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

* 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: 9270

Change the Opcode enum for PHI nodes from "Instruction::PHINode" to "Instruction::PHI" to be more consistent with the other instructions.

llvm-svn: 9269

  getelementptr code path for use by other code paths (like malloc and alloca).
* Optimize comparisons with zero
* Generate neg, not, inc, and dec instructions, when possible.

This gives some code size wins, which might translate into performance.  We'll
see tommorow in the nightly tester.

llvm-svn: 9267

llvm-svn: 9266

This fixes PR#44.

llvm-svn: 9252

llvm-svn: 9251

llvm-svn: 9250

This also fixes miscompilation of 176.gcc.

llvm-svn: 9249

all, making it pointless for use with the code generator debugger.  With it,
it works like a charm.

llvm-svn: 9245

llvm-svn: 9236

llvm-svn: 9228

llvm-svn: 9227

llvm-svn: 9226

llvm-svn: 9225

llvm-svn: 9224

Update the sparc backend to at least compile correctly with the new varargs stuff even if it's not all implemented yet.

llvm-svn: 9223

llvm-svn: 9222

more efficient encoding of varargs calls, and the new varargs intrinsics.

llvm-svn: 9221

* More dense bytecode encoding for varargs calls (like printf)
* Eliminated the extremely old bytecode format.  rev #0 is now 1.0

llvm-svn: 9220

llvm-svn: 9219

llvm-svn: 9212

displacement.

llvm-svn: 9210

ModuleProvider, which has bad consequences in lli::callAsMain() which tries to
access that same Module*.

llvm-svn: 9205

llvm-svn: 9204

Make insertFarJumpAtAddr() return void, because nothing uses its return value.
Remove some commented-out code.
Implement replaceMachineCodeForFunction() for SPARC.

llvm-svn: 9203

llvm-svn: 9202

llvm-svn: 9201

Add prototypes for recompileAndRelinkFunction() and runJITOnFunction().

llvm-svn: 9200

runJITOnFunction().

Add new method for recompiling and patching in new versions of functions,
recompileAndRelinkFunction().

llvm-svn: 9199

llvm-svn: 9196

llvm-svn: 9195

llvm-svn: 9191

Rename SlotCalculator::getValSlot() to SlotCalculator::getSlot(),
       SlotCalculator::insertValue() to SlotCalculator::getOrCreateSlot(),
       SlotCalculator::insertVal() to SlotCalculator::insertValue(), and
       SlotCalculator::doInsertVal() to SlotCalculator::doInsertValue().

llvm-svn: 9190

llvm-svn: 9187