On Wed, 24 Jan 2024 06:27:20 GMT, David Holmes wrote:
>> I think of this as an expression that is always evaluated to the same value.
>> The value itself is not interesting, it is the set of values that this
>> expression can take that we are talking about.
>
> This seems really weird to me
On Wed, 24 Jan 2024 06:50:36 GMT, Eirik Bjørsnøs wrote:
>> Please review this PR which rewrites the BadFactoryTest to pure Java/JUnit.
>> The test is currently implemented using a mix of shell script and a Java
>> main method.
>>
>> Reviewers may notice the following changes:
>>
>> - The
On Wed, 24 Jan 2024 05:03:29 GMT, Jaikiran Pai wrote:
> The only part that is unclear to me is the use of `@library
> /javax/script/JDK_8196959`. Does the test fail if that isn't added?
Thanks! I must have thought this was required to put the service definition
file on the classpath. But it
> Please review this PR which rewrites the BadFactoryTest to pure Java/JUnit.
> The test is currently implemented using a mix of shell script and a Java main
> method.
>
> Reviewers may notice the following changes:
>
> - The shell script file `BadFactoryTest.sh` has been retired and jtreg
On Tue, 23 Jan 2024 22:46:20 GMT, Quan Anh Mai wrote:
>> src/java.base/share/classes/jdk/internal/misc/JitCompiler.java line 56:
>>
>>> 54: */
>>> 55: @IntrinsicCandidate
>>> 56: public static boolean isCompileConstant(boolean expr) {
>>
>> Here and in other places: probably not
On Tue, 23 Jan 2024 19:16:49 GMT, Doug Simon wrote:
>> This PR changes `jdk.internal.vm.ci` such that it is loaded by the platform
>> class loader instead of the boot class loader. This allows Native Image to
>> load a version of JVMCI different than the version on top of which Native
>>
On Mon, 27 Nov 2023 17:44:24 GMT, Eirik Bjørsnøs wrote:
> Please review this PR which rewrites the BadFactoryTest to pure Java/JUnit.
> The test is currently implemented using a mix of shell script and a Java main
> method.
>
> Reviewers may notice the following changes:
>
> - The shell
On Mon, 27 Nov 2023 17:44:24 GMT, Eirik Bjørsnøs wrote:
> Please review this PR which rewrites the BadFactoryTest to pure Java/JUnit.
> The test is currently implemented using a mix of shell script and a Java main
> method.
>
> Reviewers may notice the following changes:
>
> - The shell
On Mon, 22 Jan 2024 18:42:56 GMT, Aggelos Biboudis
wrote:
>> This is the proposed patch for Primitive types in patterns, instanceof, and
>> switch (Preview).
>>
>> Draft spec here: https://cr.openjdk.org/~abimpoudis/instanceof/latest/
>
> Aggelos Biboudis has updated the pull request with a
This change mirrors what we did for ConcurrentHashMap in
https://github.com/openjdk/jdk/pull/17116. When we add all entries from one map
to anther, we should resize that map to the size of the sum of both maps.
I used the command below to run the benchmarks. I set a high heap to reduce
garbage
> Please consider this fix to ensure that going from `MessageFormat` to pattern
> string via `toPattern()` and then back via `new MessageFormat()` results in a
> format that is equivalent to the original.
>
> The quoting and escaping rules for `MessageFormat` pattern strings are really
>
On Tue, 23 Jan 2024 22:15:40 GMT, Justin Lu wrote:
>> Archie Cobbs has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> Add @implNote to Javadoc for toPattern().
>
> test/jdk/java/text/Format/MessageFormat/MessageFormatToPatternTest.java
On Tue, 23 Jan 2024 23:12:19 GMT, Archie Cobbs wrote:
>> test/jdk/java/text/Format/MessageFormat/MessageFormatToPatternTest.java line
>> 96:
>>
>>> 94: @ParameterizedTest
>>> 95: @MethodSource("testCases")
>>> 96: public void testRoundTrip(MessageFormat format1) {
>>
>> Can we
On Tue, 23 Jan 2024 23:00:29 GMT, Naoto Sato wrote:
>> src/java.base/share/classes/java/text/MessageFormat.java line 556:
>>
>>> 554: * does not necessarily equal the previously applied pattern.
