packed types with an element count of 1, although more generic support is
coming.  This allows LLVM to turn the following code:

void %foo(<1 x float> * %a) {
entry:
  %tmp1 = load <1 x float> * %a;
  %tmp2 = add <1 x float> %tmp1, %tmp1
  store <1 x float> %tmp2, <1 x float> *%a
  ret void
}

Into:

_foo:
        lfs f0, 0(r3)
        fadds f0, f0, f0
        stfs f0, 0(r3)
        blr

llvm-svn: 24416

llvm-svn: 24415

half the problem.

llvm-svn: 24414

llvm-svn: 24413

llvm-svn: 24412

has a single def.  In this case, look for uses that are dominated by the def
and attempt to rewrite them to directly use the stored value.

This speeds up mem2reg on these values and reduces the number of phi nodes
inserted.  This should address PR665.

llvm-svn: 24411

llvm-svn: 24410

llvm-svn: 24409

llvm-svn: 24408

a new properlyDominates method to do what the old one did.

llvm-svn: 24407

llvm-svn: 24406

llvm-svn: 24405

Next step: generating vector dag nodes, and legalizing them into scalar
code.

llvm-svn: 24404

non-static codegen.

llvm-svn: 24403

compiling mysql reported by Ted Kremenek.

llvm-svn: 24402

llvm-svn: 24401

llvm-svn: 24400

gcc -static produces on PPC.  This is used for building kexts and other things.

With this, materializing the address of a global looks like:

        lis r2, ha16(L_H$non_lazy_ptr)
        la r3, lo16(L_H$non_lazy_ptr)(r2)

we're still emitting stubs for functions, which is wrong.  That is next.

llvm-svn: 24399

nodes of load results, not of their chain results.

llvm-svn: 24398

of some code.  This exposes the implicit load from the stubs to the DAG, allowing
them to be optimized by the dag combiner.  It also moves darwin specific stuff
out of the isel into the legalizer, and allows more to be moved to the .td file.

llvm-svn: 24397

llvm-svn: 24396

llvm-svn: 24395

llvm-svn: 24394

llvm-svn: 24393

llvm-svn: 24392

llvm-svn: 24391

on Darwin to remove smarts from the isel.  This is currently disabled by
default (uncomment setOperationAction(ISD::GlobalAddress to enable it).
tblgen needs to become smarter about tglobaladdr nodes and bigger patterns
needed to be added to the .td file.  However, we can currently emit stuff like
this:  :)

        li r2, lo16(L_x$non_lazy_ptr)
        lis r3, ha16(L_x$non_lazy_ptr)
        lwzx r2, r3, r2

The obvious improvements will follow.

llvm-svn: 24390

llvm-svn: 24389

lis can be used for the high part.

llvm-svn: 24388

llvm-svn: 24387

instead of a globaladdress.  This has no effect on the generated code at all.

llvm-svn: 24386

llvm-svn: 24385

Evan Cheng.

llvm-svn: 24384

on patterns like "(set R32:$dst, (i32 imm:$src))"

llvm-svn: 24383

Patch contributed by Evan Cheng!

llvm-svn: 24382

llvm-svn: 24381

llvm-svn: 24378

llvm-svn: 24377

llvm-svn: 24376

llvm-svn: 24375