4300d4d2fa
Conflicts: src/libcore/core.rc src/libcore/hashmap.rs src/libcore/num/f32.rs src/libcore/num/f64.rs src/libcore/num/float.rs src/libcore/num/int-template.rs src/libcore/num/num.rs src/libcore/num/strconv.rs src/libcore/num/uint-template.rs src/libcore/ops.rs src/libcore/os.rs src/libcore/prelude.rs src/libcore/rt/mod.rs src/libcore/unstable/lang.rs src/librustc/driver/session.rs src/librustc/middle/astencode.rs src/librustc/middle/borrowck/check_loans.rs src/librustc/middle/borrowck/gather_loans.rs src/librustc/middle/borrowck/loan.rs src/librustc/middle/borrowck/preserve.rs src/librustc/middle/liveness.rs src/librustc/middle/mem_categorization.rs src/librustc/middle/region.rs src/librustc/middle/trans/base.rs src/librustc/middle/trans/inline.rs src/librustc/middle/trans/reachable.rs src/librustc/middle/typeck/check/_match.rs src/librustc/middle/typeck/check/regionck.rs src/librustc/util/ppaux.rs src/libstd/arena.rs src/libstd/ebml.rs src/libstd/json.rs src/libstd/serialize.rs src/libstd/std.rc src/libsyntax/ast_map.rs src/libsyntax/parse/parser.rs src/test/compile-fail/borrowck-uniq-via-box.rs src/test/compile-fail/regions-infer-borrow-scope-within-loop.rs src/test/run-pass/borrowck-nested-calls.rs
1314 lines
51 KiB
Rust
1314 lines
51 KiB
Rust
// Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
use back::{link, abi};
|
|
use lib::llvm::{SequentiallyConsistent, Acquire, Release, Xchg};
|
|
use lib::llvm::{TypeRef, ValueRef};
|
|
use lib;
|
|
use middle::trans::base::*;
|
|
use middle::trans::cabi;
|
|
use middle::trans::cabi_x86;
|
|
use middle::trans::cabi_x86_64;
|
|
use middle::trans::cabi_arm;
|
|
use middle::trans::cabi_mips;
|
|
use middle::trans::build::*;
|
|
use middle::trans::callee::*;
|
|
use middle::trans::common::*;
|
|
use middle::trans::datum::*;
|
|
use middle::trans::expr::Ignore;
|
|
use middle::trans::machine::llsize_of;
|
|
use middle::trans::glue;
|
|
use middle::trans::machine;
|
|
use middle::trans::type_of::*;
|
|
use middle::trans::type_of;
|
|
use middle::ty;
|
|
use middle::ty::{FnSig, arg};
|
|
use util::ppaux::ty_to_str;
|
|
|
|
use syntax::codemap::span;
|
|
use syntax::{ast, ast_util};
|
|
use syntax::{attr, ast_map};
|
|
use syntax::opt_vec;
|
|
use syntax::parse::token::special_idents;
|
|
use syntax::abi::{X86, X86_64, Arm, Mips};
|
|
use syntax::abi::{RustIntrinsic, Rust, Stdcall, Fastcall,
|
|
Cdecl, Aapcs, C};
|
|
|
|
fn abi_info(ccx: @CrateContext) -> @cabi::ABIInfo {
|
|
return match ccx.sess.targ_cfg.arch {
|
|
X86 => cabi_x86::abi_info(ccx),
|
|
X86_64 => cabi_x86_64::abi_info(),
|
|
Arm => cabi_arm::abi_info(),
|
|
Mips => cabi_mips::abi_info(),
|
|
}
|
|
}
|
|
|
|
pub fn link_name(ccx: @CrateContext, i: @ast::foreign_item) -> @~str {
|
|
match attr::first_attr_value_str_by_name(i.attrs, ~"link_name") {
|
|
None => ccx.sess.str_of(i.ident),
|
|
Some(ln) => ln,
|
|
}
|
|
}
|
|
|
|
struct ShimTypes {
|
|
fn_sig: ty::FnSig,
|
|
|
|
/// LLVM types that will appear on the foreign function
|
|
llsig: LlvmSignature,
|
|
|
|
/// True if there is a return value (not bottom, not unit)
|
|
ret_def: bool,
|
|
|
|
/// Type of the struct we will use to shuttle values back and forth.
|
|
/// This is always derived from the llsig.
|
|
bundle_ty: TypeRef,
|
|
|
|
/// Type of the shim function itself.
|
|
shim_fn_ty: TypeRef,
|
|
|
|
/// Adapter object for handling native ABI rules (trust me, you
|
|
/// don't want to know).
|
|
fn_ty: cabi::FnType
|
|
}
|
|
|
|
struct LlvmSignature {
|
|
llarg_tys: ~[TypeRef],
|
|
llret_ty: TypeRef,
|
|
sret: bool,
|
|
}
|
|
|
|
fn foreign_signature(ccx: @CrateContext, fn_sig: &ty::FnSig)
|
|
-> LlvmSignature {
|
|
/*!
|
|
* The ForeignSignature is the LLVM types of the arguments/return type
|
|
* of a function. Note that these LLVM types are not quite the same
|
|
* as the LLVM types would be for a native Rust function because foreign
|
|
* functions just plain ignore modes. They also don't pass aggregate
|
|
* values by pointer like we do.
|
|
*/
|
|
|
|
let llarg_tys = fn_sig.inputs.map(|arg| type_of(ccx, arg.ty));
|
|
let llret_ty = type_of::type_of(ccx, fn_sig.output);
|
|
LlvmSignature {
|
|
llarg_tys: llarg_tys,
|
|
llret_ty: llret_ty,
|
|
sret: !ty::type_is_immediate(fn_sig.output),
|
|
}
|
|
}
|
|
|
|
fn shim_types(ccx: @CrateContext, id: ast::node_id) -> ShimTypes {
|
|
let fn_sig = match ty::get(ty::node_id_to_type(ccx.tcx, id)).sty {
|
|
ty::ty_bare_fn(ref fn_ty) => copy fn_ty.sig,
|
|
_ => ccx.sess.bug(~"c_arg_and_ret_lltys called on non-function type")
|
|
};
|
|
let llsig = foreign_signature(ccx, &fn_sig);
|
|
let bundle_ty = T_struct(vec::append_one(copy llsig.llarg_tys,
|
|
T_ptr(llsig.llret_ty)),
|
|
false);
|
|
let ret_def = !ty::type_is_bot(fn_sig.output) &&
|
|
!ty::type_is_nil(fn_sig.output);
|
|
let fn_ty = abi_info(ccx).compute_info(llsig.llarg_tys,
|
|
llsig.llret_ty,
|
|
ret_def);
|
|
ShimTypes {
|
|
fn_sig: fn_sig,
|
|
llsig: llsig,
|
|
ret_def: ret_def,
|
|
bundle_ty: bundle_ty,
|
|
shim_fn_ty: T_fn(~[T_ptr(bundle_ty)], T_nil()),
|
|
fn_ty: fn_ty
|
|
}
|
|
}
|
|
|
|
type shim_arg_builder<'self> =
|
|
&'self fn(bcx: block, tys: &ShimTypes,
|
|
llargbundle: ValueRef) -> ~[ValueRef];
|
|
|
|
type shim_ret_builder<'self> =
|
|
&'self fn(bcx: block, tys: &ShimTypes,
|
|
llargbundle: ValueRef,
|
|
llretval: ValueRef);
|
|
|
|
fn build_shim_fn_(ccx: @CrateContext,
|
|
shim_name: ~str,
|
|
llbasefn: ValueRef,
|
|
tys: &ShimTypes,
|
|
cc: lib::llvm::CallConv,
|
|
arg_builder: shim_arg_builder,
|
|
ret_builder: shim_ret_builder)
|
|
-> ValueRef {
|
|
let llshimfn = decl_internal_cdecl_fn(
|
|
ccx.llmod, shim_name, tys.shim_fn_ty);
|
|
|
|
// Declare the body of the shim function:
|
|
let fcx = new_fn_ctxt(ccx, ~[], llshimfn, tys.fn_sig.output, None);
|
|
let bcx = top_scope_block(fcx, None);
|
|
let lltop = bcx.llbb;
|
|
let llargbundle = get_param(llshimfn, 0u);
|
|
let llargvals = arg_builder(bcx, tys, llargbundle);
|
|
|
|
// Create the call itself and store the return value:
|
|
let llretval = CallWithConv(bcx, llbasefn, llargvals, cc);
|
|
|
|
ret_builder(bcx, tys, llargbundle, llretval);
|
|
|
|
// Don't finish up the function in the usual way, because this doesn't
|
|
// follow the normal Rust calling conventions.
