Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
simplify.c | 4 ++++
validation/optim/simplify-neg-sub.c | 1 -
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/simplify.c b/simplify.c
index 85c8d1d1df1c..fd486172e6e8 100644
--- a/simplify.c
+++ b/simplify.c
@@ -1478,6 +1478,10 @@ static int simplify_unop(struct instruction *insn)
return replace_pseudo(insn, &insn->src1, src);
case OP_NEG: // -(-x) --> x
return replace_with_pseudo(insn, def->src);
+ case OP_SUB: // -(x - y) --> y - x
+ insn->opcode = OP_SUB;
+ use_pseudo(insn, def->src1, &insn->src2);
+ return replace_pseudo(insn, &insn->src1, def->src2);
}
break;
default:
diff --git a/validation/optim/simplify-neg-sub.c b/validation/optim/simplify-neg-sub.c
index b73c9e5e66b4..9a824f09c1db 100644
--- a/validation/optim/simplify-neg-sub.c
+++ b/validation/optim/simplify-neg-sub.c
@@ -3,7 +3,6 @@ int foo(int x, int y) { return -(x - y) == (y - x); }
/*
* check-name: simplify-neg-sub
* check-command: test-linearize -Wno-decl $file
- * check-known-to-fail
*
* check-output-ignore
* check-output-contains: ret\\..*\\$1
--
2.28.0
