diff options
Diffstat (limited to 'gcc/config/vax')
| -rw-r--r-- | gcc/config/vax/vax.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/gcc/config/vax/vax.c b/gcc/config/vax/vax.c index 2274cce..07c499c 100644 --- a/gcc/config/vax/vax.c +++ b/gcc/config/vax/vax.c @@ -2042,12 +2042,14 @@ vax_expand_addsub_di_operands (rtx * operands, enum rtx_code code) } else { - /* If are adding the same value together, that's really a multiply by 2, - and that's just a left shift of 1. */ + /* If we are adding a value to itself, that's really a multiply by 2, + and that's just a left shift by 1. If subtracting, it's just 0. */ if (rtx_equal_p (operands[1], operands[2])) { - gcc_assert (code != MINUS); - emit_insn (gen_ashldi3 (operands[0], operands[1], const1_rtx)); + if (code == PLUS) + emit_insn (gen_ashldi3 (operands[0], operands[1], const1_rtx)); + else + emit_move_insn (operands[0], const0_rtx); return; } |