1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
14 use llvm::{ConstFCmp, ConstICmp, SetLinkage, PrivateLinkage, ValueRef, Bool, True, False};
15 use llvm::{IntEQ, IntNE, IntUGT, IntUGE, IntULT, IntULE, IntSGT, IntSGE, IntSLT, IntSLE,
16 RealOEQ, RealOGT, RealOGE, RealOLT, RealOLE, RealONE};
17 use middle::{const_eval, def};
18 use trans::{adt, consts, debuginfo, expr, inline, machine};
19 use trans::base::{self, push_ctxt};
21 use trans::type_::Type;
23 use middle::subst::Substs;
24 use middle::ty::{self, Ty};
25 use util::ppaux::{Repr, ty_to_string};
27 use std::iter::repeat;
29 use syntax::{ast, ast_util};
32 pub fn const_lit(cx: &CrateContext, e: &ast::Expr, lit: &ast::Lit)
34 let _icx = push_ctxt("trans_lit");
35 debug!("const_lit: {:?}", lit);
37 ast::LitByte(b) => C_integral(Type::uint_from_ty(cx, ast::TyU8), b as u64, false),
38 ast::LitChar(i) => C_integral(Type::char(cx), i as u64, false),
39 ast::LitInt(i, ast::SignedIntLit(t, _)) => {
40 C_integral(Type::int_from_ty(cx, t), i, true)
42 ast::LitInt(u, ast::UnsignedIntLit(t)) => {
43 C_integral(Type::uint_from_ty(cx, t), u, false)
45 ast::LitInt(i, ast::UnsuffixedIntLit(_)) => {
46 let lit_int_ty = ty::node_id_to_type(cx.tcx(), e.id);
47 match lit_int_ty.sty {
49 C_integral(Type::int_from_ty(cx, t), i as u64, true)
52 C_integral(Type::uint_from_ty(cx, t), i as u64, false)
54 _ => cx.sess().span_bug(lit.span,
55 &format!("integer literal has type {} (expected int \
57 ty_to_string(cx.tcx(), lit_int_ty))[])
60 ast::LitFloat(ref fs, t) => {
61 C_floating(fs.get(), Type::float_from_ty(cx, t))
63 ast::LitFloatUnsuffixed(ref fs) => {
64 let lit_float_ty = ty::node_id_to_type(cx.tcx(), e.id);
65 match lit_float_ty.sty {
67 C_floating(fs.get(), Type::float_from_ty(cx, t))
70 cx.sess().span_bug(lit.span,
71 "floating point literal doesn't have the right type");
75 ast::LitBool(b) => C_bool(cx, b),
76 ast::LitStr(ref s, _) => C_str_slice(cx, (*s).clone()),
77 ast::LitBinary(ref data) => C_binary_slice(cx, &data[]),
81 pub fn ptrcast(val: ValueRef, ty: Type) -> ValueRef {
83 llvm::LLVMConstPointerCast(val, ty.to_ref())
87 fn const_vec(cx: &CrateContext, e: &ast::Expr,
88 es: &[P<ast::Expr>]) -> (ValueRef, Type) {
89 let vec_ty = ty::expr_ty(cx.tcx(), e);
90 let unit_ty = ty::sequence_element_type(cx.tcx(), vec_ty);
91 let llunitty = type_of::type_of(cx, unit_ty);
92 let vs = es.iter().map(|e| const_expr(cx, &**e).0)
94 // If the vector contains enums, an LLVM array won't work.
