other than PPC64. Instead of fixing it, just remove it and fix all the
places that use it to use TargetData::getPointerSize() instead, as there
aren't very many. Most of the references were in DwarfWriter.cpp.

llvm-svn: 42419

It includes:

 - location and of each safe point in machine code (identified by a
   label)
 - location of each root within the stack frame (identified by an
   offset), including the metadata tag provided to llvm.gcroot in
   the user program
 - size of the stack frame (for collectors which want to cheat on
   stack crawling :)
 - and eventually will include liveness

It is to be populated by back-ends during code-generation.

CollectorModuleMetadata aggregates this information across the
entire module.

llvm-svn: 42418

llvm-svn: 42417

llvm-svn: 42416

registry for dynamically-loaded garbage collection compiler plugins.

llvm-svn: 42415

capabilities. This is a major rewrite and is easier to read en toto
rather than patchwise.

llvm-svn: 42414

llvm-svn: 42413

Patch for method implementation. It populates ObjcImplementationDecl object with method implementation declarations .
It checks and warns on those methods declared in class interface and not implemented.

llvm-svn: 42412

Fix bug in SelectorInfo::getName() - method buffer needs to be passed by reference.

llvm-svn: 42411

llvm-svn: 42410

values associated with ScopedDecls and CFGBlock-level Exprs.  This is the common
boilerplate needed by UninitializedValues and LiveVariables.

Refactored UninitializedValues to use ExprDeclBitVector.

Shortened the string diagnostic for UninitializedValues.

llvm-svn: 42408

llvm-svn: 42407

llvm-svn: 42406

llvm-svn: 42405

llvm-svn: 42398

llvm-svn: 42397

llvm-svn: 42396

Add SelectorInfo (similar in spirit to IdentifierInfo). The key difference is SelectorInfo is not string-oriented, it is a unique aggregate of IdentifierInfo's (using a folding set).  SelectorInfo also has a richer API that simplifies the parser/action interface. 3 noteworthy benefits:

#1: It is cleaner. I never "liked" storing keyword selectors (i.e. foo:bar:baz) in the IdentifierTable.

#2: It is more space efficient. Since Cocoa keyword selectors can be quite long, this technique is space saving. For Cocoa.h, pulling the keyword selectors out saves ~180k. The cost of the SelectorInfo data is ~100k. Saves ~80k, or 43%.

#3: It results in many API simplifications. Here are some highlights:

- Removed 3 actions (ActOnKeywordMessage, ActOnUnaryMessage, & one flavor of ObjcBuildMethodDeclaration that was specific to unary messages).
- Removed 3 funky structs from DeclSpec.h (ObjcKeywordMessage, ObjcKeywordDecl, and ObjcKeywordInfo).
- Removed 2 ivars and 2 constructors from ObjCMessageExpr (fyi, this space savings has not been measured).

I am happy with the way it turned out (though it took a bit more hacking than I expected). Given the central role of selectors in ObjC, making sure this is "right" will pay dividends later.

Thanks to Chris for talking this through with me and suggesting this approach. 

llvm-svn: 42395

llvm-svn: 42394

llvm-svn: 42393

llvm-svn: 42392

llvm-svn: 42391

llvm-svn: 42389

llvm-svn: 42388

llvm-svn: 42387

llvm-svn: 42385

llvm-svn: 42384

destruction of compiler-created ones.

llvm-svn: 42383

llvm-svn: 42382

fixing:

VoidMethod.m:14:5: warning: expression result unused
    [Greeter hello];
    ^~~~~~~~~~~~~~~

llvm-svn: 42380

llvm-svn: 42377

Added assertion that Block-level statements should not be NULL.

llvm-svn: 42376

- Added ability to emit cross class register copies to the BBRU scheduler.
- More aggressive backtracking.

llvm-svn: 42375

llvm-svn: 42374

llvm-svn: 42373

- Added MRegisterInfo::getCrossCopyRegClass() hook. For register classes where reg to reg copies are not possible, this returns another register class which registers in the specified register class can be copied to (and copy back from).
- X86 copyRegToReg() now supports copying between EFLAGS and GR32 / GR64 registers.

llvm-svn: 42372

Some assemblers do not recognize aliases pushfd, pushfq, popfd, and popfq. Just emit them as pushf and popf.

llvm-svn: 42371

BUG 1) 

CFG failed to build for empty functions, or functions containing only
NullStmts or empty compound statements.

We now handle such cases, although now we cannot test for CFG
construction failure by asserting that the last block constructed is
not NULL (since it now may be).

BUG 2)

CFG construction segfaulted on some cases when walking the AST and not
taking into account that some children of a statement may be NULL.

llvm-svn: 42370

for direct codegen of fsin/fcos.

llvm-svn: 42369

llvm-svn: 42368