Commit Graph

567 Commits

Author SHA1 Message Date
Dan Gohman 38b42b4a95 [WebAssembly] Define a table of function signatures for runtime library calls.
LLVM CodeGen emits references to external symbols that are never declared in
LLVM IR level, so they have no declared signature. However, WebAssembly requires
all functions be declared with signatures. This patch adds a table for providing
signatures for known runtime libcalls that will be used in subsequent patches to
emit declarations for such functions.

llvm-svn: 295857
2017-02-22 18:34:16 +00:00
Dan Gohman a63e8eb138 [WebAssembly] Configure codegen to legalize f16 values.
llvm-svn: 295850
2017-02-22 16:28:00 +00:00
Dan Gohman 18eafb6c68 [WebAssembly] Add skeleton MC support for the Wasm container format
This just adds the basic skeleton for supporting a new object file format.
All of the actual encoding will be implemented in followup patches.

Differential Revision: https://reviews.llvm.org/D26722

llvm-svn: 295803
2017-02-22 01:23:18 +00:00
Dan Gohman 4a5496902c [WebAssembly] Add a cast to void to fix an unused private member warning, for now.
llvm-svn: 295327
2017-02-16 15:21:37 +00:00
Dan Gohman dfe6ce7abd [WebAssembly] Remove old experimental disassemler code.
Remove support for disassembling an old experimental wasm binary format, which
is no longer in use anywhere.

llvm-svn: 294809
2017-02-11 00:02:23 +00:00
Dan Gohman df4f4d45f0 [WebAssembly] Pass an MCContext to WebAssemblyMCCodeEmitter. NFC.
llvm-svn: 294679
2017-02-10 00:14:42 +00:00
Dan Gohman b6afd2070a [WebAssembly] Refactor void return peephole using MaybeRewriteToFallthrough. NFC.
llvm-svn: 294652
2017-02-09 23:19:03 +00:00
Dan Gohman b89f2d3d92 [WebAssembly] Add instruction definitions for drop and get/set_global.
llvm-svn: 293922
2017-02-02 19:29:44 +00:00
Richard Trieu 3de487b2e8 [WebAssembly] Use print instead of dump method.
This fixes non-debug non-assert builds after r293359.

llvm-svn: 293368
2017-01-28 03:23:49 +00:00
Derek Schuff 4b320b72a2 [WebAssembly] Update LibFunc::Func -> LibFunc
Fixes compile failures after r292848

llvm-svn: 292857
2017-01-24 00:01:18 +00:00
Dan Gohman a99b717f52 [WebAssembly] Don't create bitcast-wrappers for varargs.
WebAssembly varargs functions use a significantly different ABI than
non-varargs functions, and the current code in
WebAssemblyFixFunctionBitcasts doesn't handle that difference. For now,
just avoid creating wrapper functions in the presence of varargs.

llvm-svn: 292645
2017-01-20 20:50:29 +00:00
Dan Gohman 73e3aaa61e [WebAssembly] Update grow_memory's return type.
The grow_memory instruction now returns the previous memory size. Add the
return type to the LLVM intrinsic.

llvm-svn: 292322
2017-01-18 01:02:45 +00:00
Diana Picus 116bbab4e4 [CodeGen] Rename MachineInstrBuilder::addOperand. NFC
Rename from addOperand to just add, to match the other method that has been
added to MachineInstrBuilder for adding more than just 1 operand.

See https://reviews.llvm.org/D28057 for the whole discussion.

Differential Revision: https://reviews.llvm.org/D28556

llvm-svn: 291891
2017-01-13 09:58:52 +00:00
Mohammed Agabaria 2c96c43388 [X86] updating TTI costs for arithmetic instructions on X86\SLM arch.
updated instructions:
pmulld, pmullw, pmulhw, mulsd, mulps, mulpd, divss, divps, divsd, divpd, addpd and subpd.

special optimization case which replaces pmulld with pmullw\pmulhw\pshuf seq. 
In case if the real operands bitwidth <= 16.

Differential Revision: https://reviews.llvm.org/D28104 

llvm-svn: 291657
2017-01-11 08:23:37 +00:00
Derek Schuff 7acb42a41a [WebAssembly] Only RAUW a constant once in FixFunctionBitcasts
When we collect 2 uses of a function in FindUses and then RAUW when we
visit the first, we end up visiting the wrapper (because the second was
RAUW'd).  We still want to use RAUW instead of just Use->set() because
it has special handling for Constants, so this patch just ensures that
only one use of each constant is added to the work list.

