//! Codegen the completed AST to the LLVM IR.
//!
-//! Some functions here, such as codegen_block and codegen_expr, return a value --
-//! the result of the codegen to LLVM -- while others, such as codegen_fn
-//! and mono_item, are called only for the side effect of adding a
+//! Some functions here, such as `codegen_block` and `codegen_expr`, return a value --
+//! the result of the codegen to LLVM -- while others, such as `codegen_fn`
+//! and `mono_item`, are called only for the side effect of adding a
//! particular definition to the LLVM IR output we're producing.
//!
//! Hopefully useful general knowledge about codegen:
//!
-//! * There's no way to find out the `Ty` type of a Value. Doing so
+//! * There's no way to find out the `Ty` type of a `Value`. Doing so
//! would be "trying to get the eggs out of an omelette" (credit:
//! pcwalton). You can, instead, find out its `llvm::Type` by calling `val_ty`,
//! but one `llvm::Type` corresponds to many `Ty`s; for instance, `tup(int, int,
//! int)` and `rec(x=int, y=int, z=int)` will have the same `llvm::Type`.
-use crate::{ModuleCodegen, ModuleKind, CachedModuleCodegen};
+use crate::{CachedModuleCodegen, CrateInfo, MemFlags, ModuleCodegen, ModuleKind};
+use crate::back::write::{
+ OngoingCodegen, start_async_codegen, submit_pre_lto_module_to_llvm,
+ submit_post_lto_module_to_llvm,
+};
+use crate::common::{RealPredicate, TypeKind, IntPredicate};
+use crate::meth;
+use crate::mir;
+use crate::mir::operand::OperandValue;
+use crate::mir::place::PlaceRef;
+use crate::traits::*;
-use rustc::dep_graph::cgu_reuse_tracker::CguReuse;
+use rustc::hir;
+use rustc_session::cgu_reuse_tracker::CguReuse;
use rustc::hir::def_id::{DefId, LOCAL_CRATE};
use rustc::middle::cstore::EncodedMetadata;
use rustc::middle::lang_items::StartFnLangItem;
use rustc::mir::mono::{CodegenUnitNameBuilder, CodegenUnit, MonoItem};
use rustc::ty::{self, Ty, TyCtxt, Instance};
use rustc::ty::layout::{self, Align, TyLayout, LayoutOf, VariantIdx, HasTyCtxt};
+use rustc::ty::layout::{FAT_PTR_ADDR, FAT_PTR_EXTRA};
use rustc::ty::query::Providers;
use rustc::middle::cstore::{self, LinkagePreference};
use rustc::util::common::{time, print_time_passes_entry, set_time_depth, time_depth};
use rustc::util::nodemap::FxHashMap;
use rustc_index::vec::Idx;
use rustc_codegen_utils::{symbol_names_test, check_for_rustc_errors_attr};
-use rustc::ty::layout::{FAT_PTR_ADDR, FAT_PTR_EXTRA};
-use crate::mir::place::PlaceRef;
-use crate::back::write::{OngoingCodegen, start_async_codegen, submit_pre_lto_module_to_llvm,
- submit_post_lto_module_to_llvm};
-use crate::{MemFlags, CrateInfo};
-use crate::common::{RealPredicate, TypeKind, IntPredicate};
-use crate::meth;
-use crate::mir;
-
-use crate::traits::*;
+use syntax::attr;
+use syntax_pos::Span;
use std::cmp;
use std::ops::{Deref, DerefMut};
use std::time::{Instant, Duration};
-use syntax_pos::Span;
-use syntax::attr;
-use rustc::hir;
-
-use crate::mir::operand::OperandValue;
pub fn bin_op_to_icmp_predicate(op: hir::BinOpKind,
signed: bool)
/// Retrieves the information we are losing (making dynamic) in an unsizing
/// adjustment.
///
-/// The `old_info` argument is a bit funny. It is intended for use
-/// in an upcast, where the new vtable for an object will be derived
-/// from the old one.
