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auto merge of #4823 : pcwalton/rust/enum-variant-discriminants, r=graydon

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r? @graydon
This commit is contained in:
bors 2013-02-07 04:02:51 -08:00
commit 82d7396333
2 changed files with 3 additions and 24 deletions
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21
src/librustc/middle/trans/base.rs
View File

@ -813,27 +813,6 @@ pub fn get_discrim_val(cx: @crate_ctxt, span: span, enum_did: ast::def_id,
}
}
pub fn lookup_discriminant(ccx: @crate_ctxt, vid: ast::def_id) -> ValueRef {
unsafe {
let _icx = ccx.insn_ctxt("lookup_discriminant");
match ccx.discrims.find(&vid) {
None => {
// It's an external discriminant that we haven't seen yet.
assert (vid.crate != ast::local_crate);
let sym = csearch::get_symbol(ccx.sess.cstore, vid);
let gvar = str::as_c_str(sym, |buf| {
llvm::LLVMAddGlobal(ccx.llmod, ccx.int_type, buf)
});
lib::llvm::SetLinkage(gvar, lib::llvm::ExternalLinkage);
llvm::LLVMSetGlobalConstant(gvar, True);
ccx.discrims.insert(vid, gvar);
return gvar;
}
Some(llval) => return llval,
}
}
}
pub fn invoke(bcx: block, llfn: ValueRef, +llargs: ~[ValueRef]) -> block {
let _icx = bcx.insn_ctxt("invoke_");
if bcx.unreachable { return bcx; }

6
src/librustc/middle/trans/expr.rs
View File

@ -696,15 +696,15 @@ fn trans_def_dps_unadjusted(bcx: block, ref_expr: @ast::expr,
return fn_data_to_datum(bcx, impl_did, fn_data, lldest);
}
ast::def_variant(tid, vid) => {
if ty::enum_variant_with_id(ccx.tcx, tid, vid).args.len() > 0u {
let variant_info = ty::enum_variant_with_id(ccx.tcx, tid, vid);
if variant_info.args.len() > 0u {
// N-ary variant.
let fn_data = callee::trans_fn_ref(bcx, vid, ref_expr.id);
return fn_data_to_datum(bcx, vid, fn_data, lldest);
} else {
// Nullary variant.
let lldiscrimptr = GEPi(bcx, lldest, [0u, 0u]);
let lldiscrim_gv = base::lookup_discriminant(ccx, vid);
let lldiscrim = Load(bcx, lldiscrim_gv);
let lldiscrim = C_int(bcx.ccx(), variant_info.disr_val);
Store(bcx, lldiscrim, lldiscrimptr);
return bcx;
}