There already have two "dead" functions, initialize{IPO|IPA}, defined for 
similar purpose. I decide not to call these two functions for two reasons:
  o. they don't cover all LTO passes (which will soon be separated into IPO 
     and post-IPO passes)
  o. We have not yet figured out the right passes and the ordering for IPO 
     and post-IPO stages, meaning this change is only for the time being.

Since LTO passes are registered, we are now able to print IR before and 
after particular point.

For OSX users:
--------------
  "...-Wl,-mllvm -Wl,-print-after=<pass-name>" will print IR after the
  specified pass.

For Other UNIX with GNU gold linker:
------------------------------------
  "-Wl,-plugin-opt=-print-after=<pass-name>" should work.
  (NOTE: no need for "-Wl,-mllvm")

  Strip "-Wl," if flags are fed directly to linker instead of clang/clang++.

llvm-svn: 186853

llvm-svn: 186852

llvm-svn: 186851

Variadic MC instructions don't note whether the variable operands
are uses or defs, so mayAffectControlFlow() must conservatively
assume they are defs and return true if the PC is in the operand
list.

rdar://14488628

llvm-svn: 186846

Fix an obvious typo in the loop vectorizer where the cost model uses the wrong variable. The variable BlockCost is ignored.
We don't have tests for the effect of if-conversion loops because it requires a big test (that includes if-converted loops) and it is difficult to find and balance a loop to do the right thing.

llvm-svn: 186845

llvm-svn: 186844

Option aliases in option groups were previously disallowed by an assert.
As far as I can tell, there was no technical reason for this, and I would
like to be able to put cl.exe compatible options in their own group for Clang,
so let's change the assert.

llvm-svn: 186838

instructions. With this patch:

1. ldr.n is recognized as mnemonic for the short encoding
2. ldr.w is recognized as menmonic for the long encoding
3. ldr will map to either short or long encodings depending on the size of the offset

llvm-svn: 186831

This matches gnu archive behavior and since archive member order can change
which member is used, not changing the order on replacement looks like the
right thing to do.

This patch also refactors the logic for which archive member to keep and
whether to move it to a helper function (computeInsertAction). The
nesting in computeNewArchiveMembers was getting a bit confusing.

llvm-svn: 186829

GNU ar when not given the a or b modifiers replaces archive members in the
same location of the old ones. I am about to implement that in llvm-ar. For
now, just don't depend on the current llvm-ar behavior on this test.

llvm-svn: 186823

.ftz to instructions if the nvptx-f32ftz attribute is set to "true"

llvm-svn: 186820

This reverts commit r186813, which broke the bots.

llvm-svn: 186818

llvm-svn: 186815

llvm-svn: 186814

llvm-svn: 186813

llvm-svn: 186812

llvm-svn: 186811

After Ulrich's r180677 (thanks!) TableGen is intelligent enough to
handle tied constraints involving complex operands properly, so
virtually all of the ARM custom converters are now unnecessary.

llvm-svn: 186810

llvm-svn: 186809

llvm-svn: 186808

Added missing - in the header of PrologEpilogInserter.h so that editors properly realize it is a c++ header and not a c header.

llvm-svn: 186801

deallocation functions.

llvm-svn: 186798

We were incorrectly computing where to insert a member if it was replacing
a previous member that was before the insert point.

llvm-svn: 186792

llvm-svn: 186791

llvm-svn: 186790

to iterate over.

llvm-svn: 186788

llvm-svn: 186787

llvm-svn: 186786

Fix exception demo when we are building the examples with configure/make.
This commit updates the link components in the Makefile.

llvm-svn: 186785

helper function. This leaves both trivial cases handled entirely in
helper functions and merely manages the list of allocas to process in
the run method.

The next step will be to handle all of the trivial promotion work prior
to even creating the core class and the subsequent simplifications that
enables.

llvm-svn: 186784

a single block into the helper routine. This takes advantage of the fact
that we can directly replace uses prior to any store with undef to
simplify matters and unconditionally promote allocas only used within
one block.

I've removed the special handling for the case of no stores existing.
This has no semantic effect but might slow things down. I'll fix that in
a later patch when I refactor this entire thing to be easier to manage
the different cases.

llvm-svn: 186783

llvm-svn: 186782

handles the general cases.

The hope is to refactor this so that we don't end up building the entire
class for the trivial cases. I also want to lift a lot of the early
pre-processing in the initial segment of run() into a separate routine,
and really none of it needs to happen inside the primary promotion
class.

These routines in particular used none of the actual state in the
promotion class, so they don't really make sense as members.

llvm-svn: 186781

This struct is nicely independent of everything else, and we already
needed a foward declaration here. It's simpler to just define it
immediately.

llvm-svn: 186780

llvm-svn: 186779

GlobalOpt simplifies llvm.compiler.used by removing any members that are also
in the more strict llvm.used. Handle the special case where llvm.compiler.used
becomes empty.

llvm-svn: 186778

that ensued from that.

llvm-svn: 186777

pattern and conform to the naming conventions.

llvm-svn: 186776

subsequent changes don't introduce inconsistencies.

llvm-svn: 186775

llvm-svn: 186774