https://gcc.gnu.org/bugzilla/show_bug.cgi?id=72802
--- Comment #5 from Alan Modra <amodra at gcc dot gnu.org> --- Author: amodra Date: Mon Aug 8 09:05:16 2016 New Revision: 239233 URL: https://gcc.gnu.org/viewcvs?rev=239233&root=gcc&view=rev Log: [RS6000] PR72802 part 1, fix constraints for lxssp/stxssp We can't use "o" constraint for lsxxp/stxssp since those insns have a DS-form offset field, ie. the bottom two bits of the offset must be 0. So use "wY" instead, but that leads to finding another problem. mem_operand_gpr is only suitable for gpr loads/stores since it does not enforce multiple-of-4 offsets when -m32. So "wY" can't use mem_operand_gpr, and the vsx tests in mem_operand_gpr are bogus. I've deleted offsettable_mem_14bit_operand because it wasn't used anywhere but in the wY constraint. Note also that the new wY constraint doesn't use memory_operand because that is redundant in a constraint, having already been tested in the predicate. PR target/72802 * config/rs6000/rs6000.c (mem_operand_gpr): Remove vsx dform test. (mem_operand_ds_form): New predicate. * config/rs6000/rs6000-protos.h (mem_operand_ds_form): Declare. * config/rs6000/constraints.md (wY): Use mem_operand_df_form. * config/rs6000/predicates.md (offsettable_mem_14bit_operand): Delete. * config/rs6000/rs6000.md (f32_lm2, f32_sm2): Use wY for SF. (extendsfdf2_fpr): Replace o constraint with wY. Modified: trunk/gcc/ChangeLog trunk/gcc/config/rs6000/constraints.md trunk/gcc/config/rs6000/predicates.md trunk/gcc/config/rs6000/rs6000-protos.h trunk/gcc/config/rs6000/rs6000.c trunk/gcc/config/rs6000/rs6000.md
