[PATCH] D40633: [PCG] Poor shuffle lane tracking (PR35454 )

[Konstantin Belochapka via Phabricator via llvm-commits]

kbelochapka created this revision.

Fix allows for the following transformation to take place:  
BINARY-OPERATION( SHUFFLE(vector1, mask), SHUFFLE(vector2, mask)) -> SHUFFLE(  BINARY-OPERATION(vector1, vector2), mask)
in a case when BINARY-OPERATION instruction operands vector type is different from SHUFFLE instruction operands vector type. e.g. <4 x i32> and <16 x i8>, obviously the both data types need to have the same width.


https://reviews.llvm.org/D40633

Files:
  lib/Transforms/InstCombine/InstructionCombining.cpp
  test/Transforms/InstCombine/vec_shuffle.ll

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