Differential Revision: https://reviews.llvm.org/D28504

llvm-svn: 291603
2017-01-10 21:59:53 +00:00
Dan Gohman 6055fbae62 [WebAssembly] Add return type annotations in fast isel.
llvm-svn: 291498
2017-01-09 23:09:38 +00:00
Dan Gohman 2aae5dc713 [WebAssembly] Fix the opcode values for i64.eq and i64.ne.
llvm-svn: 291424
2017-01-09 06:21:28 +00:00
Dan Gohman 0e2ceb8121 [WebAssembly] Don't abort on code with UB.
Gracefully leave code that performs function-pointer bitcasts implying
non-trivial pointer conversions alone, rather than aborting, since it's
just undefined behavior.

llvm-svn: 291326
2017-01-07 01:50:01 +00:00
Dan Gohman d5eda35557 [WebAssembly] Move a SmallVector to a more specific scope. NFC.
llvm-svn: 291324
2017-01-07 01:31:18 +00:00
Dan Gohman 1b637458f6 [WebAssembly] Add a pass to create wrappers for function bitcasts.
WebAssembly requires caller and callee signatures to match exactly. In LLVM,
there are a variety of circumstances where signatures may be mismatched in
practice, and one can bitcast a function address to another type to call it
as that type. This patch adds a pass which replaces bitcasted function
addresses with wrappers to replace the bitcasts.

This doesn't catch everything, but it does match many common cases.

llvm-svn: 291315
2017-01-07 00:34:54 +00:00
Dan Gohman 00d734d89b [WebAssembly] Annotate call and load/store immediates.
These will be used to guide the binary encoding of these immediates.

llvm-svn: 290412
2016-12-23 03:23:52 +00:00
Dan Gohman 8b4340a5dd [WebAssembly] Add an "explicit" keyword to a constructor.
llvm-svn: 290345
2016-12-22 16:03:02 +00:00
Dan Gohman 207ed22660 [WebAssembly] Don't use variadic operand indices in the MCOperandInfo array.
llvm-svn: 290344
2016-12-22 16:00:55 +00:00
Dan Gohman 728926ac59 [WebAssembly] Don't old negative load/store offsets in fast-isel.
WebAssembly's load/store offsets are unsigned and don't wrap, so it's not
valid to fold in a negative offset.

llvm-svn: 290342
2016-12-22 15:15:10 +00:00
Dan Gohman a2b9b349e7 [WebAssembly] Fix the opcode value for i64.rotr.
llvm-svn: 290281
2016-12-21 23:09:42 +00:00
Dan Gohman 66caac5735 [WebAssembly] Eliminate an ad-hoc command-line argument.
Use the target triple to determine whether to run the explicit-locals
pass, rather than using a separate command-line argument.

llvm-svn: 288602
2016-12-03 23:00:12 +00:00
Dan Gohman f295cc8fb5 [WebAssembly] Fix a compiler warning. NFC.
Fix a warning about a comparison between signed and unsigned integer
expressions.

llvm-svn: 288532
2016-12-02 20:13:05 +00:00
Peter Collingbourne ab85225be4 IR: Change the gep_type_iterator API to avoid always exposing the "current" type.
Instead, expose whether the current type is an array or a struct, if an array
what the upper bound is, and if a struct the struct type itself. This is
in preparation for a later change which will make PointerType derive from
Type rather than SequentialType.

Differential Revision: https://reviews.llvm.org/D26594

llvm-svn: 288458
2016-12-02 02:24:42 +00:00
Derek Schuff 7747d703e3 [WebAssembly] Emit .import_global assembler directives
Support a new assembler directive, .import_global, to declare imported
global variables (i.e. those with external linkage and no
initializer). The linker turns these into wasm imports.

