Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
simplify.c | 7 +++++++
validation/optim/simplify-neg-add-cte.c | 1 -
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/simplify.c b/simplify.c
index 2750a90512b8..85c8d1d1df1c 100644
--- a/simplify.c
+++ b/simplify.c
@@ -1469,6 +1469,13 @@ static int simplify_unop(struct instruction *insn)
break;
case OP_NEG:
switch (DEF_OPCODE(def, src)) {
+ case OP_ADD:
+ if (!constant(def->src2))
+ break;
+ insn->opcode = OP_SUB; // -(x + C) --> (-C - x)
+ src = eval_unop(OP_NEG, insn->size, def->src2);
+ use_pseudo(insn, def->src1, &insn->src2);
+ return replace_pseudo(insn, &insn->src1, src);
case OP_NEG: // -(-x) --> x
return replace_with_pseudo(insn, def->src);
}
diff --git a/validation/optim/simplify-neg-add-cte.c b/validation/optim/simplify-neg-add-cte.c
index 4e425096a489..a02c474fa25a 100644
--- a/validation/optim/simplify-neg-add-cte.c
+++ b/validation/optim/simplify-neg-add-cte.c
@@ -5,7 +5,6 @@ int foo(int x) { return -(x + C) == (-3 - x); }
/*
* check-name: simplify-neg-add-cte
* check-command: test-linearize -Wno-decl $file
- * check-known-to-fail
*
* check-output-ignore
* check-output-contains: ret\\..*\\$1
--
2.28.0
