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663 Commits

Author SHA1 Message Date
bors
6fcb483609 auto merge of #6848 : pcwalton/rust/issue-6352, r=pcwalton 
r? @nikomatsakis
 2013-05-30 23:31:48 -07:00
Patrick Walton
40b455792d librustc: Bump the offset when translating const structs. Closes #6352. 2013-05-30 18:17:32 -07:00
Niko Matsakis
9c7eb068e5 Replace NDM with proper FIXME 2013-05-30 15:20:36 -04:00
Niko Matsakis
7a1a40890d Remove copy bindings from patterns. 2013-05-30 15:20:36 -04:00
Niko Matsakis
5209709e46 Fix matching of rvalues with destructors 
Fixes #4542.
 2013-05-30 15:20:36 -04:00
Niko Matsakis
c492a2126f Remove some spurious copies that are identified by later patches 2013-05-30 09:54:39 -04:00
Niko Matsakis
7dfb865339 Remove local_imm/local_mem since all variables are now by reference 2013-05-30 09:54:38 -04:00
Niko Matsakis
2616581863 Refactor helper routines to be less tied to match syntax 2013-05-30 09:47:15 -04:00
Niko Matsakis
dcd84901c6 Remove TrByImplicitRef and source field on datums 2013-05-30 09:47:14 -04:00
Björn Steinbrink
1720d9f663 Remove a bunch of unnecessary allocations and copies 2013-05-30 11:49:04 +02:00
Patrick Walton
206ab89629 librustc: Stop reexporting the standard modules from prelude. 2013-05-29 19:04:53 -07:00
bors
844b5cff36 auto merge of #6794 : thestinger/rust/align_zero, r=pcwalton 
This is unlikely to alter optimized codegen much but there's no point in downgrading the known alignment to 1.
 2013-05-29 07:32:06 -07:00
bors
e3d0c1eb0e auto merge of #6731 : thomaslee/rust/issue-6575, r=pcwalton 
Fix for #6575. In the trans phase, rustc emits code for a function parameter that goes completely unused in the event the return type of the function in question happens to be an immediate.

This patch modifies rustc & parts of rustrt to ensure that the vestigial parameter is no longer present in compiled code.
 2013-05-28 17:37:57 -07:00
Daniel Micay
9ab2921300 use the type's alignment for generated memsets 2013-05-28 18:38:46 -04:00
bors
d7e1f08b21 auto merge of #6774 : alexcrichton/rust/silence-warnings, r=graydon 
Also as a bonus this fixes #6767
 2013-05-28 13:35:05 -07:00
Alex Crichton
b04c40bb1c Silence various warnings throughout test modules 2013-05-28 15:27:35 -05:00
Daniel Micay
accc5272f8 noalias on all &mut parameters is too coarse 
it can alias `&const` and `@mut`
 2013-05-28 13:05:50 -04:00
bors
b738b5766e auto merge of #6754 : thestinger/rust/noalias, r=nikomatsakis 
The compiler guarantees that there are no other references to a unique pointer when it's passed by-value to a function.

The existence of the header and annihilator don't matter since it's not relevant to the call:

> For a call to the parent function, dependencies between memory references from before or after the call and from those during the call are “irrelevant” to the noalias keyword for the arguments and return value used in that call.

@graydon's tracing garbage collector stores the metadata outside of the boxes, so that won't be a problem. I'm unsure if updating the header while inside a function where it's marked as `noalias` would be a problem anyway since you never actually read or write to the header.

@nikomatsakis: r?
 2013-05-28 02:59:03 -07:00
Tom Lee
b7f71e1ee6 Implementing suggestions from @nikomatsakis 2013-05-27 19:34:25 -07:00
bors
2061ce9aff auto merge of #6741 : pcwalton/rust/intra-crate-start, r=graydon 
r? @brson
 2013-05-27 18:26:04 -07:00
Tom Lee
67283eaad2 Omit unused implicit argument if return type is immediate. 2013-05-27 17:13:01 -07:00
bors
dbc57584bd auto merge of #6724 : thestinger/rust/swap_fast, r=thestinger 
Passing higher alignment values gives the optimization passes more freedom since it can copy in larger chunks. This change results in rustc outputting the same post-optimization IR as clang for swaps and most copies excluding the lack of information about padding.

