diff options
Diffstat (limited to 'simplify.c')
| -rw-r--r-- | simplify.c | 15 |
1 files changed, 15 insertions, 0 deletions
@@ -1311,6 +1311,21 @@ static int simplify_compare_constant(struct instruction *insn, long long value) break; } break; + case OP_OR: + if (!constant(def->src2)) + break; + bits = def->src2->value; + switch (insn->opcode) { + case OP_SET_EQ: + if ((value & bits) != bits) + return replace_with_value(insn, 0); + break; + case OP_SET_NE: + if ((value & bits) != bits) + return replace_with_value(insn, 1); + break; + } + break; case OP_SEXT: // sext(x) cmp C --> x cmp trunc(C) osize = def->orig_type->bit_size; if (is_signed_constant(value, osize, size)) { |