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Document that the shuffle mask may contain undef 

values.

llvm-svn: 47719
This commit is contained in:
Duncan Sands 2008-02-28 17:12:11 +00:00
parent 031a711881
commit e28886a913
1 changed files with 7 additions and 7 deletions
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10
llvm/include/llvm/CodeGen/SelectionDAGNodes.h
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@ -304,11 +304,11 @@ namespace ISD {
/// VECTOR_SHUFFLE(VEC1, VEC2, SHUFFLEVEC) - Returns a vector, of the same
/// type as VEC1/VEC2. SHUFFLEVEC is a BUILD_VECTOR of constant int values
/// (regardless of whether its datatype is legal or not) that indicate
/// which value each result element will get. The elements of VEC1/VEC2 are
/// enumerated in order. This is quite similar to the Altivec 'vperm'
/// instruction, except that the indices must be constants and are in terms
/// of the element size of VEC1/VEC2, not in terms of bytes.
/// (maybe of an illegal datatype) or undef that indicate which value each
/// result element will get. The elements of VEC1/VEC2 are enumerated in
/// order. This is quite similar to the Altivec 'vperm' instruction, except
/// that the indices must be constants and are in terms of the element size
/// of VEC1/VEC2, not in terms of bytes.
VECTOR_SHUFFLE,
/// SCALAR_TO_VECTOR(VAL) - This represents the operation of loading a