Change Details

Now, when llc encounters the case that contains a lot of extract_vector_elt and a BUILD_VECTOR, it will replace these to vector_shuffle to decrease the size of code, the actions are done in createBuildVecShuffle in DAGCombiner.cpp, but now the code cannot handle the case that the size of source vector reg is more than twice the dest size.

Now, when llc encounters the case that contains a lot of extract_vector_elt and a BUILD_VECTOR, it will replace these to vector_shuffle to decrease the size of code, the actions are done in createBuildVecShuffle in DAGCombiner.cpp, but now the code cannot handle the case that the size of source vector reg is more than twice the dest size.

Now, when llc encounters the case that contains a lot of extract_vector_elt extract_vector_elt and a BUILD_VECTOR, it will replace these to vector_shuffle to decrease the vector_shuffle to decrease the size of code, the actions are done in createBuildVecShuffle in DAGCombiner.cpp, createBuildVecShuffle in DAGCombiner.cpp, but now the code cannot handle the case that the size of source vector reg the case that the size of source vector reg is more than twice the dest size.