* configure.ac: Add Visium support.
	* configure: Regenerate.
libgcc/
	* config.host: Add Visium support.
	* config/visium: New directory.
gcc/
	* config.gcc: Add Visium support.
	* configure.ac: Likewise.
	* configure: Regenerate.
	* doc/extend.texi (interrupt attribute): Add Visium.
	* doc/invoke.texi: Document Visium options.
	* doc/install.texi: Document Visium target.
	* doc/md.texi: Document Visium constraints.
	* common/config/visium: New directory.
	* config/visium: Likewise.
gcc/testsuite/
	* lib/target-supports.exp (check_profiling_available): Return 0 for
	Visium.
	(check_effective_target_tls_runtime): Likewise.
	(check_effective_target_logical_op_short_circuit): Return 1 for Visium.
	* gcc.dg/20020312-2.c: Adjust for Visium.
	* gcc.dg/tls/thr-cse-1.c: Likewise
	* gcc.dg/tree-ssa/20040204-1.c: Likewise
	* gcc.dg/tree-ssa/loop-1.c: Likewise.
	* gcc.dg/weak/typeof-2.c: Likewise.

From-SVN: r219219