|
|
tie_up_header_blocks(fcx, lltop);
|
|
|
|
let ret_cx = raw_block(fcx, false, fcx.llreturn);
|
|
Ret(ret_cx, C_null(T_nil()));
|
|
|
|
return llshimfn;
|
|
}
|
|
|
|
type wrap_arg_builder<'self> = &'self fn(bcx: block,
|
|
tys: &ShimTypes,
|
|
llwrapfn: ValueRef,
|
|
llargbundle: ValueRef);
|
|
|
|
type wrap_ret_builder<'self> = &'self fn(bcx: block,
|
|
tys: &ShimTypes,
|
|
llargbundle: ValueRef);
|
|
|
|
fn build_wrap_fn_(ccx: @CrateContext,
|
|
tys: &ShimTypes,
|
|
llshimfn: ValueRef,
|
|
llwrapfn: ValueRef,
|
|
shim_upcall: ValueRef,
|
|
needs_c_return: bool,
|
|
arg_builder: wrap_arg_builder,
|
|
ret_builder: wrap_ret_builder) {
|
|
let _icx = ccx.insn_ctxt("foreign::build_wrap_fn_");
|
|
let fcx = new_fn_ctxt(ccx, ~[], llwrapfn, tys.fn_sig.output, None);
|
|
|
|
// Patch up the return type if it's not immediate and we're returning via
|
|
// the C ABI.
|
|
if needs_c_return && !ty::type_is_immediate(tys.fn_sig.output) {
|
|
let lloutputtype = type_of::type_of(*fcx.ccx, tys.fn_sig.output);
|
|
fcx.llretptr = Some(alloca(raw_block(fcx, false, fcx.llstaticallocas),
|
|
lloutputtype));
|
|
}
|
|
|
|
let bcx = top_scope_block(fcx, None);
|
|
let lltop = bcx.llbb;
|
|
|
|
// Allocate the struct and write the arguments into it.
|
|
let llargbundle = alloca(bcx, tys.bundle_ty);
|
|
arg_builder(bcx, tys, llwrapfn, llargbundle);
|
|
|
|
// Create call itself.
|
|
let llshimfnptr = PointerCast(bcx, llshimfn, T_ptr(T_i8()));
|
|
let llrawargbundle = PointerCast(bcx, llargbundle, T_ptr(T_i8()));
|
|
Call(bcx, shim_upcall, ~[llrawargbundle, llshimfnptr]);
|
|
ret_builder(bcx, tys, llargbundle);
|
|
|
|
// Perform a custom version of `finish_fn`. First, tie up the header
|
|
// blocks.
|
|
tie_up_header_blocks(fcx, lltop);
|
|
|
|
// Then return according to the C ABI.
|
|
unsafe {
|
|
let return_context = raw_block(fcx, false, fcx.llreturn);
|
|
|
|
let llfunctiontype = val_ty(llwrapfn);
|
|
let llfunctiontype =
|
|
::lib::llvm::llvm::LLVMGetElementType(llfunctiontype);
|
|
let llfunctionreturntype =
|
|
::lib::llvm::llvm::LLVMGetReturnType(llfunctiontype);
|
|
if ::lib::llvm::llvm::LLVMGetTypeKind(llfunctionreturntype) ==
|
|
::lib::llvm::Void {
|
|
// XXX: This might be wrong if there are any functions for which
|
|
// the C ABI specifies a void output pointer and the Rust ABI
|
|
// does not.
|
|
RetVoid(return_context);
|
|
} else {
|
|
// Cast if we have to...
|
|
// XXX: This is ugly.
|
|
let llretptr = BitCast(return_context,
|
|
fcx.llretptr.get(),
|
|
T_ptr(llfunctionreturntype));
|
|
Ret(return_context, Load(return_context, llretptr));
|
|
}
|
|
}
|
|
}
|
|
|
|
// For each foreign function F, we generate a wrapper function W and a shim
|
|
// function S that all work together. The wrapper function W is the function
|
|
// that other rust code actually invokes. Its job is to marshall the
|
|
// arguments into a struct. It then uses a small bit of assembly to switch
|
|
// over to the C stack and invoke the shim function. The shim function S then
|
|
// unpacks the arguments from the struct and invokes the actual function F
|
|
// according to its specified calling convention.
|
|
//
|
|
// Example: Given a foreign c-stack function F(x: X, y: Y) -> Z,
|
|
// we generate a wrapper function W that looks like:
|
|
//
|
|
// void W(Z* dest, void *env, X x, Y y) {
|
|
// struct { X x; Y y; Z *z; } args = { x, y, z };
|
|
// call_on_c_stack_shim(S, &args);
|
|
// }
|
|
//
|
|
// The shim function S then looks something like:
|
|
//
|
|
// void S(struct { X x; Y y; Z *z; } *args) {
|
|
// *args->z = F(args->x, args->y);
|
|
// }
|
|
//
|
|
// However, if the return type of F is dynamically sized or of aggregate type,
|
|
// the shim function looks like:
|
|
//
|
|
// void S(struct { X x; Y y; Z *z; } *args) {
|
|
// F(args->z, args->x, args->y);
|
|
// }
|
|
//
|
|
// Note: on i386, the layout of the args struct is generally the same
|
|
// as the desired layout of the arguments on the C stack. Therefore,
|
|
// we could use upcall_alloc_c_stack() to allocate the `args`
|
|
// structure and switch the stack pointer appropriately to avoid a
|
|
// round of copies. (In fact, the shim function itself is
|
|
// unnecessary). We used to do this, in fact, and will perhaps do so
|
|
// in the future.