Patch by Jacob Gravelle

Differential Revision: https://reviews.llvm.org/D26875

llvm-svn: 288296
2016-12-01 00:11:15 +00:00
Chris Bieneman 05c279fc4b [CMake] NFC. Updating CMake dependency specifications
This patch updates a bunch of places where add_dependencies was being explicitly called to add dependencies on intrinsics_gen to instead use the DEPENDS named parameter. This cleanup is needed for a patch I'm working on to add a dependency debugging mode to the build system.

llvm-svn: 287206
2016-11-17 04:36:50 +00:00
Dan Gohman e81021a5cb [WebAssembly] Convert stackified IMPLICIT_DEF into constant 0.
Since IMPLIFIT_DEF instructions are omitted in the output, when the output
of an IMPLICIT_DEF instruction is stackified, the resulting register lacks
an explicit push, leading to a push/pop mismatch. Fix this by converting
such IMPLICIT_DEFs into CONST_I32 0 instructions so that they have explicit
pushes.

llvm-svn: 286274
2016-11-08 19:40:38 +00:00
Derek Schuff 0d41b7b3f3 [WebAssembly] Emit a BasePointer when we have overly-aligned stack objects
Because we shift the stack pointer by an unknown amount, we need an
additional pointer. In the case where we have variable-size objects
as well, we can't reuse the frame pointer, thus three pointers.

Patch by Jacob Gravelle

Differential Revision: https://reviews.llvm.org/D26263

llvm-svn: 286160
2016-11-07 22:00:48 +00:00
Dan Gohman 68a423bf84 [WebAssembly] Update the README.txt.
Update the README.txt with newer information, add a link to the Emscripten
page explaining the current easiest way to use the LLVM wasm backend, and
mention that other ways of using the LLVM wasm backend are in development.

llvm-svn: 285215
2016-10-26 17:44:09 +00:00
Dan Gohman f50d964bdb [WebAssembly] Add immediate fields to call_indirect and memory operators.
call_indirect, grow_memory, and current_memory now have immediate
operands in the 0xd binary encoding.

llvm-svn: 285085
2016-10-25 16:55:52 +00:00
Benjamin Kramer 7df3043db3 Fix an unused warning in WebAssemblyInstPrinter with NDEBUG.
Patch by Sam McCall!

Differential Revision: https://reviews.llvm.org/D25934

llvm-svn: 285055
2016-10-25 09:08:50 +00:00
Dan Gohman 48abaa9c74 [WebAssembly] Reorder load/store operands to match binary encoding.
The p2align operand of a load/store is encoded before the offset
operand; reorder the MachineInstr operands accordingly.

llvm-svn: 285044
2016-10-25 00:17:11 +00:00
Dan Gohman 3acb187d95 [WebAssembly] Implement more WebAssembly binary encoding.
This changes locals from being declared by the emitLocal hook in
WebAssemblyTargetStreamer, rather than with an instruction. After exploring
the infastructure in LLVM more, this seems to make more sense since
declaring locals doesn't use an encoded opcode.

This also adds more 0xd opcodes, type encodings, and miscellaneous
binary encoding bits.

llvm-svn: 285040
2016-10-24 23:27:49 +00:00
Dan Gohman 5d3391f859 [WebAssembly] Fix a broken URL.
llvm-svn: 285017
2016-10-24 20:35:17 +00:00
Dan Gohman 4becc58587 [WebAssembly] Define the `end` opcode value.
CFGStackify differentiates between END_LOOP and END_BLOCK, but wasm
itself doesn't. For now, just use the same opcode for both.

llvm-svn: 285016
2016-10-24 20:32:04 +00:00
Dan Gohman c968297b95 [WebAssembly] Update opcode values according to recent spec changes.
This corresponds to the "0xd" opcode renumbering.

llvm-svn: 285014
2016-10-24 20:21:49 +00:00
Dan Gohman 4fc4e42dea [WebAssembly] Add an option to make get_local/set_local explicit.
This patch adds a pass, controlled by an option and off by default for
now, for making implicit get_local/set_local explicit. This simplifies
emitting wasm with MC.

Differential Revision: https://reviews.llvm.org/D25836

llvm-svn: 285009
2016-10-24 19:49:43 +00:00
Derek Schuff 6f69783f1f [WebAssembly] Fix for 0xc call_indirect changes
Summary:
Need to reorder the operands to have the callee as the last argument.
Adds a pseudo-instruction, and a pass to lower it into a real
call_indirect.

This is the first of two options for how to fix the problem.