>>> 555: *
>>> 556: * @implNote The string returned by this method can be used to
On Tue, 23 Jan 2024 22:13:09 GMT, Justin Lu wrote:
>> Archie Cobbs has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> Add @implNote to Javadoc for toPattern().
>
> src/java.base/share/classes/java/text/MessageFormat.java line 1:
>
>> 1:
On Tue, 23 Jan 2024 22:13:14 GMT, Justin Lu wrote:
>> Archie Cobbs has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> Add @implNote to Javadoc for toPattern().
>
> src/java.base/share/classes/java/text/MessageFormat.java line 556:
>
>>
On Tue, 23 Jan 2024 20:01:45 GMT, Paul Sandoz wrote:
>> Quan Anh Mai has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> ident
>
> src/java.base/share/classes/jdk/internal/misc/JitCompiler.java line 32:
>
>> 30: *
On Tue, 23 Jan 2024 17:42:40 GMT, Aleksey Shipilev wrote:
>> Quan Anh Mai has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> ident
>
> src/java.base/share/classes/jdk/internal/misc/JitCompiler.java line 56:
>
>> 54: */
>> 55:
On Tue, 23 Jan 2024 17:40:52 GMT, Aleksey Shipilev wrote:
>> Quan Anh Mai has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> ident
>
> src/java.base/share/classes/jdk/internal/misc/JitCompiler.java line 119:
>
>> 117: * @see
On Wed, 10 Jan 2024 21:05:38 GMT, Justin Lu wrote:
> Please review this PR which implements toString() for the `Format`
> subclasses. Corresponding CSR:
> [JDK-8323088](https://bugs.openjdk.org/browse/JDK-8323088)
>
> The general specification follows a template that provides the locale (if
On Tue, 23 Jan 2024 18:40:42 GMT, Justin Lu wrote:
> Please review this PR which clarifies some confusion for the digit getter and
> setter methods of DecimalFormat.
>
> When formatting non `BigInteger` and `BigDecimal` values, DecimalFormat uses
> 309/340 as hard limits for integer and
On Tue, 23 Jan 2024 18:40:42 GMT, Justin Lu wrote:
> Please review this PR which clarifies some confusion for the digit getter and
> setter methods of DecimalFormat.
>
> When formatting non `BigInteger` and `BigDecimal` values, DecimalFormat uses
> 309/340 as hard limits for integer and
On Fri, 19 Jan 2024 23:30:43 GMT, Archie Cobbs wrote:
>> Please consider this fix to ensure that going from `MessageFormat` to
>> pattern string via `toPattern()` and then back via `new MessageFormat()`
>> results in a format that is equivalent to the original.
>>
>> The quoting and escaping
On Tue, 23 Jan 2024 18:53:39 GMT, Jim Laskey wrote:
>> Currently String::translateEscapes does not support unicode escapes,
>> reported as a IllegalArgumentException("Invalid escape sequence: ...").
>> String::translateEscapes should translate unicode escape sequences to
>> provide full
On Tue, 23 Jan 2024 18:24:59 GMT, Jorn Vernee wrote:
>> Should we make these unaligned access modes throw ISE like before, when the
>> given index is unaligned?
>
> You mean `get` and `set`? They should never throw, as unaligned access is
> fine. For other access modes, we can never guarantee
> From: "Viktor Klang"
> To: "Remi Forax"
> Cc: "core-libs-dev" , "Paul Sandoz"
>
> Sent: Monday, January 22, 2024 10:06:27 PM
> Subject: Re: Gatherer: spliterator characteristics are not propagated
>> The flags are in sync with the implementation because the only way to create
>> a
>>
On Tue, 23 Jan 2024 17:21:47 GMT, Quan Anh Mai wrote:
>> Hi,
>>
>> This patch introduces `JitCompiler::isConstantExpression` which can be used
>> to statically determine whether an expression has been constant-folded by
>> the Jit compiler, leading to more constant-folding opportunities. For
> Please review this PR which implements toString() for the `Format`
> subclasses. Corresponding CSR:
> [JDK-8323088](https://bugs.openjdk.org/browse/JDK-8323088)
>
> The general specification follows a template that provides the locale (if the
> class is localized) and any relevant patterns.