95 let v = if vs.iter().any(|vi| val_ty(*vi) != llunitty) {
96 C_struct(cx, &vs[], false)
98 C_array(llunitty, &vs[])
103 pub fn const_addr_of(cx: &CrateContext, cv: ValueRef, mutbl: ast::Mutability) -> ValueRef {
105 let gv = llvm::LLVMAddGlobal(cx.llmod(), val_ty(cv).to_ref(),
106 "const\0".as_ptr() as *const _);
107 llvm::LLVMSetInitializer(gv, cv);
108 llvm::LLVMSetGlobalConstant(gv,
109 if mutbl == ast::MutImmutable {True} else {False});
110 SetLinkage(gv, PrivateLinkage);
115 fn const_deref_ptr(cx: &CrateContext, v: ValueRef) -> ValueRef {
116 let v = match cx.const_globals().borrow().get(&(v as int)) {
121 llvm::LLVMGetInitializer(v)
125 fn const_deref_newtype<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, v: ValueRef, t: Ty<'tcx>)
127 let repr = adt::represent_type(cx, t);
128 adt::const_get_field(cx, &*repr, v, 0, 0)
131 fn const_deref<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, v: ValueRef,
132 t: Ty<'tcx>, explicit: bool)
133 -> (ValueRef, Ty<'tcx>) {
134 match ty::deref(t, explicit) {
137 ty::ty_ptr(mt) | ty::ty_rptr(_, mt) => {
138 if type_is_sized(cx.tcx(), mt.ty) {
139 (const_deref_ptr(cx, v), mt.ty)
141 // Derefing a fat pointer does not change the representation,
142 // just the type to ty_open.
143 (v, ty::mk_open(cx.tcx(), mt.ty))
146 ty::ty_enum(..) | ty::ty_struct(..) => {
147 assert!(mt.mutbl != ast::MutMutable);
148 (const_deref_newtype(cx, v, t), mt.ty)
151 cx.sess().bug(&format!("unexpected dereferenceable type {}",
152 ty_to_string(cx.tcx(), t))[])
157 cx.sess().bug(&format!("cannot dereference const of type {}",
158 ty_to_string(cx.tcx(), t))[])
163 pub fn get_const_val(cx: &CrateContext,
164 mut def_id: ast::DefId) -> ValueRef {
165 let contains_key = cx.const_values().borrow().contains_key(&def_id.node);
166 if !ast_util::is_local(def_id) || !contains_key {
167 if !ast_util::is_local(def_id) {
168 def_id = inline::maybe_instantiate_inline(cx, def_id);
171 if let ast::ItemConst(..) = cx.tcx().map.expect_item(def_id.node).node {
172 base::get_item_val(cx, def_id.node);
176 cx.const_values().borrow()[def_id.node].clone()
179 pub fn const_expr<'a, 'tcx>(cx: &CrateContext<'a, 'tcx>, e: &ast::Expr)
180 -> (ValueRef, Ty<'tcx>) {
181 let llconst = const_expr_unadjusted(cx, e);
182 let mut llconst = llconst;
183 let ety = ty::expr_ty(cx.tcx(), e);
184 let mut ety_adjusted = ty::expr_ty_adjusted(cx.tcx(), e);
185 let opt_adj = cx.tcx().adjustments.borrow().get(&e.id).cloned();
190 ty::AdjustReifyFnPointer(_def_id) => {
191 // FIXME(#19925) once fn item types are
192 // zero-sized, we'll need to do something here
194 ty::AdjustDerefRef(ref adj) => {
196 // Save the last autoderef in case we can avoid it.
197 if adj.autoderefs > 0 {
198 for _ in range(0, adj.autoderefs-1) {
199 let (dv, dt) = const_deref(cx, llconst, ty, false);
207 let (dv, dt) = const_deref(cx, llconst, ty, false);
210 // If we derefed a fat pointer then we will have an
211 // open type here. So we need to update the type with
212 // the one returned from const_deref.
215 Some(ref autoref) => {
217 ty::AutoUnsafe(_, None) |
218 ty::AutoPtr(ty::ReStatic, _, None) => {
219 // Don't copy data to do a deref+ref
220 // (i.e., skip the last auto-deref).
