Regression Failures after defining TARGET_VECTOR_MODE_SUPPORTED_P

[Ina Pandit <Ina.Pandit@xxxxxxxxxxxxxxx>]

Hi,

We have been implementing GCC port for a new target.

I am getting the following regression failures,
============================================================================
FAIL: gcc.dg/tree-ssa/gen-vect-11a.c scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/tree-ssa/gen-vect-2.c scan-tree-dump-times vect "vectorized 1 loops" 1
FAIL: gcc.dg/tree-ssa/gen-vect-25.c scan-tree-dump-times vect "vectorized 2 loops" 1
============================================================================

For this target, the mode V2HI is supported. Hence the macro 'TARGET_VECTOR_MODE_SUPPORTED_P' has been defined in the following manner, 

===================================================================
#undef TARGET_VECTOR_MODE_SUPPORTED_P
#define TARGET_VECTOR_MODE_SUPPORTED_P xxx_vector_mode_supported_p

bool
xxx_vector_mode_supported_p (enum machine_mode mode)
{
  return (mode == V2HImode) ;
}
===================================================================

However, it is observed that these test cases pass if this macro is NOT defined.
Am I missing something? Do I need to define something else?

Thanks in advance.

Regards,
Ina Pandit