[NewGVN][NFC] Add test for x + poison -> poison

2021-12-30 12:08:07 +00:00 · 2021-12-30 12:08:07 +00:00 · 72ea6fbc15
parent 64af9f61c3
commit 72ea6fbc15
1 changed files with 8 additions and 0 deletions
--- a/llvm/test/Transforms/NewGVN/basic.ll
+++ b/llvm/test/Transforms/NewGVN/basic.ll
@ -33,3 +33,11 @@ define i64 @simplifyselect(i64 %x, i64 %y, i1 %c1, i1 %c2, i1 %zzz) {
  %r = add i64 %r1, %r2_eq2
  ret i64 %r
 }
+
+define i8 @simplify_add_poison(i8 %x) {
+; CHECK-LABEL: @simplify_add_poison(
+; CHECK-NEXT:    ret i8 poison
+;
+  %r = add i8 poison, %x
+  ret i8 %r
+}