e657c84fa1
We previously used splats instead of v128.const to materialize vector constants because V8 did not support v128.const. Now that V8 supports v128.const, we can use v128.const instead. Although this increases code size, it should also increase performance (or at least require fewer engine-side optimizations), so it is an appropriate change to make. Differential Revision: https://reviews.llvm.org/D100716