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Author SHA1 Message Date
Tim Chevalier
059b31f7a3 Actually call unreachable() in impossible case in type_of_inner 2011-09-15 23:22:12 -07:00
Tim Chevalier
57ede5f281 Added non_ty_var precondition to trans::type_of_inner 
This allows us to legitimately call unreachable() in the ty_var case.
 2011-09-15 23:22:12 -07:00
Marijn Haverbeke
87fa38910e Make storing returned references in a by-reference local work 
fn f(a: {x: str}) -> &str {
        ret a.x;
    }

    fn main() {
        let x = {x: "hi"};
        let &y = f(x); // Look ma, no copy!
        log_err y;
    }

Issue #918.
 2011-09-15 15:17:14 +02:00
Marijn Haverbeke
25787bd2b8 Forbid assignment to by-reference bindings 
Issue #918
 2011-09-15 14:08:54 +02:00
Marijn Haverbeke
d7a1d6a1cb Make trans understand by-ref bindings 
Issue #918
 2011-09-15 14:00:58 +02:00
Marijn Haverbeke
1cda74deee Add representation for by-ref let bindings 
Issue #918
 2011-09-15 11:42:56 +02:00
Marijn Haverbeke
7298b8f4ba Insert omitted semicolons for statements 2011-09-15 09:49:00 +02:00
Brian Anderson
31d4fe37f6 Revert "Try a little harder to avoid creating new landing pads" 
This reverts commit b8e31ac46917edcf5922f0b191c5e6c4505830d2.

Conflicts:

	src/comp/middle/trans.rs
 2011-09-14 09:19:31 -07:00
Marijn Haverbeke
93de2f0b74 Add syntax and representation for return-by-mutably-rooted-ref 
This will be used in the near future to decide what can safely
be done with the returned reference.

Issue #918
 2011-09-14 17:30:38 +02:00
Marijn Haverbeke
1cabe37155 Prevent memory errors when returning references to temp args. 
Issue #918
 2011-09-14 16:46:54 +02:00
Marijn Haverbeke
c6619f9ce0 Accept returning refs rooted in an arg from a by-ref funtion 
Issue #918
 2011-09-14 16:19:15 +02:00
Marijn Haverbeke
93d2a4f82a Add support for basic return-by-alias to trans 
Issue #918
 2011-09-14 14:39:08 +02:00
Marijn Haverbeke
6cd24173d4 Add a ret_style field to fn_ctxt in trans 2011-09-14 13:48:51 +02:00
Marijn Haverbeke
2aac43d809 Simplify trans::new_fn_ctxt_w_id 
It was still living in the pre-decent-type-inference era.
 2011-09-14 13:26:39 +02:00
Brian Anderson
6d3dd0e48c Try harder still to generate fewer landing pads 
Scopes that don't have cleanups don't need their own landing pads

This takes the optimized rustc bin from 4.7MB to 4.4
 2011-09-13 16:52:12 -07:00
Brian Anderson
b8e31ac469 Try a little harder to avoid creating new landing pads 
It's only when we add or revoke cleanups involving immediates that we need a
new landing pad for the scope.

Trims 5K off the optimized rustc bin
 2011-09-13 16:52:12 -07:00
Brian Anderson
74c39469be Reuse landing pads when possible 
Cuts the optimized rustc bin from 5.2 to 4.7MB
 2011-09-13 16:52:12 -07:00
Marijn Haverbeke
2f402343c9 Make for loop alias-safe 2011-09-13 13:05:59 +02:00
Graydon Hoare
7f94957721 Kill trailing whitespace. 2011-09-12 16:33:43 -07:00
Graydon Hoare
a4815b6742 Factor imports mindlessly. 2011-09-12 16:13:28 -07:00
Brian Anderson
393deeb06f Merge branch 'unwind' 
Conflicts:
	src/comp/middle/trans.rs
	src/comp/middle/trans_build.rs
	src/lib/run_program.rs
	src/test/compiletest/runtest.rs
 2011-09-12 09:36:51 -07:00
Marijn Haverbeke
bcf60c6600 Warn when inserting an implicit copy that may be expensive 2011-09-12 13:54:02 +02:00
Marijn Haverbeke
8dd46d4384 Properly implement copy expressions 
(And use them in some places that were doing {expr} before.)
 2011-09-12 13:13:20 +02:00
Marijn Haverbeke
ca1df2b111 Pretty-print for new arg-mode syntax 2011-09-12 12:49:00 +02:00
Marijn Haverbeke
fc6b7c8b38 Reformat for new mode syntax, step 1 
Long lines were fixed in a very crude way, as I'll be following up
with another reformat in a bit.
 2011-09-12 12:04:14 +02:00
Marijn Haverbeke
0e6e56ca60 Make the names of the arg mode tag reflect their (revised) meaning 2011-09-12 11:07:17 +02:00
Marijn Haverbeke
4be7e1e5cd Pass all arguments by reference, make immut alias mode equiv to value 
Arguments that can't be safely referenced will be implicitly copied.