Reviewers: dschuff, sunfish

Subscribers: jfb, beanz, mgorny, llvm-commits

Differential Revision: https://reviews.llvm.org/D25708

llvm-svn: 284840
2016-10-21 16:38:07 +00:00
Benjamin Kramer 2a8bef8769 Do a sweep over move ctors and remove those that are identical to the default.
All of these existed because MSVC 2013 was unable to synthesize default
move ctors. We recently dropped support for it so all that error-prone
boilerplate can go.

No functionality change intended.

llvm-svn: 284721
2016-10-20 12:20:28 +00:00
Daniel Jasper 0dea246b4f Fix WebAssembly build after r283702.
llvm-svn: 283723
2016-10-10 06:49:55 +00:00
Mehdi Amini f42454b94b Move the global variables representing each Target behind accessor function
This avoids "static initialization order fiasco"

Differential Revision: https://reviews.llvm.org/D25412

llvm-svn: 283702
2016-10-09 23:00:34 +00:00
Dan Gohman 2726b88c03 [WebAssemby] Implement block signatures.
Per spec changes, this implements block signatures, and adds just enough
logic to produce correct block signatures at the ends of functions.

Differential Revision: https://reviews.llvm.org/D25144

llvm-svn: 283503
2016-10-06 22:29:32 +00:00
Dan Gohman 3a643e8d46 [WebAssembly] Remove loop's bottom label.
Per spec changes, loop constructs no longer have a bottom label.

https://reviews.llvm.org/D25118

llvm-svn: 283502
2016-10-06 22:10:23 +00:00
Dan Gohman 7f1bdb2e02 [WebAssembly] Remove the output operand from stores.
Per spec changes, store instructions in WebAssembly no longer have a return
value. Update the instruction descriptions.

Differential Revision: https://reviews.llvm.org/D25122

llvm-svn: 283501
2016-10-06 22:08:28 +00:00
Dan Gohman 5a68ec7f09 [WebAssembly] Add binary-encoding opcode values to instruction descriptions.
llvm-svn: 283389
2016-10-05 21:24:08 +00:00
Dan Gohman e040533ece [WebAssembly] Update to more stack-machine-oriented terminology.
WebAssembly has officially switched from being an AST to being a stack
machine. Update various bits of terminology and README.md entries
accordingly.

llvm-svn: 283154
2016-10-03 22:43:53 +00:00
Dan Gohman ffc184bb1d [WebAssemby] Clean up an obsolete comment.
The comment is present inside the body of GetVRegDef.

llvm-svn: 283153
2016-10-03 22:32:21 +00:00
Dan Gohman 16fa0d8159 [WebAssembly] Delete an unused function. NFC.
llvm-svn: 283150
2016-10-03 22:06:28 +00:00
Dan Gohman 9850e87784 [WebAssembly] Fix indentation. NFC.
llvm-svn: 283147
2016-10-03 21:33:09 +00:00
Dan Gohman 4b8e8becf6 [WebAssembly] Rename OPERAND_FP32IMM to OPERAND_F32IMM.
WebAssembly documentation consistently says "f32" rather than "fp32" to
describe 32-bit floating-point.

llvm-svn: 283146
2016-10-03 21:31:31 +00:00
Mehdi Amini 117296c0a0 Use StringRef in Pass/PassManager APIs (NFC)
llvm-svn: 283004
2016-10-01 02:56:57 +00:00
Derek Schuff e9e6891b2d [WebAssembly] Make register stackification more conservative
Register stackification currently checks VNInfo for changes. Make that
more accurate by testing each intervening instruction for any other defs
to the same virtual register.

Patch by Jacob Gravelle

Differential Revision: https://reviews.llvm.org/D24942

llvm-svn: 282886
2016-09-30 18:02:54 +00:00
Derek Schuff 92d300eb8f [WebAssembly] Use the frame pointer instead of the stack pointer
When we have dynamic allocas we have a frame pointer, and
when we're lowering frame indexes we should make sure we use it.

Patch by Jacob Gravelle

Differential Revision: https://reviews.llvm.org/D24889

llvm-svn: 282442
2016-09-26 21:18:03 +00:00
Matt Arsenault 1b9fc8ed65 Finish renaming remaining analyzeBranch functions
llvm-svn: 281535
2016-09-14 20:43:16 +00:00
Matt Arsenault e8e0f5cac6 Make analyzeBranch family of instruction names consistent
analyzeBranch was renamed to use lowercase first, rename
the related set to match.

llvm-svn: 281506
2016-09-14 17:24:15 +00:00
Matt Arsenault a2b036e88b AArch64: Use TTI branch functions in branch relaxation
The main change is to return the code size from
InsertBranch/RemoveBranch.

