2 files changed, 6 insertions, 1 deletions
diff --git a/simplify.c b/simplify.c
index 51c930fa..8d1ffb13 100644
--- a/simplify.c
+++ b/simplify.c
@@ -1079,6 +1079,12 @@ static int simplify_cast(struct instruction *insn)
 		}
 		break;
 	case OP_ZEXT:
+		switch (insn->opcode) {
+		case OP_ZEXT:
+			insn->orig_type = def->orig_type;
+			return replace_pseudo(insn, &insn->src, def->src);
+		}
+		/* fall through */
 	case OP_SEXT:
 		switch (insn->opcode) {
 		case OP_TRUNC:
diff --git a/validation/optim/zext-zext.c b/validation/optim/zext-zext.c
index b88a6cca..986d2242 100644
--- a/validation/optim/zext-zext.c
+++ b/validation/optim/zext-zext.c
@@ -6,7 +6,6 @@ int foo(unsigned char offset)
 /*
  * check-name: zext-zext
  * check-command: test-linearize -Wno-decl $file
- * check-known-to-fail
  *
  * check-output-ignore
  * check-output-excludes: sext\\.