(Warnings for expensive copies will be forthcoming.)

This will allow us to get rid of most of the ampersands in function
signatures. See [1].

[1] https://mail.mozilla.org/pipermail/rust-dev/2011-September/000759.html
 2011-09-12 11:06:54 +02:00
Brian Anderson
d267e7486e Zero locals when the initializer might call a function 
The function might fail, leaving the local uninitialized

Issue #236
 2011-09-11 17:31:40 -07:00
Brian Anderson
118194381c Invoke put functions 
Issue #236
 2011-09-11 17:31:40 -07:00
Brian Anderson
53f7d6119a Add some FIXMEs about unwinding implementation 
Issue #236
 2011-09-11 17:31:39 -07:00
Brian Anderson
4fba02c7e9 Invoke upcall_fail 
This allows landing pads to be generated around fail statements

Issue #236
 2011-09-11 17:31:38 -07:00
Brian Anderson
4c9eee8aa4 Run cleanups during unwinding 
Issue #236
 2011-09-11 17:31:38 -07:00
Brian Anderson
587b863772 Zero locals that have initializers that might fail 
This will avoid running cleanups on uninitialized memory

Issue #236
 2011-09-11 17:31:38 -07:00
Brian Anderson
4eb3ce3280 Add landing pads to invokes 
Issue #236
 2011-09-11 17:31:38 -07:00
Brian Anderson
4bced5e5f2 Use invoke to call (most) rust functions 
No landing pads yet.

Issue #236
 2011-09-11 17:31:38 -07:00
Marijn Haverbeke
db15591d89 Revert "Make for loops alias the vec elements, rather than copy them" 
This reverts commit 985ef59efd971f1d6b9bf4b5e484b75733e00444.
 2011-09-09 16:53:45 +02:00
Marijn Haverbeke
3ac59b0ee0 Get rid of vp2i in object field access 
Closes #557
 2011-09-09 15:53:10 +02:00
Marijn Haverbeke
985ef59efd Make for loops alias the vec elements, rather than copy them 
The alias analysis was already assuming that it worked like this.
 2011-09-09 15:34:13 +02:00
Marijn Haverbeke
0eb56e60d2 Get rid of trans::iter_sequence, use tvec::iter_vec instead 2011-09-09 15:06:06 +02:00
Marijn Haverbeke
9fb3ec95e0 Use a Phi node in trans_vec::iter_vec_raw 
Rather than incrementing a spilled pointer
 2011-09-09 14:20:15 +02:00
Patrick Walton
fb9ab95a15 rustc: When revoking a cleanup of a unique pointer, zero it out so that the GC won't try to visit it 2011-09-08 10:24:25 +02:00
Patrick Walton
7a0c9759fe rustc: Make unique pointers no longer immediates. 2011-09-08 10:24:14 +02:00
Brian Anderson
9946e467ff Export tag discriminants even for single-variant tags 
I don't know exactly what's going on but this optimization is giving
me problems with the check-fast runner. I also don't see how it is
correct for external tags.
 2011-09-07 10:32:58 -07:00
Marijn Haverbeke
f3edf8dd5e Make it possible to take the value of (and bind) native fns 
Closes #820
 2011-09-07 12:12:20 +02:00
Brian Anderson
a1d71995ec Rename istr-stuff to str in rustc. Issue #855 2011-09-02 22:11:46 -07:00
Brian Anderson
f1555e2ca8 Rename ty_istr to ty_str. Issue #855 2011-09-02 22:11:46 -07:00
Brian Anderson
5c49e4f4e9 Reformat. Issue #855 2011-09-02 22:11:42 -07:00
Tim Chevalier
b5f9053423 Add a constraint to trans::type_of 
trans::type_of now has a constraint saying that its type argument
is statically sized. This eliminates the "impossible happened" case
in type_of. Yay!

I note that this change decreased translation time for stage2/rustc
from 16.1 s to 14.0 s. I also think many of the remaining checks
could be eliminated with some mildly clever use of constrained types
and further preconditions. Future work!
 2011-09-02 19:35:17 -07:00
Patrick Walton
b329324f71 rustc: Zero out unique pointers after we drop them 2011-09-02 17:51:28 -07:00
Brian Anderson
72c14d5a41 Eliminate const_refcount. Issue #855 2011-09-02 15:13:41 -07:00