+/// The `old_info` argument is a bit odd. It is intended for use in an upcast,
+/// where the new vtable for an object will be derived from the old one.
pub fn unsized_info<'tcx, Cx: CodegenMethods<'tcx>>(
cx: &Cx,
source: Ty<'tcx>,
(_, &ty::Dynamic(ref data, ..)) => {
let vtable_ptr = cx.layout_of(cx.tcx().mk_mut_ptr(target))
.field(cx, FAT_PTR_EXTRA);
- cx.const_ptrcast(meth::get_vtable(cx, source, data.principal()),
- cx.backend_type(vtable_ptr))
+ cx.const_ptrcast(
+ meth::get_vtable(cx, source, data.principal()),
+ cx.backend_type(vtable_ptr),
+ )
}
- _ => bug!("unsized_info: invalid unsizing {:?} -> {:?}",
- source,
- target),
+ _ => bug!(
+ "unsized_info: invalid unsizing {:?} -> {:?}",
+ source, target
+ ),
}
}
-/// Coerce `src` to `dst_ty`. `src_ty` must be a thin pointer.
+/// Coerces `src` to `dst_ty`. `src_ty` must be a thin pointer.
pub fn unsize_thin_ptr<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
bx: &mut Bx,
src: Bx::Value,
}
}
-/// Coerce `src`, which is a reference to a value of type `src_ty`,
-/// to a value of type `dst_ty` and store the result in `dst`
+/// Coerces `src`, which is a reference to a value of type `src_ty`,
+/// to a value of type `dst_ty`, and stores the result in `dst`.
pub fn coerce_unsized_into<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
bx: &mut Bx,
src: PlaceRef<'tcx, Bx::Value>,
if src_f.layout.ty == dst_f.layout.ty {
memcpy_ty(bx, dst_f.llval, dst_f.align, src_f.llval, src_f.align,
- src_f.layout, MemFlags::empty());
+ src_f.layout, MemFlags::empty());
} else {
coerce_unsized_into(bx, src_f, dst_f);
}
}
}
- _ => bug!("coerce_unsized_into: invalid coercion {:?} -> {:?}",
- src_ty,
- dst_ty),
+ _ => bug!(
+ "coerce_unsized_into: invalid coercion {:?} -> {:?}",
+ src_ty,
+ dst_ty,
+ ),
}
}
// release builds.
info!("codegen_instance({})", instance);
- let sig = instance.fn_sig(cx.tcx());
- let sig = cx.tcx().normalize_erasing_late_bound_regions(ty::ParamEnv::reveal_all(), &sig);
-
- let lldecl = cx.get_fn(instance);
-
- let mir = cx.tcx().instance_mir(instance.def);
- mir::codegen_mir::<Bx>(cx, lldecl, &mir, instance, sig);
+ mir::codegen_mir::<Bx>(cx, instance);
}
/// Creates the `main` function which will initialize the rust runtime and call
});
let allocator_module = if any_dynamic_crate {
None
- } else if let Some(kind) = *tcx.sess.allocator_kind.get() {
+ } else if let Some(kind) = tcx.allocator_kind() {
let llmod_id = cgu_name_builder.build_cgu_name(LOCAL_CRATE,
&["crate"],
- Some("allocator")).as_str()
- .to_string();
+ Some("allocator")).to_string();
let mut modules = backend.new_metadata(tcx, &llmod_id);
time(tcx.sess, "write allocator module", || {
backend.codegen_allocator(tcx, &mut modules, kind)
// Codegen the encoded metadata.
let metadata_cgu_name = cgu_name_builder.build_cgu_name(LOCAL_CRATE,
&["crate"],
- Some("metadata")).as_str()
- .to_string();
+ Some("metadata")).to_string();
let mut metadata_llvm_module = backend.new_metadata(tcx, &metadata_cgu_name);
time(tcx.sess, "write compressed metadata", || {
backend.write_compressed_metadata(tcx, &ongoing_codegen.metadata,
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