Detect undefined liveins.

2021-05-12 01:06:27 -07:00
parent 37fa3ec763
commit 1f9258bea5
2 changed files with 17 additions and 2 deletions
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -981,6 +981,8 @@ pub enum RegAllocError {
    /// Invalid branch: operand count does not match sum of block
    /// params of successor blocks.
    Branch(Inst),
+    /// A VReg is live-in on entry; this is not allowed.
+    EntryLivein,
 }

 impl std::fmt::Display for RegAllocError {