Auto merge of #60693 - saleemjaffer:refactor_fntype_stuff, r=eddyb

refactor some `FnType` stuff to `rustc::ty::layout`

Does work in the direction of #56166.

Author: bors

src/librustc/ty/layout.rs

@@ -18,6 +18,7 @@ use rustc_codegen_ssa::traits::*;
 use rustc_codegen_ssa::base::to_immediate;
 use rustc_codegen_ssa::mir::operand::{OperandValue, OperandRef};
 use rustc_codegen_ssa::mir::place::PlaceRef;
+use rustc_target::spec::{HasTargetSpec, Target};
 use std::borrow::Cow;
 use std::ops::{Deref, Range};
 use std::ptr;
@@ -72,6 +73,12 @@ impl ty::layout::HasParamEnv<'tcx> for Builder<'_, '_, 'tcx> {
     }
 }
 
+impl HasTargetSpec for Builder<'_, '_, 'tcx> {
+    fn target_spec(&self) -> &Target {
+        &self.cx.target_spec()
+    }
+}
+
 impl ty::layout::LayoutOf for Builder<'_, '_, 'tcx> {
     type Ty = Ty<'tcx>;
     type TyLayout = TyLayout<'tcx>;

src/librustc_codegen_llvm/abi.rs

@@ -13,13 +13,13 @@
 
 use crate::llvm;
 use crate::llvm::AttributePlace::Function;
-use crate::abi::{FnType, FnTypeExt};
+use crate::abi::{FnType, FnTypeLlvmExt};
 use crate::attributes;
 use crate::context::CodegenCx;
 use crate::type_::Type;
 use crate::value::Value;
 use rustc::ty::{self, PolyFnSig};
-use rustc::ty::layout::LayoutOf;
+use rustc::ty::layout::{FnTypeExt, LayoutOf};
 use rustc::session::config::Sanitizer;
 use rustc_data_structures::small_c_str::SmallCStr;
 use rustc_codegen_ssa::traits::*;

src/librustc_codegen_llvm/builder.rs

@@ -10,7 +10,7 @@ use rustc_codegen_ssa::traits::*;
 
 use crate::common;
 use crate::type_of::LayoutLlvmExt;
-use crate::abi::{LlvmType, FnTypeExt};
+use crate::abi::{LlvmType, FnTypeLlvmExt};
 use syntax::ast;
 use rustc::ty::Ty;
 use rustc::ty::layout::{self, Align, Size, TyLayout};

src/librustc_codegen_llvm/declare.rs

@@ -1,8 +1,8 @@
-use crate::abi::{FnType, FnTypeExt};
+use crate::abi::{FnType};
 use crate::common::*;
 use crate::type_::Type;
 use rustc::ty::{self, Ty, TypeFoldable};
-use rustc::ty::layout::{self, Align, LayoutOf, PointeeInfo, Size, TyLayout};
+use rustc::ty::layout::{self, Align, LayoutOf, FnTypeExt, PointeeInfo, Size, TyLayout};
 use rustc_target::abi::{FloatTy, TyLayoutMethods};
 use rustc_mir::monomorphize::item::DefPathBasedNames;
 use rustc_codegen_ssa::traits::*;

src/librustc_codegen_llvm/type_.rs

@@ -1,6 +1,6 @@
 use rustc::middle::lang_items;
 use rustc::ty::{self, Ty, TypeFoldable};
-use rustc::ty::layout::{self, LayoutOf, HasTyCtxt};
+use rustc::ty::layout::{self, LayoutOf, HasTyCtxt, FnTypeExt};
 use rustc::mir::{self, Place, PlaceBase, Static, StaticKind};
 use rustc::mir::interpret::InterpError;
 use rustc_target::abi::call::{ArgType, FnType, PassMode, IgnoreMode};
@@ -334,14 +334,14 @@ impl<'a, 'tcx: 'a, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                     ty::ParamEnv::reveal_all(),
                     &sig,
                 );
-                let fn_ty = bx.new_vtable(sig, &[]);
+                let fn_ty = FnType::new_vtable(&bx, sig, &[]);
                 let vtable = args[1];
                 args = &args[..1];
                 (meth::DESTRUCTOR.get_fn(&mut bx, vtable, &fn_ty), fn_ty)
             }
             _ => {
                 (bx.get_fn(drop_fn),
-                 bx.fn_type_of_instance(&drop_fn))
+                 FnType::of_instance(&bx, &drop_fn))
             }
         };
         helper.do_call(self, &mut bx, fn_ty, drop_fn, args,
@@ -439,7 +439,7 @@ impl<'a, 'tcx: 'a, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
         // Obtain the panic entry point.
         let def_id = common::langcall(bx.tcx(), Some(span), "", lang_item);
         let instance = ty::Instance::mono(bx.tcx(), def_id);
-        let fn_ty = bx.fn_type_of_instance(&instance);
+        let fn_ty = FnType::of_instance(&bx, &instance);
         let llfn = bx.get_fn(instance);
 
