diff options
Diffstat (limited to 'gcc/expr.c')
| -rw-r--r-- | gcc/expr.c | 45 |
1 files changed, 44 insertions, 1 deletions
@@ -2786,12 +2786,55 @@ emit_move_insn_1 (x, y) /* Don't split destination if it is a stack push. */ int stack = push_operand (x, GET_MODE (x)); + /* In case we output to the stack, but the size is smaller machine can + push exactly, we need to use move instructions. */ + if (stack + && PUSH_ROUNDING (GET_MODE_SIZE (submode)) != GET_MODE_SIZE (submode)) + { + rtx temp; + int offset1, offset2; + + /* Do not use anti_adjust_stack, since we don't want to update + stack_pointer_delta. */ + temp = expand_binop (Pmode, +#ifdef STACK_GROWS_DOWNWARD + sub_optab, +#else + add_optab, +#endif + stack_pointer_rtx, + GEN_INT + (PUSH_ROUNDING (GET_MODE_SIZE (GET_MODE (x)))), + stack_pointer_rtx, + 0, + OPTAB_LIB_WIDEN); + if (temp != stack_pointer_rtx) + emit_move_insn (stack_pointer_rtx, temp); +#ifdef STACK_GROWS_DOWNWARD + offset1 = 0; + offset2 = GET_MODE_SIZE (submode); +#else + offset1 = -PUSH_ROUNDING (GET_MODE_SIZE (GET_MODE (x))); + offset2 = (-PUSH_ROUNDING (GET_MODE_SIZE (GET_MODE (x))) + + GET_MODE_SIZE (submode)); +#endif + emit_move_insn (change_address (x, submode, + gen_rtx_PLUS (Pmode, + stack_pointer_rtx, + GEN_INT (offset1))), + gen_realpart (submode, y)); + emit_move_insn (change_address (x, submode, + gen_rtx_PLUS (Pmode, + stack_pointer_rtx, + GEN_INT (offset2))), + gen_imagpart (submode, y)); + } /* If this is a stack, push the highpart first, so it will be in the argument order. In that case, change_address is used only to convert the mode, not to change the address. */ - if (stack) + else if (stack) { /* Note that the real part always precedes the imag part in memory regardless of machine's endianness. */ |