llvm-svn: 9314

llvm-svn: 9313

llvm-svn: 9312

llvm-svn: 9311

llvm-svn: 9310

llvm-svn: 9309

llvm-svn: 9308

llvm-svn: 9307

llvm-svn: 9306

llvm-svn: 9305

llvm-svn: 9304

llvm-svn: 9303

llvm-svn: 9302

llvm-svn: 9301

llvm-svn: 9300

llvm-svn: 9299

Header files will be on the way.

llvm-svn: 9298

llvm-svn: 9297

llvm-svn: 9296

llvm-svn: 9295

llvm-svn: 9294

llvm-svn: 9293

llvm-svn: 9292

llvm-svn: 9291

between the "Getting Started Quickly" and "Getting Started Slowly" sections.
:)
Removed some of the nit-picky requirements information (i.e. GNU tar and
GNU zip).
Attempted to compact the requirements information so that it is less scary.

llvm-svn: 9290

llvm-svn: 9289

llvm-svn: 9288

Make it assert by default.

llvm-svn: 9287

when changing Instruction.def.  :(

llvm-svn: 9286

llvm-svn: 9285

C is a constant which can be sign-extended from 8 bits without value loss,
and op is one of: add, sub, imul, and, or, xor.

This allows the JIT to emit the one byte version of the constant instead of
the two or 4 byte version.  Because these instructions are very common, this
can save a LOT of code space.  For example, I sampled two benchmarks, 176.gcc
and 254.gap.

BM        Old     New    Reduction
176.gcc 2673621 2548962  4.89%
254.gap  498261  475104  4.87%

Note that while the percentage is not spectacular, this did eliminate
124.6 _KILOBYTES_ of codespace from gcc.  Not bad.

Note that this doesn't effect the llc version at all, because the assembler
already does this optimization.

llvm-svn: 9284

llvm-svn: 9283

llvm-svn: 9282

llvm-svn: 9281

llvm-svn: 9280

* Added description of `mem2reg'

llvm-svn: 9279

* Implement R1 = R2 * C where R1 and R2 are 32 or 16 bits. This avoids an
  extra copy into a register, reducing register pressure.

llvm-svn: 9278

llvm-svn: 9274

debugging with the JIT

llvm-svn: 9273

llvm-svn: 9272