|
|
pub fn trans_foreign_mod(ccx: @CrateContext,
|
|
path: &ast_map::path,
|
|
foreign_mod: &ast::foreign_mod) {
|
|
let _icx = ccx.insn_ctxt("foreign::trans_foreign_mod");
|
|
|
|
let arch = ccx.sess.targ_cfg.arch;
|
|
let abi = match foreign_mod.abis.for_arch(arch) {
|
|
None => {
|
|
ccx.sess.fatal(
|
|
fmt!("No suitable ABI for target architecture \
|
|
in module %s",
|
|
ast_map::path_to_str(*path,
|
|
ccx.sess.intr())));
|
|
}
|
|
|
|
Some(abi) => abi,
|
|
};
|
|
|
|
for vec::each(foreign_mod.items) |&foreign_item| {
|
|
match foreign_item.node {
|
|
ast::foreign_item_fn(*) => {
|
|
let id = foreign_item.id;
|
|
match abi {
|
|
RustIntrinsic => {
|
|
// Intrinsics are emitted by monomorphic fn
|
|
}
|
|
|
|
Rust => {
|
|
// FIXME(#3678) Implement linking to foreign fns with Rust ABI
|
|
ccx.sess.unimpl(
|
|
fmt!("Foreign functions with Rust ABI"));
|
|
}
|
|
|
|
Stdcall => {
|
|
build_foreign_fn(ccx, id, foreign_item,
|
|
lib::llvm::X86StdcallCallConv);
|
|
}
|
|
|
|
Fastcall => {
|
|
build_foreign_fn(ccx, id, foreign_item,
|
|
lib::llvm::X86FastcallCallConv);
|
|
}
|
|
|
|
Cdecl => {
|
|
// FIXME(#3678) should really be more specific
|
|
build_foreign_fn(ccx, id, foreign_item,
|
|
lib::llvm::CCallConv);
|
|
}
|
|
|
|
Aapcs => {
|
|
// FIXME(#3678) should really be more specific
|
|
build_foreign_fn(ccx, id, foreign_item,
|
|
lib::llvm::CCallConv);
|
|
}
|
|
|
|
C => {
|
|
build_foreign_fn(ccx, id, foreign_item,
|
|
lib::llvm::CCallConv);
|
|
}
|
|
}
|
|
}
|
|
ast::foreign_item_const(*) => {
|
|
let ident = ccx.sess.parse_sess.interner.get(
|
|
foreign_item.ident);
|
|
ccx.item_symbols.insert(foreign_item.id, copy *ident);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn build_foreign_fn(ccx: @CrateContext,
|
|
id: ast::node_id,
|
|
foreign_item: @ast::foreign_item,
|
|
cc: lib::llvm::CallConv) {
|
|
let llwrapfn = get_item_val(ccx, id);
|
|
let tys = shim_types(ccx, id);
|
|
if attr::attrs_contains_name(foreign_item.attrs, "rust_stack") {
|
|
build_direct_fn(ccx, llwrapfn, foreign_item,
|
|
&tys, cc);
|
|
} else if attr::attrs_contains_name(foreign_item.attrs, "fast_ffi") {
|
|
build_fast_ffi_fn(ccx, llwrapfn, foreign_item, &tys, cc);
|
|
} else {
|
|
let llshimfn = build_shim_fn(ccx, foreign_item, &tys, cc);
|
|
build_wrap_fn(ccx, &tys, llshimfn, llwrapfn);
|
|
}
|
|
}
|
|
|
|
fn build_shim_fn(ccx: @CrateContext,
|
|
foreign_item: @ast::foreign_item,
|
|
tys: &ShimTypes,
|
|
cc: lib::llvm::CallConv)
|
|
-> ValueRef {
|
|
/*!
|
|
*
|
|
* Build S, from comment above:
|
|
*
|
|
* void S(struct { X x; Y y; Z *z; } *args) {
|
|
* F(args->z, args->x, args->y);
|
|
* }
|
|
*/
|
|
|
|
let _icx = ccx.insn_ctxt("foreign::build_shim_fn");
|
|
|
|
fn build_args(bcx: block, tys: &ShimTypes, llargbundle: ValueRef)
|
|
-> ~[ValueRef] {
|
|
let _icx = bcx.insn_ctxt("foreign::shim::build_args");
|
|
tys.fn_ty.build_shim_args(bcx, tys.llsig.llarg_tys, llargbundle)
|
|
}
|
|
|
|
fn build_ret(bcx: block,
|
|
tys: &ShimTypes,
|
|
llargbundle: ValueRef,
|
|
llretval: ValueRef) {
|
|
let _icx = bcx.insn_ctxt("foreign::shim::build_ret");
|
|
tys.fn_ty.build_shim_ret(bcx,
|
|
tys.llsig.llarg_tys,
|
|
tys.ret_def,
|
|
llargbundle,
|
|
llretval);
|
|
build_return(bcx);
|
|
}
|
|
|
|
let lname = link_name(ccx, foreign_item);
|
|
let llbasefn = base_fn(ccx, *lname, tys, cc);
|
|
// Name the shim function
|
|
let shim_name = *lname + ~"__c_stack_shim";
|
|
build_shim_fn_(ccx,
|
|
shim_name,
|
|
llbasefn,
|
|
tys,
|
|
cc,
|
|
build_args,
|
|
build_ret)
|
|
}
|
|
|
|
fn base_fn(ccx: @CrateContext,
|
|
lname: &str,
|
|
tys: &ShimTypes,
|
|
cc: lib::llvm::CallConv)
|
|
-> ValueRef {
|
|
// Declare the "prototype" for the base function F:
|
|
do tys.fn_ty.decl_fn |fnty| {
|
|
decl_fn(ccx.llmod, lname, cc, fnty)
|
|
}
|
|
}
|
|
|
|
// FIXME (#2535): this is very shaky and probably gets ABIs wrong all
|
|
// over the place
|
|
fn build_direct_fn(ccx: @CrateContext,
|
|
decl: ValueRef,
|
|
item: @ast::foreign_item,
|
|
tys: &ShimTypes,
|
|
cc: lib::llvm::CallConv) {
|
|
debug!("build_direct_fn(%s)", *link_name(ccx, item));
|
|
|
|
let fcx = new_fn_ctxt(ccx, ~[], decl, tys.fn_sig.output, None);
|
|
let bcx = top_scope_block(fcx, None), lltop = bcx.llbb;
|
|
let llbasefn = base_fn(ccx, *link_name(ccx, item), tys, cc);
|
|
let ty = ty::lookup_item_type(ccx.tcx,
|
|
ast_util::local_def(item.id)).ty;
|
|
let args = vec::from_fn(ty::ty_fn_args(ty).len(), |i| {
|
|
get_param(decl, i + first_real_arg)
|
|
});
|
|
let retval = Call(bcx, llbasefn, args);
|
|
let ret_ty = ty::ty_fn_ret(ty);
|
|
if !ty::type_is_nil(ret_ty) && !ty::type_is_bot(ret_ty) {
|
|
Store(bcx, retval, fcx.llretptr.get());
|
|
}
|
|
build_return(bcx);
|
|
finish_fn(fcx, lltop);
|
|
}
|
|
|
|
// FIXME (#2535): this is very shaky and probably gets ABIs wrong all
|
|
// over the place
|
|
fn build_fast_ffi_fn(ccx: @CrateContext,
|
|
decl: ValueRef,
|
|
item: @ast::foreign_item,
|
|
tys: &ShimTypes,
|
|
cc: lib::llvm::CallConv) {
|
|
debug!("build_fast_ffi_fn(%s)", *link_name(ccx, item));
|
|
|
|
let fcx = new_fn_ctxt(ccx, ~[], decl, tys.fn_sig.output, None);
|
|
let bcx = top_scope_block(fcx, None), lltop = bcx.llbb;
|
|
let llbasefn = base_fn(ccx, *link_name(ccx, item), tys, cc);
|
|
set_no_inline(fcx.llfn);
|
|
set_fixed_stack_segment(fcx.llfn);
|
|
let ty = ty::lookup_item_type(ccx.tcx,
|
|
ast_util::local_def(item.id)).ty;
|
|
let args = vec::from_fn(ty::ty_fn_args(ty).len(), |i| {
|
|
get_param(decl, i + first_real_arg)
|
|
});
|
|
let retval = Call(bcx, llbasefn, args);
|
|
let ret_ty = ty::ty_fn_ret(ty);
|
|
if !ty::type_is_nil(ret_ty) && !ty::type_is_bot(ret_ty) {
|
|
Store(bcx, retval, fcx.llretptr.get());
|
|
}
|
|
build_return(bcx);
|
|
finish_fn(fcx, lltop);
|
|
}
|
|
|
|
fn build_wrap_fn(ccx: @CrateContext,
|
|
tys: &ShimTypes,
|
|
llshimfn: ValueRef,
|
|
llwrapfn: ValueRef) {
|
|
/*!
