StableHasherResult};
pub use rustc_target::abi::*;
+use rustc_target::spec::HasTargetSpec;
+use rustc_target::abi::call::{
+ ArgAttribute, ArgAttributes, ArgType, Conv, FnType, IgnoreMode, PassMode
+};
+
+
pub trait IntegerExt {
fn to_ty<'a, 'tcx>(&self, tcx: TyCtxt<'a, 'tcx, 'tcx>, signed: bool) -> Ty<'tcx>;
}
}
}
+
+pub trait FnTypeExt<'tcx, C> {
+ fn of_instance(cx: &C, instance: &ty::Instance<'tcx>) -> Self
+ where
+ C: LayoutOf<Ty = Ty<'tcx>, TyLayout = TyLayout<'tcx>>
+ + HasDataLayout
+ + HasTargetSpec
+ + HasTyCtxt<'tcx>
+ + HasParamEnv<'tcx>;
+ fn new(cx: &C, sig: ty::FnSig<'tcx>, extra_args: &[Ty<'tcx>]) -> Self
+ where
+ C: LayoutOf<Ty = Ty<'tcx>, TyLayout = TyLayout<'tcx>>
+ + HasDataLayout
+ + HasTargetSpec
+ + HasTyCtxt<'tcx>
+ + HasParamEnv<'tcx>;
+ fn new_vtable(cx: &C, sig: ty::FnSig<'tcx>, extra_args: &[Ty<'tcx>]) -> Self
+ where
+ C: LayoutOf<Ty = Ty<'tcx>, TyLayout = TyLayout<'tcx>>
+ + HasDataLayout
+ + HasTargetSpec
+ + HasTyCtxt<'tcx>
+ + HasParamEnv<'tcx>;
+ fn new_internal(
+ cx: &C,
+ sig: ty::FnSig<'tcx>,
+ extra_args: &[Ty<'tcx>],
+ mk_arg_type: impl Fn(Ty<'tcx>, Option<usize>) -> ArgType<'tcx, Ty<'tcx>>,
+ ) -> Self
+ where
+ C: LayoutOf<Ty = Ty<'tcx>, TyLayout = TyLayout<'tcx>>
+ + HasDataLayout
+ + HasTargetSpec
+ + HasTyCtxt<'tcx>
+ + HasParamEnv<'tcx>;
+}
+
+
+impl<'tcx, C> FnTypeExt<'tcx, C> for call::FnType<'tcx, Ty<'tcx>> {
+ fn of_instance(cx: &C, instance: &ty::Instance<'tcx>) -> Self
+ where
+ C: LayoutOf<Ty = Ty<'tcx>, TyLayout = TyLayout<'tcx>>
+ + HasDataLayout
+ + HasTargetSpec
+ + HasTargetSpec
+ + HasTyCtxt<'tcx>
+ + HasParamEnv<'tcx>,
+ {
+ let sig = instance.fn_sig(cx.tcx());
+ let sig = cx
+ .tcx()
+ .normalize_erasing_late_bound_regions(ty::ParamEnv::reveal_all(), &sig);
+ call::FnType::new(cx, sig, &[])
+ }
+
+ fn new(cx: &C, sig: ty::FnSig<'tcx>, extra_args: &[Ty<'tcx>]) -> Self
+ where
+ C: LayoutOf<Ty = Ty<'tcx>, TyLayout = TyLayout<'tcx>>
+ + HasDataLayout
+ + HasTargetSpec
+ + HasTyCtxt<'tcx>
+ + HasParamEnv<'tcx>,
+ {
+ call::FnType::new_internal(cx, sig, extra_args, |ty, _| ArgType::new(cx.layout_of(ty)))
+ }
+
+
+ fn new_vtable(cx: &C, sig: ty::FnSig<'tcx>, extra_args: &[Ty<'tcx>]) -> Self
+ where
+ C: LayoutOf<Ty = Ty<'tcx>, TyLayout = TyLayout<'tcx>>
+ + HasDataLayout
+ + HasTargetSpec
+ + HasTyCtxt<'tcx>
+ + HasParamEnv<'tcx>,
+ {
+ FnType::new_internal(cx, sig, extra_args, |ty, arg_idx| {
+ let mut layout = cx.layout_of(ty);
+ // Don't pass the vtable, it's not an argument of the virtual fn.
