- ir_entity *irn_ent = get_ia32_frame_ent(irn);
- ir_entity *lea_ent = get_ia32_frame_ent(lea);
- int ret_val = 0;
- int is_noreg_base = be_is_NoReg(cg, base);
- int is_noreg_index = be_is_NoReg(cg, index);
- ia32_am_flavour_t am_flav = get_ia32_am_flavour(lea);
-
- /* If the Add and the LEA both have a different frame entity set: keep */
- if (irn_ent && lea_ent && (irn_ent != lea_ent))
- return IA32_LEA_ATTR_NONE;
- else if (! irn_ent && lea_ent)
- ret_val |= IA32_LEA_ATTR_FENT;
-
- /* If the Add and the LEA both have already an address mode symconst: keep */
- if (have_am_sc && get_ia32_am_sc(lea))
- return IA32_LEA_ATTR_NONE;
- else if (get_ia32_am_sc(lea))
- ret_val |= IA32_LEA_ATTR_AMSC;
-
- /* Check the different base-index combinations */
-
- if (! is_noreg_base && ! is_noreg_index) {
- /* Assimilate if base is the lea and the LEA is just a Base + Offset calculation */
- if ((base == lea) && ! (am_flav & ia32_I ? 1 : 0)) {
- if (am_flav & ia32_O)
- ret_val |= IA32_LEA_ATTR_OFFS;
-
- ret_val |= IA32_LEA_ATTR_BASE;
- }
- else
- return IA32_LEA_ATTR_NONE;
- }
- else if (! is_noreg_base && is_noreg_index) {
- /* Base is set but index not */
- if (base == lea) {
- /* Base points to LEA: assimilate everything */
- if (am_flav & ia32_O)
- ret_val |= IA32_LEA_ATTR_OFFS;
- if (am_flav & ia32_S)
- ret_val |= IA32_LEA_ATTR_SCALE;
- if (am_flav & ia32_I)
- ret_val |= IA32_LEA_ATTR_INDEX;
-
- ret_val |= IA32_LEA_ATTR_BASE;
- }
- else if (am_flav & ia32_B ? 0 : 1) {
- /* Base is not the LEA but the LEA is an index only calculation: assimilate */
- if (am_flav & ia32_O)
- ret_val |= IA32_LEA_ATTR_OFFS;
- if (am_flav & ia32_S)
- ret_val |= IA32_LEA_ATTR_SCALE;
-
- ret_val |= IA32_LEA_ATTR_INDEX;
- }
- else
- return IA32_LEA_ATTR_NONE;
- }
- else if (is_noreg_base && ! is_noreg_index) {
- /* Index is set but not base */
- if (index == lea) {
- /* Index points to LEA: assimilate everything */
- if (am_flav & ia32_O)
- ret_val |= IA32_LEA_ATTR_OFFS;
- if (am_flav & ia32_S)
- ret_val |= IA32_LEA_ATTR_SCALE;
- if (am_flav & ia32_B)
- ret_val |= IA32_LEA_ATTR_BASE;
-
- ret_val |= IA32_LEA_ATTR_INDEX;
- }
- else if (am_flav & ia32_I ? 0 : 1) {
- /* Index is not the LEA but the LEA is a base only calculation: assimilate */
- if (am_flav & ia32_O)
- ret_val |= IA32_LEA_ATTR_OFFS;
- if (am_flav & ia32_S)
- ret_val |= IA32_LEA_ATTR_SCALE;
-
- ret_val |= IA32_LEA_ATTR_BASE;
- }
- else
- return IA32_LEA_ATTR_NONE;
- }
- else {
- assert(0 && "There must have been set base or index");