Code snippet:

```rust
#[inline(never)]
fn swap<T>(x: &mut T, y: &mut T) {
    util::swap(x, y);
}
```

Original IR (for `int`):

```llvm
define internal fastcc void @_ZN9swap_283417_a71830ca3ed2d65d3_00E(i64*, i64*) #1 {
static_allocas:
  %2 = icmp eq i64* %0, %1
  br i1 %2, label %_ZN4util9swap_283717_a71830ca3ed2d65d3_00E.exit, label %3

; <label>:3                                       ; preds = %static_allocas
  %4 = load i64* %0, align 1
  %5 = load i64* %1, align 1
  store i64 %5, i64* %0, align 1
  store i64 %4, i64* %1, align 1
  br label %_ZN4util9swap_283717_a71830ca3ed2d65d3_00E.exit

_ZN4util9swap_283717_a71830ca3ed2d65d3_00E.exit:  ; preds = %3, %static_allocas
  ret void
}
```

After #6710:

```llvm
define internal fastcc void @_ZN9swap_283017_a71830ca3ed2d65d3_00E(i64* nocapture, i64* nocapture) #1 {
static_allocas:
  %2 = load i64* %0, align 1
  %3 = load i64* %1, align 1
  store i64 %3, i64* %0, align 1
  store i64 %2, i64* %1, align 1
  ret void
}
```

After this change:

```llvm
define internal fastcc void @_ZN9swap_283017_a71830ca3ed2d65d3_00E(i64* nocapture, i64* nocapture) #1 {
static_allocas:
  %2 = load i64* %0, align 8
  %3 = load i64* %1, align 8
  store i64 %3, i64* %0, align 8
  store i64 %2, i64* %1, align 8
  ret void
}
```

Another example:

```rust
#[inline(never)]
fn set<T>(x: &mut T, y: T) {
    *x = y;
}
```

Before, with `(int, int)` (align 1):

```llvm
define internal fastcc void @_ZN8set_282517_8fa972e3f9e451983_00E({ i64, i64 }* nocapture, { i64, i64 }* nocapture) #1 {
static_allocas:
  %2 = bitcast { i64, i64 }* %1 to i8*
  %3 = bitcast { i64, i64 }* %0 to i8*
  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %3, i8* %2, i64 16, i32 1, i1 false)
  ret void
}
```

After, with `(int, int)` (align 8):

```llvm
define internal fastcc void @_ZN8set_282617_8fa972e3f9e451983_00E({ i64, i64 }* nocapture, { i64, i64 }* nocapture) #1 {
static_allocas:
  %2 = bitcast { i64, i64 }* %1 to i8*
  %3 = bitcast { i64, i64 }* %0 to i8*
  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %3, i8* %2, i64 16, i32 8, i1 false)
  ret void
}
```
 2013-05-27 15:56:08 -07:00
Seo Sanghyeon
8f80323f09 Remove unnecessary allocations flagged by lint 2013-05-28 03:14:44 +09:00
Daniel Micay
c302010ef0 mark unique pointer parameters as noalias 
Closes #6749
 2013-05-26 14:11:30 -04:00
Daniel Micay
58d6864ad7 add an align parameter to call_memcpy 2013-05-26 10:26:04 -04:00
Daniel Micay
d9c0f0f188 add memset32/memset64 2013-05-26 10:26:03 -04:00
Daniel Micay
cf8e9f9aec make the memcpy/memmove intrinsics higher-level 
This allows them to make use of the type's alignment, instead of being
pessimistic and assuming it is only 1.
 2013-05-26 10:26:03 -04:00
James Miller
2c2346e3d4 Mark &mut parameters as noalias 2013-05-26 17:40:07 +12:00
Patrick Walton
cf34f9f9a9 librustc: Allow intra-crate start functions, for runtimeless operation. 2013-05-25 18:20:33 -07:00
bors
ed9a793d24 auto merge of #6706 : brson/rust/glue, r=catamorphism 
Instead of `glue_drop1234` it's `Type::<hash>::glue_drop1234`