+ // Instead, pass just the data pointer, but give it the type `*const/mut dyn Trait`
+ // or `&/&mut dyn Trait` because this is special-cased elsewhere in codegen
+ if arg_idx == Some(0) {
+ let fat_pointer_ty = if layout.is_unsized() {
+ // unsized `self` is passed as a pointer to `self`
+ // FIXME (mikeyhew) change this to use &own if it is ever added to the language
+ cx.tcx().mk_mut_ptr(layout.ty)
+ } else {
+ match layout.abi {
+ Abi::ScalarPair(..) => (),
+ _ => bug!("receiver type has unsupported layout: {:?}", layout),
+ }
+
+ // In the case of Rc<Self>, we need to explicitly pass a *mut RcBox<Self>
+ // with a Scalar (not ScalarPair) ABI. This is a hack that is understood
+ // elsewhere in the compiler as a method on a `dyn Trait`.
+ // To get the type `*mut RcBox<Self>`, we just keep unwrapping newtypes until we
+ // get a built-in pointer type
+ let mut fat_pointer_layout = layout;
+ 'descend_newtypes: while !fat_pointer_layout.ty.is_unsafe_ptr()
+ && !fat_pointer_layout.ty.is_region_ptr()
+ {
+ 'iter_fields: for i in 0..fat_pointer_layout.fields.count() {
+ let field_layout = fat_pointer_layout.field(cx, i);
+
+ if !field_layout.is_zst() {
+ fat_pointer_layout = field_layout;
+ continue 'descend_newtypes;
+ }
+ }
+
+ bug!(
+ "receiver has no non-zero-sized fields {:?}",
+ fat_pointer_layout
+ );
+ }
+
+ fat_pointer_layout.ty
+ };
+
+ // we now have a type like `*mut RcBox<dyn Trait>`
+ // change its layout to that of `*mut ()`, a thin pointer, but keep the same type
+ // this is understood as a special case elsewhere in the compiler
+ let unit_pointer_ty = cx.tcx().mk_mut_ptr(cx.tcx().mk_unit());
+ layout = cx.layout_of(unit_pointer_ty);
+ layout.ty = fat_pointer_ty;
+ }
+ ArgType::new(layout)
+ })
+ }
+
+ fn new_internal(
+ cx: &C,
+ sig: ty::FnSig<'tcx>,
+ extra_args: &[Ty<'tcx>],
+ mk_arg_type: impl Fn(Ty<'tcx>, Option<usize>) -> ArgType<'tcx, Ty<'tcx>>,
+ ) -> Self
+ where
+ C: LayoutOf<Ty = Ty<'tcx>, TyLayout = TyLayout<'tcx>>
+ + HasDataLayout
+ + HasTargetSpec
+ + HasTargetSpec
+ + HasTyCtxt<'tcx>
+ + HasParamEnv<'tcx>,
+ {
+ debug!("FnType::new_internal({:?}, {:?})", sig, extra_args);
+
+ use rustc_target::spec::abi::Abi::*;
+ let conv = match cx.tcx().sess.target.target.adjust_abi(sig.abi) {
+ RustIntrinsic | PlatformIntrinsic | Rust | RustCall => Conv::C,
+
+ // It's the ABI's job to select this, not ours.
+ System => bug!("system abi should be selected elsewhere"),
+
+ Stdcall => Conv::X86Stdcall,
+ Fastcall => Conv::X86Fastcall,
+ Vectorcall => Conv::X86VectorCall,
+ Thiscall => Conv::X86ThisCall,
+ C => Conv::C,
+ Unadjusted => Conv::C,
+ Win64 => Conv::X86_64Win64,
+ SysV64 => Conv::X86_64SysV,
+ Aapcs => Conv::ArmAapcs,
+ PtxKernel => Conv::PtxKernel,
+ Msp430Interrupt => Conv::Msp430Intr,
+ X86Interrupt => Conv::X86Intr,
+ AmdGpuKernel => Conv::AmdGpuKernel,
+
+ // These API constants ought to be more specific...
