Backport a fix for the simpler bug in lossless_cast (#8264)

Fix the simpler bug in lossless_cast The full fix to lossless_cast is too complicated to backport
halide · Jun 7, 2024 · 54a7f1d · 54a7f1d
1 parent 5254117
commit 54a7f1d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/IROperator.cpp b/src/IROperator.cpp
@@ -502,7 +502,7 @@ Expr lossless_cast(Type t, Expr e) {
             Expr a = lossless_cast(t.narrow(), sub->a);
             Expr b = lossless_cast(t.narrow(), sub->b);
             if (a.defined() && b.defined()) {
-                return cast(t, a) + cast(t, b);
+                return cast(t, a) - cast(t, b);
             } else {
                 return Expr();
             }