221 if adj.autoderefs == 0 {
222 llconst = const_addr_of(cx, llconst, ast::MutImmutable);
225 ty::AutoPtr(ty::ReStatic, _, Some(box ty::AutoUnsize(..))) => {
226 if adj.autoderefs > 0 {
227 // Seeing as we are deref'ing here and take a reference
228 // again to make the pointer part of the far pointer below,
229 // we just skip the whole thing. We still need the type
230 // though. This works even if we don't need to deref
231 // because of byref semantics. Note that this is not just
232 // an optimisation, it is necessary for mutable vectors to
234 let (_, dt) = const_deref(cx, llconst, ty, false);
237 llconst = const_addr_of(cx, llconst, ast::MutImmutable)
241 ty::ty_vec(unit_ty, Some(len)) => {
242 let llunitty = type_of::type_of(cx, unit_ty);
243 let llptr = ptrcast(llconst, llunitty.ptr_to());
244 assert!(cx.const_globals().borrow_mut()
245 .insert(llptr as int, llconst).is_none());
246 assert_eq!(abi::FAT_PTR_ADDR, 0);
247 assert_eq!(abi::FAT_PTR_EXTRA, 1);
248 llconst = C_struct(cx, &[
253 _ => cx.sess().span_bug(e.span,
254 &format!("unimplemented type in const unsize: {}",
255 ty_to_string(cx.tcx(), ty))[])
261 &format!("unimplemented const \
273 let llty = type_of::sizing_type_of(cx, ety_adjusted);
274 let csize = machine::llsize_of_alloc(cx, val_ty(llconst));
275 let tsize = machine::llsize_of_alloc(cx, llty);
278 // FIXME these values could use some context
279 llvm::LLVMDumpValue(llconst);
280 llvm::LLVMDumpValue(C_undef(llty));
282 cx.sess().bug(&format!("const {} of type {} has size {} instead of {}",
283 e.repr(cx.tcx()), ty_to_string(cx.tcx(), ety),
286 (llconst, ety_adjusted)
289 // the bool returned is whether this expression can be inlined into other crates
290 // if it's assigned to a static.
291 fn const_expr_unadjusted(cx: &CrateContext, e: &ast::Expr) -> ValueRef {
292 let map_list = |&: exprs: &[P<ast::Expr>]| {
293 exprs.iter().map(|e| const_expr(cx, &**e).0)
294 .fold(Vec::new(), |mut l, val| { l.push(val); l })
297 let _icx = push_ctxt("const_expr");
298 return match e.node {
299 ast::ExprLit(ref lit) => {
300 consts::const_lit(cx, e, &**lit)
302 ast::ExprBinary(b, ref e1, ref e2) => {
303 let (te1, _) = const_expr(cx, &**e1);
304 let (te2, _) = const_expr(cx, &**e2);
306 let te2 = base::cast_shift_const_rhs(b, te1, te2);
308 /* Neither type is bottom, and we expect them to be unified
309 * already, so the following is safe. */
310 let ty = ty::expr_ty(cx.tcx(), &**e1);
311 let is_float = ty::type_is_fp(ty);
312 let signed = ty::type_is_signed(ty);
315 if is_float { llvm::LLVMConstFAdd(te1, te2) }
316 else { llvm::LLVMConstAdd(te1, te2) }
319 if is_float { llvm::LLVMConstFSub(te1, te2) }
320 else { llvm::LLVMConstSub(te1, te2) }
323 if is_float { llvm::LLVMConstFMul(te1, te2) }
324 else { llvm::LLVMConstMul(te1, te2) }
327 if is_float { llvm::LLVMConstFDiv(te1, te2) }
328 else if signed { llvm::LLVMConstSDiv(te1, te2) }
329 else { llvm::LLVMConstUDiv(te1, te2) }
332 if is_float { llvm::LLVMConstFRem(te1, te2) }
333 else if signed { llvm::LLVMConstSRem(te1, te2) }
334 else { llvm::LLVMConstURem(te1, te2) }
336 ast::BiAnd => llvm::LLVMConstAnd(te1, te2),
337 ast::BiOr => llvm::LLVMConstOr(te1, te2),
338 ast::BiBitXor => llvm::LLVMConstXor(te1, te2),
339 ast::BiBitAnd => llvm::LLVMConstAnd(te1, te2),