Patch mostly by Tim Northover

llvm-svn: 281505
2016-09-14 17:23:48 +00:00
Eric Liu c7e5a9ce17 Fix WebAssembly broken build related to interface change in r281172.
Reviewers: bkramer

Subscribers: jfb, llvm-commits, dschuff

Differential Revision: https://reviews.llvm.org/D24449

llvm-svn: 281201
2016-09-12 09:35:59 +00:00
Heejin Ahn 99bd16b34b [WebAssembly] Fix typos in comments
llvm-svn: 281131
2016-09-10 02:33:47 +00:00
Justin Lebar d98cf00c95 [CodeGen] Rename MachineInstr::isInvariantLoad to isDereferenceableInvariantLoad. NFC
Summary:
I want to separate out the notions of invariance and dereferenceability
at the MI level, so that they correspond to the equivalent concepts at
the IR level.  (Currently an MI load is MI-invariant iff it's
IR-invariant and IR-dereferenceable.)

First step is renaming this function.

Reviewers: chandlerc

Subscribers: MatzeB, jfb, llvm-commits

Differential Revision: https://reviews.llvm.org/D23370

llvm-svn: 281125
2016-09-10 01:03:20 +00:00
Benjamin Kramer ef0a45aaa5 [WebAssembly] Unbreak the build.
Not sure why ADL isn't working here.

llvm-svn: 280656
2016-09-05 12:06:47 +00:00
Derek Schuff a66ae923e4 [WebAssembly] Update known test failures
Fixed an issue with the experimental C headers

llvm-svn: 280498
2016-09-02 16:26:24 +00:00
Heejin Ahn c0f18172f5 [WebAssembly] Add asm.js-style setjmp/longjmp handling for wasm (reland r280302)
Summary: This patch adds asm.js-style setjmp/longjmp handling support for WebAssembly. It also uses JavaScript's try and catch mechanism.

Reviewers: jpp, dschuff

Subscribers: jfb, dschuff

Differential Revision: https://reviews.llvm.org/D24121

llvm-svn: 280415
2016-09-01 21:05:15 +00:00
Heejin Ahn 10a7086700 Revert "Add asm.js-style setjmp/longjmp handling for wasm"
This reverts commit r280302, it broke the integration tests.

llvm-svn: 280329
2016-09-01 00:44:37 +00:00
Heejin Ahn 23d57103a4 Add asm.js-style setjmp/longjmp handling for wasm
Summary: This patch adds asm.js-style setjmp/longjmp handling support for WebAssembly. It also uses JavaScript's try and catch mechanism.

Reviewers: jpp, dschuff

Subscribers: jfb, dschuff

Differential Revision: https://reviews.llvm.org/D23928

llvm-svn: 280302
2016-08-31 22:40:34 +00:00
Derek Schuff 1b258d313c [WebAssembly] Disable folding of GA+reg into load/store constant offsets
Summary:
If the register has a negative value then unsigned overflow will occur;
this case is sometimes even created intentionally by LSR. For now
disable GA+reg folding. Fixes PR29127

Differential Revision: https://reviews.llvm.org/D24053

llvm-svn: 280285
2016-08-31 20:27:20 +00:00
Matthias Braun 1eb473680a MachineFunctionProperties/MIRParser: Rename AllVRegsAllocated->NoVRegs, compute it
Rename AllVRegsAllocated to NoVRegs. This avoids the connotation of
running after register and simply describes that no vregs are used in
a machine function. With that we can simply compute the property and do
not need to dump/parse it in .mir files.

Differential Revision: http://reviews.llvm.org/D23850

llvm-svn: 279698
2016-08-25 01:27:13 +00:00
Heejin Ahn b6cd5121b7 [WebAssembly] Change a comment line
Test for commit access.

llvm-svn: 279683
2016-08-24 22:53:00 +00:00
Michael Kuperstein 2bc3d4d46c [SelectionDAG] Rename fextend -> fpextend, fround -> fpround, frnd -> fround
The names of the tablegen defs now match the names of the ISD nodes.
This makes the world a slightly saner place, as previously "fround" matched
ISD::FP_ROUND and not ISD::FROUND.

