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2540 Commits

Author SHA1 Message Date
Marijn Haverbeke
e33f116598 Remove some obsolete 'copy' operators from trans 2011-09-20 17:35:40 +02:00
Marijn Haverbeke
1eaddb772e Properly handle 'put;' in trans 
Closes #947
 2011-09-20 17:34:32 +02:00
Brian Anderson
7c6630a367 Build tuples in two phases to avoid cleaning up partial tuples 2011-09-19 17:59:53 -07:00
Brian Anderson
9626e2f71f Register tuple cleanups after the tuple is built 
Issue #936
 2011-09-19 17:59:47 -07:00
Brian Anderson
dd1cf63515 Build records in two phases to avoid cleanups on partial records 2011-09-19 14:28:04 -07:00
Brian Anderson
432e931a2a Don't register record cleanups until the record is built 2011-09-19 14:28:04 -07:00
Marijn Haverbeke
eafb6789a2 Stop creating function pairs for static functions 
These are now called directly. When taking their value, a null pointer is added
to create a pair.
 2011-09-18 22:05:58 +02:00
Tim Chevalier
8640e67e3f Add a precondition to GEP_tup_like 2011-09-17 10:18:30 -07:00
Tim Chevalier
2b98eccfee Add a type_is_tup_like predicate that takes a block ctxt, and make some fns pure 2011-09-17 10:18:11 -07:00
Tim Chevalier
8613f28a16 In trans, replace another impossible case with a precondition 2011-09-17 09:13:05 -07:00
Brian Anderson
1002623201 Make move-mode arguments unwind correctly. Closes #939 2011-09-16 14:38:04 -07:00
Tim Chevalier
99236d64d0 Dead code elim 2011-09-16 13:32:44 -07:00
Tim Chevalier
fa74df033d Add a constraint on trans::type_of_fn_from_ty 
And change callers appropriately.
 2011-09-16 13:07:08 -07:00
Tim Chevalier
0d4b51d10d Add a returns_non_ty_var predicate 
which just calls non_ty_var on the return type of t, assuming t is
a function type.
 2011-09-16 13:06:31 -07:00
Tim Chevalier
1b2c5c4c9b Make ty_fn_ret pure and get rid of a duplicate function 2011-09-16 13:06:31 -07:00
Marijn Haverbeke
43b219dbec Work around an apparent compiler bug to make my patch run 
Without this, it would fail when optimization is turned on. The result of
the Load(bcx, llclosure) call would end up in llenv in a corrupted form.
 2011-09-16 21:31:36 +02:00
Marijn Haverbeke
575aae407b Saner approach to lvalues and callable values in trans 
LValues no longer carry information about generics and objs, instead
there's an extended form of lvalue, lval_maybe_callee, only used by
call and bind, which holds this info.

This makes it possible to take the value of a method and get a working
closure, and will (with some more work) allow us to call statically
known functions without loading from their pair.

Closes #435
Closes #758
 2011-09-16 21:31:36 +02:00
Tim Chevalier
172df2e3a2 Add non_ty_var precondition for type_of_fn, plus minor cleanup 2011-09-16 10:58:02 -07:00
Marijn Haverbeke
ad470d741e Revert "Saner approach to lvalues and callable values in trans" 
This reverts commit 66153436c9070386786c8a38cde199b5d3e71289.
 2011-09-16 18:37:46 +02:00
Marijn Haverbeke
133d36f452 Require body of else-less if expressions to be a value-less block 
For consistency with other constructs that could not possibly return a
value (say, loops).
 2011-09-16 18:21:06 +02:00
Marijn Haverbeke
66153436c9 Saner approach to lvalues and callable values in trans 
LValues no longer carry information about generics and objs, instead
there's an extended form of lvalue, lval_maybe_callee, only used by
call and bind, which holds this info.

This makes it possible to take the value of a method and get a working
closure, and will (with some more work) allow us to call statically
known functions without loading from their pair.

Closes #435
Closes #758
 2011-09-16 18:21:05 +02:00
Marijn Haverbeke
639d88a693 Move expr_uniq case in trans to a saner place 
Note that unique pointers are still broken in more ways than I can count.
 2011-09-16 15:03:03 +02:00
Marijn Haverbeke
f8a35234ad Remove autoderef for calls 
We were only using it in a single place, and there for no discernable reason
(probably as part of the bare-fn-vals-are-not-copyable plan). It seems more
surprising than useful.
 2011-09-16 14:39:30 +02:00
Marijn Haverbeke
c04490d97b Remove unused method_ty field from lval_result 2011-09-16 14:18:49 +02:00
Marijn Haverbeke
fb42d839a0 Clean up (and optimize) root-mutability analysis in alias.rs 2011-09-16 13:46:03 +02:00
Marijn Haverbeke
d7587c1eda Change convention for specifying referenced argument 
It is now 1-based, rather than 0 based. (Seems more natural, and allows 0 to
be used to refer to self and maybe to closure.)

Also allows non-referenced args to be implicitly copied again.

Issue #918
 2011-09-16 12:42:18 +02:00
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
Tim Chevalier
2c6eba00dd Added an extra check in trans_alt 
Gratuitous right now, but I'm going to change the type of trans::type_of
 2011-09-15 20:32:01 -07:00
Tim Chevalier
f41f75fe53 Added more predicates in trans 
Added the non_ty_var predicate (soon to be used)
Added a check in get_res_dtor (will be necessary for a future change
to type_of_fn)
Removed a gratuitous ret
 2011-09-15 20:23:06 -07:00
Tim Chevalier
059952da5b Change a few span_fatals to span_err 2011-09-15 19:51:27 -07:00
Marijn Haverbeke
b843cf2117 Generalize expression roots in alias analysis 
This allows calls-returning-a-reference to count as expression roots,
making it possible to return the result of such a call by reference.

Issue #918
 2011-09-15 17:01:35 +02:00
Marijn Haverbeke
3abe3671bd Require the parameter that will be referenced to be noted 
Issue #918
 2011-09-15 16:15:17 +02:00
Marijn Haverbeke
75eee8b194 Overhaul alias-checking of blocks 
The set of active bindings has to be updated as by-reference locals are
encountered.

Issue #918
 2011-09-15 15:43:15 +02:00
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
8aad16112b Implement basic checking of by-reference bindings 
Issue #918
 2011-09-15 13:40:28 +02:00
Marijn Haverbeke
44c6370e6a Move local numbering into ast_map.rs 
This further simplifies the alias pass, which is sorely needed.
 2011-09-15 13:18:32 +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
a3c449df74 Make ast_map.rs index function args, switch it over to simple_visitor 2011-09-14 15:30:59 +02:00
Marijn Haverbeke
cd0e7fc041 Remove some extra white-space introduced by the pretty-printer 2011-09-14 15:20:22 +02:00
Marijn Haverbeke
7d69712dee Disallow implicit arg copying when the function returns a ref 
Issue #918
 2011-09-14 14:57:20 +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
9a69ee79e0 Clean up trans_obj.rs a bit 
As a preparation to adding an arg to type_of_fn_full
 2011-09-14 13:49:22 +02:00