[wasm] Trim graph before scheduling.

src/compiler/instruction-selector.h

Index: src/compiler/instruction-selector.h
diff --git a/src/compiler/instruction-selector.h b/src/compiler/instruction-selector.h
index dfb80f458a95be5244b34b11b8b57876e0b46fdf..285aeff2a6af3c43cb2ce6589c1a6073f82d453f 100644
--- a/src/compiler/instruction-selector.h
+++ b/src/compiler/instruction-selector.h
@@ -347,6 +347,8 @@ class V8_EXPORT_PRIVATE InstructionSelector final {
   }
   bool instruction_selection_failed() { return instruction_selection_failed_; }
 
+  void MarkPairProjectionsAsWord32(Node* node);
+
   // ===========================================================================
 
   Zone* const zone_;