Some simplifications reduce to transforming a binop into an unop.
Add an helper for making this change easier and more readable.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
simplify.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/simplify.c b/simplify.c
index 4c6569eba036..3cac124f7d9f 100644
--- a/simplify.c
+++ b/simplify.c
@@ -470,6 +470,20 @@ static inline int replace_with_value(struct instruction *insn, long long val)
return replace_with_pseudo(insn, value_pseudo(val));
}
+///
+// replace a binop with an unop
+// @insn: the instruction to be replaced
+// @op: the instruction's new opcode
+// @src: the instruction's new operand
+// @return: REPEAT_CSE
+static inline int replace_with_unop(struct instruction *insn, int op, pseudo_t src)
+{
+ insn->opcode = op;
+ replace_pseudo(insn, &insn->src1, src);
+ remove_usage(insn->src2, &insn->src2);
+ return REPEAT_CSE;
+}
+
static inline int def_opcode(pseudo_t p)
{
if (p->type != PSEUDO_REG)
--
2.28.0