         // Codegen the actual panic invoke/call.
@@ -518,15 +518,15 @@ impl<'a, 'tcx: 'a, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
 
         let fn_ty = match def {
             Some(ty::InstanceDef::Virtual(..)) => {
-                bx.new_vtable(sig, &extra_args)
+                FnType::new_vtable(&bx, sig, &extra_args)
             }
             Some(ty::InstanceDef::DropGlue(_, None)) => {
                 // Empty drop glue; a no-op.
                 let &(_, target) = destination.as_ref().unwrap();
                 helper.funclet_br(self, &mut bx, target);
                 return;
             }
-            _ => bx.new_fn_type(sig, &extra_args)
+            _ => FnType::new(&bx, sig, &extra_args)
         };
 
         // Emit a panic or a no-op for `panic_if_uninhabited`.
@@ -556,7 +556,7 @@ impl<'a, 'tcx: 'a, Bx: BuilderMethods<'a, 'tcx>> FunctionCx<'a, 'tcx, Bx> {
                 let def_id =
                     common::langcall(bx.tcx(), Some(span), "", lang_items::PanicFnLangItem);
                 let instance = ty::Instance::mono(bx.tcx(), def_id);
-                let fn_ty = bx.fn_type_of_instance(&instance);
+                let fn_ty = FnType::of_instance(&bx, &instance);
                 let llfn = bx.get_fn(instance);
 
                 // Codegen the actual panic invoke/call.

src/librustc_codegen_llvm/type_of.rs

@@ -1,5 +1,5 @@
 use rustc::ty::{self, Ty, TypeFoldable, UpvarSubsts};
-use rustc::ty::layout::{TyLayout, HasTyCtxt};
+use rustc::ty::layout::{TyLayout, HasTyCtxt, FnTypeExt};
 use rustc::mir::{self, Mir};
 use rustc::session::config::DebugInfo;
 use rustc_mir::monomorphize::Instance;
@@ -202,7 +202,7 @@ pub fn codegen_mir<'a, 'tcx: 'a, Bx: BuilderMethods<'a, 'tcx>>(
 ) {
     assert!(!instance.substs.needs_infer());
 
-    let fn_ty = cx.new_fn_type(sig, &[]);
+    let fn_ty = FnType::new(cx, sig, &[]);
     debug!("fn_ty: {:?}", fn_ty);
     let mut debug_context =
         cx.create_function_debug_context(instance, sig, llfn, mir);

src/librustc_codegen_ssa/mir/block.rs

@@ -1,13 +1,7 @@
 use super::BackendTypes;
-use rustc::ty::{FnSig, Instance, Ty};
+use rustc::ty::{Ty};
 use rustc_target::abi::call::FnType;
 
-pub trait AbiMethods<'tcx> {
-    fn new_fn_type(&self, sig: FnSig<'tcx>, extra_args: &[Ty<'tcx>]) -> FnType<'tcx, Ty<'tcx>>;
-    fn new_vtable(&self, sig: FnSig<'tcx>, extra_args: &[Ty<'tcx>]) -> FnType<'tcx, Ty<'tcx>>;
-    fn fn_type_of_instance(&self, instance: &Instance<'tcx>) -> FnType<'tcx, Ty<'tcx>>;
-}
-
 pub trait AbiBuilderMethods<'tcx>: BackendTypes {
     fn apply_attrs_callsite(&mut self, ty: &FnType<'tcx, Ty<'tcx>>, callsite: Self::Value);
     fn get_param(&self, index: usize) -> Self::Value;

src/librustc_codegen_ssa/mir/mod.rs

@@ -11,6 +11,7 @@ use crate::mir::place::PlaceRef;
 use crate::MemFlags;
 use rustc::ty::Ty;
 use rustc::ty::layout::{Align, Size, HasParamEnv};
+use rustc_target::spec::{HasTargetSpec};
 use std::ops::Range;
 use std::iter::TrustedLen;
 
@@ -30,6 +31,7 @@ pub trait BuilderMethods<'a, 'tcx: 'a>:
     + AsmBuilderMethods<'tcx>
     + StaticBuilderMethods<'tcx>
     + HasParamEnv<'tcx>
+    + HasTargetSpec
 
 {
     fn new_block<'b>(cx: &'a Self::CodegenCx, llfn: Self::Value, name: &'b str) -> Self;