use TypingEnv when no infcx is available

the behavior of the type system not only depends on the current
assumptions, but also the currentnphase of the compiler. This is
mostly necessary as we need to decide whether and how to reveal
opaque types. We track this via the `TypingMode`.

compiler/rustc_codegen_gcc/src/int.rs

@@ -5,7 +5,7 @@
 use gccjit::{BinaryOp, ComparisonOp, FunctionType, Location, RValue, ToRValue, Type, UnaryOp};
 use rustc_codegen_ssa::common::{IntPredicate, TypeKind};
 use rustc_codegen_ssa::traits::{BackendTypes, BaseTypeCodegenMethods, BuilderMethods, OverflowOp};
-use rustc_middle::ty::{ParamEnv, Ty};
+use rustc_middle::ty::{self, Ty};
 use rustc_target::abi::Endian;
 use rustc_target::abi::call::{ArgAbi, ArgAttributes, Conv, FnAbi, PassMode};
 use rustc_target::spec;
@@ -380,7 +380,10 @@ impl<'a, 'gcc, 'tcx> Builder<'a, 'gcc, 'tcx> {
         let overflow_field = self.context.new_field(self.location, self.bool_type, "overflow");
 
         let ret_ty = Ty::new_tup(self.tcx, &[self.tcx.types.i128, self.tcx.types.bool]);
-        let layout = self.tcx.layout_of(ParamEnv::reveal_all().and(ret_ty)).unwrap();
+        let layout = self
+            .tcx
+            .layout_of(ty::TypingEnv::fully_monomorphized().as_query_input(ret_ty))
+            .unwrap();
 
         let arg_abi = ArgAbi { layout, mode: PassMode::Direct(ArgAttributes::new()) };
         let mut fn_abi = FnAbi {