Haven't done any performance testing.
 2013-05-23 23:13:46 -07:00
bors
212d6a2f61 auto merge of #6710 : thestinger/rust/swap, r=catamorphism 2013-05-23 22:04:40 -07:00
Daniel Micay
7d2f836065 add memcpy intrinsic to mirror memmove 2013-05-23 22:29:30 -04:00
bors
a776d65b4d auto merge of #6690 : erickt/rust/cleanup-warnings, r=brson 
Simple patch series to fix up all the warnings a rustc compile is giving at the moment. It also fixes a NOTE in `to_bytes.rs` to remove the `to_bytes::iter_bytes_<N>` functions.
 2013-05-23 18:10:36 -07:00
Erick Tryzelaar
9635b30837 cleanup warnings from librustc 2013-05-23 17:57:07 -07:00
Erick Tryzelaar
1965d72957 core: remove iter_bytes helper functions 2013-05-23 17:48:16 -07:00
Brian Anderson
7f642f3d85 rustc: Give glue symbols meaningful names 
Instead of `glue_drop1234` it's `Type::<hash>::glue_drop1234`

Haven't done any performance testing.
 2013-05-23 17:01:45 -07:00
Brian Anderson
d213443a67 rustc: Check for null before dropping ~objects. #5192 2013-05-23 15:33:34 -07:00
Patrick Walton
c532e033c9 librustc: Change std to extra throughout libsyntax and librustc 2013-05-22 21:57:08 -07:00
Patrick Walton
f3723cf7c4 libextra: Rename the actual metadata names of libcore to libstd and libstd to libextra 2013-05-22 21:57:07 -07:00
Patrick Walton
211d038abc librustc: Make ~Trait two words by storing the type descriptor in the vtable. 2013-05-22 21:57:03 -07:00
Patrick Walton
08e561ae70 librustc: Disable borrow check debugging even when rustc is compiled with -O0. 
This improves -O0 compile times dramatically.
 2013-05-22 21:57:02 -07:00
bors
1d3e84c5d6 auto merge of #6669 : yjh0502/rust/fix_6209, r=graydon 
Fix issue #6209, and some related issues about constant expression
 - unmatched type between arms
 - unmatched type in range
 2013-05-22 18:01:36 -07:00
Corey Richardson
e64339645b Implement static_assert attribute 
This verifies that a static item evaluates to true, at compile time.
 2013-05-22 13:13:24 -04:00
Jihyun Yu
f8af2b50ee fix issue #6209 2013-05-22 14:06:25 +09:00
Tim Chevalier
8c68c4a52c rustc: Don't generate code for unreachable expressions 
The way we deal with unreachable expressions in trans is pretty ad hoc,
but this at least doesn't make it worse, and eliminates the LLVM
assertion failure reported in #5741.
 2013-05-21 13:15:48 -07:00
bors
5a3e320514 auto merge of #6647 : alexcrichton/rust/unnecessary-alloc, r=graydon 
This adds a lint mode for detecting unnecessary allocations on the heap. This isn't super fancy, currently it only has two rules

1. For a function's arguments, if you allocate a `[~|@]str` literal, when the type of the argument is a `&str`, emit a warning.
2. For the same case, emit warnings for boxed vectors when slices are required.

After adding the lint, I rampaged through the libraries and removed all the unnecessary allocations I could find.
 2013-05-20 23:55:20 -07:00
Brian Anderson
474d9983be rustllvm: Use target alignment for atomic load/store 2013-05-20 17:28:06 -07:00
Alex Crichton
82fa0018c8 Remove all unnecessary allocations (as flagged by lint) 2013-05-20 16:10:40 -05:00
bors
2e6cda254a auto merge of #6635 : brson/rust/snapshot, r=brson 2013-05-20 02:46:36 -07:00
bors
ab46a38039 auto merge of #6632 : steveklabnik/rust/remove_more_warnings, r=thestinger 
With this, the build is almost 100% warning free.

One more can be fixed after the next snapshot, and there's one other that I filed an issue about already.
 2013-05-20 01:37:39 -07:00