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Adjust reflection for the possibility of discriminants larger than int.

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Not only can discriminants be smaller than int now, but they can be
larger than int on 32-bit targets.  This has obvious implications for the
reflection interface.  Without this change, things fail with LLVM
assertions when we try to "extend" i64 to i32.
This commit is contained in:
Jed Davis 2013-09-29 02:20:11 -07:00
parent 92109b1202
commit fcfbfde0b7
8 changed files with 44 additions and 40 deletions
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4
src/librustc/middle/trans/common.rs
View file

@ -868,6 +868,10 @@ pub fn C_i64(i: i64) -> ValueRef {
return C_integral(Type::i64(), i as u64, true);
}
pub fn C_u64(i: u64) -> ValueRef {
return C_integral(Type::i64(), i, false);
}
pub fn C_int(cx: &CrateContext, i: int) -> ValueRef {
return C_integral(cx.int_type, i as u64, true);
}

8
src/librustc/middle/trans/reflect.rs
View file

@ -292,11 +292,11 @@ impl Reflector {
sub_path,
"get_disr");
let llfdecl = decl_internal_rust_fn(ccx, [opaqueptrty], ty::mk_int(), sym);
let llfdecl = decl_internal_rust_fn(ccx, [opaqueptrty], ty::mk_u64(), sym);
let fcx = new_fn_ctxt(ccx,
~[],
llfdecl,
ty::mk_uint(),
ty::mk_u64(),
None);
let arg = unsafe {
//
@ -308,7 +308,7 @@ impl Reflector {
};
let mut bcx = fcx.entry_bcx.unwrap();
let arg = BitCast(bcx, arg, llptrty);
let ret = adt::trans_get_discr(bcx, repr, arg, Some(ccx.int_type));
let ret = adt::trans_get_discr(bcx, repr, arg, Some(Type::i64()));
Store(bcx, ret, fcx.llretptr.unwrap());
match fcx.llreturn {
Some(llreturn) => cleanup_and_Br(bcx, bcx, llreturn),
@ -324,7 +324,7 @@ impl Reflector {
for (i, v) in variants.iter().enumerate() {
let name = ccx.sess.str_of(v.name);
let variant_args = ~[this.c_uint(i),
C_integral(self.bcx.ccx().int_type, v.disr_val, false),
C_u64(v.disr_val),
this.c_uint(v.args.len()),
this.c_slice(name)];
do this.bracketed("enum_variant", variant_args) |this| {

10
src/libstd/reflect.rs
View file

@ -16,7 +16,7 @@ Runtime type reflection
#[allow(missing_doc)];
use unstable::intrinsics::{Opaque, TyDesc, TyVisitor};
use unstable::intrinsics::{Disr, Opaque, TyDesc, TyVisitor};
use libc::c_void;
use mem;
use unstable::raw;
@ -396,7 +396,7 @@ impl<V:TyVisitor + MovePtr> TyVisitor for MovePtrAdaptor<V> {
}
fn visit_enter_enum(&mut self, n_variants: uint,
get_disr: extern unsafe fn(ptr: *Opaque) -> int,
get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
sz: uint, align: uint)
-> bool {
self.align(align);
@ -407,7 +407,7 @@ impl<V:TyVisitor + MovePtr> TyVisitor for MovePtrAdaptor<V> {
}
fn visit_enter_enum_variant(&mut self, variant: uint,
disr_val: int,
disr_val: Disr,
n_fields: uint,
name: &str) -> bool {
if ! self.inner.visit_enter_enum_variant(variant, disr_val,
@ -426,7 +426,7 @@ impl<V:TyVisitor + MovePtr> TyVisitor for MovePtrAdaptor<V> {
}
fn visit_leave_enum_variant(&mut self, variant: uint,
disr_val: int,
disr_val: Disr,
n_fields: uint,
name: &str) -> bool {
if ! self.inner.visit_leave_enum_variant(variant, disr_val,
@ -437,7 +437,7 @@ impl<V:TyVisitor + MovePtr> TyVisitor for MovePtrAdaptor<V> {
}
fn visit_leave_enum(&mut self, n_variants: uint,
get_disr: extern unsafe fn(ptr: *Opaque) -> int,
get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
sz: uint, align: uint) -> bool {
if ! self.inner.visit_leave_enum(n_variants, get_disr, sz, align) {
return false;

