benchmarks, and that it can be simplified to X/Y.  (In general you can only
simplify (Z*Y)/Y to Z if the multiplication did not overflow; if Z has the
form "X/Y" then this is the case).  This patch implements that transform and
moves some Div logic out of instcombine and into InstructionSimplify.
Unfortunately instcombine gets in the way somewhat, since it likes to change
(X/Y)*Y into X-(X rem Y), so I had to teach instcombine about this too.
Finally, thanks to the NSW/NUW flags, sometimes we know directly that "Z*Y"
does not overflow, because the flag says so, so I added that logic too.  This
eliminates a bunch of divisions and subtractions in 447.dealII, and has good
effects on some other benchmarks too.  It seems to have quite an effect on
tramp3d-v4 but it's hard to say if it's good or bad because inlining decisions
changed, resulting in massive changes all over.

llvm-svn: 124487

llvm-svn: 124486

llvm-svn: 124485

Pure motion.

llvm-svn: 124484

for CodeGen's RValue type.

llvm-svn: 124483

functionality change.

llvm-svn: 124482

fixing a crash which probably nobody was ever going to see.  In doing so,
fix a horrendous number of problems with the conditional-cleanups code.
Also, make conditional cleanups re-use the cleanup's activation variable,
which avoids some unfortunate repetitiveness.

llvm-svn: 124481

llvm-svn: 124480

llvm-svn: 124479

llvm-svn: 124478

llvm-svn: 124477

ret duplication.

llvm-svn: 124476

the function equality set.

llvm-svn: 124475

llvm-svn: 124474

test.

llvm-svn: 124473

llvm-svn: 124472

llvm-svn: 124471

llvm-svn: 124470

llvm-svn: 124469

llvm-svn: 124468

llvm-svn: 124467

set ip to some stack offset) entries to the g_arm_opcodes table.

llvm-svn: 124466

might be queried in places where we absolutely require a valid
location (e.g., for template instantiation). Fixes some major
brokenness in the use of __is_convertible_to.

llvm-svn: 124465

llvm-svn: 124464

The thread_info changes over the life of the thread, so you can't get it once and cache it, you have to fetch it every time you want to use it.

llvm-svn: 124463

  branches. PR8575, rdar://5134905, rdar://8911460.
- Allow codegen tail duplication to dup small return blocks after register
  allocation is done.

llvm-svn: 124462

The context being that it's a PC relative load.

llvm-svn: 124460

If the user specfies one of stdin, stdout or stderr, don't
automatically set the non-specified ones to /dev/null.

llvm-svn: 124459

llvm-svn: 124458

llvm-svn: 124456

llvm-svn: 124455

only .syntax unified is supported.

llvm-svn: 124454

non-class prvalues actually require the realization of a
temporary. For everything else, we already have an lvalue (or class
prvalue) in the subexpression.

Note: we're missing some move elision in this case. I'll tackle that next.
llvm-svn: 124453

llvm-svn: 124452

variable declaration of a struct declared type.
// rdar://8918702

llvm-svn: 124451

llvm-svn: 124450

location was stated with FFI_INCLUDE_DIR/FFI_LIBRARY_DIR.

llvm-svn: 124449

PC relative immediate load into register, possibly followed by an add operation
to adjust the SP.

llvm-svn: 124448

[AVX] Clean up the code to configure target lowering for AVX.  Specify
how to lower more/new operations.  This is a prerequisite for adding
additional AVX lowering.

llvm-svn: 124447

access control errors into SFINAE errors, so that the trait provides
enough support to implement the C++0x std::is_convertible type trait.

To get there, the SFINAETrap now knows how to set up a SFINAE context
independent of any template instantiations or template argument
deduction steps, and (separately) can set a Sema flag to translate
access control errors into SFINAE errors. The latter can also be
useful if we decide that access control errors during template argument
deduction should cause substitution failure (rather than a hard error)
as has been proposed for C++0x.

llvm-svn: 124446