fix codegen gcc

Author: Luv-Ray

compiler/rustc_codegen_gcc/src/builder.rs

@@ -509,6 +509,7 @@ impl<'a, 'gcc, 'tcx> Deref for Builder<'a, 'gcc, 'tcx> {
 
 impl<'gcc, 'tcx> BackendTypes for Builder<'_, 'gcc, 'tcx> {
     type Value = <CodegenCx<'gcc, 'tcx> as BackendTypes>::Value;
+    type Metadata = <CodegenCx<'gcc, 'tcx> as BackendTypes>::Metadata;
     type Function = <CodegenCx<'gcc, 'tcx> as BackendTypes>::Function;
     type BasicBlock = <CodegenCx<'gcc, 'tcx> as BackendTypes>::BasicBlock;
     type Type = <CodegenCx<'gcc, 'tcx> as BackendTypes>::Type;

compiler/rustc_codegen_gcc/src/context.rs

@@ -415,6 +415,7 @@ impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
 
 impl<'gcc, 'tcx> BackendTypes for CodegenCx<'gcc, 'tcx> {
     type Value = RValue<'gcc>;
+    type Metadata = RValue<'gcc>;
     type Function = RValue<'gcc>;
 
     type BasicBlock = Block<'gcc>;