[WebAssembly] Basic support for Wasm object file encoding.

With the "wasm32-unknown-unknown-wasm" triple, this allows writing out
simple wasm object files, and is another step in a larger series tow

[WebAssembly] Basic support for Wasm object file encoding.

With the "wasm32-unknown-unknown-wasm" triple, this allows writing out
simple wasm object files, and is another step in a larger series toward
migrating from ELF to general wasm object support. Note that this code
and the binary format itself is still experimental.

llvm-svn: 296190

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[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 follo

[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

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[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

[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

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[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: 28

[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

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[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 s

[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

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[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_indi

[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

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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

[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 entr

[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

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[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

[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

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Revert "Add asm.js-style setjmp/longjmp handling for wasm"

This reverts commit r280302, it broke the integration tests.

llvm-svn: 280329

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

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

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MachineFunctionProperties/MIRParser: Rename AllVRegsAllocated->NoVRegs, compute it

Rename AllVRegsAllocated to NoVRegs. This avoids the connotation of
running after register and simply describes tha

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

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[WebAssembly] Refactor WebAssemblyLowerEmscriptenException pass for setjmp/longjmp

This patch changes the code structure of
WebAssemblyLowerEmscriptenException pass to support both exception
handlin

[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

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[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.
* Ch

[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

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[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
unwi

[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

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[WebAssembly] Optimize away return instructions using fallthroughs.

This saves a small amount of code size, and is a first small step toward
passing values on the stack across block boundaries.

Dif

[WebAssembly] Optimize away return instructions using fallthroughs.

This saves a small amount of code size, and is a first small step toward
passing values on the stack across block boundaries.

Differential Review: http://reviews.llvm.org/D20450

llvm-svn: 270294

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[WebAssembly] Update WebAssembly target for r269988.

llvm-svn: 270017

Factor PrologEpilogInserter around spilling, frame finalization, and scavenging

PrologEpilogInserter has these 3 phases, which are related, but not
all of them are needed by all targets. This patch

Factor PrologEpilogInserter around spilling, frame finalization, and scavenging

PrologEpilogInserter has these 3 phases, which are related, but not
all of them are needed by all targets. This patch reorganizes PEI's
varous functions around those phases for more clear separation. It also
introduces a new TargetMachine hook, usesPhysRegsForPEI, which is true
for non-virtual targets. When it is true, all the phases operate as
before, and PEI requires the AllVRegsAllocated property on
MachineFunctions. Otherwise, CSR spilling and scavenging are skipped and
only prolog/epilog insertion/frame finalization is done.

Differential Revision: http://reviews.llvm.org/D18366

llvm-svn: 269750

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[WebAssembly] Move register stackification and coloring to a late phase.

Move the register stackification and coloring passes to run very late, after
PEI, tail duplication, and most other passes. Th

[WebAssembly] Move register stackification and coloring to a late phase.

Move the register stackification and coloring passes to run very late, after
PEI, tail duplication, and most other passes. This means that all code emitted
and expanded by those passes is now exposed to these passes. This also
eliminates the need for prologue/epilogue code to be manually stackified,
which significantly simplifies the code.

This does require running LiveIntervals a second time. It's useful to think
of these late passes not as late optimization passes, but as a domain-specific
compression algorithm based on knowledge of liveness information. It's used to
compress the code after all conventional optimizations are complete, which is
why it uses LiveIntervals at a phase when actual optimization passes don't
typically need it.

Differential Revision: http://reviews.llvm.org/D20075

llvm-svn: 269012

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CodeGen: Move TargetPassConfig from Passes.h to an own header; NFC

Many files include Passes.h but only a fraction needs to know about the
TargetPassConfig class. Move it into an own header. Also re

CodeGen: Move TargetPassConfig from Passes.h to an own header; NFC

Many files include Passes.h but only a fraction needs to know about the
TargetPassConfig class. Move it into an own header. Also rename
Passes.cpp to TargetPassConfig.cpp while we are at it.

llvm-svn: 269011

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Disable the PatchableFunction pass for NVPTX & Wasm

PatchableFunction requires AllVRegsAllocated that these targets don't
provide.

llvm-svn: 266720

[NFC] Header cleanup

Removed some unused headers, replaced some headers with forward class declarations.

Found using simple scripts like this one:
clear && ack --cpp -l '#include "llvm/ADT/IndexedM

[NFC] Header cleanup

Removed some unused headers, replaced some headers with forward class declarations.

Found using simple scripts like this one:
clear && ack --cpp -l '#include "llvm/ADT/IndexedMap.h"' | xargs grep -L 'IndexedMap[<]' | xargs grep -n --color=auto 'IndexedMap'

Patch by Eugene Kosov <claprix@yandex.ru>

Differential Revision: http://reviews.llvm.org/D19219

From: Mehdi Amini <mehdi.amini@apple.com>
llvm-svn: 266595

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[WebAssembly] Remove duplicate disabling of passes

Also put all the disabled passes together

llvm-svn: 264684

Introduce MachineFunctionProperties and the AllVRegsAllocated property

MachineFunctionProperties represents a set of properties that a MachineFunction
can have at particular points in time. Existing

Introduce MachineFunctionProperties and the AllVRegsAllocated property

MachineFunctionProperties represents a set of properties that a MachineFunction
can have at particular points in time. Existing examples of this idea are
MachineRegisterInfo::isSSA() and MachineRegisterInfo::tracksLiveness() which
will eventually be switched to use this mechanism.
This change introduces the AllVRegsAllocated property; i.e. the property that
all virtual registers have been allocated and there are no VReg operands
left.

With this mechanism, passes can declare that they require a particular property
to be set, or that they set or clear properties by implementing e.g.
MachineFunctionPass::getRequiredProperties(). The MachineFunctionPass base class
verifies that the requirements are met, and handles the setting and clearing
based on the delcarations. Passes can also directly query and update the current
properties of the MF if they want to have conditional behavior.

This change annotates the target-independent post-regalloc passes; future
changes will also annotate target-specific ones.

Reviewers: qcolombet, hfinkel

Differential Revision: http://reviews.llvm.org/D18421

llvm-svn: 264593

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[WebAssembly] Implement irreducible control flow.

This implements a very simple conservative transformation that doesn't
require more than linear code size growth. There's room for much more
optimiz

[WebAssembly] Implement irreducible control flow.

This implements a very simple conservative transformation that doesn't
require more than linear code size growth. There's room for much more
optimization in this space.

llvm-svn: 262982

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