BranchProbabilityInfo provides an interface for IR passes to query the
likelihood that control follows a CFG edge. This patch provides an
initial implementation of static branch predication that will populate
BranchProbabilityInfo for branches with no external profile
information using very simple heuristics. It currently isn't hooked up
to any external profile data, so static prediction does all the work.

llvm-svn: 132613

__builtin_astype(): Used to reinterpreted as another data type of the same size using for both scalar and vector data types.
Added test case.

llvm-svn: 132612

it exposed are fixed.

llvm-svn: 132611

Emit debug info only if there is an insertion point. The debug info should not force an insertion point. Codegen may later on decide to not emit code for some reason, see extensive comment in CodeGenFunction::EmitStmt(), and debug info should not get in the way.

llvm-svn: 132610

queries in the case of a DAG, where a query reaches a node
visited earlier, but it's not on a cycle. This avoids
MayAlias results in cases where BasicAA is expected to
return MustAlias or PartialAlias in order to protect TBAA.

llvm-svn: 132609

llvm-svn: 132608

llvm-svn: 132607

rdar://problem/5993888

llvm-svn: 132606

llvm-svn: 132605

Improvements to abbreviations for PCH which add support for EnumDecl, ObjCIvarDecl, TypedefDecl, VarDecl and FieldDecl and improve support for ParmVarDecl.

llvm-svn: 132604

libclang. Fixes <rdar://problem/9537904>.

llvm-svn: 132603

llvm-svn: 132602

Materializing the stack pointer update before a call requires a scratch
register that may not be available.

llvm-svn: 132601

llvm-svn: 132600

the thread we were running on (other thread crashed or had exceptional stop
reason).

llvm-svn: 132599

constraint lengths.

Part of rdar://9037836 and rdar://9119939

llvm-svn: 132598

llvm-svn: 132597

llvm-svn: 132596

llvm-svn: 132594

suggested by Chandler.

llvm-svn: 132593

Part of rdar://9037836 and rdar://9119939

llvm-svn: 132592

Part of rdar://9037836 and rdar://9119939

llvm-svn: 132590

llvm-svn: 132589

llvm-svn: 132588

llvm-svn: 132587

llvm-svn: 132586

llvm-svn: 132585

llvm-svn: 132584

Currently the runtime dynamic linker lacks object file support for anything
other than Mach-O.

llvm-svn: 132583

llvm-svn: 132582

of reserved registers.

Use RegisterClassInfo in RABasic as well. This slightly changes som
allocation orders because RegisterClassInfo puts CSR aliases last.

llvm-svn: 132581

Previously, these aliases would be ordered alphabetically. (BH, BL)

Print out the computed allocation orders.

llvm-svn: 132580

of conservatively choosing MayAlias.

llvm-svn: 132579

llvm-svn: 132578

llvm-svn: 132577

Emit debug info only if there is an insertion point. The debug info should not force an insertion point. Codegen may later on decide to not emit code for some reason, see extensive comment in CodeGenFunction::EmitStmt(), and debug info should not get in the way.

llvm-svn: 132576

llvm-svn: 132575

llvm-svn: 132573

destructors are implemented but other special members are on the way,
which is where the real benefits of this will be visible.

llvm-svn: 132572

llvm-svn: 132571