PR testsuite/52641
        * c-c++-common/simulate-thread/bitfields-2.c: Run test only for
        target { ! int16 }.
        * gcc.dg/tree-ssa/pr54245.c: Do slsr scan only for target { ! int16 }.
        * gcc.dg/tree-ssa/slsr-1.c: Adjust multiplicators to scan for for
        target { int16 }.  Restrict existing tests to target { int32 }
        where appropriate.
        * gcc.dg/tree-ssa/slsr-2.c, gcc.dg/tree-ssa/slsr-27.c: Likewise.
        * gcc.dg/tree-ssa/slsr-28.c, gcc.dg/tree-ssa/slsr-29.c: Likewise.
        * gcc.dg/tree-ssa/slsr-3.c, gcc.dg/tree-ssa/ssa-ccp-23.c: Likewise.
        * lib/target-supports.exp (check_effective_target_int32): New proc.

From-SVN: r201743