Differential Revision: https://reviews.llvm.org/D23597

llvm-svn: 279129
2016-08-18 20:08:15 +00:00
Dan Gohman c9623db884 [WebAssembly] Disable the store-results optimization.
The WebAssemly spec removing the return value from store instructions, so
remove the associated optimization from LLVM.

This patch leaves the store instruction operands in place for now, so stores
now always write to "$drop"; these will be removed in a seperate patch.

llvm-svn: 279100
2016-08-18 17:51:27 +00:00
Derek Schuff ccdceda128 [WebAssembly] Refactor WebAssemblyLowerEmscriptenException pass for setjmp/longjmp
This patch changes the code structure of
WebAssemblyLowerEmscriptenException pass to support both exception
handling and setjmp/longjmp. It also changes the name of the pass and
the source file.

1. Change the file/pass name to WebAssemblyLowerEmscriptenExceptions ->
WebAssemblyLowerEmscriptenEHSjLj to make it clear that it supports both
EH and SjLj
2. List function / global variable names at the top so they
can be changed easily
3. Some cosmetic changes

Patch by Heejin Ahn

Differential Revision: https://reviews.llvm.org/D23588

llvm-svn: 279075
2016-08-18 15:27:25 +00:00
Dominic Chen a8a638292c [WebAssembly] Handle debug information and virtual registers without crashing (reland r278967)
Summary: Currently, enabling debug information when compiling for WebAssembly crashes the backend. This commit fixes these by skipping debug values in backend passes.

Reviewers: jfb, aprantl, dschuff, echristo

Subscribers: llvm-commits, dschuff, jfb, MatzeB, dexonsmith, yurydelendik, mehdi_amini

Differential Revision: https://reviews.llvm.org/D23635

llvm-svn: 279011
2016-08-17 23:42:27 +00:00
Duncan P. N. Exon Smith afdd8e541b Revert "[WebAssembly] Handle debug information and virtual registers without crashing"
This reverts commit r278967, since the new test is failing when you
don't build the WebAssembly target (most people, since it's
off-by-default).

llvm-svn: 278973
2016-08-17 20:41:50 +00:00
Dominic Chen 4326167a37 [WebAssembly] Handle debug information and virtual registers without crashing
Summary: Currently, enabling debug information when compiling for WebAssembly crashes the backend. This commit fixes these by skipping debug values in backend passes.

Reviewers: jfb, aprantl, dschuff, echristo

Subscribers: mehdi_amini, yurydelendik, dexonsmith, MatzeB, jfb, dschuff, llvm-commits

Differential Revision: https://reviews.llvm.org/D21808

llvm-svn: 278967
2016-08-17 20:11:03 +00:00
Benjamin Kramer 9bc1b230fd [WebAssembly] Plug MachineMemOperand leaks.
llvm-svn: 278545
2016-08-12 18:33:50 +00:00
David Majnemer c700490f48 Use the range variant of remove_if instead of unpacking begin/end
No functionality change is intended.

llvm-svn: 278475
2016-08-12 04:32:37 +00:00
Dominic Chen 4173fffa08 [WebAssembly] Cleanup trailing whitespace
Summary: Test for commit access.

Subscribers: jfb, dschuff

Differential Revision: https://reviews.llvm.org/D23392

llvm-svn: 278313
2016-08-11 04:10:56 +00:00
Derek Schuff 66641322ce [WebAssembly] Add -emscripten-cxx-exceptions-whitelist option
This patch adds -emscripten-cxx-exceptions-whitelist option to
WebAssemblyLowerEmscriptenExceptions pass. This options is the list of
function names in which Emscripten-style exception handling is enabled.
This is to support emscripten's EXCEPTION_CATCHING_WHITELIST which
exists because of the performance impact of emscripten's non-zero-cost
EH method.

