Match: Support form 11 for the unsigned scalar .SAT_SUB

We missed one match pattern for the unsigned scalar .SAT_SUB,  aka
form 11.

Form 11:
  #define SAT_SUB_U_11(T) \
  T sat_sub_u_11_##T (T x, T y) \
  { \
    T ret; \
    bool overflow = __builtin_sub_overflow (x, y, &ret); \
    return overflow ? 0 : ret; \
  }

Thus,  add above form 11 to the match pattern gimple_unsigned_integer_sat_sub.

The below test suites are passed for this patch:
1. The rv64gcv fully regression test with newlib.
2. The rv64gcv build with glibc.
3. The x86 bootstrap test.
4. The x86 fully regression test.

gcc/ChangeLog:

	* match.pd: Add form 11 match pattern for .SAT_SUB.

Signed-off-by: Pan Li <pan2.li@intel.com>

0 files changed, 0 insertions, 0 deletions