llvm-svn: 114278

llvm-svn: 114277

llvm-svn: 114273

Added a separate class (PBQPBuilder) for PBQP Problem construction. This class can be extended to support custom constraints.

For now the allocator still uses the old (internal) construction mechanism by default. This will be phased out soon assuming 
no issues with the builder system come up.

To invoke the new construction mechanism just pass '-regalloc=pbqp -pbqp-builder' to llc. To provide custom constraints a
Target just needs to extend PBQPBuilder and pass an instance of their derived builder to the RegAllocPBQP constructor.

llvm-svn: 114272

llvm-svn: 114270

NO path to the destination containing side effects, not that SOME path contains no side effects.
In  practice, this only manifests with CombinerAA enabled, because otherwise the chain has little
to no branching, so "any" is effectively equivalent to "all".

llvm-svn: 114268

llvm-svn: 114263

thumb with floating point.

llvm-svn: 114256

llvm-svn: 114254

instructions (PICADD, PICLDR, et.al.)

llvm-svn: 114243

with one in the generic printing code is an error.

llvm-svn: 114242

llvm-svn: 114240

llvm-svn: 114237

value should be in GPRs when it's going to be used as a scalar, and we use
VMOVRRD to make that happen, but if the value is converted back to a vector
we need to fold to a simple bit_convert.  Radar 8407927.

llvm-svn: 114233

and shift instructions on ARM. Update the tests to match.

llvm-svn: 114230

llvm-svn: 114229

1) Do forward copy propagation. This makes it easier to estimate the cost of the
   instruction being sunk.
2) Break critical edges on demand, including cases where the value is used by
   PHI nodes.
Critical edge splitting is not yet enabled by default.

llvm-svn: 114227

llvm-svn: 114226

llvm-svn: 114222

llvm-svn: 114220

llvm-svn: 114219

llvm-svn: 114215

llvm-svn: 114212

This fixes rdar://8396318.

llvm-svn: 114201

llvm-svn: 114196

llvm-svn: 114195

instruction lowering.

llvm-svn: 114191

What a weird instruction.

llvm-svn: 114190

llvm-svn: 114184

llvm-svn: 114183

llvm-svn: 114176

It is also workaround for PR7927.

llvm-svn: 114175

llvm-svn: 114173

used on Darwin anymore, and Clang might not always link with the library it is
currently found in.

llvm-svn: 114165

expression to include the modifier.
 - Gross, but this a corner case we don't expect to see often in practice, but
   it is worth accepting.
 - Also improves diagnostics on invalid modifiers.

llvm-svn: 114154

so that it detects errors on platforms where libm doesn't set errno.
It's still subject to host libm details though.

llvm-svn: 114148

because it was using Twine.h's declaration of operator<<(const Twine &).

llvm-svn: 114141

Allow the PassRegistry mutex to be lazily initialized, and clean up the global namespace at the same time.

llvm-svn: 114131

synchronize any method that might lazily initialize the pImpl.

llvm-svn: 114130

llvm-svn: 114128