340 ast::BiBitOr => llvm::LLVMConstOr(te1, te2),
341 ast::BiShl => llvm::LLVMConstShl(te1, te2),
343 if signed { llvm::LLVMConstAShr(te1, te2) }
344 else { llvm::LLVMConstLShr(te1, te2) }
347 if is_float { ConstFCmp(RealOEQ, te1, te2) }
348 else { ConstICmp(IntEQ, te1, te2) }
351 if is_float { ConstFCmp(RealOLT, te1, te2) }
353 if signed { ConstICmp(IntSLT, te1, te2) }
354 else { ConstICmp(IntULT, te1, te2) }
358 if is_float { ConstFCmp(RealOLE, te1, te2) }
360 if signed { ConstICmp(IntSLE, te1, te2) }
361 else { ConstICmp(IntULE, te1, te2) }
365 if is_float { ConstFCmp(RealONE, te1, te2) }
366 else { ConstICmp(IntNE, te1, te2) }
369 if is_float { ConstFCmp(RealOGE, te1, te2) }
371 if signed { ConstICmp(IntSGE, te1, te2) }
372 else { ConstICmp(IntUGE, te1, te2) }
376 if is_float { ConstFCmp(RealOGT, te1, te2) }
378 if signed { ConstICmp(IntSGT, te1, te2) }
379 else { ConstICmp(IntUGT, te1, te2) }
384 ast::ExprUnary(u, ref e) => {
385 let (te, _) = const_expr(cx, &**e);
386 let ty = ty::expr_ty(cx.tcx(), &**e);
387 let is_float = ty::type_is_fp(ty);
389 ast::UnUniq | ast::UnDeref => {
390 let (dv, _dt) = const_deref(cx, te, ty, true);
393 ast::UnNot => llvm::LLVMConstNot(te),
395 if is_float { llvm::LLVMConstFNeg(te) }
396 else { llvm::LLVMConstNeg(te) }
400 ast::ExprField(ref base, field) => {
401 let (bv, bt) = const_expr(cx, &**base);
402 let brepr = adt::represent_type(cx, bt);
403 expr::with_field_tys(cx.tcx(), bt, None, |discr, field_tys| {
404 let ix = ty::field_idx_strict(cx.tcx(), field.node.name, field_tys);
405 adt::const_get_field(cx, &*brepr, bv, discr, ix)
408 ast::ExprTupField(ref base, idx) => {
409 let (bv, bt) = const_expr(cx, &**base);
410 let brepr = adt::represent_type(cx, bt);
411 expr::with_field_tys(cx.tcx(), bt, None, |discr, _| {
412 adt::const_get_field(cx, &*brepr, bv, discr, idx.node)
416 ast::ExprIndex(ref base, ref index) => {
417 let (bv, bt) = const_expr(cx, &**base);
418 let iv = match const_eval::eval_const_expr(cx.tcx(), &**index) {
419 const_eval::const_int(i) => i as u64,
420 const_eval::const_uint(u) => u,
421 _ => cx.sess().span_bug(index.span,
422 "index is not an integer-constant expression")
424 let (arr, len) = match bt.sty {
425 ty::ty_vec(_, Some(u)) => (bv, C_uint(cx, u)),
426 ty::ty_open(ty) => match ty.sty {
427 ty::ty_vec(_, None) | ty::ty_str => {
428 let e1 = const_get_elt(cx, bv, &[0]);
429 (const_deref_ptr(cx, e1), const_get_elt(cx, bv, &[1]))
431 _ => cx.sess().span_bug(base.span,
432 &format!("index-expr base must be a vector \
433 or string type, found {}",
434 ty_to_string(cx.tcx(), bt))[])
436 ty::ty_rptr(_, mt) => match mt.ty.sty {
437 ty::ty_vec(_, Some(u)) => {
438 (const_deref_ptr(cx, bv), C_uint(cx, u))
440 _ => cx.sess().span_bug(base.span,
441 &format!("index-expr base must be a vector \
442 or string type, found {}",
443 ty_to_string(cx.tcx(), bt))[])
445 _ => cx.sess().span_bug(base.span,
446 &format!("index-expr base must be a vector \
447 or string type, found {}",
448 ty_to_string(cx.tcx(), bt))[])
451 let len = llvm::LLVMConstIntGetZExtValue(len) as u64;
452 let len = match bt.sty {
453 ty::ty_uniq(ty) | ty::ty_rptr(_, ty::mt{ty, ..}) => match ty.sty {
463 // FIXME #3170: report this earlier on in the const-eval
464 // pass. Reporting here is a bit late.
