Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
simplify.c | 4 ++++
validation/optim/simplify-not-neg.c | 1 -
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/simplify.c b/simplify.c
index 1b6e1cc2313b..6588f8af2820 100644
--- a/simplify.c
+++ b/simplify.c
@@ -1470,6 +1470,10 @@ static int simplify_unop(struct instruction *insn)
src = eval_unop(OP_NOT, insn->size, def->src2);
use_pseudo(insn, def->src1, &insn->src2);
return replace_pseudo(insn, &insn->src1, src);
+ case OP_NEG:
+ insn->opcode = OP_SUB; // ~(-x) --> x - 1
+ insn->src2 = value_pseudo(1);
+ return replace_pseudo(insn, &insn->src1, def->src);
case OP_NOT: // ~(~x) --> x
return replace_with_pseudo(insn, def->src);
case OP_SUB:
diff --git a/validation/optim/simplify-not-neg.c b/validation/optim/simplify-not-neg.c
index b9675ea62049..3fd8400d7bd4 100644
--- a/validation/optim/simplify-not-neg.c
+++ b/validation/optim/simplify-not-neg.c
@@ -3,7 +3,6 @@ int foo(int x) { return ~(-x) == (x - 1); }
/*
* check-name: simplify-not-neg
* check-command: test-linearize -Wno-decl $file
- * check-known-to-fail
*
* check-output-ignore
* check-output-contains: ret\\..*\\$1
--
2.28.0