On Tue, 23 Jan 2024 17:00:20 GMT, xxDark wrote:
> Passing `null` as parent class loader would suffice as boot loader just uses
> `findBootstrapClassOrNull` in `JavaLangAccess` either way
Thanks! I've simplified the test accordingly:
1642276ea22a5d789e01a5ecb1059d8c5c8be284
-
PR
> This PR changes `jdk.internal.vm.ci` such that it is loaded by the platform
> class loader instead of the boot class loader. This allows Native Image to
> load a version of JVMCI different than the version on top of which Native
> Image is running. This capability is demonstrated and tested
> Currently String::translateEscapes does not support unicode escapes, reported
> as a IllegalArgumentException("Invalid escape sequence: ...").
> String::translateEscapes should translate unicode escape sequences to provide
> full coverage,
Jim Laskey has updated the pull request
Please review this PR which clarifies some confusion for the digit getter and
setter methods of DecimalFormat.
When formatting non `BigInteger` and `BigDecimal` values, DecimalFormat uses
309/340 as hard limits for integer and fraction digit limits, regardless of the
value set by the user.
On Tue, 23 Jan 2024 14:43:24 GMT, Chen Liang wrote:
> Also curious, is there any documentation (like JVMS) that allows JVMs to make
> no offset into byte arrays aligned for larger access? Would be helpful if we
> can have a reference here.
There is simply no guarantee in the JVMS that array
On Tue, 23 Jan 2024 14:30:08 GMT, Chen Liang wrote:
>> Good idea. Thanks
>
> Should we make these unaligned access modes throw ISE like before, when the
> given index is unaligned?
You mean `get` and `set`? They should never throw, as unaligned access is fine.
For other access modes, we can
On Tue, 23 Jan 2024 16:01:05 GMT, Aleksey Shipilev wrote:
>> Would it be possible to list further examples where this might be used?
>> Asking because I'm wondering about the usability and maintainability of
>> if-then-else code.
>
>> Would it be possible to list further examples where this
On Tue, 23 Jan 2024 17:21:47 GMT, Quan Anh Mai wrote:
>> Hi,
>>
>> This patch introduces `JitCompiler::isConstantExpression` which can be used
>> to statically determine whether an expression has been constant-folded by
>> the Jit compiler, leading to more constant-folding opportunities. For
On Tue, 23 Jan 2024 16:01:05 GMT, Aleksey Shipilev wrote:
>> Would it be possible to list further examples where this might be used?
>> Asking because I'm wondering about the usability and maintainability of
>> if-then-else code.
>
>> Would it be possible to list further examples where this
On Mon, 22 Jan 2024 22:10:44 GMT, Joshua Cao wrote:
>> test/micro/org/openjdk/bench/java/util/concurrent/Maps.java line 122:
>>
>>> 120: @Benchmark
>>> 121: public ConcurrentHashMap
>>> testConcurrentHashMapPutAll() {
>>> 122: ConcurrentHashMap map = new
>>>
> Hi,
>
> This patch introduces `JitCompiler::isConstantExpression` which can be used
> to statically determine whether an expression has been constant-folded by the
> Jit compiler, leading to more constant-folding opportunities. For example, it
> can be used in
On Mon, 22 Jan 2024 22:13:50 GMT, Joshua Cao wrote:
>> ConcurrentHashMap's copy constructor calls `putAll()` -> `tryPresize()` ->
>> `transfer()`. When coming from the copy constructor, the Map is empty, so
>> there is nothing to transfer. But `transfer()` will still copy all the empty
>>
On Mon, 22 Jan 2024 17:34:16 GMT, Doug Simon wrote:
> This PR changes `jdk.internal.vm.ci` such that it is loaded by the platform
> class loader instead of the boot class loader. This allows Native Image to
> load a version of JVMCI different than the version on top of which Native
> Image is
On Tue, 16 Jan 2024 09:01:35 GMT, Aleksey Shipilev wrote:
>> Since recent work to improve `tier4` performance, we actually test
>> `tier{1,2,3,4}` often, which includes all the tests in current tree. It
>> would be more convenient to just have the `all` test group/alias, so that we
>> can do
On Mon, 15 Jan 2024 11:05:09 GMT, Aleksey Shipilev wrote:
> Since recent work to improve `tier4` performance, we actually test
