[NFC] Port old precompute* tests to lit (#7867)

Author: kripken

test/lit/passes/precompute-propagate_all-features.wast

@@ -0,0 +1,32 @@
+;; NOTE: Assertions have been generated by update_lit_checks.py --all-items and should not be edited.
+;; NOTE: This test was ported using port_passes_tests_to_lit.py and could be cleaned up.
+
+;; RUN: foreach %s %t wasm-opt --precompute --coalesce-locals --vacuum -S -o - | filecheck %s
+
+(module
+ ;; CHECK:      (type $0 (func (param i32) (result i32)))
+
+ ;; CHECK:      (func $nested-br_if-value (param $0 i32) (result i32)
+ ;; CHECK-NEXT:  (loop $label$0
+ ;; CHECK-NEXT:   (br $label$0)
+ ;; CHECK-NEXT:  )
+ ;; CHECK-NEXT: )
+ (func $nested-br_if-value (param $var$0 i32) (result i32)
+  (local $1 i32)
+  (local $2 i32)
+  (loop $label$0 (result i32)
+   (drop
+    (i32.const 2)
+   )
+   (block (result i32)
+    (local.set $2
+     (i32.const 4)
+    )
+    (br_if $label$0 ;; precomputing this into a br must change the type
+     (i32.const 1)
+    )
+    (local.get $2)
+   )
+  )
+ )
+)