both forward and backward scheduling. Rename it to
ScoreboardHazardRecognizer (Scoreboard is one word). Remove integer
division from the scoreboard's critical path.

llvm-svn: 121274

llvm-svn: 121273

llvm-svn: 121272

llvm-svn: 121262

llvm-svn: 121250

llvm-svn: 121238

This new register allocator is initially identical to RegAllocBasic, but it will
receive all of the tricks that RegAllocBasic won't get.

RegAllocGreedy will eventually replace linear scan.

llvm-svn: 121234

llvm-svn: 121233

should use that.

llvm-svn: 121231

llvm-svn: 121227

llvm-svn: 121226

llvm-svn: 121224

build: Don't force -flat_namespace or '-undefined suppress' on unsuspecting users of LLVM makefiles, these options really shouldn't be used on Darwin.

llvm-svn: 121223

llvm-svn: 121222

thumb vs. arm mode differences in WriteNopData().

llvm-svn: 121219

Minor optimization to the use of IntervalMap iterators. They are fairly
heavyweight, so prefer SI.valid() over SI != end().

llvm-svn: 121217

llvm-svn: 121216

the order of the bytes in the data stream is flipped around.

llvm-svn: 121215

so they can be implemented without clang builtins.

llvm-svn: 121213

llvm-svn: 121212

llvm-svn: 121211

so they can be implemented without clang builtins.

llvm-svn: 121209

so they can be used in the implementations of other intrinsics.

llvm-svn: 121208

before:
        4 assembler - Number of assembler layout and relaxation steps
    78563 assembler - Number of emitted assembler fragments
  8693904 assembler - Number of emitted object file bytes
   271223 assembler - Number of evaluated fixups
330771677 assembler - Number of fragment layouts
     5958 assembler - Number of relaxed instructions
  2508361 mcexpr    - Number of MCExpr evaluations

real	0m26.123s
user	0m25.694s
sys	0m0.388s

after:

      4 assembler - Number of assembler layout and relaxation steps
  78563 assembler - Number of emitted assembler fragments
8693904 assembler - Number of emitted object file bytes
 271223 assembler - Number of evaluated fixups
 231507 assembler - Number of fragment layouts
   5958 assembler - Number of relaxed instructions
2508361 mcexpr    - Number of MCExpr evaluations

real	0m2.500s
user	0m2.113s
sys	0m0.273s

And yes, the outputs are identical :-)

llvm-svn: 121207

llvm-svn: 121206

This is still work in progress.

llvm-svn: 121205

This speeds up RegAllocBasic by 20%, not counting releaseMemory which becomes
way faster.

llvm-svn: 121201

llvm-svn: 121200

llvm-svn: 121198

vpush instructions to save / restore VFP / NEON registers like this:
vpush {d8,d10,d11}
vpop {d8,d10,d11}

vpush and vpop do not allow gaps in the register list.
rdar://8728956

llvm-svn: 121197

llvm-svn: 121196

functionality change.

llvm-svn: 121195

llvm-svn: 121190

llvm-svn: 121187

llvm-svn: 121186

llvm-svn: 121184

llvm-svn: 121182

llvm-svn: 121180

possible. They were duplicates for everything exception the source pattern
before.

llvm-svn: 121179

llvm-svn: 121176