|
|
*
|
|
* Build W, from comment above:
|
|
*
|
|
* void W(Z* dest, void *env, X x, Y y) {
|
|
* struct { X x; Y y; Z *z; } args = { x, y, z };
|
|
* call_on_c_stack_shim(S, &args);
|
|
* }
|
|
*
|
|
* One thing we have to be very careful of is to
|
|
* account for the Rust modes.
|
|
*/
|
|
|
|
let _icx = ccx.insn_ctxt("foreign::build_wrap_fn");
|
|
|
|
build_wrap_fn_(ccx,
|
|
tys,
|
|
llshimfn,
|
|
llwrapfn,
|
|
ccx.upcalls.call_shim_on_c_stack,
|
|
false,
|
|
build_args,
|
|
build_ret);
|
|
|
|
fn build_args(bcx: block,
|
|
tys: &ShimTypes,
|
|
llwrapfn: ValueRef,
|
|
llargbundle: ValueRef) {
|
|
let _icx = bcx.insn_ctxt("foreign::wrap::build_args");
|
|
let ccx = bcx.ccx();
|
|
let n = vec::len(tys.llsig.llarg_tys);
|
|
let implicit_args = first_real_arg; // return + env
|
|
for uint::range(0, n) |i| {
|
|
let mut llargval = get_param(llwrapfn, i + implicit_args);
|
|
|
|
// In some cases, Rust will pass a pointer which the
|
|
// native C type doesn't have. In that case, just
|
|
// load the value from the pointer.
|
|
if type_of::arg_is_indirect(ccx, &tys.fn_sig.inputs[i]) {
|
|
llargval = Load(bcx, llargval);
|
|
}
|
|
|
|
store_inbounds(bcx, llargval, llargbundle, ~[0u, i]);
|
|
}
|
|
let llretptr = bcx.fcx.llretptr.get();
|
|
store_inbounds(bcx, llretptr, llargbundle, ~[0u, n]);
|
|
}
|
|
|
|
fn build_ret(bcx: block,
|
|
shim_types: &ShimTypes,
|
|
llargbundle: ValueRef) {
|
|
let _icx = bcx.insn_ctxt("foreign::wrap::build_ret");
|
|
let arg_count = shim_types.fn_sig.inputs.len();
|
|
let llretptr = load_inbounds(bcx, llargbundle, ~[0, arg_count]);
|
|
Store(bcx, Load(bcx, llretptr), bcx.fcx.llretptr.get());
|
|
build_return(bcx);
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn trans_intrinsic(ccx: @CrateContext,
|
|
decl: ValueRef,
|
|
item: @ast::foreign_item,
|
|
path: ast_map::path,
|
|
substs: @param_substs,
|
|
attributes: &[ast::attribute],
|
|
ref_id: Option<ast::node_id>) {
|
|
debug!("trans_intrinsic(item.ident=%s)", *ccx.sess.str_of(item.ident));
|
|
|
|
let output_type = ty::ty_fn_ret(ty::node_id_to_type(ccx.tcx, item.id));
|
|
|
|
// XXX: Bad copy.
|
|
let fcx = new_fn_ctxt_w_id(ccx,
|
|
path,
|
|
decl,
|
|
item.id,
|
|
output_type,
|
|
None,
|
|
Some(copy substs),
|
|
Some(item.span));
|
|
|
|
// Set the fixed stack segment flag if necessary.
|
|
if attr::attrs_contains_name(attributes, "fixed_stack_segment") {
|
|
set_fixed_stack_segment(fcx.llfn);
|
|
}
|
|
|
|
let mut bcx = top_scope_block(fcx, None);
|
|
let lltop = bcx.llbb;
|
|
match *ccx.sess.str_of(item.ident) {
|
|
~"atomic_cxchg" => {
|
|
let old = AtomicCmpXchg(bcx,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
get_param(decl, first_real_arg + 2u),
|
|
SequentiallyConsistent);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"atomic_cxchg_acq" => {
|
|
let old = AtomicCmpXchg(bcx,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
get_param(decl, first_real_arg + 2u),
|
|
Acquire);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"atomic_cxchg_rel" => {
|
|
let old = AtomicCmpXchg(bcx,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
get_param(decl, first_real_arg + 2u),
|
|
Release);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"atomic_xchg" => {
|
|
let old = AtomicRMW(bcx, Xchg,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
SequentiallyConsistent);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"atomic_xchg_acq" => {
|
|
let old = AtomicRMW(bcx, Xchg,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
Acquire);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"atomic_xchg_rel" => {
|
|
let old = AtomicRMW(bcx, Xchg,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
Release);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"atomic_xadd" => {
|
|
let old = AtomicRMW(bcx, lib::llvm::Add,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
SequentiallyConsistent);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"atomic_xadd_acq" => {
|
|
let old = AtomicRMW(bcx, lib::llvm::Add,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
Acquire);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"atomic_xadd_rel" => {
|
|
let old = AtomicRMW(bcx, lib::llvm::Add,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
Release);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"atomic_xsub" => {
|
|
let old = AtomicRMW(bcx, lib::llvm::Sub,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
SequentiallyConsistent);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"atomic_xsub_acq" => {
|
|
let old = AtomicRMW(bcx, lib::llvm::Sub,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
Acquire);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"atomic_xsub_rel" => {
|
|
let old = AtomicRMW(bcx, lib::llvm::Sub,
|
|
get_param(decl, first_real_arg),
|
|
get_param(decl, first_real_arg + 1u),
|
|
Release);
|
|
Store(bcx, old, fcx.llretptr.get());
|
|
}
|
|
~"size_of" => {
|
|
let tp_ty = substs.tys[0];
|
|
let lltp_ty = type_of::type_of(ccx, tp_ty);
|
|
Store(bcx, C_uint(ccx, machine::llsize_of_real(ccx, lltp_ty)),
|
|
fcx.llretptr.get());
|
|
}
|
|
~"move_val" => {
|
|
// Create a datum reflecting the value being moved:
|
|
//
|
|
// - the datum will be by ref if the value is non-immediate;
|
|
//
|
|
// - the datum has a RevokeClean source because, that way,
|
|
// the `move_to()` method does not feel compelled to
|
|
// zero out the memory where the datum resides. Zeroing
|
|
// is not necessary since, for intrinsics, there is no
|
|
// cleanup to concern ourselves with.
