llvm-svn: 47329

llvm-svn: 47328

llvm-svn: 47325

llvm-svn: 47324

llvm-svn: 47323

could work don't work fully.  This fixes PR1705.  Oh yeah, we don't have
packed types anymore either ;-)

llvm-svn: 47322

Refactor this method a bit, and correct a test that was completely wrong but happened to work out anyways. :-)

llvm-svn: 47321

llvm-svn: 47320

llvm-svn: 47319

llvm-svn: 47318

In addition to arguments passed to it, memcpy (and all other calls) can ModRef pointers that alias their arguments as well.  This fixes PR2057.

llvm-svn: 47317

and add some others that should have been in from the first place.  Document the whole thing better.

llvm-svn: 47315

llvm-svn: 47314

can be a SNaN.  We could be more aggressive and turn this into 
unreachable, but that is less nice, and not really worth it.

llvm-svn: 47313

llvm-svn: 47312

llvm-svn: 47311

At some point in the future, this check will become smarter.

llvm-svn: 47310

over all the parameters of the callee looking for it.

llvm-svn: 47309

llvm-svn: 47308

to apply to a memcpy into processInstruction.  Also, fix a bug in the check due to
missing braces.

llvm-svn: 47307

llc: for the -info-output-file option:  requires a value!

llvm-svn: 47306

Fix Transforms/GVN/memcpy.ll, which Chris broke in r47275 by reordering the branches.  memcpy's are a kind of CallInst.

llvm-svn: 47305

llvm-svn: 47302

PR1909: Tail merging pass ran wild. It makes no sense to merge blocks in order to save a single instruction since a branch will be inserted for each BB.

llvm-svn: 47301

llvm-svn: 47300

llvm-svn: 47297

llvm-svn: 47296

- When DAG combiner is folding a bit convert into a BUILD_VECTOR, it should check if it's essentially a SCALAR_TO_VECTOR. Avoid turning (v8i16) <10, u, u, u> to <10, 0, u, u, u, u, u, u>. Instead, simply convert it to a SCALAR_TO_VECTOR of the proper type.
- X86 now normalize SCALAR_TO_VECTOR to (BIT_CONVERT (v4i32 SCALAR_TO_VECTOR)). Get rid of X86ISD::S2VEC.

llvm-svn: 47290

llvm-svn: 47287

on x86-32 since i64 itself is not a Legal type. And, update some
comments.

llvm-svn: 47282

- For now, conservatively ignore copy MI whose source is a physical register. Commuting its def MI can cause a physical register live interval to be live through a loop (since we know it's live coming into the def MI).

llvm-svn: 47281

llvm-svn: 47280

llvm-svn: 47279

llvm-svn: 47278

has plain one-result scalar integer multiplication instructions.
This avoids expanding such instructions into MUL_LOHI sequences that
must be special-cased at isel time, and avoids the problem with that
code that provented memory operands from being folded.

This fixes PR1874, addressesing the most common case. The uncommon
cases of optimizing multiply-high operations will require work
in DAGCombiner.

llvm-svn: 47277

to Dale for noticing this!

llvm-svn: 47276

llvm-svn: 47275

llvm-svn: 47274

requested by Chris.  While there, do the same
for an existing function committed by someone
called "lattner" :)

llvm-svn: 47273

llvm-svn: 47272