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Author SHA1 Message Date
Dan Gohman
36585ddc4f Wasm control stack entries only need the number of return types. 
This eliminates heap-allocated vectors which stored the actual types.
 2017-09-25 13:05:29 -07:00
Dan Gohman
55e48ce7aa Simplify translate_type's return type. 2017-09-25 13:05:29 -07:00
Dan Gohman
14d6d1117d Clean up unneeded '&'s. 2017-09-25 13:05:29 -07:00
Jakob Stoklund Olesen
8deca67968 Add legalization patterns for fabs and fneg. 
These sign bit manipulations need to use a -0.0 floating point constant
which we didn't have a way of materializing previously.

Add a ieee32.bits(0x...) syntax to the Python AST nodes that creates am
f32 immediate value with the exact requested bitwise representation.
 2017-09-25 12:15:33 -07:00
Jakob Stoklund Olesen
ba1c50d6c1 Test WebAssembly floating point constants. 
f64.const does not yet work on 32-bit Intel.
 2017-09-25 11:06:18 -07:00
Jakob Stoklund Olesen
fdb97da21b Implement a poor man's jump table. 
We will eventually support real jump tables, but for now just expand
br_table into a sequence of conditional branches.
 2017-09-25 10:56:14 -07:00
Dan Gohman
e64eb79aaf Fix dependency paths. wasmstandalone no longer depends on out-of-tree patches. 2017-09-23 15:38:38 -07:00
Dan Gohman
666d565fd4 Clean up unused imports. 2017-09-23 15:38:38 -07:00
Dan Gohman
0c78a2f298 Import the wasm2obj experiment and minimally update it. 2017-09-23 15:38:38 -07:00
Dan Gohman
06f0b00c2d Add an assert on an implemented feature rather than letting it silently fail. 2017-09-22 16:26:43 -07:00
Dan Gohman
64d596005c Reduce the extent of unsafe code. 2017-09-22 16:21:25 -07:00
Dan Gohman
ecd746718b Remove comments about manually saving callee-saved registers. 
Even though Cretonne doesn't implement callee-saved registers yet,
it will, so we shouldn't need manual save/restore code when calling it.
 2017-09-22 16:17:08 -07:00
Dan Gohman
4c5f584d01 Use debug_assert_eq! where applicable. 2017-09-22 16:13:04 -07:00
Dan Gohman
b583d75c7a Fix redundant borrows. 2017-09-22 16:11:11 -07:00
Dan Gohman
382415ed0c Fix a useless format!. 2017-09-22 16:09:10 -07:00
Jakob Stoklund Olesen
29dfcf5dfb Add spill/fill encodings for Intel ISAs. 
To begin with, these are catch-all encodings with a SIB byte and a
32-bit displacement, so they can access any stack slot via both the
stack pointer and the frame pointer.

In the future, we will add encodings for 8-bit displacements as well as
EBP-relative references without a SIB byte.
 2017-09-22 16:05:26 -07:00
Dan Gohman
b89277d9ce Rename "wast" to "wat". 2017-09-22 15:57:32 -07:00
Dan Gohman
cdffc1b50a Roughly update for the recent Cretonne API changes. 
Everything builds and simple modules run, though there's still lots more
to do.
 2017-09-22 15:56:18 -07:00
Jakob Stoklund Olesen
76eb7df9f0 Add an isa::StackRef type. 
This contains encoding details for a stack reference: The base register
and offset to use in the specific instruction encoding.

Generate StackRef objects called in_stk0 etc for the binemit recipe
code. All binemit recipes need to compute base pointer offsets for stack
references, so have the automatically generated code do it.
 2017-09-22 13:34:33 -07:00
Jakob Stoklund Olesen
2946cc54d3 Add more trap codes. 
These are codes that come up naturally when translating WebAssembly and
legalizing the Cretonne instruction set.
 2017-09-22 08:51:55 -07:00
Angus Holder
7fbf1cb810 Revert accidental change 2017-09-22 07:54:26 -07:00
Angus Holder
b003605132 Adapt intel to be able to correctly choose compressed instruction encodings: create a register class to identify the lower 8 registers, omit unnecessary REX prefixes, and fix the tests 2017-09-22 07:54:26 -07:00
Angus Holder
3b66c0be40 Emit compressed instruction encodings for instructions where constraints allow 2017-09-22 07:54:26 -07:00
Jakob Stoklund Olesen
2d4c860187 Convert legalizer::split and generated legalization code to FuncCursor. 2017-09-21 17:05:51 -07:00
Jakob Stoklund Olesen
a9acbd1afd Convert the legalizer/boundary module to FuncCursor. 
This is a larger refactoring because all the changes need to be done
together. Either you pass a Function reference around, or you pass
around references to the parts. There is no in between.
 2017-09-21 16:43:47 -07:00
Jakob Stoklund Olesen
85e4e9f511 Assign source locations when translating WebAssembly to Cretonne. 
The source locations are byte code offsets relative to the beginning of
the function.
 2017-09-21 14:37:54 -07:00
Jakob Stoklund Olesen
4d4da2dc60 Add source location support to FuncCursor and EncCursor. 
A cursor now also remembers a current source location which will be
assigned to all new instructions created with the cursor.