|
|
let tp_ty = substs.tys[0];
|
|
let mode = appropriate_mode(tp_ty);
|
|
let src = Datum {val: get_param(decl, first_real_arg + 1u),
|
|
ty: tp_ty, mode: mode, source: RevokeClean};
|
|
bcx = src.move_to(bcx, DROP_EXISTING,
|
|
get_param(decl, first_real_arg));
|
|
}
|
|
~"move_val_init" => {
|
|
// See comments for `"move_val"`.
|
|
let tp_ty = substs.tys[0];
|
|
let mode = appropriate_mode(tp_ty);
|
|
let src = Datum {val: get_param(decl, first_real_arg + 1u),
|
|
ty: tp_ty, mode: mode, source: RevokeClean};
|
|
bcx = src.move_to(bcx, INIT, get_param(decl, first_real_arg));
|
|
}
|
|
~"min_align_of" => {
|
|
let tp_ty = substs.tys[0];
|
|
let lltp_ty = type_of::type_of(ccx, tp_ty);
|
|
Store(bcx, C_uint(ccx, machine::llalign_of_min(ccx, lltp_ty)),
|
|
fcx.llretptr.get());
|
|
}
|
|
~"pref_align_of"=> {
|
|
let tp_ty = substs.tys[0];
|
|
let lltp_ty = type_of::type_of(ccx, tp_ty);
|
|
Store(bcx, C_uint(ccx, machine::llalign_of_pref(ccx, lltp_ty)),
|
|
fcx.llretptr.get());
|
|
}
|
|
~"get_tydesc" => {
|
|
let tp_ty = substs.tys[0];
|
|
let static_ti = get_tydesc(ccx, tp_ty);
|
|
glue::lazily_emit_all_tydesc_glue(ccx, static_ti);
|
|
|
|
// FIXME (#3727): change this to T_ptr(ccx.tydesc_ty) when the
|
|
// core::sys copy of the get_tydesc interface dies off.
|
|
let td = PointerCast(bcx, static_ti.tydesc, T_ptr(T_nil()));
|
|
Store(bcx, td, fcx.llretptr.get());
|
|
}
|
|
~"init" => {
|
|
let tp_ty = substs.tys[0];
|
|
let lltp_ty = type_of::type_of(ccx, tp_ty);
|
|
if !ty::type_is_nil(tp_ty) {
|
|
Store(bcx, C_null(lltp_ty), fcx.llretptr.get());
|
|
}
|
|
}
|
|
~"forget" => {}
|
|
~"transmute" => {
|
|
let (in_type, out_type) = (substs.tys[0], substs.tys[1]);
|
|
let llintype = type_of::type_of(ccx, in_type);
|
|
let llouttype = type_of::type_of(ccx, out_type);
|
|
|
|
let in_type_size = machine::llbitsize_of_real(ccx, llintype);
|
|
let out_type_size = machine::llbitsize_of_real(ccx, llouttype);
|
|
if in_type_size != out_type_size {
|
|
let sp = match ccx.tcx.items.get_copy(&ref_id.get()) {
|
|
ast_map::node_expr(e) => e.span,
|
|
_ => fail!(~"transmute has non-expr arg"),
|
|
};
|
|
let pluralize = |n| if 1u == n { "" } else { "s" };
|
|
ccx.sess.span_fatal(sp,
|
|
fmt!("transmute called on types with \
|
|
different sizes: %s (%u bit%s) to \
|
|
%s (%u bit%s)",
|
|
ty_to_str(ccx.tcx, in_type),
|
|
in_type_size,
|
|
pluralize(in_type_size),
|
|
ty_to_str(ccx.tcx, out_type),
|
|
out_type_size,
|
|
pluralize(out_type_size)));
|
|
}
|
|
|
|
if !ty::type_is_nil(out_type) {
|
|
// NB: Do not use a Load and Store here. This causes massive
|
|
// code bloat when `transmute` is used on large structural
|
|
// types.
|
|
let lldestptr = fcx.llretptr.get();
|
|
let lldestptr = PointerCast(bcx, lldestptr, T_ptr(T_i8()));
|
|
|
|
let llsrcval = get_param(decl, first_real_arg);
|
|
let llsrcptr = if ty::type_is_immediate(in_type) {
|
|
let llsrcptr = alloca(bcx, llintype);
|
|
Store(bcx, llsrcval, llsrcptr);
|
|
llsrcptr
|
|
} else {
|
|
llsrcval
|
|
};
|
|
let llsrcptr = PointerCast(bcx, llsrcptr, T_ptr(T_i8()));
|
|
|
|
let llsize = llsize_of(ccx, llintype);
|
|
call_memcpy(bcx, lldestptr, llsrcptr, llsize);
|
|
}
|
|
}
|
|
~"needs_drop" => {
|
|
let tp_ty = substs.tys[0];
|
|
Store(bcx,
|
|
C_bool(ty::type_needs_drop(ccx.tcx, tp_ty)),
|
|
fcx.llretptr.get());
|
|
}
|
|
~"visit_tydesc" => {
|
|
let td = get_param(decl, first_real_arg);
|
|
let visitor = get_param(decl, first_real_arg + 1u);
|
|
//let llvisitorptr = alloca(bcx, val_ty(visitor));
|
|
//Store(bcx, visitor, llvisitorptr);
|
|
let td = PointerCast(bcx, td, T_ptr(ccx.tydesc_type));
|
|
glue::call_tydesc_glue_full(bcx,
|
|
visitor,
|
|
td,
|
|
abi::tydesc_field_visit_glue,
|
|
None);
|
|
}
|
|
~"frame_address" => {
|
|
let frameaddress = *ccx.intrinsics.get(&~"llvm.frameaddress");
|
|
let frameaddress_val = Call(bcx, frameaddress, ~[C_i32(0i32)]);
|
|
let star_u8 = ty::mk_imm_ptr(
|
|
bcx.tcx(),
|
|
ty::mk_mach_uint(ast::ty_u8));
|
|
let fty = ty::mk_closure(bcx.tcx(), ty::ClosureTy {
|
|
purity: ast::impure_fn,
|
|
sigil: ast::BorrowedSigil,
|
|
onceness: ast::Many,
|
|
region: ty::re_bound(ty::br_anon(0)),
|
|
sig: FnSig {
|
|
bound_lifetime_names: opt_vec::Empty,
|
|
inputs: ~[ arg { ty: star_u8 } ],
|
|
output: ty::mk_nil()
|
|
}
|
|
});
|
|
let datum = Datum {val: get_param(decl, first_real_arg),
|
|
mode: ByRef, ty: fty, source: ZeroMem};
|
|
let arg_vals = ~[frameaddress_val];
|
|
bcx = trans_call_inner(
|
|
bcx, None, fty, ty::mk_nil(),
|
|
|bcx| Callee {bcx: bcx, data: Closure(datum)},
|
|
ArgVals(arg_vals), Ignore, DontAutorefArg);
|
|
}
|
|
~"morestack_addr" => {
|
|
// XXX This is a hack to grab the address of this particular
|
|
// native function. There should be a general in-language
|
|
// way to do this
|
|
let llfty = type_of_fn(bcx.ccx(), ~[], ty::mk_nil());
|
|
let morestack_addr = decl_cdecl_fn(
|
|
bcx.ccx().llmod, ~"__morestack", llfty);
|
|
let morestack_addr = PointerCast(bcx, morestack_addr,
|
|
T_ptr(T_nil()));
|
|
Store(bcx, morestack_addr, fcx.llretptr.get());
|
|
}
|
|
~"memmove32" => {
|
|
let dst_ptr = get_param(decl, first_real_arg);
|
|
let src_ptr = get_param(decl, first_real_arg + 1);
|
|
let size = get_param(decl, first_real_arg + 2);
|
|
let align = C_i32(1);
|
|
let volatile = C_i1(false);
|
|
let llfn = *bcx.ccx().intrinsics.get(
|
|
&~"llvm.memmove.p0i8.p0i8.i32");
|
|
Call(bcx, llfn, ~[dst_ptr, src_ptr, size, align, volatile]);
|
|
}
|
|
~"memmove64" => {
|
|
let dst_ptr = get_param(decl, first_real_arg);
|
|
let src_ptr = get_param(decl, first_real_arg + 1);
