GVN and into its own pass.

llvm-svn: 49419

llvm-svn: 49418

llvm-svn: 49417

particular value but variable type.

llvm-svn: 49416

llvm-svn: 49415

start migrating code over to use it.

llvm-svn: 49413

add support for  pow(x, 2.0) -> x*x.

llvm-svn: 49411

llvm-svn: 49410

llvm-svn: 49398

are marked nounwind when compiling without
-fexceptions.

llvm-svn: 49393

llvm-svn: 49391

llvm-svn: 49389

llvm-svn: 49382

llvm-svn: 49374

attribute for a function.

llvm-svn: 49373

llvm-svn: 49371

llvm-svn: 49367

correctly when unwind info is being generated.

llvm-svn: 49366

llvm-svn: 49365

that need it (usually, grepping for some string
found in unwind info)

llvm-svn: 49364

Corresponds to -fno-unwind-tables (usually default in gcc).

llvm-svn: 49361

llvm-svn: 49354

llvm-svn: 49352

deserializer.

llvm-svn: 49350

review feedback from Chris quite a while ago. No functionality
change.

llvm-svn: 49348

llvm-svn: 49347

Removed llvm-upgrade from documentations.

llvm-svn: 49346

in both time and memory savings for GVN.  For example, one testcase went from 10.5s to 6s with
this patch.

llvm-svn: 49345

llvm-svn: 49344

llvm-svn: 49343

llvm-svn: 49339

llvm-svn: 49338

needs to be fixed here - a previous commit made sure
that intrinsics always get the right attributes.
So remove no-longer needed code, and while there use
Intrinsic::getDeclaration rather than getOrInsertFunction. 

llvm-svn: 49337

intrinsics.  Fix up the argument type (should
be i8*, was an array*).

llvm-svn: 49336

right parameter attributes no matter how they
are obtained.

llvm-svn: 49335

by Dan Gohman is fixed.

llvm-svn: 49330

allocations, which GVN can't optimize anyways.

llvm-svn: 49329

llvm-svn: 49317

nounwind.  When such calls are inlined into something
else that is invoked, they were getting changed to invokes,
which is badness.

llvm-svn: 49299

llvm-svn: 49293