Reason for revert:
[Sheriff] Breaks:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap/builds/5472
Original issue's description:
> [runtime] Replace global object link with native context link in all contexts.
>
> Previously all contexts had a link to the global object, but what is
> required in most cases (except for the global load, store and delete
> case) is the native context.
>
> This also removes the second dummy global object that was still linked
> to every native context. We will add a different mechanism to ensure
> that builtins do not pollute the actual global object during
> bootstrapping.
>
> Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.
>
> R=yangguo@chromium.org
>
> Committed: https://crrev.com/d290f204938295bfecc5c8e645ccfcff6e80ddb8
> Cr-Commit-Position: refs/heads/master@{#32375}
TBR=yangguo@chromium.org,mstarzinger@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1478303002
Cr-Commit-Position: refs/heads/master@{#32377}
Previously all contexts had a link to the global object, but what is
required in most cases (except for the global load, store and delete
case) is the native context.
This also removes the second dummy global object that was still linked
to every native context. We will add a different mechanism to ensure
that builtins do not pollute the actual global object during
bootstrapping.
Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1480003002
Cr-Commit-Position: refs/heads/master@{#32375}
This replaces internal GetConstructorName with toStringTag, .constructor's name
and class_name. This entirely changes how the name is computed for use in
devtools.
BUG=chromium:529177
LOG=n
Review URL: https://codereview.chromium.org/1435273002
Cr-Commit-Position: refs/heads/master@{#32374}
This will allow moving the test outcome check beyond the
multi-process boundary in a follow up. It'll allow wrapping
more complex test jobs like predicable mode on the multi-
process side, which will make the code easier to maintain.
BUG=
Review URL: https://codereview.chromium.org/1469833002
Cr-Commit-Position: refs/heads/master@{#32373}
Compaction selection now derives target fragmentation based on compaction speed
and a goal per page, if compaction speed has been traced. This way we avoid
overlong compaction of single pages.
This change could regress memory consumption if (a) the memory reducer does not
kick in, and (b) lots of medium fragmented pages would be compacted in our fast
path.
BUG=chromium:524425
LOG=N
Review URL: https://codereview.chromium.org/1480553004
Cr-Commit-Position: refs/heads/master@{#32361}
port 199bbdb40f (r32351)
original commit message:
Moves all files related to AST and scopes into ast/,
and all files related to scanner & parser to parsing/.
Also eliminates a couple of spurious dependencies.
BUG=
Review URL: https://codereview.chromium.org/1476353002
Cr-Commit-Position: refs/heads/master@{#32358}
port d3e5db0428 (r32336)
original commit message:
Up until now we sometimes pass Smi 0 around as closure and expect the
runtime to translate that appropriately. But we need to be careful in
some places to not confuse the Smi 0 with a real closure. However, we
could instead just pass the correct closure extracted from the native
context.
This addresses three long-standing TODOs in the JSTypedLowering pass.
Drive-by-fix: Further unify error message reporting for ToObject (we had
a special message in case of ToObject error in with context creation).
BUG=
Review URL: https://codereview.chromium.org/1474243002
Cr-Commit-Position: refs/heads/master@{#32356}
Moves all files related to AST and scopes into ast/,
and all files related to scanner & parser to parsing/.
Also eliminates a couple of spurious dependencies.
R=mstarzinger@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1481613002
Cr-Commit-Position: refs/heads/master@{#32351}
Create a visitor for evacuating objects for young and old generation. This is
the first step of preparing a task to process, both, newspace and oldspace
pages in parallel.
BUG=chromium:524425
LOG=N
Review URL: https://codereview.chromium.org/1470253002
Cr-Commit-Position: refs/heads/master@{#32349}
Decouple the implicit ToObject for with statements from the actual
creation of the with context. This way we can handle/optimize those
constructs separately.
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/1481753003
Cr-Commit-Position: refs/heads/master@{#32341}
The fast-prototype test has been outsmarted by constructor inlining
because the instantiation is been correctly optimized away. Internal
state introspection about prototype turning fast was upset by that.
R=bmeurer@chromium.org
BUG=v8:4544
LOG=n
Review URL: https://codereview.chromium.org/1474763007
Cr-Commit-Position: refs/heads/master@{#32338}
This adapts the constructor call inlining machinery to only allocate
implicit receivers and perform the return value check if the callee
needs it.
R=verwaest@chromium.org
BUG=v8:4544
LOG=n
Review URL: https://codereview.chromium.org/1476833002
Cr-Commit-Position: refs/heads/master@{#32337}
Up until now we sometimes pass Smi 0 around as closure and expect the
runtime to translate that appropriately. But we need to be careful in
some places to not confuse the Smi 0 with a real closure. However, we
could instead just pass the correct closure extracted from the native
context.
This addresses three long-standing TODOs in the JSTypedLowering pass.
Drive-by-fix: Further unify error message reporting for ToObject (we had
a special message in case of ToObject error in with context creation).
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1475383002
Cr-Commit-Position: refs/heads/master@{#32336}
Removing bytecode graph builder tests as they are high maintenance and
have limited use, ie they track changes in the implementation rather
than behaviour.
BUG=v8:4280
LOG=N
Review URL: https://codereview.chromium.org/1477783003
Cr-Commit-Position: refs/heads/master@{#32333}
This removes an optimization in the static JSFunction visitor that
eagerly marked through to the SharedFunctionInfo for code flushing
candidates. This causes all processing in VisitJSFunction to be
side-stepped and hence might cause leaks.
R=hpayer@chromium.org
Review URL: https://codereview.chromium.org/1476223002
Cr-Commit-Position: refs/heads/master@{#32332}
For a * b with only truncated word32 uses (or result known to be in
signed32 range), we can use Int32Mul if we know for sure that the
intermediate result is inside the safe integer range, and a and b are
in signed32 range.
Drive-by-fix: Also use TypeCache in SimplifiedLowering.
R=jarin@chromium.org
Review URL: https://codereview.chromium.org/1478953002
Cr-Commit-Position: refs/heads/master@{#32330}
