available targets unless LLVM_INCLUDE_X is ON. LLVM_BUILD_X implies
LLVM_INCLUDE_X"

It breaks the configuration phase when cmake is invoked without
parameters, it is too complex for the purpose and introduces an
incovenience for the user (as both LLVM_BUILD_X and LLVM_INCLUDE_X
must set to OFF for not including X on the build)

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



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symbols defined in merge sections in independent atoms.

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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.


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

Fixes rdar://8400094


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and it will be removed shortly.

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

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

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Be more precise when trying to XFAIL this tester: http://google1.osuosl.org:8011/builders/llvm-arm-linux

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unless LLVM_INCLUDE_X is ON. LLVM_BUILD_X implies LLVM_INCLUDE_X

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

gets happy.

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 - 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.

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


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