> `tier{1,2,3,4}` often, which includes all the tests in current tree. It would
> be more convenient to just have the `all` test group/alias, so that we can do
>
On Tue, 16 Jan 2024 09:01:35 GMT, Aleksey Shipilev wrote:
>> Since recent work to improve `tier4` performance, we actually test
>> `tier{1,2,3,4}` often, which includes all the tests in current tree. It
>> would be more convenient to just have the `all` test group/alias, so that we
>> can do
On Tue, 23 Jan 2024 15:44:40 GMT, Aleksey Shipilev wrote:
>> Quan Anh Mai has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> add more overloads
>
> src/hotspot/share/classfile/vmIntrinsics.hpp line 927:
>
>> 925:
> Hi,
>
> This patch introduces `JitCompiler::isConstantExpression` which can be used
> to statically determine whether an expression has been constant-folded by the
> Jit compiler, leading to more constant-folding opportunities. For example, it
> can be used in
On Mon, 22 Jan 2024 17:34:16 GMT, Doug Simon wrote:
> This PR changes `jdk.internal.vm.ci` such that it is loaded by the platform
> class loader instead of the boot class loader. This allows Native Image to
> load a version of JVMCI different than the version on top of which Native
> Image is
This PR changes `jdk.internal.vm.ci` such that it is loaded by the platform
class loader instead of the boot class loader. This allows Native Image to load
a version of JVMCI different than the version on top of which Native Image is
running. This capability is demonstrated and tested by
On Tue, 23 Jan 2024 15:52:29 GMT, Alan Bateman wrote:
> Would it be possible to list further examples where this might be used?
> Asking because I'm wondering about the usability and maintainability of
> if-then-else code.
A similar thing is already used in JDK:
On Tue, 23 Jan 2024 11:18:43 GMT, Quan Anh Mai wrote:
>> Hi,
>>
>> This patch introduces `JitCompiler::isConstantExpression` which can be used
>> to statically determine whether an expression has been constant-folded by
>> the Jit compiler, leading to more constant-folding opportunities. For
On Tue, 23 Jan 2024 11:18:43 GMT, Quan Anh Mai wrote:
>> Hi,
>>
>> This patch introduces `JitCompiler::isConstantExpression` which can be used
>> to statically determine whether an expression has been constant-folded by
>> the Jit compiler, leading to more constant-folding opportunities. For
> Please review this patch which adds a jlink mode to the JDK which doesn't
> need the packaged modules being present. A.k.a run-time image based jlink.
> Fundamentally this patch adds an option to use `jlink` even though your JDK
> install might not come with the packaged modules (directory
On Tue, 16 Jan 2024 09:01:35 GMT, Aleksey Shipilev wrote:
>> Since recent work to improve `tier4` performance, we actually test
>> `tier{1,2,3,4}` often, which includes all the tests in current tree. It
>> would be more convenient to just have the `all` test group/alias, so that we
>> can do
On Tue, 23 Jan 2024 11:18:43 GMT, Quan Anh Mai wrote:
>> Hi,
>>
>> This patch introduces `JitCompiler::isConstantExpression` which can be used
>> to statically determine whether an expression has been constant-folded by
>> the Jit compiler, leading to more constant-folding opportunities. For
On Tue, 23 Jan 2024 14:42:20 GMT, Roger Riggs wrote:
> Is there any place to document the new keyword or its usage; it does not seem
> very discoverable just existing in the TEST.ROOT and some tests.
I don't think there is a place to describe keywords, except in the relevant
`TEST.ROOT`-s.
On Wed, 10 Jan 2024 22:12:40 GMT, Brent Christian wrote:
>> Classes in the `java.lang.ref` package would benefit from an update to bring
>> the spec in line with how the VM already behaves. The changes would focus on
>> _happens-before_ edges at some key points during reference processing.
>>
On Tue, 23 Jan 2024 11:56:58 GMT, Jatin Bhateja wrote:
>> Hi,
>>
>> Patch optimizes non-subword vector compress and expand APIs for x86 AVX2
>> only targets.
>> Upcoming E-core Xeons (Sierra Forest) and Hybrid CPUs only support AVX2
>> instruction set.
