RFR: 8312235: [JVMCI] ConstantPool should not force eager resolution [v4]

[Tom Rodriguez]

On Wed, 26 Jul 2023 16:11:11 GMT, Doug Simon <dnsimon at openjdk.org> wrote:

>> The existing `jdk.vm.ci.meta.ConstantPool.lookupConstant(int cpi)` method forces eager resolving of constants. For `DynamicConstant`, `MethodHandle` and `MethodType`, this can mean invoking bootstrap methods, something that should not be done during JIT compilation. To avoid this, this PR adds the following to `jdk.vm.ci.meta.ConstantPool`:
>> 
>> 
>> /**
>>  * Looks up a constant at the specified index.
>>  *
>>  * If {@code resolve == false} and the denoted constant is of type
>>  * {@code JVM_CONSTANT_Dynamic}, {@code JVM_CONSTANT_MethodHandle} or
>>  * {@code JVM_CONSTANT_MethodType} and it's not yet resolved then
>>  * {@code null} is returned.
>>  *
>>  * @param cpi the constant pool index
>>  * @return the {@code Constant} or {@code JavaType} instance representing the constant pool
>>  *         entry
>>  */
>> Object lookupConstant(int cpi, boolean resolve);
>> 
>> 
>> Likewise, `jdk.vm.ci.meta.ConstantPool.lookupBootstrapMethodInvocation` has been fixed to no longer invoke the associated bootstrap method.
>> 
>> ---------
>> ### Progress
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>> - [x] Commit message must refer to an issue
>> 
>> 
>> 
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>
> Doug Simon has updated the pull request incrementally with one additional commit since the last revision:
> 
>   renamed index to cp_index

Marked as reviewed by never (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/14927#pullrequestreview-1548172519