Creates a configurable regalloc pipeline.

Ensure specific llc options do what they say and nothing more: -reglloc=... has no effect other than selecting the allocator pass itself. This patch introduces a new umbrella flag, "-optimize-regalloc", to enable/disable the optimizing regalloc "superpass". This allows for example testing coalscing and scheduling under -O0 or vice-versa.

When a CodeGen pass requires the MachineFunction to have a particular property, we need to explicitly define that property so it can be directly queried rather than naming a specific Pass. For example, to check for SSA, use MRI->isSSA, not addRequired<PHIElimination>.

CodeGen transformation passes are never "required" as an analysis

ProcessImplicitDefs does not require LiveVariables.

We have a plan to massively simplify some of the early passes within the regalloc superpass.

llvm-svn: 150226

llvm-svn: 150225

llvm-svn: 150224

in many APIs and large codebases that this made the deprecated warning trigger happy to
the point of not being useful.

llvm-svn: 150223

rdar://10838899

llvm-svn: 150222

Make sure we convert struct layout pragmas to attributes for class templates the same way we do for non-template classes.  <rdar://problem/10791194>.

llvm-svn: 150221

When checking a local live range for interference, restrict the binary
search to the single block.

llvm-svn: 150220

Provide API to get a list of register mask slots and bits in a basic
block.

llvm-svn: 150219

No looping and binary searches necessary.

Return a pointer to the containing block instead of just a bool.

llvm-svn: 150218

parser.  Specifically:

- ClangUserExpression now keeps weak pointers to the
  structures it needs and then locks them when needed.
  This ensures that they continue to be valid without
  leaking memory if the ClangUserExpression is long
  lived.

- ClangExpressionDeclMap, instead of keeping a pointer
  to an ExecutionContext, now contains an
  ExecutionContext.  This prevents bugs if the pointer
  or its contents somehow become stale.  It also no
  longer requires that ExecutionContexts be passed
  into any function except its initialization function,
  since it can count on the ExecutionContext still
  being around.

There's a lot of room for improvement (specifically,
ClangExpressionDeclMap should also use weak pointers
insetad of shared pointers) but this is an important
first step that codifies assumptions that already
existed in the code.

llvm-svn: 150217

the checker over postgres and sqlite.

llvm-svn: 150216

(use of return instead of continue), wording.

llvm-svn: 150215

llvm-svn: 150214

fixing a macro name mismatch that was making our test case succeed for the wrong reason; plus a minor code change to the CPP side of the test which eases debugging efforts

llvm-svn: 150213

llvm-svn: 150212

by GetClangDeclContextContainingDIE, for better
debuggability.

llvm-svn: 150211

llvm-svn: 150210

llvm-svn: 150209

This looks like it had a small, but measurable performance improvement on -O0
compile time for our ObjC tests.

llvm-svn: 150208

llvm-svn: 150207

has been declared in its primary class, superclass,
or in one of their protocols, no need to issue unimplemented method. 
// rdar://10823023

llvm-svn: 150206

llvm-svn: 150205

Make sure a variable with a C++ direct initializer triggers jump scope checking.  Fixes PR10620 / <rdar://problem/9958362> .

llvm-svn: 150204

enable us to track the depth of parsing and what is being parsed. This
helps when trying to track down difficult type parsing issues and is only
enabled in non-production builds.

llvm-svn: 150203

It was never updated for API changes in r149311/r149336/r149339
and r147688.

llvm-svn: 150202

Hardcoding the location of the build directory seems like it would
break at `make install`/packaging time.

llvm-svn: 150201

Double fields of by-value class objects should be passed in floating point
registers.

llvm-svn: 150200

Kill the brief and full explanation fields from StaticDiagInfoRec. They were unused and wasted space for nothing.

- per PR11952.

llvm-svn: 150199

llvm-svn: 150198

Unify default construction of error_code uses on this idiom so that users don't
feel compelled to make static globals for naming convenience. (unfortunately I
couldn't make the original ctor private as some APIs don't return their result,
instead using an out parameter (that makes sense to default construct) - which
is a bit of a pity. I did, however, find/fix some cases of unnecessary default
construction of error_code before I hit the unfixable cases)

llvm-svn: 150197

class objects follow the same rules as those returning struct objects.

llvm-svn: 150196

Also fix a logic error for a missing return stmt. Oops.

llvm-svn: 150195

list; it is not an expression.

llvm-svn: 150194

llvm-svn: 150193

llvm-svn: 150192

This only adds the interference checks required for correctness.
We still need to take advantage of register masks for the
interference driven live range splitting.

llvm-svn: 150191

semantics. 

llvm-svn: 150190

Now subprogram descriptors are not collected by llvm.dbg.sp NamedMDNode. Update document to reflect this change.

llvm-svn: 150187

llvm-svn: 150185

llvm-svn: 150184