• Nico Hartmann's avatar
    Revert "Faster JS-to-Wasm calls" · de50785e
    Nico Hartmann authored
    This reverts commit 860fcb1b.
    
    Reason for revert: https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20arm%20-%20sim%20-%20lite/13831/overview
    
    Original change's description:
    > Faster JS-to-Wasm calls
    >
    > This replaces https://chromium-review.googlesource.com/c/v8/v8/+/2376165/.
    >
    > Currently JS-to-Wasm calls go through a wrapper/trampoline, built on
    > the basis of the signature of a Wasm function to call, and whose task
    > is to:
    > - set "thread_in_wasm_flag" to true
    > - convert the arguments from tagged types into Wasm native types
    > - calculate the address of the Wasm function to call and call it
    > - convert back the result from Wasm native types into tagged types
    > - reset "thread_in_wasm_flag" to false.
    >
    > This CL tries to improve the performance of JS-to-Wasm calls by
    > inlining the code of the JS-to-Wasm wrappers in the call site.
    >
    > It introduces a new IR operand, JSWasmCall, which replaces JSCall for
    > this kind of calls. A 'JSWasmCall' node is associated to
    > WasmCallParameters, which contain information about the signature of
    > the Wasm function to call.
    >
    > WasmWrapperGraphBuilder::BuildJSToWasmWrapper is modified to avoid generating code to convert the types for the arguments
    > of the Wasm function, when the conversion is not necessary.
    > The actual inlining of the graph generated for this wrapper happens in
    > the simplified-lowering phase.
    >
    > A new builtin, JSToWasmLazyDeoptContinuation, is introduced to manage
    > lazy deoptimizations that can happen if the Wasm function callee calls
    > back some JS code that invalidates the compiled JS caller function.
    >
    > Bug: v8:11092
    > Change-Id: I3174c1c1f59b39107b333d1929ecc0584486b8ad
    > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2557538
    > Reviewed-by: Igor Sheludko <ishell@chromium.org>
    > Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
    > Reviewed-by: Georg Neis (ooo until January 5) <neis@chromium.org>
    > Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
    > Reviewed-by: Maya Lekova <mslekova@chromium.org>
    > Reviewed-by: Andreas Haas <ahaas@chromium.org>
    > Commit-Queue: Paolo Severini <paolosev@microsoft.com>
    > Cr-Commit-Position: refs/heads/master@{#71824}
    
    TBR=neis@chromium.org,ahaas@chromium.org,jgruber@chromium.org,tebbi@chromium.org,ishell@chromium.org,mslekova@chromium.org,nicohartmann@chromium.org,paolosev@microsoft.com
    
    Change-Id: I214cbdee74c1a2aaad907ffc84662ed25631983e
    No-Presubmit: true
    No-Tree-Checks: true
    No-Try: true
    Bug: v8:11092
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2595438Reviewed-by: 's avatarNico Hartmann <nicohartmann@chromium.org>
    Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#71825}
    de50785e
Name
Last commit
Last update
..
api Loading commit data...
asmjs Loading commit data...
ast Loading commit data...
base Loading commit data...
builtins Loading commit data...
codegen Loading commit data...
common Loading commit data...
compiler Loading commit data...
compiler-dispatcher Loading commit data...
d8 Loading commit data...
date Loading commit data...
debug Loading commit data...
deoptimizer Loading commit data...
diagnostics Loading commit data...
execution Loading commit data...
extensions Loading commit data...
flags Loading commit data...
handles Loading commit data...
heap Loading commit data...
ic Loading commit data...
init Loading commit data...
inspector Loading commit data...
interpreter Loading commit data...
json Loading commit data...
libplatform Loading commit data...
libsampler Loading commit data...
logging Loading commit data...
numbers Loading commit data...
objects Loading commit data...
parsing Loading commit data...
profiler Loading commit data...
protobuf Loading commit data...
regexp Loading commit data...
roots Loading commit data...
runtime Loading commit data...
sanitizer Loading commit data...
snapshot Loading commit data...
strings Loading commit data...
tasks Loading commit data...
third_party Loading commit data...
torque Loading commit data...
tracing Loading commit data...
trap-handler Loading commit data...
utils Loading commit data...
wasm Loading commit data...
zone Loading commit data...
DEPS Loading commit data...
DIR_METADATA Loading commit data...
OWNERS Loading commit data...