cranelift: simplify ineg(ineg(x)) to x (#6033)

2023-03-16 22:14:05 +00:00
parent 07136ae96d
commit dccc2d6269
2 changed files with 11 additions and 0 deletions
--- a/cranelift/filetests/filetests/egraph/algebraic.clif
+++ b/cranelift/filetests/filetests/egraph/algebraic.clif
@@ -224,6 +224,14 @@ block0(v0: i8):
    ; check: return v5
 }

+function %double_ineg(i32) -> i32 {
+block0(v0: i32):
+    v1 = ineg v0
+    v2 = ineg v1
+    return v2
+    ; check: return v0
+}
+
 function %or_and_y_with_not_y_i8(i8, i8) -> i8 {
 block0(v0: i8, v1: i8):
    v2 = band v0, v1