[ConstraintElimination] UB reproducer for D145677

Reviewed By: fhahn Differential Revision: https://reviews.llvm.org/D145812
llvm · Mar 10, 2023 · 2cf632a · 2cf632a
1 parent 5c18444
commit 2cf632a
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/llvm/test/Transforms/ConstraintElimination/shl.ll b/llvm/test/Transforms/ConstraintElimination/shl.ll
@@ -1275,3 +1275,16 @@ entry:
   %shl.cmp = icmp uge i256 %shl.ub, 0
   ret i1 %shl.cmp
 }
+
+define i1 @shl_55() {
+; CHECK-LABEL: @shl_55(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[SHL_UB:%.*]] = shl nuw nsw i256 1, 55
+; CHECK-NEXT:    [[SHL_CMP:%.*]] = icmp uge i256 [[SHL_UB]], 1
+; CHECK-NEXT:    ret i1 true
+;
+entry:
+  %shl.ub = shl nuw nsw i256 1, 55
+  %shl.cmp = icmp uge i256 %shl.ub, 1
+  ret i1 %shl.cmp
+}