Amara Emerson
5901f854c7
[GlobalISel] Introduce G_BUILD_VECTOR, G_BUILD_VECTOR_TRUNC and G_CONCAT_VECTOR opcodes. ...
These opcodes are intended to subsume some of the capability of G_MERGE_VALUES,
as it was too powerful and thus complex to add deal with throughout the GISel
pipeline.
G_BUILD_VECTOR creates a vector value from a sequence of uniformly typed
scalar values. G_BUILD_VECTOR_TRUNC is a special opcode for handling scalar
operands which are larger than the destination vector element type, and
therefore does an implicit truncate.
G_CONCAT_VECTOR creates a vector by concatenating smaller, uniformly typed,
vectors together.
These will be used in a subsequent commit. This commit just adds the initial
infrastructure.
Differential Revision: https://reviews.llvm.org/D53594
llvm-svn: 348430
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