Cranelift: Collapse double extends into a single extend (#5772)

2023-02-13 14:43:17 -08:00
parent 91c8114f00
commit 6df3bbbe60
2 changed files with 26 additions and 0 deletions
--- a/cranelift/filetests/filetests/egraph/algebraic.clif
+++ b/cranelift/filetests/filetests/egraph/algebraic.clif
@@ -337,3 +337,23 @@ block0(v1: i32):

 ; check: v5 = iconst.i8 1
 ; check: return v5
+
+function %double_uextend(i16) -> i64 {
+block0(v1: i16):
+    v2 = uextend.i32 v1
+    v3 = uextend.i64 v2
+    return v3
+}
+
+; check: v4 = uextend.i64 v1
+; check: return v4
+
+function %double_sextend(i16) -> i64 {
+block0(v1: i16):
+    v2 = sextend.i32 v1
+    v3 = sextend.i64 v2
+    return v3
+}
+
+; check: v4 = sextend.i64 v1
+; check: return v4