Implement JumpThreading pass.

1 files changed, 45 insertions, 0 deletions

diff --git a/tests/mir-opt/jump_threading.duplicate_chain.JumpThreading.panic-unwind.diff b/tests/mir-opt/jump_threading.duplicate_chain.JumpThreading.panic-unwind.diff
new file mode 100644
index 00000000000..adcedfb3667
--- /dev/null
+++ b/tests/mir-opt/jump_threading.duplicate_chain.JumpThreading.panic-unwind.diff
@@ -0,0 +1,45 @@
+- // MIR for `duplicate_chain` before JumpThreading
++ // MIR for `duplicate_chain` after JumpThreading
+  
+  fn duplicate_chain(_1: bool) -> u8 {
+      let mut _0: u8;
+      let mut _2: u8;
+      let mut _3: i32;
+      let mut _4: i32;
+  
+      bb0: {
+          switchInt(_1) -> [1: bb1, otherwise: bb2];
+      }
+  
+      bb1: {
+          _2 = const 5_u8;
+          goto -> bb3;
+      }
+  
+      bb2: {
+          _2 = const 5_u8;
+          goto -> bb3;
+      }
+  
+      bb3: {
+          _3 = const 13_i32;
+          goto -> bb4;
+      }
+  
+      bb4: {
+          _4 = const 15_i32;
+-         switchInt(_2) -> [5: bb5, otherwise: bb6];
++         goto -> bb5;
+      }
+  
+      bb5: {
+          _0 = const 7_u8;
+          return;
+      }
+  
+      bb6: {
+          _0 = const 9_u8;
+          return;
+      }
+  }
+