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rustc: Only declare each native function once. std.rc now links.

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This commit is contained in:
Patrick Walton 2011-03-19 17:33:46 -07:00
parent a1aad28690
commit 277d42f589
1 changed files with 15 additions and 1 deletions
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16
src/comp/middle/trans.rs
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@ -71,6 +71,7 @@ state type crate_ctxt = rec(session.session sess,
hashmap[str, ValueRef] upcalls,
hashmap[str, ValueRef] intrinsics,
hashmap[str, ValueRef] item_names,
hashmap[str, ValueRef] native_fns,
hashmap[ast.def_id, ValueRef] item_ids,
hashmap[ast.def_id, @ast.item] items,
hashmap[ast.def_id,
@ -5452,7 +5453,19 @@ fn decl_native_fn_and_pair(@crate_ctxt cx,
auto abi = ty.ty_fn_abi(fn_type);
auto llfnty = type_of_native_fn(cx, abi, ty.ty_fn_args(fn_type),
ty.ty_fn_ret(fn_type), num_ty_param);
auto function = decl_cdecl_fn(cx.llmod, name, llfnty);
// We can only declare a native function with a given name once; LLVM
// unhelpfully mangles the names if we try to multiply declare one.
auto function;
if (!cx.native_fns.contains_key(name)) {
function = decl_cdecl_fn(cx.llmod, name, llfnty);
cx.native_fns.insert(name, function);
} else {
// We support type-punning a native function by giving it different
// Rust types.
auto llorigfn = cx.native_fns.get(name);
function = bcx.build.PointerCast(llorigfn, T_ptr(llfnty));
}
let vec[ValueRef] call_args = vec();
auto arg_n = 3u;
@ -6200,6 +6213,7 @@ fn trans_crate(session.session sess, @ast.crate crate, str output,
upcalls = new_str_hash[ValueRef](),
intrinsics = intrinsics,
item_names = new_str_hash[ValueRef](),
native_fns = new_str_hash[ValueRef](),
item_ids = new_def_hash[ValueRef](),
items = new_def_hash[@ast.item](),
native_items = new_def_hash[@ast.native_item](),