>> These are very frequently used APIs
On Fri, 12 Jan 2024 22:41:46 GMT, Justin Lu wrote:
>> Please review this PR which implements toString() for the `Format`
>> subclasses. Corresponding CSR:
>> [JDK-8323088](https://bugs.openjdk.org/browse/JDK-8323088)
>>
>> The general specification follows a template that provides the locale
On Thu, 16 Nov 2023 18:10:28 GMT, Jorn Vernee wrote:
>> src/java.base/share/classes/java/lang/invoke/MethodHandles.java line 4518:
>>
>>> 4516: * Only plain {@linkplain VarHandle.AccessMode#GET get} and
>>> {@linkplain VarHandle.AccessMode#SET set}
>>> 4517: * access modes are
On Thu, 18 Jan 2024 21:35:06 GMT, Mandy Chung wrote:
> > > If I read the code correctly, the image created with this option will
> > > enable multi-hops unconditionally? i.e. no timestamp file created and
> > > disable the check completely. I think the .stamp file should be present
> > > in
On Wed, 15 Nov 2023 22:46:03 GMT, Jorn Vernee wrote:
> See the JBS issue for an extended problem description.
>
> This patch changes the specification and implementation of
> `MethodHandles::byteArrayViewVarHandle`,
> `MethodHandles::byteBufferViewVarHandle`, `ByteBuffer::alignedSlice`, and
On Mon, 15 Jan 2024 10:48:23 GMT, Aleksey Shipilev wrote:
> Some jtreg tests require resolvable external dependencies. This resolution is
> delegated to JIB, which is not used in vanilla OpenJDK testing. It would be
> convenient to add a keyword that marks tests that require these external
>
> Please review this patch which adds a jlink mode to the JDK which doesn't
> need the packaged modules being present. A.k.a run-time image based jlink.
> Fundamentally this patch adds an option to use `jlink` even though your JDK
> install might not come with the packaged modules (directory
On Mon, 22 Jan 2024 09:31:43 GMT, sendaoYan wrote:
> 8323640: [TESTBUG]testMemoryFailCount in
> jdk/internal/platform/docker/TestDockerMemoryMetrics.java always fail because
> OOM killed
This pull request has now been integrated.
Changeset: 791b427f
Author:sendaoYan
Committer: Severin
On Tue, 23 Jan 2024 13:04:43 GMT, sendaoYan wrote:
>> 8323640: [TESTBUG]testMemoryFailCount in
>> jdk/internal/platform/docker/TestDockerMemoryMetrics.java always fail
>> because OOM killed
>
> sendaoYan has updated the pull request incrementally with one additional
> commit since the last
On Tue, 23 Jan 2024 13:04:43 GMT, sendaoYan wrote:
>> 8323640: [TESTBUG]testMemoryFailCount in
>> jdk/internal/platform/docker/TestDockerMemoryMetrics.java always fail
>> because OOM killed
>
> sendaoYan has updated the pull request incrementally with one additional
> commit since the last
> 8323640: [TESTBUG]testMemoryFailCount in
> jdk/internal/platform/docker/TestDockerMemoryMetrics.java always fail because
> OOM killed
sendaoYan has updated the pull request incrementally with one additional commit
since the last revision:
8323640: [TESTBUG]testMemoryFailCount in
On Tue, 23 Jan 2024 08:17:13 GMT, Emanuel Peter wrote:
>> Jatin Bhateja has updated the pull request incrementally with one additional
>> commit since the last revision:
>>
>> Review comments resolution
>
> src/hotspot/cpu/x86/c2_MacroAssembler_x86.cpp line 5301:
>
>> 5299:
> Hi,
>
> Patch optimizes non-subword vector compress and expand APIs for x86 AVX2 only
> targets.
> Upcoming E-core Xeons (Sierra Forest) and Hybrid CPUs only support AVX2
> instruction set.
> These are very frequently used APIs in columnar database filter operation.
