Document raw_fd_ostream's treatment of "-".

llvm-svn: 59219

llvm-svn: 59218

 - Logic such as this quite possibly should be optional builder
   behavior.

llvm-svn: 59213

little rude; I figure it's cleaner to just back this out now so 
it doesn't get forgotten or mixed up with other checkins.

The modification to isICE is simply wrong; I've added a test that the 
change to isICE breaks.

I'm pretty sure the modification to tryEvaluate is also wrong.  
At the very least, there's some serious miscommunication going on here, 
as this is going in exactly the opposite direction of r59105.  My 
understanding is that tryEvaluate is not supposed to care about side 
effects.  That said, a lot of the clients to tryEvaluate are 
expecting it to enforce a no-side-effects policy, so we probably need 
another method that provides that guarantee.

llvm-svn: 59212

landing pads.
 - Primarily a cleanliness issue instead of a performance issue (this
   eliminates all blocks w/o predecessors on 176.gcc/expr.c), but this
   also allows subsequent code to recognize it is unreachable and
   potentially avoid IRgen.

llvm-svn: 59211

 - Use dotted notation for blocks related to a particular statement
   type.
 - Use .end for landing pads.

No functionality change in NDEBUG mode. :)

llvm-svn: 59210

llvm-svn: 59209

llvm-svn: 59208

 - Indicates that caller is done with the block and it can be dropped
   if it has no predecessors. Useful for callers who need to make
   landing pads but which may not be reached.

No functionality change.

llvm-svn: 59207

llvm-svn: 59206

llvm-svn: 59204

llvm-svn: 59203

llvm-svn: 59202

more confusing ifelse.

Use dotted names for if blocks (if.then vs ifthen).

llvm-svn: 59201

Fix bug where the body block of an ObjCForCollectionStmt would not properly get expanded as a series of basic blocks.

llvm-svn: 59197

 - Evaluation of , operator used bogus assumption that LHS could be
   evaluated as an integral expression even though its type is
   unspecified.

This change is making isICE very permissive of the LHS in non-evaluated 
contexts because it is not clear what predicate we would use to reject 
code here. The standard didn't offer me any guidance; opinions?

llvm-svn: 59196

llvm-svn: 59195

virtual registers possibly having multiple kills while still
being defined and killed in the same block. If LiveIntervals
is manually re-run after two-address lowering, it currently
does add extra kills to two-address instructions, but this
is considered a bug.

llvm-svn: 59194

conversion functions. Instead, we just use a placeholder identifier
for these (e.g., "<constructor>") and override NamedDecl::getName() to
provide a human-readable name.

This is one potential solution to the problem; another solution would
be to replace the use of IdentifierInfo* in NamedDecl with a different
class that deals with identifiers better. I'm also prototyping that to
see how it compares, but this commit is better than what we had
previously.

llvm-svn: 59193

llvm-svn: 59192

llvm-svn: 59191

special-purpose hook to a new pass. Also, add check to see if any
x87 virtual registers are used, to avoid doing any work in the
common case that no x87 code is needed.

llvm-svn: 59190

llvm-svn: 59188

llvm-svn: 59187

llvm-svn: 59186

PreprocessorLexer now has a virtual method "IndirectLex" which allows it to call the lex method of its subclasses.  This is not for performance intensive operations.

llvm-svn: 59185

something that is not an int.

 - Ignore these cases for now, added FIXME that we should also boolize
   them.

llvm-svn: 59184

llvm-svn: 59181

llvm-svn: 59180

Add Preprocessor::PushIncludeMacroStack() and Preprocessor::PopIncludeMacroStack(), two utility methods for manipulating the Preprocessor stack.  These will be used to remove manually manipulation of IncludeMacroStack from the rest of the Preprocessor implementation.

llvm-svn: 59179

Update CFGStmtVisitor to recognize that ObjCForCollectionStmts are special block-level "expressions".

llvm-svn: 59176

llvm-svn: 59174

llvm-svn: 59173

llvm-svn: 59170

llvm-svn: 59169

Move pieces of Lexer that the Preprocessor mutates to a new base class 'PreprocessorLexer'.  This will also be the base class of the new Preprocessed-Token-Header (PTH) lexer.  No functionality change.

llvm-svn: 59168

llvm-svn: 59167

llvm-svn: 59165

llvm-svn: 59163

llvm-svn: 59162