This allows the optimizing compiler to generate unboxed loads/stores
to fields containing double values. The double value is stored
in a reusable double object.
Unboxed loads/stores are generated for optimized code. Unoptimized code
allocates a new double on loads. To avoid performance regressions
for fields that are only written few times (e.g. only in the constructor)
I put a heuristic in place that
compares the usage count of setters and getters. Unboxed operations
are only generated if the setter is invoked a significant amount of
times (threshold is 10% of getter invocations).
The CL is so big because it changes the way LocationSummmary
is allocated: We now have a bit to generate different summaries
for optimized and unoptimized code.
R=srdjan@google.com
Review URL: https://codereview.chromium.org//99573005
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@31164 260f80e4-7a28-3924-810f-c04153c831b5
Fix issues 15244, 15148, 14869, 14000, and 13688 (was closed, but fragile).
Note that the current solution is not final as it may not be correct in more
complex cases not yet covered by language tests.
The final solution will require a 'trail' instead of a simple mark bit to
prevent operations involving recursive types to diverge.
R=asiva@google.com
Review URL: https://codereview.chromium.org//103913005
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@31087 260f80e4-7a28-3924-810f-c04153c831b5
-----
Often ToCString returns a representation which would be weighty or
unsightly to users. Instance::ToUserCString tries to return a
representation that will be more familiar to end users.
ToUserCString will be used in the vmservice to produce interesting
instance preview strings w/o calling toString. No doubt we will find
other uses for it too.
For example, strings are represented more as they would be in a user
program, with quotes and escapes: ("this\nis\ta\n\ntest") instead of (this
is a
test).
I intend to add better representations for short lists and maps
later, e.g. ([1,2]) instead of (Instance(length:2) of '_GrowableList').
I've added some tests to track current behavior.
Fix a problem where the vm internal names for private classes were
leaking out through ToCString. This is problematic because Dart's
default toString relies on ToCString (which surprised me). This fix
will be user-visible and, darn it, it's the right thing to do. For
example, before toString (in Dart) might yield:
Instance of '_MyPrivateClass@43df89GARBAGE4389'
Now it will yield:
Instance of '_MyPrivateClass'
(as an aside, do those single-quotes around the class name add any
meaning here?)
Massage the output of ToString for GrowableObjectArray to be more
consistent with other instance ToString output. This should not be user
visible, as lists define a reasonable toString.
R=johnmccutchan@google.com
Review URL: https://codereview.chromium.org//100833005
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@30996 260f80e4-7a28-3924-810f-c04153c831b5
Until now the parser marked native functions as native when parsing.
This may be too late for some functions. E.g. the native typed list
constructor may not be invoked because the intrinsic code is executed
instead (unless for example new-space allocation fails).
This causes missing type information when optimizing functions using
those recognized factory functions like Uint8List._new.
R=srdjan@google.com
Review URL: https://codereview.chromium.org//99373002
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@30846 260f80e4-7a28-3924-810f-c04153c831b5
In a static- or top-level variable v
var v = expr
static v = expr
If the initializer expression expr throws, the VM throws a
CyclicInitializationError when loading v afterwards, even though
this has nothing to do with cyclic initialization.
I'm changing the way implicit static getters and static initializers are
compiled. Static initializers are invoked from static getters.
They look as follows:
get:v {
if (field.value === transition_sentinel) {
field.value = null;
throw new CyclicInitializationError();
}
if (field.value === sentinel) {
field.value = transition_sentinel;
init:v();
}
return field.value;
}
init:v {
try {
field.value = expr;
} catch {
if (field.value === transition_sentinel) {
field.value = null;
}
rethrow;
}
}
BUG=http://dartbug.com/5802
TEST=language/lazy_static3_test,
language/throwing_lazy_variable_test,
co19/Language/12_Expressions/30_Identifier_Reference_A08_t02
R=hausner@google.com
Review URL: https://codereview.chromium.org//54713003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@29797 260f80e4-7a28-3924-810f-c04153c831b5
Since deserialization does not involve the normal object construction
procedure, any values written there won't be reflected in the guarded field
type. This results in incorrect optimized code because deoptimization of
dependent code objects in not triggered.
This CL adds tracking of field types and guarded list length when creating
objects via deserialization.
R=iposva@google.com
Review URL: https://codereview.chromium.org//50243004
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@29741 260f80e4-7a28-3924-810f-c04153c831b5
The AST for static getters differs between parsing the first time, and
subsequent parsings. This leads to a mismatch in deoptimization-ids
between the optimized and the unoptimized code.
This CL avoids creating different ASTs for the same static getters. To allow
better inlining of these getters, the initialization expression is wrapped in a
hidden static initializer-function. As a result the size of such getters is
constant and does not depend on the initializer expression.
R=srdjan@google.com
Review URL: https://codereview.chromium.org//51123003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@29680 260f80e4-7a28-3924-810f-c04153c831b5
Every 30 seconds (configurable by --code-collection-interval),
before a MarkSweep collection, this change halves a function's
usage count if it is unoptimized. If the function's usage count
reaches 0 as a result of this halving, it sets the function's
code pointers to null. Then, if the code object isn't marked
during the MarkSweep, it will be collected.
This change also checks for null code pointers in various
places, and recompiles/reconnects code if needed.
R=srdjan@google.com
Review URL: https://codereview.chromium.org//27802002
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@29209 260f80e4-7a28-3924-810f-c04153c831b5
original token stream in the presence of combinations of
multiline string and string interpolation. If not this will
cause mismatches when accessing code snippets, e.g when
reporting parser errors or assertions.
- Ensure that ScanAll and ScanTo are in sync when adding or
counting tokens.
- Added unit test for multiline strings and interpolation.
- Expanded GenerateSource unit test to iterate through all
loaded libraries.
- Do not report columns for compilation errors in snapshotted
code.
- Do not report columns from exceptions and errors when dealing
with snapshotted code.
- Remove length field from TokenDescriptor. It was unused.
- Remove TokenStream::ComputeTokenPosition. It was unused.
R=fschneider@google.com, hausner@google.com
Review URL: https://codereview.chromium.org//36323003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@29110 260f80e4-7a28-3924-810f-c04153c831b5
- Remove function name from output.
- Remove column from output (side effect: We can use fast version of
GetTokenLocation())
- Insert HANDLESCOPES
- Fold source file entries where easily possible, i.e., fold consecutive entries
created by functions in the same source file.
- Change format to
[{
"source": "...",
"hits": [<line>,<hitcount>, ...]
}, ... ]
BUG=
R=iposva@google.com
Review URL: https://codereview.chromium.org//24654003
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@28030 260f80e4-7a28-3924-810f-c04153c831b5
johnmccutchan@google.com