+ Cdecl => Conv::C,
+ };
+
+ let mut inputs = sig.inputs();
+ let extra_args = if sig.abi == RustCall {
+ assert!(!sig.c_variadic && extra_args.is_empty());
+
+ match sig.inputs().last().unwrap().sty {
+ ty::Tuple(tupled_arguments) => {
+ inputs = &sig.inputs()[0..sig.inputs().len() - 1];
+ tupled_arguments.iter().map(|k| k.expect_ty()).collect()
+ }
+ _ => {
+ bug!(
+ "argument to function with \"rust-call\" ABI \
+ is not a tuple"
+ );
+ }
+ }
+ } else {
+ assert!(sig.c_variadic || extra_args.is_empty());
+ extra_args.to_vec()
+ };
+
+ let target = &cx.tcx().sess.target.target;
+ let win_x64_gnu =
+ target.target_os == "windows" && target.arch == "x86_64" && target.target_env == "gnu";
+ let linux_s390x =
+ target.target_os == "linux" && target.arch == "s390x" && target.target_env == "gnu";
+ let linux_sparc64 =
+ target.target_os == "linux" && target.arch == "sparc64" && target.target_env == "gnu";
+ let rust_abi = match sig.abi {
+ RustIntrinsic | PlatformIntrinsic | Rust | RustCall => true,
+ _ => false,
+ };
+
+ // Handle safe Rust thin and fat pointers.
+ let adjust_for_rust_scalar = |attrs: &mut ArgAttributes,
+ scalar: &Scalar,
+ layout: TyLayout<'tcx>,
+ offset: Size,
+ is_return: bool| {
+ // Booleans are always an i1 that needs to be zero-extended.
+ if scalar.is_bool() {
+ attrs.set(ArgAttribute::ZExt);
+ return;
+ }
+
+ // Only pointer types handled below.
+ if scalar.value != Pointer {
+ return;
+ }
+
+ if scalar.valid_range.start() < scalar.valid_range.end() {
+ if *scalar.valid_range.start() > 0 {
+ attrs.set(ArgAttribute::NonNull);
+ }
+ }
+
+ if let Some(pointee) = layout.pointee_info_at(cx, offset) {
+ if let Some(kind) = pointee.safe {
+ attrs.pointee_size = pointee.size;
+ attrs.pointee_align = Some(pointee.align);
+
+ // `Box` pointer parameters never alias because ownership is transferred
+ // `&mut` pointer parameters never alias other parameters,
+ // or mutable global data
+ //
+ // `&T` where `T` contains no `UnsafeCell<U>` is immutable,
+ // and can be marked as both `readonly` and `noalias`, as
+ // LLVM's definition of `noalias` is based solely on memory
+ // dependencies rather than pointer equality
+ let no_alias = match kind {
+ PointerKind::Shared => false,
+ PointerKind::UniqueOwned => true,
+ PointerKind::Frozen | PointerKind::UniqueBorrowed => !is_return,
+ };
+ if no_alias {
+ attrs.set(ArgAttribute::NoAlias);
+ }
+
+ if kind == PointerKind::Frozen && !is_return {
+ attrs.set(ArgAttribute::ReadOnly);
+ }
+ }
+ }
+ };
+
+ // Store the index of the last argument. This is useful for working with
+ // C-compatible variadic arguments.
+ let last_arg_idx = if sig.inputs().is_empty() {
+ None
+ } else {
+ Some(sig.inputs().len() - 1)
+ };
+
+ let arg_of = |ty: Ty<'tcx>, arg_idx: Option<usize>| {
+ let is_return = arg_idx.is_none();
+ let mut arg = mk_arg_type(ty, arg_idx);
+ if arg.layout.is_zst() {
+ // For some forsaken reason, x86_64-pc-windows-gnu
+ // doesn't ignore zero-sized struct arguments.
+ // The same is true for s390x-unknown-linux-gnu
+ // and sparc64-unknown-linux-gnu.
+ if is_return || rust_abi || (!win_x64_gnu && !linux_s390x && !linux_sparc64) {
+ arg.mode = PassMode::Ignore(IgnoreMode::Zst);
+ }
+ }
+
+ // If this is a C-variadic function, this is not the return value,
+ // and there is one or more fixed arguments; ensure that the `VaList`
+ // is ignored as an argument.
+ if sig.c_variadic {
+ match (last_arg_idx, arg_idx) {
+ (Some(last_idx), Some(cur_idx)) if last_idx == cur_idx => {
+ let va_list_did = match cx.tcx().lang_items().va_list() {
+ Some(did) => did,
+ None => bug!("`va_list` lang item required for C-variadic functions"),
+ };
+ match ty.sty {
+ ty::Adt(def, _) if def.did == va_list_did => {
+ // This is the "spoofed" `VaList`. Set the arguments mode
+ // so that it will be ignored.
+ arg.mode = PassMode::Ignore(IgnoreMode::CVarArgs);
+ }
+ _ => (),
+ }
+ }
+ _ => {}
+ }
+ }
+
+ // FIXME(eddyb) other ABIs don't have logic for scalar pairs.
