8252518: cache result of CompilerToVM.getComponentType

[dougxc]

Linux perf profiles of CompileTheWorld with libgraal show that CompilerToVM.getComponentType is the most expensive JVMCI VM entry point with almost 2% of total execution time:

+ 1.87% 0.04% [.] c2v_getComponentType
+ 0.54% 0.00% [.] c2v_installCode
     0.39% 0.00% [.] c2v_getResolvedJavaType0
     0.04% 0.00% [.] c2v_resolvePossiblyCachedConstantInPool
     0.03% 0.00% [.] c2v_interpreterFrameSize
     0.03% 0.01% [.] c2v_isAssignableFrom
     0.02% 0.00% [.] c2v_translate
     0.01% 0.00% [.] c2v_getIdentityHashCode

It's worth caching the result of this call.

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
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Issue

• JDK-8252518: [JVMCI] cache the result of CompilerToVM.getComponentType ⚠️ Title mismatch between PR and JBS.

Reviewers

• Vladimir Kozlov (@vnkozlov - Reviewer)
• Tom Rodriguez (@tkrodriguez - Reviewer)

Download

$ git fetch https://git.openjdk.java.net/jdk pull/172/head:pull/172
$ git checkout pull/172

[bridgekeeper]

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[openjdk]

@dougxc The following label will be automatically applied to this pull request: hotspot-compiler.

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[mlbridge]

Webrevs

• 00: Full (d74a4fb)

[vnkozlov]

Good.

[openjdk]

@dougxc This change now passes all automated pre-integration checks. In addition to the automated checks, the change must also fulfill all project specific requirements

After integration, the commit message will be:

8252518: cache result of CompilerToVM.getComponentType

Reviewed-by: kvn, never

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Since the source branch of this PR was last updated there have been 102 commits pushed to the master branch:

• c1df13b: 8253208: Move CDS related code to a separate class
• 24e12b3: 8247251: Assert (_pcs_length == 0 || last_pc()->pc_offset() < pc_offs…
• 3d5fea1: 8253434: Shenandoah: Cleanup ShenandoahRootScanner
• 8c02bdb: 8252921: NMT overwrite memory type for region assert when building dynamic archive
• 0c287de: 8253421: Initialize JFR trace-IDs with zero
• aa38624: 8248352: [TEST_BUG] Test test/jdk/java/awt/font/TextLayout/ArabicDiacriticTest.java can leave frame open
• ae20dd6: 8251496: Fix doclint warnings in jdk.net.httpserver
• b9729cb: 8253284: Zero OrderAccess barrier mappings are incorrect
• 284bbf0: 8253079: DeterministicDump.java fails due to garbage in structure padding
• a4affd5: 8253412: Unsupported GC options passed in JAVA_TOOL_OPTIONS are silently ignored
• ... and 92 more: https://git.openjdk.java.net/jdk/compare/9ea43a9213e560f5a2b9c762677e8ad94a44a1d7...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid automatic rebasing, please merge master into your branch, and then specify the current head hash when integrating, like this: /integrate c1df13b855984dc2197c0561f7a50c7a5a731dd9.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

[dougxc]

/integrate

[openjdk]

@dougxc Since your change was applied there have been 102 commits pushed to the master branch:

• c1df13b: 8253208: Move CDS related code to a separate class
• 24e12b3: 8247251: Assert (_pcs_length == 0 || last_pc()->pc_offset() < pc_offs…
• 3d5fea1: 8253434: Shenandoah: Cleanup ShenandoahRootScanner
• 8c02bdb: 8252921: NMT overwrite memory type for region assert when building dynamic archive
• 0c287de: 8253421: Initialize JFR trace-IDs with zero
• aa38624: 8248352: [TEST_BUG] Test test/jdk/java/awt/font/TextLayout/ArabicDiacriticTest.java can leave frame open
• ae20dd6: 8251496: Fix doclint warnings in jdk.net.httpserver
• b9729cb: 8253284: Zero OrderAccess barrier mappings are incorrect
• 284bbf0: 8253079: DeterministicDump.java fails due to garbage in structure padding
• a4affd5: 8253412: Unsupported GC options passed in JAVA_TOOL_OPTIONS are silently ignored
• ... and 92 more: https://git.openjdk.java.net/jdk/compare/9ea43a9213e560f5a2b9c762677e8ad94a44a1d7...master

Your commit was automatically rebased without conflicts.

Pushed as commit 0f26ab1.

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