12
src/libstd/repr.rs
View file

@ -29,7 +29,7 @@ use reflect::{MovePtr, align};
use str::StrSlice;
use to_str::ToStr;
use vec::OwnedVector;
use unstable::intrinsics::{Opaque, TyDesc, TyVisitor, get_tydesc, visit_tydesc};
use unstable::intrinsics::{Disr, Opaque, TyDesc, TyVisitor, get_tydesc, visit_tydesc};
use unstable::raw;
/// Representations
@ -92,7 +92,7 @@ num_repr!(f64, "f64")
// New implementation using reflect::MovePtr
enum VariantState {
SearchingFor(int),
SearchingFor(Disr),
Matched,
AlreadyFound
}
@ -473,7 +473,7 @@ impl<'self> TyVisitor for ReprVisitor<'self> {
fn visit_enter_enum(&mut self,
_n_variants: uint,
get_disr: extern unsafe fn(ptr: *Opaque) -> int,
get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
_sz: uint,
_align: uint) -> bool {
let disr = unsafe {
@ -484,7 +484,7 @@ impl<'self> TyVisitor for ReprVisitor<'self> {
}
fn visit_enter_enum_variant(&mut self, _variant: uint,
disr_val: int,
disr_val: Disr,
n_fields: uint,
name: &str) -> bool {
let mut write = false;
@ -531,7 +531,7 @@ impl<'self> TyVisitor for ReprVisitor<'self> {
}
fn visit_leave_enum_variant(&mut self, _variant: uint,
_disr_val: int,
_disr_val: Disr,
n_fields: uint,
_name: &str) -> bool {
match self.var_stk[self.var_stk.len() - 1] {
@ -547,7 +547,7 @@ impl<'self> TyVisitor for ReprVisitor<'self> {
fn visit_leave_enum(&mut self,
_n_variants: uint,
_get_disr: extern unsafe fn(ptr: *Opaque) -> int,
_get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
_sz: uint,
_align: uint)
-> bool {

13
src/libstd/unstable/intrinsics.rs
View file

@ -75,6 +75,11 @@ pub struct TyDesc {
#[cfg(not(test))]
pub enum Opaque { }
#[cfg(stage0)]
pub type Disr = int;
#[cfg(not(stage0))]
pub type Disr = u64;
#[lang="ty_visitor"]
#[cfg(not(test))]
pub trait TyVisitor {
@ -140,19 +145,19 @@ pub trait TyVisitor {
sz: uint, align: uint) -> bool;
fn visit_enter_enum(&mut self, n_variants: uint,
get_disr: extern unsafe fn(ptr: *Opaque) -> int,
get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
sz: uint, align: uint) -> bool;
fn visit_enter_enum_variant(&mut self, variant: uint,
disr_val: int,
disr_val: Disr,
n_fields: uint,
name: &str) -> bool;
fn visit_enum_variant_field(&mut self, i: uint, offset: uint, inner: *TyDesc) -> bool;
fn visit_leave_enum_variant(&mut self, variant: uint,
disr_val: int,
disr_val: Disr,
n_fields: uint,
name: &str) -> bool;
fn visit_leave_enum(&mut self, n_variants: uint,
get_disr: extern unsafe fn(ptr: *Opaque) -> int,
get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
sz: uint, align: uint) -> bool;
fn visit_enter_fn(&mut self, purity: uint, proto: uint,

9
src/test/run-pass/enum-discrim-width-stuff.rs
View file

@ -13,13 +13,8 @@ use std::mem;
pub fn main() {
enum E { V = 0x1717171717171717 }
static C: E = V;
let expected: u64 = if mem::size_of::<uint>() < 8 {
0x17171717
} else {
0x1717171717171717
};
assert_eq!(expected, V as u64);
assert_eq!(expected, C as u64);
assert_eq!(V as u64, 0x1717171717171717u64);
assert_eq!(C as u64, 0x1717171717171717u64);
assert_eq!(format!("{:?}", V), ~"V");
assert_eq!(format!("{:?}", C), ~"V");
}

