Patch by Tareq Siraj.


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Make IntInits and ListInits typed.  This helps deduce types of !if and
other operators.  For the rare cases where a list type cannot be
deduced, provide a []<type> syntax, where <type> is the list element
type.


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Make !if short-circuit when possible.


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Add a !regmatch operator to do pattern matching in TableGen.


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relocation sections.


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converting from an MMX vector to an i64.



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Also create isValidElementType for ArrayType, PointerType, StructType and
VectorType.

Make LLParser use them. This closes up some holes like an assertion failure on:

  %x = type {label}

but largely doesn't change any semantics. The only thing we accept now which
we didn't before is vectors of opaque type such as "<4 x opaque>". The opaque
can be resolved to an int or float when linking.


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Nice addition to the examples and also a starting point for Sanjiv to work on.

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on x86 to handle more cases.  Fix a bug in said code that would cause it 
to read past the end of an object.  Rewrite the code in 
SelectionDAGLegalize::ExpandBUILD_VECTOR to be a bit more general. 
Remove PerformBuildVectorCombine, which is no longer necessary with 
these changes.  In addition to simplifying the code, with this change, 
we can now catch a few more cases of consecutive loads.



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crash LLVM first.


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instructions.



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to gcc.


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Fixes PR4314.


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sometimes it can find simplifications that won't be found otherwise.



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Instructions.

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SCEVCouldNotCompute, and not SCEVUnknown.


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types.



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Also, there were a bunch of flags with no text in --help because the square
brackets were in the wrong place. I've fixed those too.


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nodes for vectors with an i16 element type.  Add an optimization for 
building a vector which is all zeros/undef except for the bottom 
element, where the bottom element is an i8 or i16.



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conversions for x86, like <2 x i32> -> <2 x float> and <4 x i16> -> 
<4 x float>.



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integer type to be consistent with normal operation legalization.  No visible
change because nothing is actually using this at the moment.



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