[Bug hsa/81713] New: BIT_FIELD_REF produced by Brig FE do not pass new verification

["jamborm at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81713

            Bug ID: 81713
           Summary: BIT_FIELD_REF produced by Brig FE do not pass new
                    verification
           Product: gcc
           Version: 8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: hsa
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jamborm at gcc dot gnu.org
                CC: jamborm at gcc dot gnu.org, marxin at gcc dot gnu.org
  Target Milestone: ---

Running brig FE testsuite reveals new failures:

FAIL: brig.dg/test/gimple/packed.hsail (internal compiler error)
FAIL: brig.dg/test/gimple/packed.hsail (test for excess errors)
FAIL: brig.dg/test/gimple/vector.hsail (internal compiler error)
FAIL: brig.dg/test/gimple/vector.hsail (test for excess errors)

They started with r250659, which makes BIT_FIELD_REF operand checking
stricter and the IL generated by brig FE seems to run afoul of them
with the following error:

brig1: error: invalid position or size operand to BIT_FIELD_REF
BIT_FIELD_REF <mem_read.1, 32, 0>

Size and position operands of BIT_FIELD_REF must be compatible with
bitsizetype now.