Backports fixes for many ICEs that occurred when using the vector .array
property in both CTFE and code generation passes.

Fixes https://gcc.gnu.org/PR88957

Reviewed-on: https://github.com/dlang/dmd/pull/9438

gcc/d/ChangeLog:

2019-03-13  Iain Buclaw  <ibuclaw@gdcproject.org>

	PR d/88957
	* expr.cc (ExprVisitor::visit(VectorArrayExp)): New override.

gcc/testsuite/ChangeLog:

2019-03-13  Iain Buclaw  <ibuclaw@gdcproject.org>

	PR d/88957
	* gdc.dg/pr88957.d: New test.
	* gdc.dg/simd.d: Add new vector tests.

From-SVN: r269627