that still fails (because all the register spill weights are inf), just grab
one.

llvm-svn: 28262

llvm-svn: 28261

llvm-svn: 28260

Bug identified by coverity.

llvm-svn: 28259

llvm-svn: 28258

llvm-svn: 28257

object is never deleted though.

llvm-svn: 28256

llvm-svn: 28255

llvm-svn: 28254

llvm-svn: 28253

llvm-svn: 28252

created by reading the symbol table.

llvm-svn: 28251

llvm-svn: 28250

llvm-svn: 28249

llvm-svn: 28248

llvm-svn: 28247

        %tmp152 = setgt uint %tmp144, %tmp149           ; <bool> [#uses=1]
        %tmp159 = setlt uint %tmp144, %tmp149           ; <bool> [#uses=1]
        %bothcond2 = or bool %tmp152, %tmp159           ; <bool> [#uses=1]

To setne, not setune, which causes an assertion fault.

llvm-svn: 28244

Nate, please verify that if InsertMask is 0, rlwimi shouldn't be used.
This fixes the crash and causes no PPC testsuite regressions.

llvm-svn: 28243

This continues the work on PR 761.

llvm-svn: 28239

TargetData.h.  This should make recompiles a bit faster with my current
TargetData tinkering.

llvm-svn: 28238

llvm-svn: 28237

llvm-svn: 28236

llvm-svn: 28235

string representation.

This is part of PR 761.

llvm-svn: 28234

simplify tf(x,y,y,z) -> tf(x,y,z).

llvm-svn: 28233

If a two-address code whose first operand has uses below, it should be commuted
when possible.

llvm-svn: 28230

llvm-svn: 28229

people aren't reusing machine code buffers at all.

llvm-svn: 28228

Finally, implement ExecutionEngine::freeMachineCodeForFunction.

llvm-svn: 28227

separate file. Added an initial implementation of top-down register pressure
reduction list scheduler.

llvm-svn: 28226

allocation policies and much more.  All this complexity, and we have no
functionality change, woo! :)

llvm-svn: 28225

When doing the initial pass of constant folding, if we get a constantexpr,
simplify the constant expr like we would do if the constant is folded in the
normal loop.

This fixes the missed-optimization regression in
Transforms/InstCombine/getelementptr.ll last night.

llvm-svn: 28224

llvm-svn: 28223

spilled.

llvm-svn: 28220

llvm-svn: 28219

the use follows def immediately, it doesn't make sense to spill it and
hope it will be easier to allocate for this LI.

llvm-svn: 28217

1. Implement InstCombine/deadcode.ll by not adding instructions in unreachable
   blocks (due to constants in conditional branches/switches) to the worklist.
   This causes them to be deleted before instcombine starts up, leading to
   better optimization.

2. In the prepass over instructions, do trivial constprop/dce as we go.  This
   has the effect of improving the effectiveness of #1.  In addition, it
   *significantly* speeds up instcombine on test cases with large amounts of
   constant folding code (for example, that produced by code specialization
   or partial evaluation).  In one example, it speeds up instcombine from
   0.0589s to 0.0224s with a release build (a 2.6x speedup).

llvm-svn: 28215

really a bad codegen bug that LLC happens to get lucky with. I must chat with
Nate for the proper fix.

llvm-svn: 28213

llvm-svn: 28212

llvm-svn: 28210