Patch by Heejin Ahn

Differential Revision: https://reviews.llvm.org/D23292

llvm-svn: 278171
2016-08-09 22:37:00 +00:00
Derek Schuff 53b9af02c8 [WebAssembly] Fix bugs in WebAssemblyLowerEmscriptenExceptions pass
* Delete extra '_' prefixes from JS library function names. fixImports()
  function in JS glue code deals with this for wasm.
* Change command-line option names in order to be consistent with
  asm.js.
* Add missing lowering code for llvm.eh.typeid.for intrinsics
* Delete commas in mangled function names
* Fix a function argument attributes bug. Because we add the pointer to
  the original callee as the first argument of invoke wrapper, all
  argument attribute indices have to be incremented by one.

Patch by Heejin Ahn

Differential Revision: https://reviews.llvm.org/D23258

llvm-svn: 278081
2016-08-09 00:29:55 +00:00
Derek Schuff 732636d901 [WebAssembly] Check return value of getRegForValue in FastISel
Previously, FastISel for WebAssembly wasn't checking the return value of
`getRegForValue` in certain cases, which would generate instructions
referencing NoReg. This patch fixes this behavior.

Patch by Dominic Chen

Differential Revision: https://reviews.llvm.org/D23100

llvm-svn: 277742
2016-08-04 18:01:52 +00:00
Derek Schuff 5629ec141f [WebAssembly] Remove unnecessary subtarget checks in peephole pass
Leftover from D22686; the passes can handle all the instructions
unconditionally; only isel needs to care whether to generate them.

llvm-svn: 277549
2016-08-02 23:31:56 +00:00
Derek Schuff 39bf39f35c [WebAssembly] Initial SIMD128 support.
Kicks off the implementation of wasm SIMD128 support (spec:
https://github.com/stoklund/portable-simd/blob/master/portable-simd.md),
adding support for add, sub, mul for i8x16, i16x8, i32x4, and f32x4.

The spec is WIP, and might change in the near future.

Patch by João Porto

Differential Revision: https://reviews.llvm.org/D22686

llvm-svn: 277543
2016-08-02 23:16:09 +00:00
Dan Gohman c558fe203f [WebAssembly] Remove a README.txt entry that is now implemented.
llvm-svn: 277467
2016-08-02 14:53:44 +00:00
Derek Schuff c64d7655b2 [WebAssembly] Support CFI for WebAssembly target
Summary: This patch implements CFI for WebAssembly. It modifies the
LowerTypeTest pass to pre-assign table indexes to functions that are
called indirectly, and lowers type checks to test against the
appropriate table indexes. It also modifies the WebAssembly backend to
support a special ".indidx" assembly directive that propagates the table
index assignments out to the linker.

Patch by Dominic Chen

Differential Revision: https://reviews.llvm.org/D21768

llvm-svn: 277398
2016-08-01 22:25:02 +00:00
Derek Schuff f41f67d3d9 [WebAssembly] Add asm.js-style exception handling support
Summary: This patch includes asm.js-style exception handling support for
WebAssembly. The WebAssembly MVP does not have any support for
unwinding or non-local control flow. In order to support C++ exceptions,
emscripten currently uses JavaScript exceptions along with some support
code (written in JavaScript) that is bundled by emscripten with the
generated code.
This scheme lowers exception-related instructions for wasm such that
wasm modules can be compatible with emscripten's existing scheme and
share the support code.

Patch by Heejin Ahn

Differential Revision: https://reviews.llvm.org/D22958

llvm-svn: 277391
2016-08-01 21:34:04 +00:00
Matthias Braun 941a705b7b MachineFunction: Return reference for getFrameInfo(); NFC
getFrameInfo() never returns nullptr so we should use a reference
instead of a pointer.

llvm-svn: 277017
2016-07-28 18:40:00 +00:00
David Blaikie bef810ff95 [WebAssembly] Update for Target API (TargetRegistry::RegisterMCAsmBackend) change
llvm-svn: 276694
2016-07-25 21:41:42 +00:00
Derek Schuff 1a946e412c Fix calls to SelectionDAG::getStore
It was refactored in r275592. NFC

llvm-svn: 275601
2016-07-15 19:35:43 +00:00
Jacques Pienaar 71c30a14b7 Rename AnalyzeBranch* to analyzeBranch*.
Summary: NFC. Rename AnalyzeBranch/AnalyzeBranchPredicate to analyzeBranch/analyzeBranchPredicate to follow LLVM coding style and be consistent with TargetInstrInfo's analyzeCompare and analyzeSelect.