|
|
let size = get_param(decl, first_real_arg + 2);
|
|
let align = C_i32(1);
|
|
let volatile = C_i1(false);
|
|
let llfn = *bcx.ccx().intrinsics.get(
|
|
&~"llvm.memmove.p0i8.p0i8.i64");
|
|
Call(bcx, llfn, ~[dst_ptr, src_ptr, size, align, volatile]);
|
|
}
|
|
~"sqrtf32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let sqrtf = *ccx.intrinsics.get(&~"llvm.sqrt.f32");
|
|
Store(bcx, Call(bcx, sqrtf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"sqrtf64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let sqrtf = *ccx.intrinsics.get(&~"llvm.sqrt.f64");
|
|
Store(bcx, Call(bcx, sqrtf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"powif32" => {
|
|
let a = get_param(decl, first_real_arg);
|
|
let x = get_param(decl, first_real_arg + 1u);
|
|
let powif = *ccx.intrinsics.get(&~"llvm.powi.f32");
|
|
Store(bcx, Call(bcx, powif, ~[a, x]), fcx.llretptr.get());
|
|
}
|
|
~"powif64" => {
|
|
let a = get_param(decl, first_real_arg);
|
|
let x = get_param(decl, first_real_arg + 1u);
|
|
let powif = *ccx.intrinsics.get(&~"llvm.powi.f64");
|
|
Store(bcx, Call(bcx, powif, ~[a, x]), fcx.llretptr.get());
|
|
}
|
|
~"sinf32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let sinf = *ccx.intrinsics.get(&~"llvm.sin.f32");
|
|
Store(bcx, Call(bcx, sinf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"sinf64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let sinf = *ccx.intrinsics.get(&~"llvm.sin.f64");
|
|
Store(bcx, Call(bcx, sinf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"cosf32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let cosf = *ccx.intrinsics.get(&~"llvm.cos.f32");
|
|
Store(bcx, Call(bcx, cosf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"cosf64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let cosf = *ccx.intrinsics.get(&~"llvm.cos.f64");
|
|
Store(bcx, Call(bcx, cosf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"powf32" => {
|
|
let a = get_param(decl, first_real_arg);
|
|
let x = get_param(decl, first_real_arg + 1u);
|
|
let powf = *ccx.intrinsics.get(&~"llvm.pow.f32");
|
|
Store(bcx, Call(bcx, powf, ~[a, x]), fcx.llretptr.get());
|
|
}
|
|
~"powf64" => {
|
|
let a = get_param(decl, first_real_arg);
|
|
let x = get_param(decl, first_real_arg + 1u);
|
|
let powf = *ccx.intrinsics.get(&~"llvm.pow.f64");
|
|
Store(bcx, Call(bcx, powf, ~[a, x]), fcx.llretptr.get());
|
|
}
|
|
~"expf32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let expf = *ccx.intrinsics.get(&~"llvm.exp.f32");
|
|
Store(bcx, Call(bcx, expf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"expf64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let expf = *ccx.intrinsics.get(&~"llvm.exp.f64");
|
|
Store(bcx, Call(bcx, expf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"exp2f32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let exp2f = *ccx.intrinsics.get(&~"llvm.exp2.f32");
|
|
Store(bcx, Call(bcx, exp2f, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"exp2f64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let exp2f = *ccx.intrinsics.get(&~"llvm.exp2.f64");
|
|
Store(bcx, Call(bcx, exp2f, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"logf32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let logf = *ccx.intrinsics.get(&~"llvm.log.f32");
|
|
Store(bcx, Call(bcx, logf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"logf64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let logf = *ccx.intrinsics.get(&~"llvm.log.f64");
|
|
Store(bcx, Call(bcx, logf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"log10f32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let log10f = *ccx.intrinsics.get(&~"llvm.log10.f32");
|
|
Store(bcx, Call(bcx, log10f, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"log10f64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let log10f = *ccx.intrinsics.get(&~"llvm.log10.f64");
|
|
Store(bcx, Call(bcx, log10f, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"log2f32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let log2f = *ccx.intrinsics.get(&~"llvm.log2.f32");
|
|
Store(bcx, Call(bcx, log2f, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"log2f64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let log2f = *ccx.intrinsics.get(&~"llvm.log2.f64");
|
|
Store(bcx, Call(bcx, log2f, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"fmaf32" => {
|
|
let a = get_param(decl, first_real_arg);
|
|
let b = get_param(decl, first_real_arg + 1u);
|
|
let c = get_param(decl, first_real_arg + 2u);
|
|
let fmaf = *ccx.intrinsics.get(&~"llvm.fma.f32");
|
|
Store(bcx, Call(bcx, fmaf, ~[a, b, c]), fcx.llretptr.get());
|
|
}
|
|
~"fmaf64" => {
|
|
let a = get_param(decl, first_real_arg);
|
|
let b = get_param(decl, first_real_arg + 1u);
|
|
let c = get_param(decl, first_real_arg + 2u);
|
|
let fmaf = *ccx.intrinsics.get(&~"llvm.fma.f64");
|
|
Store(bcx, Call(bcx, fmaf, ~[a, b, c]), fcx.llretptr.get());
|
|
}
|
|
~"fabsf32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let fabsf = *ccx.intrinsics.get(&~"llvm.fabs.f32");
|
|
Store(bcx, Call(bcx, fabsf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"fabsf64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let fabsf = *ccx.intrinsics.get(&~"llvm.fabs.f64");
|
|
Store(bcx, Call(bcx, fabsf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"floorf32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let floorf = *ccx.intrinsics.get(&~"llvm.floor.f32");
|
|
Store(bcx, Call(bcx, floorf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"floorf64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let floorf = *ccx.intrinsics.get(&~"llvm.floor.f64");