465 cx.sess().span_err(e.span,
466 "const index-expr is out of bounds");
468 const_get_elt(cx, arr, &[iv as c_uint])
470 ast::ExprCast(ref base, _) => {
471 let ety = ty::expr_ty(cx.tcx(), e);
472 let llty = type_of::type_of(cx, ety);
473 let (v, basety) = const_expr(cx, &**base);
474 return match (expr::cast_type_kind(cx.tcx(), basety),
475 expr::cast_type_kind(cx.tcx(), ety)) {
477 (expr::cast_integral, expr::cast_integral) => {
478 let s = ty::type_is_signed(basety) as Bool;
479 llvm::LLVMConstIntCast(v, llty.to_ref(), s)
481 (expr::cast_integral, expr::cast_float) => {
482 if ty::type_is_signed(basety) {
483 llvm::LLVMConstSIToFP(v, llty.to_ref())
485 llvm::LLVMConstUIToFP(v, llty.to_ref())
488 (expr::cast_float, expr::cast_float) => {
489 llvm::LLVMConstFPCast(v, llty.to_ref())
491 (expr::cast_float, expr::cast_integral) => {
492 if ty::type_is_signed(ety) { llvm::LLVMConstFPToSI(v, llty.to_ref()) }
493 else { llvm::LLVMConstFPToUI(v, llty.to_ref()) }
495 (expr::cast_enum, expr::cast_integral) => {
496 let repr = adt::represent_type(cx, basety);
497 let discr = adt::const_get_discrim(cx, &*repr, v);
498 let iv = C_integral(cx.int_type(), discr, false);
499 let ety_cast = expr::cast_type_kind(cx.tcx(), ety);
501 expr::cast_integral => {
502 let s = ty::type_is_signed(ety) as Bool;
503 llvm::LLVMConstIntCast(iv, llty.to_ref(), s)
505 _ => cx.sess().bug("enum cast destination is not \
509 (expr::cast_pointer, expr::cast_pointer) => {
512 (expr::cast_integral, expr::cast_pointer) => {
513 llvm::LLVMConstIntToPtr(v, llty.to_ref())
515 (expr::cast_pointer, expr::cast_integral) => {
516 llvm::LLVMConstPtrToInt(v, llty.to_ref())
519 cx.sess().impossible_case(e.span,
520 "bad combination of types for cast")
524 ast::ExprAddrOf(mutbl, ref sub) => {
525 // If this is the address of some static, then we need to return
526 // the actual address of the static itself (short circuit the rest
531 ast::ExprParen(ref sub) => cur = sub,
535 let opt_def = cx.tcx().def_map.borrow().get(&cur.id).cloned();
536 if let Some(def::DefStatic(def_id, _)) = opt_def {
537 let ty = ty::expr_ty(cx.tcx(), e);
538 return get_static_val(cx, def_id, ty);
541 // If this isn't the address of a static, then keep going through
542 // normal constant evaluation.
543 let (e, _) = const_expr(cx, &**sub);
544 const_addr_of(cx, e, mutbl)
546 ast::ExprTup(ref es) => {
547 let ety = ty::expr_ty(cx.tcx(), e);
548 let repr = adt::represent_type(cx, ety);
549 let vals = map_list(&es[]);
550 adt::trans_const(cx, &*repr, 0, &vals[])
552 ast::ExprStruct(_, ref fs, ref base_opt) => {
553 let ety = ty::expr_ty(cx.tcx(), e);
554 let repr = adt::represent_type(cx, ety);
557 let base_val = match *base_opt {
558 Some(ref base) => Some(const_expr(cx, &**base)),
562 expr::with_field_tys(tcx, ety, Some(e.id), |discr, field_tys| {
563 let cs = field_tys.iter().enumerate()
564 .map(|(ix, &field_ty)| {
565 match fs.iter().find(|f| field_ty.name == f.ident.node.name) {
566 Some(ref f) => const_expr(cx, &*f.expr).0,
570 adt::const_get_field(cx, &*repr, bv,
574 cx.sess().span_bug(e.span,
575 "missing struct field")
580 }).collect::<Vec<_>>();
581 adt::trans_const(cx, &*repr, discr, &cs[])
584 ast::ExprVec(ref es) => {
585 const_vec(cx, e, es.as_slice()).0
587 ast::ExprRepeat(ref elem, ref count) => {
588 let vec_ty = ty::expr_ty(cx.tcx(), e);
589 let unit_ty = ty::sequence_element_type(cx.tcx(), vec_ty);
590 let llunitty = type_of::type_of(cx, unit_ty);
591 let n = match const_eval::eval_const_expr(cx.tcx(), &**count) {
592 const_eval::const_int(i) => i as uint,
593 const_eval::const_uint(i) => i as uint,
594 _ => cx.sess().span_bug(count.span, "count must be integral const expression.")
