[wasm] Int64Lowering of FXXXConvertI64 instructions.

src/compiler/wasm-compiler.h

Index: src/compiler/wasm-compiler.h
diff --git a/src/compiler/wasm-compiler.h b/src/compiler/wasm-compiler.h
index 2e86b5600ec63d2becbe246fe120b58968efc9ac..0dd937bcfb76c2be0943e4b936362cd8d2d992b3 100644
--- a/src/compiler/wasm-compiler.h
+++ b/src/compiler/wasm-compiler.h
@@ -190,6 +190,14 @@ class WasmGraphBuilder {
   Node* BuildF64Floor(Node* input);
   Node* BuildF64Ceil(Node* input);
   Node* BuildF64NearestInt(Node* input);
+  Node* BuildConversionInstruction(
+      Node* input, ExternalReference ref,
+      MachineRepresentation parameter_representation,
+      const MachineType result_type);
+  Node* BuildF32SConvertI64(Node* input);
+  Node* BuildF32UConvertI64(Node* input);
+  Node* BuildF64SConvertI64(Node* input);
+  Node* BuildF64UConvertI64(Node* input);
 
   Node** Realloc(Node** buffer, size_t count) {
     Node** buf = Buffer(count);