> The problem occurs when accessing local array element. For example, > # VUSE <.MEM_27> > k_8 = parent[k_29]; > > GCC calculates the address in three steps: > 1) addr is calculated as "r105 + (-2064)". > 2) offset is calculated as "r165*4". > 3) calls offset_address to combine the address into "r105+ r165*4 + > (-2064)". > > Since ADDR is valid and there is no call to memory_address_addr_space in > offset_address, the invalid address expression has no chance to go through > target dependent legitimization function.
But offset_address calls change_address_1 with validate set to 1 so during RTL expansion memory_address_addr_space should be invoked on the invalid address. > Even there is a chance, the > current implementation of memory_address_addr_space prevents the scaled > address expression from being generated because of below code: > if (! cse_not_expected && !REG_P (x)) > x = break_out_memory_refs (x); Where are the memory references in the above address? -- Eric Botcazou
