diff options
Diffstat (limited to 'simplify.c')
| -rw-r--r-- | simplify.c | 13 |
1 files changed, 12 insertions, 1 deletions
@@ -2068,7 +2068,7 @@ static int simplify_memop(struct instruction *insn) static int simplify_cast(struct instruction *insn) { unsigned long long mask; - struct instruction *def; + struct instruction *def, *def2; pseudo_t src = insn->src; pseudo_t val; int osize; @@ -2165,6 +2165,17 @@ static int simplify_cast(struct instruction *insn) case OP_TRUNC: insn->orig_type = def->orig_type; return replace_pseudo(insn, &insn->src1, def->src); + case OP_SEXT: + if (size != def->orig_type->bit_size) + break; + if (DEF_OPCODE(def2, def->src) != OP_LSR) + break; + if (def2->src2 != value_pseudo(size - def->size)) + break; + // SEXT(TRUNC(LSR(x, N))) --> ASR(x, N) + insn->opcode = OP_ASR; + insn->src2 = def2->src2; + return replace_pseudo(insn, &insn->src1, def2->src1); case OP_ZEXT: if (size != def->orig_type->bit_size) break; |