The old layout::Cursor can't support source locations because it doesn't
have a reference to the full ir::Function.
 2017-09-21 14:37:54 -07:00
Jakob Stoklund Olesen
b2a314a229 Add per-instruction source locations to the Cretonne IR. 
Source locations are opaque 32-bit entities that can be used to
represent WebAssembly byte-code positions or some other source
identifier.
 2017-09-21 14:24:26 -07:00
Dan Gohman
16eb689dd1 Use Self instead of repeating the type name. 2017-09-21 14:21:30 -07:00
Dan Gohman
e5e4b59683 Tidy up some asserts. 2017-09-21 14:21:30 -07:00
Dan Gohman
e75558b800 Fix spelling of "adjustment". 2017-09-21 14:21:30 -07:00
Dan Gohman
dda8293668 Restructure code to avoid a heap allocation. 2017-09-21 14:21:30 -07:00
Dan Gohman
ff18772d0e Avoid a heap allocation. 2017-09-21 14:21:30 -07:00
Dan Gohman
22b769b716 Convert use_var and predecessors_lookup into a state machine to avoid recursion. 2017-09-21 14:21:30 -07:00
Dan Gohman
9cda4eacde Minor refactor. 2017-09-21 14:21:30 -07:00
Dan Gohman
df5ba8bbba Correct a comment. 2017-09-21 14:21:30 -07:00
Dan Gohman
f524977920 Factor some logic out of seal_ebb_header_block into parts. 
This allows append_jump_argument to call just the part that it needs
instead of the whole of seal_ebb_header_block, which is a nice cleanup
on its own, and it also eliminates a cycle from the static call graph.
 2017-09-21 14:21:30 -07:00
Jakob Stoklund Olesen
218959ff65 Convert more tests to FuncCursor. 2017-09-21 13:30:00 -07:00
Jakob Stoklund Olesen
8e93aa7ce7 Remove layout::Cursor from the legalizer::split API. 
We still use the cursor internally, but don't require callers to use it
too.
 2017-09-21 13:07:17 -07:00
Jakob Stoklund Olesen
1cd91b6f30 Eliminate layout::Cursor from cton_frontend. 
Replace all uses with a FuncCursor.

Avoid the anti-pattern of passing parts of a function around as
independent references.
 2017-09-21 12:24:27 -07:00
Jakob Stoklund Olesen
03dee5e442 Replace some uses of layout::Cursor with FuncCursor. 
The layout::Cursor is unfortunate because it doesn't reference the whole
function.
 2017-09-21 11:27:15 -07:00
Dan Gohman
ed6630dc02 Move verify calls back into Context, using FlagsOrIsa. 
With FlagsOrIsa, we can pass around the information we need to run
the verifier from the Context even when a TargetIsa is not available.
 2017-09-20 16:42:13 -07:00
Dan Gohman
f80ee7af39 Add a "host" crate for autodetecting the host. (#159) 
* Add a "native" crate for autodetecting the host.

* Remove the redundant .gitignore.

* Use the proper builder for enabling subtarget flags.
 2017-09-20 16:14:26 -07:00
Jakob Stoklund Olesen
8def91b4ad Remove the unused Nullary instruction format. 
This format was only used by the trap instruction which has its own
format now.
 2017-09-20 15:59:13 -07:00
Jakob Stoklund Olesen
e8723be33f Add trap codes to the Cretonne IL. 
The trap and trapz/trapnz instructions now take a trap code immediate
operand which indicates the reason for trapping.
 2017-09-20 15:50:02 -07:00
Jakob Stoklund Olesen
0f21fd342a Remove the HeapLoad/HeapStore instruction formats. 
These formats are not used any longer after the heap_load and heap_store
instructions were replaced by heap_addr.

Also drop the Uoffset32 immediate operand type which isn't used either.
 2017-09-20 15:43:25 -07:00
Dan Gohman
d3f3fdf5af Remove a redundant .gitignore file. 2017-09-20 15:35:26 -07:00
Dan Gohman
ce94a3fa39 Use ScopedHashMap in simple_gvn. 
This avoids effectively ending up with most of a function body
stored in the hash map at once by removing elements promptly when
they go out of scope.
 2017-09-20 14:21:44 -07:00
Dan Gohman
6710216e96 Add next_inst and prev_inst helper functions to Layout. 2017-09-20 12:38:13 -07:00
Dan Gohman
42af6d59bf Add a ScopedHashMap class, for use in a future GVN implementation. 2017-09-20 11:28:55 -07:00