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[0/4] Use new vector constant encoding for CONST_VECTOR

Message ID 874loainn7.fsf@linaro.org
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Series Use new vector constant encoding for CONST_VECTOR | expand

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Richard Sandiford Dec. 28, 2017, 8:49 p.m. UTC 
This series of patches converts CONST_VECTOR to use the same encoding
scheme as VECTOR_CST.  I'd originally being holding it back until the
vec_perm series had been processed, but that was probably a mistake.

The main difference from VECTOR_CST is that we still include all the
elements for fixed-length vectors, to help with code that operates
directly on XVEC and XVECEXP.  See the covering note of patch 2 for
more details.

Tested on aarch64-linux-gnu, x86_64-linux-gnu and powerpc64el-linux-gnu.
Also tested by comparing the before-and-after assembly output for at
least one target per CPU directory.  OK to install?

Thanks,
Richard

[FWIW, the vec_perm patches are the only ones holding up the rest of
the poly_int ones.]