2 files changed, 2 insertions, 1 deletions
diff --git a/simplify.c b/simplify.c
index be8d461e..e399ad87 100644
--- a/simplify.c
+++ b/simplify.c
@@ -1196,11 +1196,13 @@ static int simplify_cast(struct instruction *insn)
 				break;
 			/* fall through */
 		case OP_ZEXT:
+		case OP_TRUNC:
 			// simplify:
 			//	setcc.n	%t <- %a, %b
 			//	zext.m	%r <- (n) %t
 			// into:
 			//	setcc.m	%r <- %a, %b
+			// and same for s/zext/trunc/
 			insn->opcode = def->opcode;
 			use_pseudo(insn, def->src2, &insn->src2);
 			return replace_pseudo(insn, &insn->src1, def->src1);
diff --git a/validation/optim/setne0-trunc.c b/validation/optim/setne0-trunc.c
index 62131410..6c5494ec 100644
--- a/validation/optim/setne0-trunc.c
+++ b/validation/optim/setne0-trunc.c
@@ -3,7 +3,6 @@ char foo(int a) { return a != 0; }
 /*
  * check-name: setne0-trunc
  * check-command: test-linearize -m64 -Wno-decl $file
- * check-known-to-fail
  *
  * check-output-ignore
  * check-output-excludes: trunc\\.