Fixed some tests to avoid LiveIntervals::getInstructionFromIndex(..) overhead where possible. Thanks to Jakob for the suggestions.

llvm-svn: 114798

llvm-svn: 114794

Removed VNInfo::isDefAccurate(). Def "accuracy" can be checked by testing whether LiveIntervals::getInstructionFromIndex(def) returns NULL.

llvm-svn: 114791

llvm-svn: 114788

symbols defined in merge sections in independent atoms.

llvm-svn: 114786

LoadPRE was not properly checking that the load it was PRE'ing post-dominated the block it was being hoisted to.
Splitting critical edges at the merge point only addressed part of the issue; it is also possible for non-post-domination
to occur when the path from the load to the merge has branches in it.  Unfortunately, full anticipation analysis is
time-consuming, so for now approximate it.  This is strictly more conservative than real anticipation, so we will miss
some cases that real PRE would allow, but we also no longer insert loads into paths where they didn't exist before. :-)

This is a very slight net positive on SPEC for me (0.5% on average).  Most of the benchmarks are largely unaffected, but
when it pays off it pays off decently: 181.mcf improves by 4.5% on my machine.

llvm-svn: 114785

llvm-svn: 114784

llvm-svn: 114782

of the source, not the original alignment since it may no longer
be valid.

Fixes rdar://8400094

llvm-svn: 114781

llvm-svn: 114780

llvm-svn: 114779

and it will be removed shortly.

llvm-svn: 114778

llvm-svn: 114776

llvm-svn: 114768

llvm-svn: 114767

Fix scheduling itinerary for pseudo mov immediate instructions which expand into two real instructions.

llvm-svn: 114766

http://google1.osuosl.org:8011/builders/llvm-gcc-i386-linux-selfhost/builds/69

llvm-svn: 114761

llvm-svn: 114758

llvm-svn: 114750

llvm-svn: 114746

llvm-svn: 114745

http://google1.osuosl.org:8011/builders/llvm-gcc-i386-linux-selfhost

gets happy.

llvm-svn: 114742

llvm-svn: 114736

llvm-svn: 114733

llvm-svn: 114723

 - I believe more modern 'gas' supports a more enhanced set of arithmetic on
   them, but for now the only thing we can do is emit them as data.

llvm-svn: 114719

llvm-svn: 114718

llvm-svn: 114717

reflection, this isn't going to achieve the purpose I intended it for.  Back to the drawing board!

llvm-svn: 114710

llvm-svn: 114709

llvm-svn: 114707

llvm-svn: 114706

llvm-svn: 114705

llvm-svn: 114703

llvm-svn: 114696

(2 == STB_WEAK | STB_GLOBAL).

llvm-svn: 114690

llvm-svn: 114689

Fix r114632. Return if the only terminator is an unconditional branch after the redundant ones are deleted.

llvm-svn: 114688

constant. Hopefully the non-Darwin bots will like it...

llvm-svn: 114687

llvm-svn: 114686