1 files changed, 68 insertions, 0 deletions
diff --git a/test/lit/passes/inlining-unreachable.wast b/test/lit/passes/inlining-unreachable.wast
new file mode 100644
index 000000000..4cec297e4
--- /dev/null
+++ b/test/lit/passes/inlining-unreachable.wast
@@ -0,0 +1,68 @@
+;; NOTE: Assertions have been generated by update_lit_checks.py --all-items and should not be edited.
+
+;; RUN: foreach %s %t wasm-opt --inlining -S -o - | filecheck %s
+
+;; Test that we inline functions with unreachable bodies. This is important to
+;; propagate the trap to the caller (where it might lead to DCE).
+
+(module
+  (func $trap
+    (unreachable)
+  )
+  ;; CHECK:      (type $none_=>_none (func))
+
+  ;; CHECK:      (type $none_=>_i32 (func (result i32)))
+
+  ;; CHECK:      (func $call-trap
+  ;; CHECK-NEXT:  (block $__inlined_func$trap
+  ;; CHECK-NEXT:   (unreachable)
+  ;; CHECK-NEXT:   (br $__inlined_func$trap)
+  ;; CHECK-NEXT:  )
+  ;; CHECK-NEXT: )
+  (func $call-trap
+    ;; In this case the call had type none, but the inlined code is unreachable,
+    ;; so we'll add a br to the new block to keep the type as none (the br is
+    ;; not actually reached, and other opts will remove it).
+    (call $trap)
+  )
+
+  (func $trap-result (result i32)
+    ;; As above, but now there is a declared result.
+    (unreachable)
+  )
+
+  ;; CHECK:      (func $call-trap-result (result i32)
+  ;; CHECK-NEXT:  (block $__inlined_func$trap-result (result i32)
+  ;; CHECK-NEXT:   (unreachable)
+  ;; CHECK-NEXT:  )
+  ;; CHECK-NEXT: )
+  (func $call-trap-result (result i32)
+    (call $trap-result)
+  )
+
+  (func $contents-then-trap
+    ;; Add some contents in addition to the trap.
+    (nop)
+    (drop
+      (i32.const 1337)
+    )
+    (nop)
+    (unreachable)
+  )
+  ;; CHECK:      (func $call-contents-then-trap
+  ;; CHECK-NEXT:  (block $__inlined_func$contents-then-trap
+  ;; CHECK-NEXT:   (block
+  ;; CHECK-NEXT:    (nop)
+  ;; CHECK-NEXT:    (drop
+  ;; CHECK-NEXT:     (i32.const 1337)
+  ;; CHECK-NEXT:    )
+  ;; CHECK-NEXT:    (nop)
+  ;; CHECK-NEXT:    (unreachable)
+  ;; CHECK-NEXT:   )
+  ;; CHECK-NEXT:   (br $__inlined_func$contents-then-trap)
+  ;; CHECK-NEXT:  )
+  ;; CHECK-NEXT: )
+  (func $call-contents-then-trap
+    (call $contents-then-trap)
+  )
+)