Hi, convert_memory_address_addr_space has a special PLUS/MULT case for POINTERS_EXTEND_UNSIGNED < 0. It turns out that it is also needed for all Pmode != ptr_mode cases. OK for trunk?
Thanks. H.J. --- 2011-06-11 H.J. Lu <hongjiu...@intel.com> PR middle-end/47727 * explow.c (convert_memory_address_addr_space): Permute the conversion and addition if one operand is a constant. diff --git a/gcc/explow.c b/gcc/explow.c index 7387dad..b343bf8 100644 --- a/gcc/explow.c +++ b/gcc/explow.c @@ -383,18 +383,13 @@ convert_memory_address_addr_space (enum machine_mode to_mode ATTRIBUTE_UNUSED, case PLUS: case MULT: - /* For addition we can safely permute the conversion and addition - operation if one operand is a constant and converting the constant - does not change it or if one operand is a constant and we are - using a ptr_extend instruction (POINTERS_EXTEND_UNSIGNED < 0). - We can always safely permute them if we are making the address - narrower. */ + /* For addition we safely permute the conversion and addition + operation if one operand is a constant since we can't generate + new instructions. We can always safely permute them if we are + making the address narrower. */ if (GET_MODE_SIZE (to_mode) < GET_MODE_SIZE (from_mode) || (GET_CODE (x) == PLUS - && CONST_INT_P (XEXP (x, 1)) - && (XEXP (x, 1) == convert_memory_address_addr_space - (to_mode, XEXP (x, 1), as) - || POINTERS_EXTEND_UNSIGNED < 0))) + && CONST_INT_P (XEXP (x, 1)))) return gen_rtx_fmt_ee (GET_CODE (x), to_mode, convert_memory_address_addr_space (to_mode, XEXP (x, 0), as),