Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
simplify.c | 5 +++++
validation/optim/simplify-same-sub-addl.c | 1 -
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/simplify.c b/simplify.c
index 68ee6ed015c1..65fca35099a6 100644
--- a/simplify.c
+++ b/simplify.c
@@ -1369,6 +1369,11 @@ static int simplify_add(struct instruction *insn)
switch_pseudo(insn, &insn->src1, insn, &insn->src2);
insn->opcode = OP_SUB;
return replace_pseudo(insn, &insn->src2, def->src);
+
+ case OP_SUB:
+ if (def->src2 == src2) // (x - y) + y --> x
+ return replace_with_pseudo(insn, def->src1);
+ break;
}
switch (DEF_OPCODE(def, src2)) {
diff --git a/validation/optim/simplify-same-sub-addl.c b/validation/optim/simplify-same-sub-addl.c
index 78f217399e50..56b6fcc24e9d 100644
--- a/validation/optim/simplify-same-sub-addl.c
+++ b/validation/optim/simplify-same-sub-addl.c
@@ -3,7 +3,6 @@ int foo(int x, int y) { return (x - y) + y; }
/*
* check-name: simplify-same-sub-addl
* check-command: test-linearize -Wno-decl $file
- * check-known-to-fail
*
* check-output-ignore
* check-output-contains: ret\\..*%arg1
--
2.28.0