+ if !is_return && rust_abi {
+ if let Abi::ScalarPair(ref a, ref b) = arg.layout.abi {
+ let mut a_attrs = ArgAttributes::new();
+ let mut b_attrs = ArgAttributes::new();
+ adjust_for_rust_scalar(&mut a_attrs, a, arg.layout, Size::ZERO, false);
+ adjust_for_rust_scalar(
+ &mut b_attrs,
+ b,
+ arg.layout,
+ a.value.size(cx).align_to(b.value.align(cx).abi),
+ false,
+ );
+ arg.mode = PassMode::Pair(a_attrs, b_attrs);
+ return arg;
+ }
+ }
+
+ if let Abi::Scalar(ref scalar) = arg.layout.abi {
+ if let PassMode::Direct(ref mut attrs) = arg.mode {
+ adjust_for_rust_scalar(attrs, scalar, arg.layout, Size::ZERO, is_return);
+ }
+ }
+
+ arg
+ };
+
+ let fn_ty = FnType {
+ ret: arg_of(sig.output(), None),
+ args: inputs
+ .iter()
+ .cloned()
+ .chain(extra_args)
+ .enumerate()
+ .map(|(i, ty)| arg_of(ty, Some(i)))
+ .collect(),
+ c_variadic: sig.c_variadic,
+ conv,
+ };
+ // FIXME: uncomment this after figuring out wwhere should adjust_for_abi reside.
+ //fn_ty.adjust_for_abi(cx, sig.abi);
+ fn_ty
+ }
+}
}
pub trait FnTypeExt<'tcx> {
- fn of_instance(cx: &CodegenCx<'ll, 'tcx>, instance: &ty::Instance<'tcx>) -> Self;
- fn new(cx: &CodegenCx<'ll, 'tcx>,
- sig: ty::FnSig<'tcx>,
- extra_args: &[Ty<'tcx>]) -> Self;
- fn new_vtable(cx: &CodegenCx<'ll, 'tcx>,
- sig: ty::FnSig<'tcx>,
- extra_args: &[Ty<'tcx>]) -> Self;
- fn new_internal(
- cx: &CodegenCx<'ll, 'tcx>,
- sig: ty::FnSig<'tcx>,
- extra_args: &[Ty<'tcx>],
- mk_arg_type: impl Fn(Ty<'tcx>, Option<usize>) -> ArgType<'tcx, Ty<'tcx>>,
- ) -> Self;
fn adjust_for_abi(&mut self,
cx: &CodegenCx<'ll, 'tcx>,
abi: Abi);
}
impl<'tcx> FnTypeExt<'tcx> for FnType<'tcx, Ty<'tcx>> {
- fn of_instance(cx: &CodegenCx<'ll, 'tcx>, instance: &ty::Instance<'tcx>) -> Self {
- let sig = instance.fn_sig(cx.tcx);
- let sig = cx.tcx.normalize_erasing_late_bound_regions(ty::ParamEnv::reveal_all(), &sig);
- FnType::new(cx, sig, &[])
- }
-
- fn new(cx: &CodegenCx<'ll, 'tcx>,
- sig: ty::FnSig<'tcx>,
- extra_args: &[Ty<'tcx>]) -> Self {
- FnType::new_internal(cx, sig, extra_args, |ty, _| {
- ArgType::new(cx.layout_of(ty))
- })
- }
-
- fn new_vtable(cx: &CodegenCx<'ll, 'tcx>,
- sig: ty::FnSig<'tcx>,
- extra_args: &[Ty<'tcx>]) -> Self {
- FnType::new_internal(cx, sig, extra_args, |ty, arg_idx| {
- let mut layout = cx.layout_of(ty);
- // Don't pass the vtable, it's not an argument of the virtual fn.
- // Instead, pass just the data pointer, but give it the type `*const/mut dyn Trait`
- // or `&/&mut dyn Trait` because this is special-cased elsewhere in codegen
- if arg_idx == Some(0) {
- let fat_pointer_ty = if layout.is_unsized() {
- // unsized `self` is passed as a pointer to `self`
- // FIXME (mikeyhew) change this to use &own if it is ever added to the language
- cx.tcx.mk_mut_ptr(layout.ty)
- } else {
- match layout.abi {
- LayoutAbi::ScalarPair(..) => (),
- _ => bug!("receiver type has unsupported layout: {:?}", layout)
- }
-
- // In the case of Rc<Self>, we need to explicitly pass a *mut RcBox<Self>
- // with a Scalar (not ScalarPair) ABI. This is a hack that is understood
- // elsewhere in the compiler as a method on a `dyn Trait`.
