Revert "gallivm/ssbo: mask offset with exec_mask instead of building the 'if'"
Revert "gallivm/ssbo: mask offset with exec_mask instead of building the 'if'"
mem_access_base_pointer loads memory (the descriptor) and therefore
needs to be guarded. Fixes
dEQP-VK.spirv_assembly.instruction.terminate_invocation.terminate.no_null_pointer_load.
Fixes: fc8a83c ("gallivm/ssbo: mask offset with exec_mask instead of building the 'if'")