extra arguments to insert at the head of the call.
 - This allows the Obj-C runtimes to call into this and isolates the
   argument and call instruction generation code to one place. Upshot
   is that we now pass structures (more) correctly.

Also, fix one aspect of generating methods which take structure
arguments (for NeXT). This probably needs to be merged with the
SetFunctionAttributes code in CodeGenModule.cpp

llvm-svn: 55223

 - Drop duplicate (and broken) code for sending messages.
 - Add EmitObjCProtocolExpr to CodeGenFunction.

llvm-svn: 55024

llvm-svn: 54837

 - We are beyond the point where this shows up often and when it does
   generating miscompiled files is bad.

llvm-svn: 54836

    ObjCProtocolDecl directly.

Implement CodeGen support for forward protocol decls (no-ops are so
    nice to implement).

Also moved CGObjCRuntime.h out of CodeGenModule.h

llvm-svn: 54709

 - Was unused and generated a unnecessary load of self
(missed file)

llvm-svn: 54668

 - Implement type conversion of ObjCQualifiedIdType
 - Wire @protocol(...) to GenerateProtocolRef in ScalarExprEmitter

llvm-svn: 54666

llvm-svn: 54665

 - Changed CodeGenModule::getObjCRuntime to return reference.
 - Added CodeGenModule::hasObjCRuntime predicate.

llvm-svn: 54645

 - Remove internal uses of AST.h

llvm-svn: 54628

llvm-svn: 54605

llvm-svn: 54548

 - Changed EmitSub to work on all cases (arithmetic, ptr - int, ptr -
   ptr) so that implementation matches that of other operators.

 - Modify EmitCompoundAssign to compute and perform the appropriate
   casts of left, right, and result types for the assorted pointer
   arithmetic cases.

 - Fix EmitSub (ptr - int) case to negate the rhs *after*
   extension. This is critical when the rhs is unsigned (and needs
   extension).

 - This fixes cfrac.

 - <rdr://6115726>

llvm-svn: 54392

 - <rdar://problem/6122967>

llvm-svn: 54338

 - Follows emission scheme used by llvm-gcc, i.e. invent an id for
   each label whose address is taken and replace each indirect goto by
   a switch to each possible target.
 - Currently we emit a switch for each indirect goto instead of
   merging them as llvm-gcc does.

llvm-svn: 54318