- // To get the type `*mut RcBox<Self>`, we just keep unwrapping newtypes until we
- // get a built-in pointer type
- let mut fat_pointer_layout = layout;
- 'descend_newtypes: while !fat_pointer_layout.ty.is_unsafe_ptr()
- && !fat_pointer_layout.ty.is_region_ptr()
- {
- 'iter_fields: for i in 0..fat_pointer_layout.fields.count() {
- let field_layout = fat_pointer_layout.field(cx, i);
-
- if !field_layout.is_zst() {
- fat_pointer_layout = field_layout;
- continue 'descend_newtypes
- }
- }
-
- bug!("receiver has no non-zero-sized fields {:?}", fat_pointer_layout);
- }
-
- fat_pointer_layout.ty
- };
-
- // we now have a type like `*mut RcBox<dyn Trait>`
- // change its layout to that of `*mut ()`, a thin pointer, but keep the same type
- // this is understood as a special case elsewhere in the compiler
- let unit_pointer_ty = cx.tcx.mk_mut_ptr(cx.tcx.mk_unit());
- layout = cx.layout_of(unit_pointer_ty);
- layout.ty = fat_pointer_ty;
- }
- ArgType::new(layout)
- })
- }
-
- fn new_internal(
- cx: &CodegenCx<'ll, 'tcx>,
- sig: ty::FnSig<'tcx>,
- extra_args: &[Ty<'tcx>],
- mk_arg_type: impl Fn(Ty<'tcx>, Option<usize>) -> ArgType<'tcx, Ty<'tcx>>,
- ) -> Self {
- debug!("FnType::new_internal({:?}, {:?})", sig, extra_args);
-
- use self::Abi::*;
- let conv = match cx.sess().target.target.adjust_abi(sig.abi) {
- RustIntrinsic | PlatformIntrinsic |
- Rust | RustCall => Conv::C,
-
- // It's the ABI's job to select this, not ours.
- System => bug!("system abi should be selected elsewhere"),
-
- Stdcall => Conv::X86Stdcall,
- Fastcall => Conv::X86Fastcall,
- Vectorcall => Conv::X86VectorCall,
- Thiscall => Conv::X86ThisCall,
- C => Conv::C,
- Unadjusted => Conv::C,
- Win64 => Conv::X86_64Win64,
- SysV64 => Conv::X86_64SysV,
- Aapcs => Conv::ArmAapcs,
- PtxKernel => Conv::PtxKernel,
- Msp430Interrupt => Conv::Msp430Intr,
- X86Interrupt => Conv::X86Intr,
- AmdGpuKernel => Conv::AmdGpuKernel,
-
- // These API constants ought to be more specific...
- Cdecl => Conv::C,
- };
-
- let mut inputs = sig.inputs();
- let extra_args = if sig.abi == RustCall {
- assert!(!sig.c_variadic && extra_args.is_empty());
-
- match sig.inputs().last().unwrap().sty {
- ty::Tuple(tupled_arguments) => {
- inputs = &sig.inputs()[0..sig.inputs().len() - 1];
- tupled_arguments.iter().map(|k| k.expect_ty()).collect()
- }
- _ => {
- bug!("argument to function with \"rust-call\" ABI \
- is not a tuple");
- }
- }
- } else {
- assert!(sig.c_variadic || extra_args.is_empty());
- extra_args.to_vec()
- };
-
- let target = &cx.sess().target.target;
- let win_x64_gnu = target.target_os == "windows"
- && target.arch == "x86_64"
- && target.target_env == "gnu";
- let linux_s390x = target.target_os == "linux"
- && target.arch == "s390x"
- && target.target_env == "gnu";
- let linux_sparc64 = target.target_os == "linux"
- && target.arch == "sparc64"
- && target.target_env == "gnu";
- let rust_abi = match sig.abi {
- RustIntrinsic | PlatformIntrinsic | Rust | RustCall => true,
- _ => false
- };
-
- // Handle safe Rust thin and fat pointers.
- let adjust_for_rust_scalar = |attrs: &mut ArgAttributes,
- scalar: &layout::Scalar,
- layout: TyLayout<'tcx, Ty<'tcx>>,
- offset: Size,
- is_return: bool| {
- // Booleans are always an i1 that needs to be zero-extended.
- if scalar.is_bool() {
- attrs.set(ArgAttribute::ZExt);
- return;
- }
-
- // Only pointer types handled below.