|
|
Store(bcx, Call(bcx, floorf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"ceilf32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let ceilf = *ccx.intrinsics.get(&~"llvm.ceil.f32");
|
|
Store(bcx, Call(bcx, ceilf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"ceilf64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let ceilf = *ccx.intrinsics.get(&~"llvm.ceil.f64");
|
|
Store(bcx, Call(bcx, ceilf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"truncf32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let truncf = *ccx.intrinsics.get(&~"llvm.trunc.f32");
|
|
Store(bcx, Call(bcx, truncf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"truncf64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let truncf = *ccx.intrinsics.get(&~"llvm.trunc.f64");
|
|
Store(bcx, Call(bcx, truncf, ~[x]), fcx.llretptr.get());
|
|
}
|
|
~"ctpop8" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let ctpop = *ccx.intrinsics.get(&~"llvm.ctpop.i8");
|
|
Store(bcx, Call(bcx, ctpop, ~[x]), fcx.llretptr.get())
|
|
}
|
|
~"ctpop16" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let ctpop = *ccx.intrinsics.get(&~"llvm.ctpop.i16");
|
|
Store(bcx, Call(bcx, ctpop, ~[x]), fcx.llretptr.get())
|
|
}
|
|
~"ctpop32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let ctpop = *ccx.intrinsics.get(&~"llvm.ctpop.i32");
|
|
Store(bcx, Call(bcx, ctpop, ~[x]), fcx.llretptr.get())
|
|
}
|
|
~"ctpop64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let ctpop = *ccx.intrinsics.get(&~"llvm.ctpop.i64");
|
|
Store(bcx, Call(bcx, ctpop, ~[x]), fcx.llretptr.get())
|
|
}
|
|
~"ctlz8" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let y = C_i1(false);
|
|
let ctlz = *ccx.intrinsics.get(&~"llvm.ctlz.i8");
|
|
Store(bcx, Call(bcx, ctlz, ~[x, y]), fcx.llretptr.get())
|
|
}
|
|
~"ctlz16" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let y = C_i1(false);
|
|
let ctlz = *ccx.intrinsics.get(&~"llvm.ctlz.i16");
|
|
Store(bcx, Call(bcx, ctlz, ~[x, y]), fcx.llretptr.get())
|
|
}
|
|
~"ctlz32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let y = C_i1(false);
|
|
let ctlz = *ccx.intrinsics.get(&~"llvm.ctlz.i32");
|
|
Store(bcx, Call(bcx, ctlz, ~[x, y]), fcx.llretptr.get())
|
|
}
|
|
~"ctlz64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let y = C_i1(false);
|
|
let ctlz = *ccx.intrinsics.get(&~"llvm.ctlz.i64");
|
|
Store(bcx, Call(bcx, ctlz, ~[x, y]), fcx.llretptr.get())
|
|
}
|
|
~"cttz8" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let y = C_i1(false);
|
|
let cttz = *ccx.intrinsics.get(&~"llvm.cttz.i8");
|
|
Store(bcx, Call(bcx, cttz, ~[x, y]), fcx.llretptr.get())
|
|
}
|
|
~"cttz16" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let y = C_i1(false);
|
|
let cttz = *ccx.intrinsics.get(&~"llvm.cttz.i16");
|
|
Store(bcx, Call(bcx, cttz, ~[x, y]), fcx.llretptr.get())
|
|
}
|
|
~"cttz32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let y = C_i1(false);
|
|
let cttz = *ccx.intrinsics.get(&~"llvm.cttz.i32");
|
|
Store(bcx, Call(bcx, cttz, ~[x, y]), fcx.llretptr.get())
|
|
}
|
|
~"cttz64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let y = C_i1(false);
|
|
let cttz = *ccx.intrinsics.get(&~"llvm.cttz.i64");
|
|
Store(bcx, Call(bcx, cttz, ~[x, y]), fcx.llretptr.get())
|
|
}
|
|
~"bswap16" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let cttz = *ccx.intrinsics.get(&~"llvm.bswap.i16");
|
|
Store(bcx, Call(bcx, cttz, ~[x]), fcx.llretptr.get())
|
|
}
|
|
~"bswap32" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let cttz = *ccx.intrinsics.get(&~"llvm.bswap.i32");
|
|
Store(bcx, Call(bcx, cttz, ~[x]), fcx.llretptr.get())
|
|
}
|
|
~"bswap64" => {
|
|
let x = get_param(decl, first_real_arg);
|
|
let cttz = *ccx.intrinsics.get(&~"llvm.bswap.i64");
|
|
Store(bcx, Call(bcx, cttz, ~[x]), fcx.llretptr.get())
|
|
}
|
|
_ => {
|
|
// Could we make this an enum rather than a string? does it get
|
|
// checked earlier?
|
|
ccx.sess.span_bug(item.span, "unknown intrinsic");
|
|
}
|
|
}
|
|
build_return(bcx);
|
|
finish_fn(fcx, lltop);
|
|
}
|
|
|
|
/**
|
|
* Translates a "crust" fn, meaning a Rust fn that can be called
|
|
* from C code. In this case, we have to perform some adaptation
|
|
* to (1) switch back to the Rust stack and (2) adapt the C calling
|
|
* convention to our own.
|
|
*
|
|
* Example: Given a crust fn F(x: X, y: Y) -> Z, we generate a
|
|
* Rust function R as normal:
|
|
*
|
|
* void R(Z* dest, void *env, X x, Y y) {...}
|
|
*
|
|
* and then we generate a wrapper function W that looks like:
|
|
*
|
|
* Z W(X x, Y y) {
|
|
* struct { X x; Y y; Z *z; } args = { x, y, z };
|
|
* call_on_c_stack_shim(S, &args);
|
|
* }
|
|
*
|
|
* Note that the wrapper follows the foreign (typically "C") ABI.
|
|
* The wrapper is the actual "value" of the foreign fn. Finally,
|
|
* we generate a shim function S that looks like:
|
|
*
|
|
* void S(struct { X x; Y y; Z *z; } *args) {
|
|
* R(args->z, NULL, args->x, args->y);
|
|
* }
|
|
*/
|
|
pub fn trans_foreign_fn(ccx: @CrateContext,
|
|
path: ast_map::path,
|
|
decl: &ast::fn_decl,
|
|
body: &ast::blk,
|
|
llwrapfn: ValueRef,
|
|
id: ast::node_id) {
|
|
let _icx = ccx.insn_ctxt("foreign::build_foreign_fn");
|
|
|
|
fn build_rust_fn(ccx: @CrateContext,
|
|
path: ast_map::path,
|
|
decl: &ast::fn_decl,
|
|
body: &ast::blk,
|
|
id: ast::node_id)
|
|
-> ValueRef {
|
|
let _icx = ccx.insn_ctxt("foreign::foreign::build_rust_fn");
|
|
let t = ty::node_id_to_type(ccx.tcx, id);
|
|
// XXX: Bad copy.