596 let vs: Vec<_> = repeat(const_expr(cx, &**elem).0).take(n).collect();
597 if vs.iter().any(|vi| val_ty(*vi) != llunitty) {
598 C_struct(cx, &vs[], false)
600 C_array(llunitty, &vs[])
603 ast::ExprPath(_) => {
604 let def = cx.tcx().def_map.borrow()[e.id];
606 def::DefFn(..) | def::DefStaticMethod(..) | def::DefMethod(..) => {
607 expr::trans_def_fn_unadjusted(cx, e, def, &Substs::trans_empty()).val
609 def::DefConst(def_id) => {
610 get_const_val(cx, def_id)
612 def::DefVariant(enum_did, variant_did, _) => {
613 let vinfo = ty::enum_variant_with_id(cx.tcx(),
616 if vinfo.args.len() > 0 {
618 expr::trans_def_fn_unadjusted(cx, e, def, &Substs::trans_empty()).val
621 let ety = ty::expr_ty(cx.tcx(), e);
622 let repr = adt::represent_type(cx, ety);
623 adt::trans_const(cx, &*repr, vinfo.disr_val, &[])
626 def::DefStruct(_) => {
627 let ety = ty::expr_ty(cx.tcx(), e);
628 if let ty::ty_bare_fn(..) = ety.sty {
630 expr::trans_def_fn_unadjusted(cx, e, def, &Substs::trans_empty()).val
633 C_null(type_of::type_of(cx, ety))
637 cx.sess().span_bug(e.span, "expected a const, fn, struct, \
642 ast::ExprCall(ref callee, ref args) => {
643 let opt_def = cx.tcx().def_map.borrow().get(&callee.id).cloned();
645 Some(def::DefStruct(_)) => {
646 let ety = ty::expr_ty(cx.tcx(), e);
647 let repr = adt::represent_type(cx, ety);
648 let arg_vals = map_list(&args[]);
649 adt::trans_const(cx, &*repr, 0, &arg_vals[])
651 Some(def::DefVariant(enum_did, variant_did, _)) => {
652 let ety = ty::expr_ty(cx.tcx(), e);
653 let repr = adt::represent_type(cx, ety);
654 let vinfo = ty::enum_variant_with_id(cx.tcx(),
657 let arg_vals = map_list(&args[]);
663 _ => cx.sess().span_bug(e.span, "expected a struct or variant def")
666 ast::ExprParen(ref e) => const_expr(cx, &**e).0,
667 ast::ExprBlock(ref block) => {
669 Some(ref expr) => const_expr(cx, &**expr).0,
673 _ => cx.sess().span_bug(e.span,
674 "bad constant expression type in consts::const_expr")
679 pub fn trans_static(ccx: &CrateContext, m: ast::Mutability, id: ast::NodeId) {
681 let _icx = push_ctxt("trans_static");
682 let g = base::get_item_val(ccx, id);
683 // At this point, get_item_val has already translated the
684 // constant's initializer to determine its LLVM type.
685 let v = ccx.static_values().borrow()[id].clone();
686 // boolean SSA values are i1, but they have to be stored in i8 slots,
687 // otherwise some LLVM optimization passes don't work as expected
688 let v = if llvm::LLVMTypeOf(v) == Type::i1(ccx).to_ref() {
689 llvm::LLVMConstZExt(v, Type::i8(ccx).to_ref())
693 llvm::LLVMSetInitializer(g, v);
695 // As an optimization, all shared statics which do not have interior
696 // mutability are placed into read-only memory.
697 if m != ast::MutMutable {
698 let node_ty = ty::node_id_to_type(ccx.tcx(), id);
699 let tcontents = ty::type_contents(ccx.tcx(), node_ty);
700 if !tcontents.interior_unsafe() {
701 llvm::LLVMSetGlobalConstant(g, True);
704 debuginfo::create_global_var_metadata(ccx, id, g);
708 fn get_static_val<'a, 'tcx>(ccx: &CrateContext<'a, 'tcx>, did: ast::DefId,
709 ty: Ty<'tcx>) -> ValueRef {
710 if ast_util::is_local(did) { return base::get_item_val(ccx, did.node) }
711 base::trans_external_path(ccx, did, ty)