llvm-svn: 62359

llvm-svn: 62358

CreateVirtualRegisters does trivial copy coalescing. If a node def is used by a single CopyToReg, it reuses the virtual register assigned to the CopyToReg. This won't work for SDNode that is a clone or is itself cloned. Disable this optimization for those nodes or it can end up with non-SSA machine instructions.

llvm-svn: 62356

PR3334.

llvm-svn: 62352

llvm-svn: 62351

llvm-svn: 62350

llvm-svn: 62341

llvm-svn: 62338

Change isGVCompilationDisabled() semantics again. It should abort on any GV that's not constant whether it's "internal" or not. In a server / client environment, GV is returned in the same block of memory as code. However, the memory might not be writable.

llvm-svn: 62336

llvm-svn: 62330

llvm-svn: 62328

warning.

llvm-svn: 62327

Make the debugging dump be a full line.

llvm-svn: 62325

Split Support/Registry.h into two files so that we have less to
recompile every time CommandLine.h is changed.

llvm-svn: 62312

llvm-svn: 62307

llvm-svn: 62299

llvm-svn: 62298

Clean up previous cast optimization a bit. Also make zext elimination a bit more aggressive: if it's not necessary to emit an AND (i.e. high bits are already zero), it's profitable to evaluate the operand at a different type.

llvm-svn: 62297

llvm-svn: 62294

a new toy hazard recognizier heuristic which attempts to direct the
scheduler to avoid clumping large groups of loads or stores too densely.

llvm-svn: 62291

llvm-svn: 62288

Validate dbg_* intrinsics before lowering them.

llvm-svn: 62286

llvm-svn: 62285

to support MachineInstr-based scheduling in addition to
SDNode-based scheduling.

llvm-svn: 62284

loops, hoisting instructions all the way out in one step rather
than hoisting them one nest level at a time. Also, make a few
other code simplifications. This speeds up MachineLICM
by several fold.

llvm-svn: 62283

llvm-svn: 62282

llvm-svn: 62281

llvm-svn: 62279

llvm-svn: 62276

and into the ScheduleDAGInstrs class, so that they don't get
destructed and re-constructed for each block. This fixes a
compile-time hot spot in the post-pass scheduler.

To help facilitate this, tidy and do some minor reorganization
in the scheduler constructor functions.

llvm-svn: 62275

llvm-svn: 62272

this fixes PR3332

llvm-svn: 62271

Use light weight DebugInfo object directly.

llvm-svn: 62269

llvm-svn: 62267

previous commit.

llvm-svn: 62266

llvm-svn: 62265

llvm-svn: 62264

- Looking at the number of sign bits of the a sext instruction to determine  whether new trunc + sext pair should be added when its source is being evaluated in a different type.

llvm-svn: 62263

llvm-svn: 62262

llvm-svn: 62260