diff options
Diffstat (limited to 'gcc/lra-constraints.c')
| -rw-r--r-- | gcc/lra-constraints.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c index 0098a75..62947e3 100644 --- a/gcc/lra-constraints.c +++ b/gcc/lra-constraints.c @@ -4130,7 +4130,15 @@ curr_insn_transform (bool check_only_p) && (goal_alt[i] == NO_REGS || (simplify_subreg_regno (ira_class_hard_regs[goal_alt[i]][0], - GET_MODE (reg), byte, mode) >= 0))))) + GET_MODE (reg), byte, mode) >= 0))) + /* WORD_REGISTER_OPERATIONS targets require the register + to be reloaded when the outer mode is strictly + narrower than the inner mode. Note: It may be + necessary to always reload the inner mode here but it + requires further investigation. */ + || (GET_MODE_PRECISION (mode) + < GET_MODE_PRECISION (GET_MODE (reg)) + && WORD_REGISTER_OPERATIONS))) { if (type == OP_OUT) type = OP_INOUT; |