Module rustc_codegen_ssa::base

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 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 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 Tys; for instance, tup(int, int, int) and rec(x=int, y=int, z=int) will have the same llvm::Type.

Structs

AbortCodegenOnDrop

A curious wrapper structure whose only purpose is to call codegen_aborted when it's dropped abnormally.

Functions

bin_op_to_fcmp_predicate
bin_op_to_icmp_predicate
cast_shift_expr_rhs
cast_shift_rhs
codegen_crate
codegen_instance
coerce_unsized_into	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.
compare_simd_types
determine_cgu_reuse
finalize_tcx
get_argc_argv	Obtain the argc and argv values to pass to the rust start function.
maybe_create_entry_wrapper	Creates the main function which will initialize the rust runtime and call users main function.
memcpy_ty
provide_both
unsize_thin_ptr	Coerces src to dst_ty. src_ty must be a thin pointer.
unsized_info	Retrieves the information we are losing (making dynamic) in an unsizing adjustment.
wants_msvc_seh	Returns true if this session's target will use SEH-based unwinding.