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Fix crash(!) by using the *Rust fn type* not the extern fn type

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cc #3678
This commit is contained in:
Niko Matsakis 2013-08-19 21:28:31 -04:00
parent 4c75e92612
commit 94a084a4b4
1 changed files with 24 additions and 1 deletions
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25
src/librustc/middle/trans/foreign.rs
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@ -21,6 +21,7 @@
use middle::trans::build::*;
use middle::trans::builder::noname;
use middle::trans::common::*;
use middle::trans::llrepr::LlvmRepr;
use middle::trans::type_of::*;
use middle::trans::type_of;
use middle::ty;
@ -399,7 +400,29 @@ fn build_rust_fn(ccx: @mut CrateContext,
ccx, vec::append_one((*path).clone(), ast_map::path_name(
special_idents::clownshoe_abi
)));
let llty = type_of_fn_from_ty(ccx, t);
// Compute the LLVM type that the function would have if it
// were just a normal Rust function. This will be the type of
// the wrappee fn.
let llty = match ty::get(t).sty {
ty::ty_bare_fn(ref f) => {
assert!(!f.abis.is_rust() && !f.abis.is_intrinsic());
type_of_rust_fn(ccx, f.sig.inputs, f.sig.output)
}
_ => {
ccx.sess.bug(fmt!("build_rust_fn: extern fn %s has ty %s, \
expected a bare fn ty",
path.repr(tcx),
t.repr(tcx)));
}
};
debug!("build_rust_fn: path=%s id=%? t=%s llty=%s",
path.repr(tcx),
id,
t.repr(tcx),
llty.llrepr(ccx));
let llfndecl = base::decl_internal_cdecl_fn(ccx.llmod, ps, llty);
base::trans_fn(ccx,
(*path).clone(),