>
> Implementation uses a
On Tue, 16 Jan 2024 09:01:35 GMT, Aleksey Shipilev wrote:
>> Since recent work to improve `tier4` performance, we actually test
>> `tier{1,2,3,4}` often, which includes all the tests in current tree. It
>> would be more convenient to just have the `all` test group/alias, so that we
>> can do
On Tue, 23 Jan 2024 11:18:43 GMT, Quan Anh Mai wrote:
>> Hi,
>>
>> This patch introduces `JitCompiler::isConstantExpression` which can be used
>> to statically determine whether an expression has been constant-folded by
>> the Jit compiler, leading to more constant-folding opportunities. For
> Hi,
>
> This patch introduces `JitCompiler::isConstantExpression` which can be used
> to statically determine whether an expression has been constant-folded by the
> Jit compiler, leading to more constant-folding opportunities. For example, it
> can be used in
I backport this to fix this issue in 22. We see it failing there in our CI.
-
Commit messages:
- Backport c2e77e2f17b624e750dea8fd51bbfde99596690e
Changes: https://git.openjdk.org/jdk22/pull/95/files
Webrev: https://webrevs.openjdk.org/?repo=jdk22=95=00
Issue:
On Tue, 23 Jan 2024 01:32:45 GMT, David Holmes wrote:
> Seems quite reasonable.
Thanks!
I shall wait for more reviewers, in case someone has an issue with
`external-dep` as the flag name.
-
PR Comment: https://git.openjdk.org/jdk/pull/17421#issuecomment-1905719123
On Wed, 15 Nov 2023 22:46:03 GMT, Jorn Vernee wrote:
> See the JBS issue for an extended problem description.
>
> This patch changes the specification and implementation of
> `MethodHandles::byteArrayViewVarHandle`,
> `MethodHandles::byteBufferViewVarHandle`, `ByteBuffer::alignedSlice`, and
On Tue, 23 Jan 2024 01:58:40 GMT, sendaoYan wrote:
>> 8323640: [TESTBUG]testMemoryFailCount in
>> jdk/internal/platform/docker/TestDockerMemoryMetrics.java always fail
>> because OOM killed
>
> sendaoYan has updated the pull request incrementally with one additional
> commit since the last
On Tue, 23 Jan 2024 09:31:51 GMT, Quan Anh Mai wrote:
> Maybe I am ignorant but doesn't the definition of an intrinsics contain the
> signature of the method as well?
The definitions in `vmIntrinsics`, sure, they require full signature for
`@IntrinsicCandidate` methods. It would yield some
On Tue, 23 Jan 2024 08:16:07 GMT, Aleksey Shipilev wrote:
>> Hi,
>>
>> This patch introduces `JitCompiler::isConstantExpression` which can be used
>> to statically determine whether an expression has been constant-folded by
>> the Jit compiler, leading to more constant-folding opportunities.
On Tue, 23 Jan 2024 08:16:07 GMT, Aleksey Shipilev wrote:
> I would suggest we just do the private
> `java.lang.{Integer,...}.isCompileConstant` methods and bind them to that
> intrinsic.
Maybe I am ignorant but doesn't the definition of an intrinsics contain the
signature of the method as
On Tue, 23 Jan 2024 08:16:07 GMT, Aleksey Shipilev wrote:
>> Hi,
>>
>> This patch introduces `JitCompiler::isConstantExpression` which can be used
>> to statically determine whether an expression has been constant-folded by
>> the Jit compiler, leading to more constant-folding opportunities.
> Hi,
>
> This patch introduces `JitCompiler::isConstantExpression` which can be used
> to statically determine whether an expression has been constant-folded by the
> Jit compiler, leading to more constant-folding opportunities. For example, it
> can be used in
On Sat, 20 Jan 2024 09:55:45 GMT, Jatin Bhateja wrote:
>> Hi,
>>
>> Patch optimizes non-subword vector compress and expand APIs for x86 AVX2
>> only targets.
>> Upcoming E-core Xeons (Sierra Forest) and Hybrid CPUs only support AVX2
>> instruction set.
>> These are very frequently used APIs
On Tue, 23 Jan 2024 08:10:54 GMT, Quan Anh Mai wrote:
> Hi,
>
> This patch introduces `JitCompiler::isConstantExpression` which can be used
> to statically determine whether an expression has been constant-folded by the
> Jit compiler, leading to more constant-folding opportunities. For
Hi,
This patch introduces `JitCompiler::isConstantExpression` which can be used to
statically determine whether an expression has been constant-folded by the Jit
compiler, leading to more constant-folding opportunities. For example, it can
be used in `MemorySessionImpl::checkValidStateRaw` to
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