- if scalar.value != layout::Pointer {
- return;
- }
-
- if scalar.valid_range.start() < scalar.valid_range.end() {
- if *scalar.valid_range.start() > 0 {
- attrs.set(ArgAttribute::NonNull);
- }
- }
-
- if let Some(pointee) = layout.pointee_info_at(cx, offset) {
- if let Some(kind) = pointee.safe {
- attrs.pointee_size = pointee.size;
- attrs.pointee_align = Some(pointee.align);
-
- // `Box` pointer parameters never alias because ownership is transferred
- // `&mut` pointer parameters never alias other parameters,
- // or mutable global data
- //
- // `&T` where `T` contains no `UnsafeCell<U>` is immutable,
- // and can be marked as both `readonly` and `noalias`, as
- // LLVM's definition of `noalias` is based solely on memory
- // dependencies rather than pointer equality
- let no_alias = match kind {
- PointerKind::Shared => false,
- PointerKind::UniqueOwned => true,
- PointerKind::Frozen |
- PointerKind::UniqueBorrowed => !is_return
- };
- if no_alias {
- attrs.set(ArgAttribute::NoAlias);
- }
-
- if kind == PointerKind::Frozen && !is_return {
- attrs.set(ArgAttribute::ReadOnly);
- }
- }
- }
- };
-
- // Store the index of the last argument. This is useful for working with
- // C-compatible variadic arguments.
- let last_arg_idx = if sig.inputs().is_empty() {
- None
- } else {
- Some(sig.inputs().len() - 1)
- };
-
- let arg_of = |ty: Ty<'tcx>, arg_idx: Option<usize>| {
- let is_return = arg_idx.is_none();
- let mut arg = mk_arg_type(ty, arg_idx);
- if arg.layout.is_zst() {
- // For some forsaken reason, x86_64-pc-windows-gnu
- // doesn't ignore zero-sized struct arguments.
- // The same is true for s390x-unknown-linux-gnu
- // and sparc64-unknown-linux-gnu.
- if is_return || rust_abi || (!win_x64_gnu && !linux_s390x && !linux_sparc64) {
- arg.mode = PassMode::Ignore(IgnoreMode::Zst);
- }
- }
-
- // If this is a C-variadic function, this is not the return value,
- // and there is one or more fixed arguments; ensure that the `VaList`
- // is ignored as an argument.
- if sig.c_variadic {
- match (last_arg_idx, arg_idx) {
- (Some(last_idx), Some(cur_idx)) if last_idx == cur_idx => {
- let va_list_did = match cx.tcx.lang_items().va_list() {
- Some(did) => did,
- None => bug!("`va_list` lang item required for C-variadic functions"),
- };
- match ty.sty {
- ty::Adt(def, _) if def.did == va_list_did => {
- // This is the "spoofed" `VaList`. Set the arguments mode
- // so that it will be ignored.
- arg.mode = PassMode::Ignore(IgnoreMode::CVarArgs);
- },
- _ => (),
- }
- }
- _ => {}
- }
- }
-
- // FIXME(eddyb) other ABIs don't have logic for scalar pairs.
- if !is_return && rust_abi {
- if let layout::Abi::ScalarPair(ref a, ref b) = arg.layout.abi {
- let mut a_attrs = ArgAttributes::new();
- let mut b_attrs = ArgAttributes::new();
- adjust_for_rust_scalar(&mut a_attrs,
- a,
- arg.layout,
- Size::ZERO,
- false);
- adjust_for_rust_scalar(&mut b_attrs,
- b,
- arg.layout,
- a.value.size(cx).align_to(b.value.align(cx).abi),
- false);
- arg.mode = PassMode::Pair(a_attrs, b_attrs);
- return arg;
- }
- }
-
- if let layout::Abi::Scalar(ref scalar) = arg.layout.abi {
- if let PassMode::Direct(ref mut attrs) = arg.mode {
- adjust_for_rust_scalar(attrs,
- scalar,
- arg.layout,
- Size::ZERO,
- is_return);
- }
- }
-
- arg
- };
-
- let mut fn_ty = FnType {
- ret: arg_of(sig.output(), None),
- args: inputs.iter().cloned().chain(extra_args).enumerate().map(|(i, ty)| {
- arg_of(ty, Some(i))
- }).collect(),
- c_variadic: sig.c_variadic,
- conv,
- };
- fn_ty.adjust_for_abi(cx, sig.abi);
- fn_ty
- }
-
fn adjust_for_abi(&mut self,
cx: &CodegenCx<'ll, 'tcx>,
abi: Abi) {
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