|
|
let ps = link::mangle_internal_name_by_path(
|
|
ccx, vec::append_one(copy path, ast_map::path_name(
|
|
special_idents::clownshoe_abi
|
|
)));
|
|
let llty = type_of_fn_from_ty(ccx, t);
|
|
let llfndecl = decl_internal_cdecl_fn(ccx.llmod, ps, llty);
|
|
trans_fn(ccx,
|
|
path,
|
|
decl,
|
|
body,
|
|
llfndecl,
|
|
no_self,
|
|
None,
|
|
id,
|
|
None,
|
|
[]);
|
|
return llfndecl;
|
|
}
|
|
|
|
fn build_shim_fn(ccx: @CrateContext,
|
|
path: ast_map::path,
|
|
llrustfn: ValueRef,
|
|
tys: &ShimTypes)
|
|
-> ValueRef {
|
|
/*!
|
|
*
|
|
* Generate the shim S:
|
|
*
|
|
* void S(struct { X x; Y y; Z *z; } *args) {
|
|
* R(args->z, NULL, &args->x, args->y);
|
|
* }
|
|
*
|
|
* One complication is that we must adapt to the Rust
|
|
* calling convention, which introduces indirection
|
|
* in some cases. To demonstrate this, I wrote one of the
|
|
* entries above as `&args->x`, because presumably `X` is
|
|
* one of those types that is passed by pointer in Rust.
|
|
*/
|
|
|
|
let _icx = ccx.insn_ctxt("foreign::foreign::build_shim_fn");
|
|
|
|
fn build_args(bcx: block, tys: &ShimTypes, llargbundle: ValueRef)
|
|
-> ~[ValueRef] {
|
|
let _icx = bcx.insn_ctxt("foreign::extern::shim::build_args");
|
|
let ccx = bcx.ccx();
|
|
let mut llargvals = ~[];
|
|
let mut i = 0u;
|
|
let n = tys.fn_sig.inputs.len();
|
|
|
|
if !ty::type_is_immediate(tys.fn_sig.output) {
|
|
let llretptr = load_inbounds(bcx, llargbundle, ~[0u, n]);
|
|
llargvals.push(llretptr);
|
|
} else {
|
|
llargvals.push(C_null(T_ptr(T_i8())));
|
|
}
|
|
|
|
let llenvptr = C_null(T_opaque_box_ptr(bcx.ccx()));
|
|
llargvals.push(llenvptr);
|
|
while i < n {
|
|
// Get a pointer to the argument:
|
|
let mut llargval = GEPi(bcx, llargbundle, [0u, i]);
|
|
|
|
if !type_of::arg_is_indirect(ccx, &tys.fn_sig.inputs[i]) {
|
|
// If Rust would pass this by value, load the value.
|
|
llargval = Load(bcx, llargval);
|
|
}
|
|
|
|
llargvals.push(llargval);
|
|
i += 1u;
|
|
}
|
|
return llargvals;
|
|
}
|
|
|
|
fn build_ret(bcx: block,
|
|
shim_types: &ShimTypes,
|
|
llargbundle: ValueRef,
|
|
llretval: ValueRef) {
|
|
if ty::type_is_immediate(shim_types.fn_sig.output) {
|
|
// Write the value into the argument bundle.
|
|
let arg_count = shim_types.fn_sig.inputs.len();
|
|
let llretptr = load_inbounds(bcx,
|
|
llargbundle,
|
|
~[0, arg_count]);
|
|
Store(bcx, llretval, llretptr);
|
|
} else {
|
|
// NB: The return pointer in the Rust ABI function is wired
|
|
// directly into the return slot in the shim struct.
|
|
}
|
|
|
|
build_return(bcx);
|
|
}
|
|
|
|
let shim_name = link::mangle_internal_name_by_path(
|
|
ccx,
|
|
vec::append_one(path, ast_map::path_name(
|
|
special_idents::clownshoe_stack_shim
|
|
)));
|
|
build_shim_fn_(ccx,
|
|
shim_name,
|
|
llrustfn,
|
|
tys,
|
|
lib::llvm::CCallConv,
|
|
build_args,
|
|
build_ret)
|
|
}
|
|
|
|
fn build_wrap_fn(ccx: @CrateContext,
|
|
llshimfn: ValueRef,
|
|
llwrapfn: ValueRef,
|
|
tys: &ShimTypes) {
|
|
/*!
|
|
*
|
|
* Generate the wrapper W:
|
|
*
|
|
* Z W(X x, Y y) {
|
|
* struct { X x; Y y; Z *z; } args = { x, y, z };
|
|
* call_on_c_stack_shim(S, &args);
|
|
* }
|
|
*/
|
|
|
|
let _icx = ccx.insn_ctxt("foreign::foreign::build_wrap_fn");
|
|
|
|
build_wrap_fn_(ccx,
|
|
tys,
|
|
llshimfn,
|
|
llwrapfn,
|
|
ccx.upcalls.call_shim_on_rust_stack,
|
|
true,
|
|
build_args,
|
|
build_ret);
|
|
|
|
fn build_args(bcx: block,
|
|
tys: &ShimTypes,
|
|
llwrapfn: ValueRef,
|
|
llargbundle: ValueRef) {
|
|
let _icx = bcx.insn_ctxt("foreign::foreign::wrap::build_args");
|
|
tys.fn_ty.build_wrap_args(bcx,
|
|
tys.llsig.llret_ty,
|
|
llwrapfn,
|
|
llargbundle);
|
|
}
|
|
|
|
fn build_ret(bcx: block, tys: &ShimTypes, llargbundle: ValueRef) {
|
|
let _icx = bcx.insn_ctxt("foreign::foreign::wrap::build_ret");
|
|
tys.fn_ty.build_wrap_ret(bcx, tys.llsig.llarg_tys, llargbundle);
|
|
build_return(bcx);
|
|
}
|
|
}
|
|
|
|
let tys = shim_types(ccx, id);
|
|
// The internal Rust ABI function - runs on the Rust stack
|
|
// XXX: Bad copy.
|
|
let llrustfn = build_rust_fn(ccx, copy path, decl, body, id);
|
|
// The internal shim function - runs on the Rust stack
|
|
let llshimfn = build_shim_fn(ccx, path, llrustfn, &tys);
|
|
// The foreign C function - runs on the C stack
|
|
build_wrap_fn(ccx, llshimfn, llwrapfn, &tys)
|
|
}
|
|
|
|
pub fn register_foreign_fn(ccx: @CrateContext,
|
|
sp: span,
|
|
path: ast_map::path,
|
|
node_id: ast::node_id,
|
|
attrs: &[ast::attribute])
|
|
-> ValueRef {
|
|
let _icx = ccx.insn_ctxt("foreign::register_foreign_fn");
|
|
|
|
let t = ty::node_id_to_type(ccx.tcx, node_id);
|
|
|
|
let tys = shim_types(ccx, node_id);
|
|
do tys.fn_ty.decl_fn |fnty| {
|
|
register_fn_fuller(ccx,
|
|
sp,
|
|
/*bad*/copy path,
|
|
node_id,
|
|
attrs,
|
|
t,
|
|
lib::llvm::CCallConv,
|
|
fnty)
|
|
}
|
|
}
|