18
src/test/run-pass/reflect-visit-data.rs
View file

@ -15,7 +15,7 @@
use std::libc::c_void;
use std::ptr;
use std::mem;
use std::unstable::intrinsics::{TyDesc, get_tydesc, visit_tydesc, TyVisitor, Opaque};
use std::unstable::intrinsics::{TyDesc, get_tydesc, visit_tydesc, TyVisitor, Disr, Opaque};
use std::unstable::raw::Vec;
#[doc = "High-level interfaces to `std::unstable::intrinsics::visit_ty` reflection system."]
@ -380,7 +380,7 @@ impl<V:TyVisitor + movable_ptr> TyVisitor for ptr_visit_adaptor<V> {
}
fn visit_enter_enum(&mut self, n_variants: uint,
get_disr: extern unsafe fn(ptr: *Opaque) -> int,
get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
sz: uint, align: uint)
-> bool {
self.align(align);
@ -389,7 +389,7 @@ impl<V:TyVisitor + movable_ptr> TyVisitor for ptr_visit_adaptor<V> {
}
fn visit_enter_enum_variant(&mut self, variant: uint,
disr_val: int,
disr_val: Disr,
n_fields: uint,
name: &str) -> bool {
if ! self.inner.visit_enter_enum_variant(variant, disr_val,
@ -405,7 +405,7 @@ impl<V:TyVisitor + movable_ptr> TyVisitor for ptr_visit_adaptor<V> {
}
fn visit_leave_enum_variant(&mut self, variant: uint,
disr_val: int,
disr_val: Disr,
n_fields: uint,
name: &str) -> bool {
if ! self.inner.visit_leave_enum_variant(variant, disr_val,
@ -416,7 +416,7 @@ impl<V:TyVisitor + movable_ptr> TyVisitor for ptr_visit_adaptor<V> {
}
fn visit_leave_enum(&mut self, n_variants: uint,
get_disr: extern unsafe fn(ptr: *Opaque) -> int,
get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
sz: uint, align: uint)
-> bool {
if ! self.inner.visit_leave_enum(n_variants, get_disr, sz, align) { return false; }
@ -578,24 +578,24 @@ impl TyVisitor for my_visitor {
_sz: uint, _align: uint) -> bool { true }
fn visit_enter_enum(&mut self, _n_variants: uint,
_get_disr: extern unsafe fn(ptr: *Opaque) -> int,
_get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
_sz: uint, _align: uint) -> bool {
// FIXME (#3732): this needs to rewind between enum variants, or something.
true
}
fn visit_enter_enum_variant(&mut self, _variant: uint,
_disr_val: int,
_disr_val: Disr,
_n_fields: uint,
_name: &str) -> bool { true }
fn visit_enum_variant_field(&mut self, _i: uint, _offset: uint, inner: *TyDesc) -> bool {
self.visit_inner(inner)
}
fn visit_leave_enum_variant(&mut self, _variant: uint,
_disr_val: int,
_disr_val: Disr,
_n_fields: uint,
_name: &str) -> bool { true }
fn visit_leave_enum(&mut self, _n_variants: uint,
_get_disr: extern unsafe fn(ptr: *Opaque) -> int,
_get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
_sz: uint, _align: uint) -> bool { true }
fn visit_enter_fn(&mut self, _purity: uint, _proto: uint,

10
src/test/run-pass/reflect-visit-type.rs
View file

@ -10,7 +10,7 @@
#[feature(managed_boxes)];
use std::unstable::intrinsics::{TyDesc, get_tydesc, visit_tydesc, TyVisitor, Opaque};
use std::unstable::intrinsics::{TyDesc, get_tydesc, visit_tydesc, TyVisitor, Disr, Opaque};
struct MyVisitor {
types: @mut ~[~str],
@ -114,22 +114,22 @@ impl TyVisitor for MyVisitor {
_sz: uint, _align: uint) -> bool { true }
fn visit_enter_enum(&mut self, _n_variants: uint,
_get_disr: extern unsafe fn(ptr: *Opaque) -> int,
_get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
_sz: uint, _align: uint) -> bool { true }
fn visit_enter_enum_variant(&mut self,
_variant: uint,
_disr_val: int,
_disr_val: Disr,
_n_fields: uint,
_name: &str) -> bool { true }
fn visit_enum_variant_field(&mut self, _i: uint, _offset: uint, _inner: *TyDesc) -> bool { true }
fn visit_leave_enum_variant(&mut self,
_variant: uint,
_disr_val: int,
_disr_val: Disr,
_n_fields: uint,
_name: &str) -> bool { true }
fn visit_leave_enum(&mut self,
_n_variants: uint,
_get_disr: extern unsafe fn(ptr: *Opaque) -> int,
_get_disr: extern unsafe fn(ptr: *Opaque) -> Disr,
_sz: uint, _align: uint) -> bool { true }
fn visit_enter_fn(&mut self, _purity: uint, _proto: uint,