The two rules tables have to be updated because MAX_COMMON_ADDRESS has been bumped to 6 for handling 32-bit constant address space. Otherwise, we might have out of bounds access. Reported by Jan Vesely.
This does not match the current code. Is this a fixup for https://reviews.llvm.org/D47261?
afaik, MAX_COMMON_ADDRESS refers to address spaces shared between amdgcn and r600. r600 does not use CONST_32_BIT AS so it probably should not be in the table.