For this code:
bb122:
  %tmp124 = ptrtoint %struct.TypHeader* %hdR to bool
  %i.3.in.in = select bool %tmp124, %struct.TypHeader* %hdR, %struct.TypHeader* %hdL
  %hdR_addr.0 = select bool %tmp124, %struct.TypHeader* %hdL, %struct.TypHeader*
%hdR

llc is generating:
.BB1_3: #bb122
        movl %eax, %ebx
        # TRUNCATE movb %bl, %bl
        testb %bl, %bl
        movl %eax, %edi
        cmovne %esi, %edi
        testb %bl, %bl
        cmovne %eax, %esi

It looks like the recent DAGCombiner changes missed a case for the select
instruction.

Test cases will be attached.