Reviewers: tstellarAMD, mcrosier

Subscribers: mcrosier, jholewinski, jfb, arsenm, dschuff, jyknight, dsanders, nemanjai

Differential Revision: https://reviews.llvm.org/D22409

llvm-svn: 275564
2016-07-15 14:41:04 +00:00
Nirav Dave 8603062ee4 Fix branch relaxation in 16-bit mode.
Thread through MCSubtargetInfo to relaxInstruction function allowing relaxation
to generate jumps with 16-bit sized immediates in 16-bit mode.

This fixes PR22097.

Reviewers: dwmw2, tstellarAMD, craig.topper, jyknight

Subscribers: jfb, arsenm, jyknight, llvm-commits, dsanders

Differential Revision: http://reviews.llvm.org/D20830

llvm-svn: 275068
2016-07-11 14:23:53 +00:00
Duncan P. N. Exon Smith 500d046989 WebAssembly: Avoid implicit iterator conversions, NFC
Avoid implicit conversions from MachineInstrBundleIterator to
MachineInstr* in the WebAssembly backend by preferring MachineInstr&
over MachineInstr*.

llvm-svn: 274912
2016-07-08 19:36:40 +00:00
Rafael Espindola d86e8bb0ed Delete MCCodeGenInfo.
MC doesn't really care about CodeGen stuff, so this was just
complicating target initialization.

llvm-svn: 274258
2016-06-30 18:25:11 +00:00
Duncan P. N. Exon Smith 9cfc75c214 CodeGen: Use MachineInstr& in TargetInstrInfo, NFC
This is mostly a mechanical change to make TargetInstrInfo API take
MachineInstr& (instead of MachineInstr* or MachineBasicBlock::iterator)
when the argument is expected to be a valid MachineInstr.  This is a
general API improvement.

Although it would be possible to do this one function at a time, that
would demand a quadratic amount of churn since many of these functions
call each other.  Instead I've done everything as a block and just
updated what was necessary.

This is mostly mechanical fixes: adding and removing `*` and `&`
operators.  The only non-mechanical change is to split
ARMBaseInstrInfo::getOperandLatencyImpl out from
ARMBaseInstrInfo::getOperandLatency.  Previously, the latter took a
`MachineInstr*` which it updated to the instruction bundle leader; now,
the latter calls the former either with the same `MachineInstr&` or the
bundle leader.

As a side effect, this removes a bunch of MachineInstr* to
MachineBasicBlock::iterator implicit conversions, a necessary step
toward fixing PR26753.

Note: I updated WebAssembly, Lanai, and AVR (despite being
off-by-default) since it turned out to be easy.  I couldn't run tests
for AVR since llc doesn't link with it turned on.

llvm-svn: 274189
2016-06-30 00:01:54 +00:00
Reid Kleckner 8f4bd1fdf2 Fix the wasm build by including EndianStream.h
llvm-svn: 273591
2016-06-23 18:12:31 +00:00
Benjamin Kramer bdc4956bac Pass DebugLoc and SDLoc by const ref.
This used to be free, copying and moving DebugLocs became expensive
after the metadata rewrite. Passing by reference eliminates a ton of
track/untrack operations. No functionality change intended.

llvm-svn: 272512
2016-06-12 15:39:02 +00:00
Benjamin Kramer f21beb2c74 Remove dead function with incredibly broken assert.
Found by clang-tidy's misc-assert-side-effect.

llvm-svn: 271887
2016-06-06 12:10:42 +00:00
Derek Schuff 5859a9ed80 [WebAssembly] Emit type signatures for declared functions
Under emscripten, C code can take the address of a function implemented
in Javascript (which is exposed via an import in wasm). Because imports
do not have linear memory address in wasm, we need to generate a thunk
to be the target of the indirect call; it call the import directly.

To make this possible, LLVM needs to emit the type signatures for these
functions, because they may not be called directly or referred to other
than where the address is taken.

This uses s new .s directive (.functype) which specifies the signature.

Differential Revision: http://reviews.llvm.org/D20891

Re-apply r271599 but instead of bailing with an error when a declared
function has multiple returns, replace it with a pointer argument. Also
add the test case I forgot to 'git add' last time around.

llvm-svn: 271703
2016-06-03 18:34:36 +00:00